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{************************************************************************}
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{ }
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{ Borland Delphi Visual Component Library }
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{ InterBase Express core components }
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{ }
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{ Copyright (c) 1998-2000 Inprise Corporation }
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{ }
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{ InterBase Express is based in part on the product }
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{ Free IB Components, written by Gregory H. Deatz for }
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
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{ Free IB Components is used under license. }
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{ }
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{ The contents of this file are subject to the InterBase }
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{ Public License Version 1.0 (the "License"); you may not }
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{ use this file except in compliance with the License. You }
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
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{ Software distributed under the License is distributed on }
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
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{ express or implied. See the License for the specific language }
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{ governing rights and limitations under the License. }
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{ The Original Code was created by InterBase Software Corporation }
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{ and its successors. }
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{ Portions created by Inprise Corporation are Copyright (C) Inprise }
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{ Corporation. All Rights Reserved. }
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{ Contributor(s): Jeff Overcash }
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{ }
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{ IBX For Lazarus (Firebird Express) }
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
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{ Portions created by MWA Software are copyright McCallum Whyman }
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{ Associates Ltd 2011 }
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{ }
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{************************************************************************}
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unit IBDatabase;
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{$Mode Delphi}
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interface
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uses
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{$IFDEF WINDOWS }
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Windows,
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{$ELSE}
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unix,
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{$ENDIF}
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SysUtils, Classes, FPTimer, IBHeader, IBExternals, DB,
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IB, CustApp;
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const
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DPBPrefix = 'isc_dpb_';
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DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
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'cdd_pathname',
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'allocation',
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'journal',
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'page_size',
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'num_buffers',
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'buffer_length',
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'debug',
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'garbage_collect',
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'verify',
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'sweep',
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'enable_journal',
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'disable_journal',
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'dbkey_scope',
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'number_of_users',
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'trace',
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'no_garbage_collect',
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'damaged',
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'license',
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'sys_user_name',
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'encrypt_key',
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'activate_shadow',
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'sweep_interval',
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'delete_shadow',
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'force_write',
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'begin_log',
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'quit_log',
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'no_reserve',
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'user_name',
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'password',
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'password_enc',
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'sys_user_name_enc',
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'interp',
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'online_dump',
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'old_file_size',
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'old_num_files',
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'old_file',
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'old_start_page',
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'old_start_seqno',
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'old_start_file',
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'drop_walfile',
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'old_dump_id',
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'wal_backup_dir',
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'wal_chkptlen',
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'wal_numbufs',
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'wal_bufsize',
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'wal_grp_cmt_wait',
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'lc_messages',
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'lc_ctype',
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'cache_manager',
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'shutdown',
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'online',
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'shutdown_delay',
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'reserved',
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'overwrite',
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'sec_attach',
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'disable_wal',
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'connect_timeout',
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'dummy_packet_interval',
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'gbak_attach',
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'sql_role_name',
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'set_page_buffers',
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'working_directory',
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'sql_dialect',
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'set_db_readonly',
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'set_db_sql_dialect',
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'gfix_attach',
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'gstat_attach'
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);
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TPBPrefix = 'isc_tpb_';
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TPBConstantNames: array[1..isc_tpb_last_tpb_constant] of string = (
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'consistency',
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'concurrency',
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'shared',
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'protected',
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'exclusive',
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'wait',
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'nowait',
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'read',
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'write',
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'lock_read',
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'lock_write',
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'verb_time',
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'commit_time',
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'ignore_limbo',
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'read_committed',
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'autocommit',
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'rec_version',
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'no_rec_version',
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'restart_requests',
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'no_auto_undo'
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);
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type
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TIBDatabase = class;
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TIBTransaction = class;
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TIBBase = class;
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TIBDatabaseLoginEvent = procedure(Database: TIBDatabase;
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LoginParams: TStrings) of object;
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TIBFileName = type string;
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{ TIBDatabase }
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TIBDataBase = class(TCustomConnection)
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private
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FAllowStreamedConnected: boolean;
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FHiddenPassword: string;
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FIBLoaded: Boolean;
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FOnLogin: TIBDatabaseLoginEvent;
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FSQLHourGlass: Boolean;
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FTraceFlags: TTraceFlags;
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FDBSQLDialect: Integer;
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FSQLDialect: Integer;
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FOnDialectDowngradeWarning: TNotifyEvent;
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FCanTimeout: Boolean;
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FSQLObjects: TList;
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FTransactions: TList;
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FDBName: TIBFileName;
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FDBParams: TStrings;
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FDBParamsChanged: Boolean;
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FDPB: PChar;
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FDPBLength: Short;
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FHandle: TISC_DB_HANDLE;
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FHandleIsShared: Boolean;
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FOnIdleTimer: TNotifyEvent;
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FDefaultTransaction: TIBTransaction;
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FInternalTransaction: TIBTransaction;
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FStreamedConnected: Boolean;
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FTimer: TFPTimer;
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FUserNames: TStringList;
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FDataSets: TList;
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FLoginCalled: boolean;
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FCharSetSizes: array of integer;
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FCharSetNames: array of string;
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procedure EnsureInactive;
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function GetDBSQLDialect: Integer;
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function GetSQLDialect: Integer;
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procedure SetSQLDialect(const Value: Integer);
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procedure ValidateClientSQLDialect;
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procedure DBParamsChange(Sender: TObject);
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procedure DBParamsChanging(Sender: TObject);
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function GetSQLObject(Index: Integer): TIBBase;
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function GetSQLObjectCount: Integer;
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function GetDBParamByDPB(const Idx: Integer): String;
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function GetIdleTimer: Integer;
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function GetTransaction(Index: Integer): TIBTransaction;
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function GetTransactionCount: Integer;
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function Login: Boolean;
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procedure LoadCharSetInfo;
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procedure SetDatabaseName(const Value: TIBFileName);
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procedure SetDBParamByDPB(const Idx: Integer; Value: String);
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procedure SetDBParams(Value: TStrings);
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procedure SetDefaultTransaction(Value: TIBTransaction);
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procedure SetIdleTimer(Value: Integer);
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procedure TimeoutConnection(Sender: TObject);
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function GetIsReadOnly: Boolean;
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function AddSQLObject(ds: TIBBase): Integer;
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procedure RemoveSQLObject(Idx: Integer);
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procedure RemoveSQLObjects;
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procedure InternalClose(Force: Boolean);
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protected
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procedure DoConnect; override;
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procedure DoDisconnect; override;
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function GetConnected: Boolean; override;
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procedure CheckStreamConnect;
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procedure HandleException(Sender: TObject);
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procedure Notification( AComponent: TComponent; Operation: TOperation); override;
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function GetDataset(Index : longint) : TDataset; override;
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function GetDataSetCount : Longint; override;
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procedure ReadState(Reader: TReader); override;
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procedure SetConnected (Value : boolean); override;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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procedure ApplyUpdates(const DataSets: array of TDataSet);
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procedure CloseDataSets;
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procedure CheckActive;
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procedure CheckInactive;
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procedure CreateDatabase;
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procedure DropDatabase;
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procedure ForceClose;
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procedure GetFieldNames(const TableName: string; List: TStrings);
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procedure GetTableNames(List: TStrings; SystemTables: Boolean = False);
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function IndexOfDBConst(st: String): Integer;
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function TestConnected: Boolean;
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procedure CheckDatabaseName;
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function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
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function AddTransaction(TR: TIBTransaction): Integer;
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function FindTransaction(TR: TIBTransaction): Integer;
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function FindDefaultTransaction(): TIBTransaction;
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procedure RemoveTransaction(Idx: Integer);
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procedure RemoveTransactions;
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procedure SetHandle(Value: TISC_DB_HANDLE);
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property Handle: TISC_DB_HANDLE read FHandle;
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property IsReadOnly: Boolean read GetIsReadOnly;
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property DBParamByDPB[const Idx: Integer]: String read GetDBParamByDPB
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write SetDBParamByDPB;
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property SQLObjectCount: Integer read GetSQLObjectCount;
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property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
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property HandleIsShared: Boolean read FHandleIsShared;
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property TransactionCount: Integer read GetTransactionCount;
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property Transactions[Index: Integer]: TIBTransaction read GetTransaction;
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property InternalTransaction: TIBTransaction read FInternalTransaction;
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published
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property Connected;
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property AllowStreamedConnected: boolean read FAllowStreamedConnected
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write FAllowStreamedConnected;
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property DatabaseName: TIBFileName read FDBName write SetDatabaseName;
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property Params: TStrings read FDBParams write SetDBParams;
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property LoginPrompt default True;
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property DefaultTransaction: TIBTransaction read FDefaultTransaction
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write SetDefaultTransaction;
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property IdleTimer: Integer read GetIdleTimer write SetIdleTimer;
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property SQLDialect : Integer read GetSQLDialect write SetSQLDialect default 3;
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property SQLHourGlass: Boolean read FSQLHourGlass write FSQLHourGlass default true;
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property DBSQLDialect : Integer read FDBSQLDialect;
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property TraceFlags: TTraceFlags read FTraceFlags write FTraceFlags;
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property AfterConnect;
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property AfterDisconnect;
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property BeforeConnect;
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property BeforeDisconnect;
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property OnLogin: TIBDatabaseLoginEvent read FOnLogin write FOnLogin;
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property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
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property OnDialectDowngradeWarning: TNotifyEvent read FOnDialectDowngradeWarning write FOnDialectDowngradeWarning;
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end;
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{ TIBTransaction }
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TTransactionAction = (TARollback, TACommit, TARollbackRetaining, TACommitRetaining);
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TIBTransaction = class(TComponent)
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private
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FAfterDelete: TNotifyEvent;
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FAfterEdit: TNotifyEvent;
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FAfterExecQuery: TNotifyEvent;
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FAfterInsert: TNotifyEvent;
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FAfterPost: TNotifyEvent;
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FAfterTransactionEnd: TNotifyEvent;
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FBeforeTransactionEnd: TNotifyEvent;
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FIBLoaded: Boolean;
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FCanTimeout : Boolean;
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FDatabases : TList;
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FOnStartTransaction: TNotifyEvent;
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FSQLObjects : TList;
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FDefaultDatabase : TIBDatabase;
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FHandle : TISC_TR_HANDLE;
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FHandleIsShared : Boolean;
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FOnIdleTimer : TNotifyEvent;
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FStreamedActive : Boolean;
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FTPB : PChar;
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FTPBLength : Short;
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FTimer : TFPTimer;
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FDefaultAction : TTransactionAction;
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FTRParams : TStrings;
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FTRParamsChanged : Boolean;
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FInEndTransaction : boolean;
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FEndAction : TTransactionAction;
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procedure DoBeforeTransactionEnd;
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procedure DoAfterTransactionEnd;
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procedure DoOnStartTransaction;
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procedure DoAfterExecQuery(Sender: TObject);
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procedure DoAfterEdit(Sender: TObject);
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procedure DoAfterDelete(Sender: TObject);
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procedure DoAfterInsert(Sender: TObject);
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procedure DoAfterPost(Sender: TObject);
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procedure EnsureNotInTransaction;
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procedure EndTransaction(Action: TTransactionAction; Force: Boolean);
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function GetDatabase(Index: Integer): TIBDatabase;
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function GetDatabaseCount: Integer;
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function GetSQLObject(Index: Integer): TIBBase;
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function GetSQLObjectCount: Integer;
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function GetInTransaction: Boolean;
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function GetIdleTimer: Integer;
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procedure BeforeDatabaseDisconnect(DB: TIBDatabase);
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procedure SetActive(Value: Boolean);
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procedure SetDefaultAction(Value: TTransactionAction);
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procedure SetDefaultDatabase(Value: TIBDatabase);
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procedure SetIdleTimer(Value: Integer);
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procedure SetTRParams(Value: TStrings);
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procedure TimeoutTransaction(Sender: TObject);
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procedure TRParamsChange(Sender: TObject);
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procedure TRParamsChanging(Sender: TObject);
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function AddSQLObject(ds: TIBBase): Integer;
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procedure RemoveSQLObject(Idx: Integer);
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procedure RemoveSQLObjects;
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protected
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procedure Loaded; override;
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procedure SetHandle(Value: TISC_TR_HANDLE);
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procedure Notification( AComponent: TComponent; Operation: TOperation); override;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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function Call(ErrCode: ISC_STATUS; RaiseError: Boolean): ISC_STATUS;
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procedure Commit;
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procedure CommitRetaining;
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procedure Rollback;
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procedure RollbackRetaining;
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procedure StartTransaction;
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procedure CheckInTransaction;
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procedure CheckNotInTransaction;
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function AddDatabase(db: TIBDatabase): Integer;
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function FindDatabase(db: TIBDatabase): Integer;
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function FindDefaultDatabase: TIBDatabase;
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function GetEndAction: TTransactionAction;
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procedure RemoveDatabase(Idx: Integer);
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procedure RemoveDatabases;
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procedure CheckDatabasesInList;
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property DatabaseCount: Integer read GetDatabaseCount;
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property Databases[Index: Integer]: TIBDatabase read GetDatabase;
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property SQLObjectCount: Integer read GetSQLObjectCount;
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property SQLObjects[Index: Integer]: TIBBase read GetSQLObject;
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property Handle: TISC_TR_HANDLE read FHandle;
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property HandleIsShared: Boolean read FHandleIsShared;
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property InTransaction: Boolean read GetInTransaction;
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property TPB: PChar read FTPB;
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property TPBLength: Short read FTPBLength;
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published
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property Active: Boolean read GetInTransaction write SetActive;
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property DefaultDatabase: TIBDatabase read FDefaultDatabase
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write SetDefaultDatabase;
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property IdleTimer: Integer read GetIdleTimer write SetIdleTimer default 0;
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property DefaultAction: TTransactionAction read FDefaultAction write SetDefaultAction default taCommit;
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property Params: TStrings read FTRParams write SetTRParams;
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property OnIdleTimer: TNotifyEvent read FOnIdleTimer write FOnIdleTimer;
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property BeforeTransactionEnd: TNotifyEvent read FBeforeTransactionEnd
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write FBeforeTransactionEnd;
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property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd
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write FAfterTransactionEnd;
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property OnStartTransaction: TNotifyEvent read FOnStartTransaction
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write FOnStartTransaction;
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property AfterExecQuery: TNotifyEvent read FAfterExecQuery
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write FAfterExecQuery;
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property AfterEdit: TNotifyEvent read FAfterEdit write FAfterEdit;
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property AfterDelete: TNotifyEvent read FAfterDelete write FAfterDelete;
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property AfterInsert: TNotifyEvent read FAfterInsert write FAfterInsert;
|
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property AfterPost: TNotifyEvent read FAfterPost write FAfterPost;
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end;
|
397 |
|
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TTransactionEndEvent = procedure(Sender:TObject; Action: TTransactionAction) of object;
|
399 |
TBeforeDatabaseConnectEvent = procedure (Sender: TObject; DBParams: TStrings;
|
400 |
var DBName: string) of object;
|
401 |
|
402 |
{ TIBBase }
|
403 |
|
404 |
{ Virtually all components in IB are "descendents" of TIBBase.
|
405 |
It is to more easily manage the database and transaction
|
406 |
connections. }
|
407 |
TIBBase = class(TObject)
|
408 |
protected
|
409 |
FBeforeDatabaseConnect: TBeforeDatabaseConnectEvent;
|
410 |
FDatabase: TIBDatabase;
|
411 |
FIndexInDatabase: Integer;
|
412 |
FTransaction: TIBTransaction;
|
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FIndexInTransaction: Integer;
|
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FOwner: TObject;
|
415 |
FBeforeDatabaseDisconnect: TNotifyEvent;
|
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FAfterDatabaseDisconnect: TNotifyEvent;
|
417 |
FAfterDatabaseConnect: TNotifyEvent;
|
418 |
FOnDatabaseFree: TNotifyEvent;
|
419 |
FBeforeTransactionEnd: TTransactionEndEvent;
|
420 |
FAfterTransactionEnd: TNotifyEvent;
|
421 |
FOnTransactionFree: TNotifyEvent;
|
422 |
|
423 |
procedure DoBeforeDatabaseConnect(DBParams: TStrings;
|
424 |
var DBName: string); virtual;
|
425 |
procedure DoAfterDatabaseConnect; virtual;
|
426 |
procedure DoBeforeDatabaseDisconnect; virtual;
|
427 |
procedure DoAfterDatabaseDisconnect; virtual;
|
428 |
procedure DoDatabaseFree; virtual;
|
429 |
procedure DoBeforeTransactionEnd(Action: TTransactionAction); virtual;
|
430 |
procedure DoAfterTransactionEnd; virtual;
|
431 |
procedure DoTransactionFree; virtual;
|
432 |
function GetDBHandle: PISC_DB_HANDLE; virtual;
|
433 |
function GetTRHandle: PISC_TR_HANDLE; virtual;
|
434 |
procedure SetDatabase(Value: TIBDatabase); virtual;
|
435 |
procedure SetTransaction(Value: TIBTransaction); virtual;
|
436 |
public
|
437 |
constructor Create(AOwner: TObject);
|
438 |
destructor Destroy; override;
|
439 |
procedure CheckDatabase; virtual;
|
440 |
procedure CheckTransaction; virtual;
|
441 |
procedure DoAfterExecQuery(Sender: TObject); virtual;
|
442 |
procedure DoAfterEdit(Sender: TObject); virtual;
|
443 |
procedure DoAfterDelete(Sender: TObject); virtual;
|
444 |
procedure DoAfterInsert(Sender: TObject); virtual;
|
445 |
procedure DoAfterPost(Sender: TObject); virtual;
|
446 |
function GetCharSetSize(CharSetID: integer): integer;
|
447 |
function GetDefaultCharSetSize: integer;
|
448 |
function GetCharSetName(CharSetID: integer): string;
|
449 |
function GetDefaultCharSetName: string;
|
450 |
procedure HandleException(Sender: TObject);
|
451 |
procedure SetCursor;
|
452 |
procedure RestoreCursor;
|
453 |
public
|
454 |
property BeforeDatabaseConnect: TBeforeDatabaseConnectEvent read FBeforeDatabaseConnect
|
455 |
write FBeforeDatabaseConnect;
|
456 |
property AfterDatabaseConnect: TNotifyEvent read FAfterDatabaseConnect
|
457 |
write FAfterDatabaseConnect;
|
458 |
property BeforeDatabaseDisconnect: TNotifyEvent read FBeforeDatabaseDisconnect
|
459 |
write FBeforeDatabaseDisconnect;
|
460 |
property AfterDatabaseDisconnect: TNotifyEvent read FAfterDatabaseDisconnect
|
461 |
write FAfterDatabaseDisconnect;
|
462 |
property OnDatabaseFree: TNotifyEvent read FOnDatabaseFree write FOnDatabaseFree;
|
463 |
property BeforeTransactionEnd: TTransactionEndEvent read FBeforeTransactionEnd write FBeforeTransactionEnd;
|
464 |
property AfterTransactionEnd: TNotifyEvent read FAfterTransactionEnd write FAfterTransactionEnd;
|
465 |
property OnTransactionFree: TNotifyEvent read FOnTransactionFree write FOnTransactionFree;
|
466 |
property Database: TIBDatabase read FDatabase
|
467 |
write SetDatabase;
|
468 |
property DBHandle: PISC_DB_HANDLE read GetDBHandle;
|
469 |
property Owner: TObject read FOwner;
|
470 |
property TRHandle: PISC_TR_HANDLE read GetTRHandle;
|
471 |
property Transaction: TIBTransaction read FTransaction
|
472 |
write SetTransaction;
|
473 |
end;
|
474 |
|
475 |
procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
|
476 |
procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
|
477 |
|
478 |
|
479 |
implementation
|
480 |
|
481 |
uses IBIntf, IBSQLMonitor, IBCustomDataSet, IBDatabaseInfo, IBSQL, IBUtils,
|
482 |
typInfo;
|
483 |
|
484 |
{ TIBDatabase }
|
485 |
|
486 |
constructor TIBDataBase.Create(AOwner: TComponent);
|
487 |
{$ifdef WINDOWS}
|
488 |
var acp: uint;
|
489 |
{$endif}
|
490 |
begin
|
491 |
inherited Create(AOwner);
|
492 |
FIBLoaded := False;
|
493 |
CheckIBLoaded;
|
494 |
FIBLoaded := True;
|
495 |
LoginPrompt := True;
|
496 |
FSQLObjects := TList.Create;
|
497 |
FTransactions := TList.Create;
|
498 |
FDBName := '';
|
499 |
FDBParams := TStringList.Create;
|
500 |
FSQLHourGlass := true;
|
501 |
if (AOwner <> nil) and
|
502 |
(AOwner is TCustomApplication) and
|
503 |
TCustomApplication(AOWner).ConsoleApplication then
|
504 |
LoginPrompt := false;
|
505 |
{$ifdef UNIX}
|
506 |
if csDesigning in ComponentState then
|
507 |
FDBParams.Add('lc_ctype=UTF8');
|
508 |
{$else}
|
509 |
{$ifdef WINDOWS}
|
510 |
if csDesigning in ComponentState then
|
511 |
begin
|
512 |
acp := GetACP;
|
513 |
if (acp >= 1250) and (acp <= 1254) then
|
514 |
FDBParams.Values['lc_ctype'] := Format('WIN%d',[acp]);
|
515 |
end;
|
516 |
{$endif}
|
517 |
{$endif}
|
518 |
FDBParamsChanged := True;
|
519 |
TStringList(FDBParams).OnChange := DBParamsChange;
|
520 |
TStringList(FDBParams).OnChanging := DBParamsChanging;
|
521 |
FDPB := nil;
|
522 |
FHandle := nil;
|
523 |
FUserNames := nil;
|
524 |
FInternalTransaction := TIBTransaction.Create(self);
|
525 |
FInternalTransaction.DefaultDatabase := Self;
|
526 |
FTimer := TFPTimer.Create(Self);
|
527 |
FTimer.Enabled := False;
|
528 |
FTimer.Interval := 0;
|
529 |
FTimer.OnTimer := TimeoutConnection;
|
530 |
FDBSQLDialect := 1;
|
531 |
FSQLDialect := 3;
|
532 |
FTraceFlags := [];
|
533 |
FDataSets := TList.Create;
|
534 |
CheckStreamConnect;
|
535 |
end;
|
536 |
|
537 |
destructor TIBDataBase.Destroy;
|
538 |
var
|
539 |
i: Integer;
|
540 |
begin
|
541 |
if FIBLoaded then
|
542 |
begin
|
543 |
IdleTimer := 0;
|
544 |
if FHandle <> nil then
|
545 |
ForceClose;
|
546 |
for i := 0 to FSQLObjects.Count - 1 do
|
547 |
if FSQLObjects[i] <> nil then
|
548 |
SQLObjects[i].DoDatabaseFree;
|
549 |
RemoveSQLObjects;
|
550 |
RemoveTransactions;
|
551 |
FInternalTransaction.Free;
|
552 |
FreeMem(FDPB);
|
553 |
FDPB := nil;
|
554 |
FDBParams.Free;
|
555 |
FSQLObjects.Free;
|
556 |
FUserNames.Free;
|
557 |
FTransactions.Free;
|
558 |
end;
|
559 |
FDataSets.Free;
|
560 |
inherited Destroy;
|
561 |
end;
|
562 |
|
563 |
function TIBDataBase.Call(ErrCode: ISC_STATUS; RaiseError: Boolean
|
564 |
): ISC_STATUS;
|
565 |
begin
|
566 |
result := ErrCode;
|
567 |
FCanTimeout := False;
|
568 |
if RaiseError and (ErrCode > 0) then
|
569 |
IBDataBaseError;
|
570 |
end;
|
571 |
|
572 |
procedure TIBDataBase.CheckActive;
|
573 |
begin
|
574 |
if StreamedConnected and (not Connected) then
|
575 |
Loaded;
|
576 |
if FHandle = nil then
|
577 |
IBError(ibxeDatabaseClosed, [nil]);
|
578 |
end;
|
579 |
|
580 |
procedure TIBDataBase.EnsureInactive;
|
581 |
begin
|
582 |
if csDesigning in ComponentState then
|
583 |
begin
|
584 |
if FHandle <> nil then
|
585 |
Close;
|
586 |
end
|
587 |
end;
|
588 |
|
589 |
procedure TIBDataBase.CheckInactive;
|
590 |
begin
|
591 |
if FHandle <> nil then
|
592 |
IBError(ibxeDatabaseOpen, [nil]);
|
593 |
end;
|
594 |
|
595 |
procedure TIBDataBase.CheckDatabaseName;
|
596 |
begin
|
597 |
if (FDBName = '') then
|
598 |
IBError(ibxeDatabaseNameMissing, [nil]);
|
599 |
end;
|
600 |
|
601 |
function TIBDataBase.AddSQLObject(ds: TIBBase): Integer;
|
602 |
begin
|
603 |
result := 0;
|
604 |
if (ds.Owner is TIBCustomDataSet) then
|
605 |
FDataSets.Add(ds.Owner);
|
606 |
while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
|
607 |
Inc(result);
|
608 |
if (result = FSQLObjects.Count) then
|
609 |
FSQLObjects.Add(ds)
|
610 |
else
|
611 |
FSQLObjects[result] := ds;
|
612 |
end;
|
613 |
|
614 |
function TIBDataBase.AddTransaction(TR: TIBTransaction): Integer;
|
615 |
begin
|
616 |
result := FindTransaction(TR);
|
617 |
if result <> -1 then
|
618 |
begin
|
619 |
result := -1;
|
620 |
exit;
|
621 |
end;
|
622 |
result := 0;
|
623 |
while (result < FTransactions.Count) and (FTransactions[result] <> nil) do
|
624 |
Inc(result);
|
625 |
if (result = FTransactions.Count) then
|
626 |
FTransactions.Add(TR)
|
627 |
else
|
628 |
FTransactions[result] := TR;
|
629 |
end;
|
630 |
|
631 |
procedure TIBDataBase.DoDisconnect;
|
632 |
begin
|
633 |
if Connected then
|
634 |
InternalClose(False);
|
635 |
FDBSQLDialect := 1;
|
636 |
SetLength(FCharSetSizes,0);
|
637 |
SetLength(FCharSetNames,0);
|
638 |
end;
|
639 |
|
640 |
procedure TIBDataBase.CreateDatabase;
|
641 |
var
|
642 |
tr_handle: TISC_TR_HANDLE;
|
643 |
begin
|
644 |
CheckInactive;
|
645 |
tr_handle := nil;
|
646 |
Call(
|
647 |
isc_dsql_execute_immediate(StatusVector, @FHandle, @tr_handle, 0,
|
648 |
PChar('CREATE DATABASE ''' + FDBName + ''' ' + {do not localize}
|
649 |
Params.Text), SQLDialect, nil),
|
650 |
True);
|
651 |
end;
|
652 |
|
653 |
procedure TIBDataBase.DropDatabase;
|
654 |
begin
|
655 |
CheckActive;
|
656 |
Call(isc_drop_database(StatusVector, @FHandle), True);
|
657 |
end;
|
658 |
|
659 |
procedure TIBDataBase.DBParamsChange(Sender: TObject);
|
660 |
begin
|
661 |
FDBParamsChanged := True;
|
662 |
end;
|
663 |
|
664 |
procedure TIBDataBase.DBParamsChanging(Sender: TObject);
|
665 |
begin
|
666 |
EnsureInactive;
|
667 |
CheckInactive;
|
668 |
end;
|
669 |
|
670 |
function TIBDataBase.FindTransaction(TR: TIBTransaction): Integer;
|
671 |
var
|
672 |
i: Integer;
|
673 |
begin
|
674 |
result := -1;
|
675 |
for i := 0 to FTransactions.Count - 1 do
|
676 |
if TR = Transactions[i] then
|
677 |
begin
|
678 |
result := i;
|
679 |
break;
|
680 |
end;
|
681 |
end;
|
682 |
|
683 |
function TIBDataBase.FindDefaultTransaction: TIBTransaction;
|
684 |
var
|
685 |
i: Integer;
|
686 |
begin
|
687 |
result := FDefaultTransaction;
|
688 |
if result = nil then
|
689 |
begin
|
690 |
for i := 0 to FTransactions.Count - 1 do
|
691 |
if (Transactions[i] <> nil) and
|
692 |
(TIBTransaction(Transactions[i]).DefaultDatabase = self) and
|
693 |
(TIBTransaction(Transactions[i]) <> FInternalTransaction) then
|
694 |
begin
|
695 |
result := TIBTransaction(Transactions[i]);
|
696 |
break;
|
697 |
end;
|
698 |
end;
|
699 |
end;
|
700 |
|
701 |
procedure TIBDataBase.ForceClose;
|
702 |
begin
|
703 |
if Connected then
|
704 |
InternalClose(True);
|
705 |
end;
|
706 |
|
707 |
function TIBDataBase.GetConnected: Boolean;
|
708 |
begin
|
709 |
result := FHandle <> nil;
|
710 |
end;
|
711 |
|
712 |
function TIBDataBase.GetSQLObject(Index: Integer): TIBBase;
|
713 |
begin
|
714 |
result := FSQLObjects[Index];
|
715 |
end;
|
716 |
|
717 |
function TIBDataBase.GetSQLObjectCount: Integer;
|
718 |
var
|
719 |
i: Integer;
|
720 |
begin
|
721 |
result := 0;
|
722 |
for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
|
723 |
Inc(result);
|
724 |
end;
|
725 |
|
726 |
function TIBDataBase.GetDBParamByDPB( const Idx: Integer): String;
|
727 |
var
|
728 |
ConstIdx, EqualsIdx: Integer;
|
729 |
begin
|
730 |
if (Idx > 0) and (Idx <= isc_dpb_last_dpb_constant) then
|
731 |
begin
|
732 |
ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
|
733 |
if ConstIdx = -1 then
|
734 |
result := ''
|
735 |
else
|
736 |
begin
|
737 |
result := Params[ConstIdx];
|
738 |
EqualsIdx := Pos('=', result); {mbcs ok}
|
739 |
if EqualsIdx = 0 then
|
740 |
result := ''
|
741 |
else
|
742 |
result := Copy(result, EqualsIdx + 1, Length(result));
|
743 |
end;
|
744 |
end
|
745 |
else
|
746 |
result := '';
|
747 |
end;
|
748 |
|
749 |
function TIBDataBase.GetIdleTimer: Integer;
|
750 |
begin
|
751 |
result := FTimer.Interval;
|
752 |
end;
|
753 |
|
754 |
function TIBDataBase.GetTransaction(Index: Integer): TIBTransaction;
|
755 |
begin
|
756 |
result := FTransactions[Index];
|
757 |
end;
|
758 |
|
759 |
function TIBDataBase.GetTransactionCount: Integer;
|
760 |
var
|
761 |
i: Integer;
|
762 |
begin
|
763 |
result := 0;
|
764 |
for i := 0 to FTransactions.Count - 1 do
|
765 |
if FTransactions[i] <> nil then
|
766 |
Inc(result);
|
767 |
end;
|
768 |
|
769 |
function TIBDataBase.IndexOfDBConst(st: String): Integer;
|
770 |
var
|
771 |
i, pos_of_str: Integer;
|
772 |
begin
|
773 |
result := -1;
|
774 |
for i := 0 to Params.Count - 1 do
|
775 |
begin
|
776 |
pos_of_str := Pos(st, AnsiLowerCase(Params[i])); {mbcs ok}
|
777 |
if (pos_of_str = 1) or (pos_of_str = Length(DPBPrefix) + 1) then
|
778 |
begin
|
779 |
result := i;
|
780 |
break;
|
781 |
end;
|
782 |
end;
|
783 |
end;
|
784 |
|
785 |
procedure TIBDataBase.InternalClose(Force: Boolean);
|
786 |
var
|
787 |
i: Integer;
|
788 |
begin
|
789 |
CheckActive;
|
790 |
{ Tell all connected transactions that we're disconnecting.
|
791 |
This is so transactions can commit/rollback, accordingly
|
792 |
}
|
793 |
for i := 0 to FTransactions.Count - 1 do
|
794 |
begin
|
795 |
try
|
796 |
if FTransactions[i] <> nil then
|
797 |
Transactions[i].BeforeDatabaseDisconnect(Self);
|
798 |
except
|
799 |
if not Force then
|
800 |
raise;
|
801 |
end;
|
802 |
end;
|
803 |
for i := 0 to FSQLObjects.Count - 1 do
|
804 |
begin
|
805 |
try
|
806 |
if FSQLObjects[i] <> nil then
|
807 |
SQLObjects[i].DoBeforeDatabaseDisconnect;
|
808 |
except
|
809 |
if not Force then
|
810 |
raise;
|
811 |
end;
|
812 |
end;
|
813 |
|
814 |
if (not HandleIsShared) and
|
815 |
(Call(isc_detach_database(StatusVector, @FHandle), False) > 0) and
|
816 |
(not Force) then
|
817 |
IBDataBaseError
|
818 |
else
|
819 |
begin
|
820 |
FHandle := nil;
|
821 |
FHandleIsShared := False;
|
822 |
end;
|
823 |
|
824 |
if not (csDesigning in ComponentState) then
|
825 |
MonitorHook.DBDisconnect(Self);
|
826 |
|
827 |
for i := 0 to FSQLObjects.Count - 1 do
|
828 |
if FSQLObjects[i] <> nil then
|
829 |
SQLObjects[i].DoAfterDatabaseDisconnect;
|
830 |
end;
|
831 |
|
832 |
procedure TIBDataBase.LoadCharSetInfo;
|
833 |
var Query: TIBSQL;
|
834 |
i: integer;
|
835 |
begin
|
836 |
if not FInternalTransaction.Active then
|
837 |
FInternalTransaction.StartTransaction;
|
838 |
Query := TIBSQL.Create(self);
|
839 |
try
|
840 |
Query.Database := Self;
|
841 |
Query.Transaction := FInternalTransaction;
|
842 |
Query.SQL.Text := 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER, RDB$CHARACTER_SET_NAME ' +
|
843 |
'From RDB$CHARACTER_SETS Order by 1 DESC'; {do not localize}
|
844 |
Query.Prepare;
|
845 |
Query.ExecQuery;
|
846 |
if not Query.EOF then
|
847 |
begin
|
848 |
SetLength(FCharSetSizes,Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger + 1);
|
849 |
SetLength(FCharSetNames,Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger + 1);
|
850 |
for i := 0 to Length(FCharSetSizes) - 1 do FCharSetSizes[i] := 1;
|
851 |
repeat
|
852 |
FCharSetSizes[Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger] :=
|
853 |
Query.FieldByName('RDB$BYTES_PER_CHARACTER').AsInteger;
|
854 |
FCharSetNames[Query.FieldByName('RDB$CHARACTER_SET_ID').AsInteger] :=
|
855 |
Query.FieldByName('RDB$CHARACTER_SET_NAME').AsString;
|
856 |
Query.Next;
|
857 |
until Query.EOF;
|
858 |
end;
|
859 |
finally
|
860 |
Query.free;
|
861 |
FInternalTransaction.Commit;
|
862 |
end;
|
863 |
end;
|
864 |
|
865 |
procedure TIBDataBase.CheckStreamConnect;
|
866 |
var
|
867 |
i: integer;
|
868 |
begin
|
869 |
try
|
870 |
if not (csDesigning in ComponentState) and StreamedConnected and (not Connected) then
|
871 |
begin
|
872 |
for i := 0 to FTransactions.Count - 1 do
|
873 |
if FTransactions[i] <> nil then
|
874 |
begin
|
875 |
with TIBTransaction(FTransactions[i]) do
|
876 |
if not Active then
|
877 |
if FStreamedActive and not InTransaction then
|
878 |
begin
|
879 |
StartTransaction;
|
880 |
FStreamedActive := False;
|
881 |
end;
|
882 |
end;
|
883 |
if (FDefaultTransaction <> nil) and
|
884 |
(FDefaultTransaction.FStreamedActive) and
|
885 |
(not FDefaultTransaction.InTransaction) then
|
886 |
FDefaultTransaction.StartTransaction;
|
887 |
FStreamedConnected := False;
|
888 |
end;
|
889 |
except
|
890 |
if csDesigning in ComponentState then
|
891 |
HandleException(Self)
|
892 |
else
|
893 |
raise;
|
894 |
end;
|
895 |
end;
|
896 |
|
897 |
procedure TIBDataBase.HandleException(Sender: TObject);
|
898 |
var aParent: TComponent;
|
899 |
begin
|
900 |
aParent := Owner;
|
901 |
while aParent <> nil do
|
902 |
begin
|
903 |
if aParent is TCustomApplication then
|
904 |
begin
|
905 |
TCustomApplication(aParent).HandleException(Sender);
|
906 |
Exit;
|
907 |
end;
|
908 |
aParent := aParent.Owner;
|
909 |
end;
|
910 |
SysUtils.ShowException(ExceptObject,ExceptAddr);
|
911 |
end;
|
912 |
|
913 |
procedure TIBDataBase.Notification(AComponent: TComponent;
|
914 |
Operation: TOperation);
|
915 |
var
|
916 |
i: Integer;
|
917 |
begin
|
918 |
inherited Notification( AComponent, Operation);
|
919 |
if (Operation = opRemove) and (AComponent = FDefaultTransaction) then
|
920 |
begin
|
921 |
i := FindTransaction(FDefaultTransaction);
|
922 |
if (i <> -1) then
|
923 |
RemoveTransaction(i);
|
924 |
FDefaultTransaction := nil;
|
925 |
end;
|
926 |
end;
|
927 |
|
928 |
function TIBDataBase.Login: Boolean;
|
929 |
var
|
930 |
IndexOfUser, IndexOfPassword: Integer;
|
931 |
Username, Password, OldPassword: String;
|
932 |
LoginParams: TStrings;
|
933 |
|
934 |
procedure HidePassword;
|
935 |
var
|
936 |
I: Integer;
|
937 |
IndexAt: Integer;
|
938 |
begin
|
939 |
IndexAt := 0;
|
940 |
for I := 0 to Params.Count -1 do
|
941 |
if Pos('password', LowerCase(Trim(Params.Names[i]))) = 1 then {mbcs ok}
|
942 |
begin
|
943 |
FHiddenPassword := Params.Values[Params.Names[i]];
|
944 |
IndexAt := I;
|
945 |
break;
|
946 |
end;
|
947 |
if IndexAt <> 0 then
|
948 |
Params.Delete(IndexAt);
|
949 |
end;
|
950 |
|
951 |
begin
|
952 |
Result := false;
|
953 |
if FLoginCalled then Exit;
|
954 |
FLoginCalled := true;
|
955 |
try
|
956 |
if Assigned(FOnLogin) and not (csDesigning in ComponentState) then
|
957 |
begin
|
958 |
result := True;
|
959 |
LoginParams := TStringList.Create;
|
960 |
try
|
961 |
LoginParams.Assign(Params);
|
962 |
FOnLogin(Self, LoginParams);
|
963 |
Params.Assign (LoginParams);
|
964 |
HidePassword;
|
965 |
finally
|
966 |
LoginParams.Free;
|
967 |
end;
|
968 |
end
|
969 |
else
|
970 |
if assigned(IBGUIInterface) then
|
971 |
begin
|
972 |
IndexOfUser := IndexOfDBConst(DPBConstantNames[isc_dpb_user_name]);
|
973 |
if IndexOfUser <> -1 then
|
974 |
Username := Copy(Params[IndexOfUser],
|
975 |
Pos('=', Params[IndexOfUser]) + 1, {mbcs ok}
|
976 |
Length(Params[IndexOfUser]));
|
977 |
IndexOfPassword := IndexOfDBConst(DPBConstantNames[isc_dpb_password]);
|
978 |
if IndexOfPassword <> -1 then
|
979 |
begin
|
980 |
Password := Copy(Params[IndexOfPassword],
|
981 |
Pos('=', Params[IndexOfPassword]) + 1, {mbcs ok}
|
982 |
Length(Params[IndexOfPassword]));
|
983 |
OldPassword := password;
|
984 |
end;
|
985 |
result := IBGUIInterface.LoginDialogEx(DatabaseName, Username, Password, False);
|
986 |
if result then
|
987 |
begin
|
988 |
if IndexOfUser = -1 then
|
989 |
Params.Add(DPBConstantNames[isc_dpb_user_name] + '=' + Username)
|
990 |
else
|
991 |
Params[IndexOfUser] := DPBConstantNames[isc_dpb_user_name] +
|
992 |
'=' + Username;
|
993 |
if (Password = OldPassword) then
|
994 |
FHiddenPassword := ''
|
995 |
else
|
996 |
begin
|
997 |
FHiddenPassword := Password;
|
998 |
if OldPassword <> '' then
|
999 |
HidePassword;
|
1000 |
end;
|
1001 |
end;
|
1002 |
end
|
1003 |
else
|
1004 |
if LoginPrompt then
|
1005 |
IBError(ibxeNoLoginDialog,[]);
|
1006 |
finally
|
1007 |
FLoginCalled := false
|
1008 |
end;
|
1009 |
end;
|
1010 |
|
1011 |
procedure TIBDataBase.DoConnect;
|
1012 |
var
|
1013 |
DPB: String;
|
1014 |
TempDBParams: TStrings;
|
1015 |
I: integer;
|
1016 |
aDBName: string;
|
1017 |
begin
|
1018 |
CheckInactive;
|
1019 |
CheckDatabaseName;
|
1020 |
if (not LoginPrompt) and (FHiddenPassword <> '') then
|
1021 |
begin
|
1022 |
FHiddenPassword := '';
|
1023 |
FDBParamsChanged := True;
|
1024 |
end;
|
1025 |
{ Use builtin login prompt if requested }
|
1026 |
if (LoginPrompt or (csDesigning in ComponentState)) and not Login then
|
1027 |
IBError(ibxeOperationCancelled, [nil]);
|
1028 |
|
1029 |
TempDBParams := TStringList.Create;
|
1030 |
try
|
1031 |
TempDBParams.Assign(FDBParams);
|
1032 |
aDBName := FDBName;
|
1033 |
{Opportunity to override defaults}
|
1034 |
for i := 0 to FSQLObjects.Count - 1 do
|
1035 |
begin
|
1036 |
if FSQLObjects[i] <> nil then
|
1037 |
SQLObjects[i].DoBeforeDatabaseConnect(TempDBParams,aDBName);
|
1038 |
end;
|
1039 |
|
1040 |
{ Generate a new DPB if necessary }
|
1041 |
if (FDBParamsChanged or (TempDBParams.Text <> FDBParams.Text)) then
|
1042 |
begin
|
1043 |
FDBParamsChanged := False;
|
1044 |
if (not LoginPrompt and not (csDesigning in ComponentState)) or (FHiddenPassword = '') then
|
1045 |
GenerateDPB(TempDBParams, DPB, FDPBLength)
|
1046 |
else
|
1047 |
begin
|
1048 |
TempDBParams.Add('password=' + FHiddenPassword);
|
1049 |
GenerateDPB(TempDBParams, DPB, FDPBLength);
|
1050 |
end;
|
1051 |
IBAlloc(FDPB, 0, FDPBLength);
|
1052 |
Move(DPB[1], FDPB[0], FDPBLength);
|
1053 |
end;
|
1054 |
finally
|
1055 |
TempDBParams.Free;
|
1056 |
end;
|
1057 |
if Call(isc_attach_database(StatusVector, Length(aDBName),
|
1058 |
PChar(aDBName), @FHandle,
|
1059 |
FDPBLength, FDPB), False) > 0 then
|
1060 |
begin
|
1061 |
FHandle := nil;
|
1062 |
IBDataBaseError;
|
1063 |
end;
|
1064 |
if not (csDesigning in ComponentState) then
|
1065 |
FDBName := aDBName; {Synchronise at run time}
|
1066 |
FDBSQLDialect := GetDBSQLDialect;
|
1067 |
ValidateClientSQLDialect;
|
1068 |
for i := 0 to FSQLObjects.Count - 1 do
|
1069 |
begin
|
1070 |
if FSQLObjects[i] <> nil then
|
1071 |
SQLObjects[i].DoAfterDatabaseConnect;
|
1072 |
end;
|
1073 |
if not (csDesigning in ComponentState) then
|
1074 |
MonitorHook.DBConnect(Self);
|
1075 |
LoadCharSetInfo;
|
1076 |
end;
|
1077 |
|
1078 |
procedure TIBDataBase.RemoveSQLObject(Idx: Integer);
|
1079 |
var
|
1080 |
ds: TIBBase;
|
1081 |
begin
|
1082 |
if (Idx >= 0) and (FSQLObjects[Idx] <> nil) then
|
1083 |
begin
|
1084 |
ds := SQLObjects[Idx];
|
1085 |
FSQLObjects[Idx] := nil;
|
1086 |
ds.Database := nil;
|
1087 |
if (ds.owner is TDataSet) then
|
1088 |
FDataSets.Remove(TDataSet(ds.Owner));
|
1089 |
end;
|
1090 |
end;
|
1091 |
|
1092 |
procedure TIBDataBase.RemoveSQLObjects;
|
1093 |
var
|
1094 |
i: Integer;
|
1095 |
begin
|
1096 |
for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
|
1097 |
begin
|
1098 |
RemoveSQLObject(i);
|
1099 |
if (TIBBase(FSQLObjects[i]).owner is TDataSet) then
|
1100 |
FDataSets.Remove(TDataSet(TIBBase(FSQLObjects[i]).owner));
|
1101 |
end;
|
1102 |
end;
|
1103 |
|
1104 |
procedure TIBDataBase.RemoveTransaction(Idx: Integer);
|
1105 |
var
|
1106 |
TR: TIBTransaction;
|
1107 |
begin
|
1108 |
if ((Idx >= 0) and (FTransactions[Idx] <> nil)) then
|
1109 |
begin
|
1110 |
TR := Transactions[Idx];
|
1111 |
FTransactions[Idx] := nil;
|
1112 |
TR.RemoveDatabase(TR.FindDatabase(Self));
|
1113 |
if TR = FDefaultTransaction then
|
1114 |
FDefaultTransaction := nil;
|
1115 |
end;
|
1116 |
end;
|
1117 |
|
1118 |
procedure TIBDataBase.RemoveTransactions;
|
1119 |
var
|
1120 |
i: Integer;
|
1121 |
begin
|
1122 |
for i := 0 to FTransactions.Count - 1 do if FTransactions[i] <> nil then
|
1123 |
RemoveTransaction(i);
|
1124 |
end;
|
1125 |
|
1126 |
procedure TIBDataBase.SetDatabaseName( const Value: TIBFileName);
|
1127 |
begin
|
1128 |
if FDBName <> Value then
|
1129 |
begin
|
1130 |
EnsureInactive;
|
1131 |
CheckInactive;
|
1132 |
FDBName := Value;
|
1133 |
end;
|
1134 |
end;
|
1135 |
|
1136 |
procedure TIBDataBase.SetDBParamByDPB( const Idx: Integer; Value: String);
|
1137 |
var
|
1138 |
ConstIdx: Integer;
|
1139 |
begin
|
1140 |
ConstIdx := IndexOfDBConst(DPBConstantNames[Idx]);
|
1141 |
if (Value = '') then
|
1142 |
begin
|
1143 |
if ConstIdx <> -1 then
|
1144 |
Params.Delete(ConstIdx);
|
1145 |
end
|
1146 |
else
|
1147 |
begin
|
1148 |
if (ConstIdx = -1) then
|
1149 |
Params.Add(DPBConstantNames[Idx] + '=' + Value)
|
1150 |
else
|
1151 |
Params[ConstIdx] := DPBConstantNames[Idx] + '=' + Value;
|
1152 |
end;
|
1153 |
end;
|
1154 |
|
1155 |
procedure TIBDataBase.SetDBParams(Value: TStrings);
|
1156 |
begin
|
1157 |
FDBParams.Assign(Value);
|
1158 |
end;
|
1159 |
|
1160 |
procedure TIBDataBase.SetDefaultTransaction(Value: TIBTransaction);
|
1161 |
var
|
1162 |
i: Integer;
|
1163 |
begin
|
1164 |
if (FDefaultTransaction <> nil) and (FDefaultTransaction <> Value) then
|
1165 |
begin
|
1166 |
i := FindTransaction(FDefaultTransaction);
|
1167 |
if (i <> -1) and (FDefaultTransaction.DefaultDatabase <> self) then
|
1168 |
RemoveTransaction(i);
|
1169 |
end;
|
1170 |
if (Value <> nil) and (FDefaultTransaction <> Value) then
|
1171 |
begin
|
1172 |
Value.AddDatabase(Self);
|
1173 |
AddTransaction(Value);
|
1174 |
end;
|
1175 |
FDefaultTransaction := Value;
|
1176 |
end;
|
1177 |
|
1178 |
procedure TIBDataBase.SetHandle(Value: TISC_DB_HANDLE);
|
1179 |
begin
|
1180 |
if HandleIsShared then
|
1181 |
Close
|
1182 |
else
|
1183 |
CheckInactive;
|
1184 |
FHandle := Value;
|
1185 |
FHandleIsShared := (Value <> nil);
|
1186 |
end;
|
1187 |
|
1188 |
procedure TIBDataBase.SetIdleTimer(Value: Integer);
|
1189 |
begin
|
1190 |
if Value < 0 then
|
1191 |
IBError(ibxeTimeoutNegative, [nil])
|
1192 |
else
|
1193 |
if (Value = 0) then
|
1194 |
begin
|
1195 |
FTimer.Enabled := False;
|
1196 |
FTimer.Interval := 0;
|
1197 |
end
|
1198 |
else
|
1199 |
if (Value > 0) then
|
1200 |
begin
|
1201 |
FTimer.Interval := Value;
|
1202 |
if not (csDesigning in ComponentState) then
|
1203 |
FTimer.Enabled := True;
|
1204 |
end;
|
1205 |
end;
|
1206 |
|
1207 |
function TIBDataBase.TestConnected: Boolean;
|
1208 |
var
|
1209 |
DatabaseInfo: TIBDatabaseInfo;
|
1210 |
begin
|
1211 |
result := Connected;
|
1212 |
if result then
|
1213 |
begin
|
1214 |
DatabaseInfo := TIBDatabaseInfo.Create(self);
|
1215 |
try
|
1216 |
DatabaseInfo.Database := self;
|
1217 |
{ poke the server to see if connected }
|
1218 |
if DatabaseInfo.BaseLevel = 0 then ;
|
1219 |
DatabaseInfo.Free;
|
1220 |
except
|
1221 |
ForceClose;
|
1222 |
result := False;
|
1223 |
DatabaseInfo.Free;
|
1224 |
end;
|
1225 |
end;
|
1226 |
end;
|
1227 |
|
1228 |
procedure TIBDataBase.TimeoutConnection(Sender: TObject);
|
1229 |
begin
|
1230 |
if Connected then
|
1231 |
begin
|
1232 |
if FCanTimeout then
|
1233 |
begin
|
1234 |
ForceClose;
|
1235 |
if Assigned(FOnIdleTimer) then
|
1236 |
FOnIdleTimer(Self);
|
1237 |
end
|
1238 |
else
|
1239 |
FCanTimeout := True;
|
1240 |
end;
|
1241 |
end;
|
1242 |
|
1243 |
function TIBDataBase.GetIsReadOnly: Boolean;
|
1244 |
var
|
1245 |
DatabaseInfo: TIBDatabaseInfo;
|
1246 |
begin
|
1247 |
DatabaseInfo := TIBDatabaseInfo.Create(self);
|
1248 |
DatabaseInfo.Database := self;
|
1249 |
if (DatabaseInfo.ODSMajorVersion < 10) then
|
1250 |
result := false
|
1251 |
else
|
1252 |
begin
|
1253 |
if (DatabaseInfo.ReadOnly = 0) then
|
1254 |
result := false
|
1255 |
else
|
1256 |
result := true;
|
1257 |
end;
|
1258 |
DatabaseInfo.Free;
|
1259 |
end;
|
1260 |
|
1261 |
function TIBDataBase.GetSQLDialect: Integer;
|
1262 |
begin
|
1263 |
Result := FSQLDialect;
|
1264 |
end;
|
1265 |
|
1266 |
|
1267 |
procedure TIBDataBase.SetSQLDialect( const Value: Integer);
|
1268 |
begin
|
1269 |
if (Value < 1) then IBError(ibxeSQLDialectInvalid, [nil]);
|
1270 |
if ((FHandle = nil) or (Value <= FDBSQLDialect)) then
|
1271 |
FSQLDialect := Value
|
1272 |
else
|
1273 |
IBError(ibxeSQLDialectInvalid, [nil]);
|
1274 |
end;
|
1275 |
|
1276 |
function TIBDataBase.GetDBSQLDialect: Integer;
|
1277 |
var
|
1278 |
DatabaseInfo: TIBDatabaseInfo;
|
1279 |
begin
|
1280 |
DatabaseInfo := TIBDatabaseInfo.Create(self);
|
1281 |
DatabaseInfo.Database := self;
|
1282 |
result := DatabaseInfo.DBSQLDialect;
|
1283 |
DatabaseInfo.Free;
|
1284 |
end;
|
1285 |
|
1286 |
procedure TIBDataBase.ValidateClientSQLDialect;
|
1287 |
begin
|
1288 |
if (FDBSQLDialect < FSQLDialect) then
|
1289 |
begin
|
1290 |
FSQLDialect := FDBSQLDialect;
|
1291 |
if Assigned (FOnDialectDowngradeWarning) then
|
1292 |
FOnDialectDowngradeWarning(self);
|
1293 |
end;
|
1294 |
end;
|
1295 |
|
1296 |
procedure TIBDataBase.ApplyUpdates( const DataSets: array of TDataSet);
|
1297 |
var
|
1298 |
I: Integer;
|
1299 |
DS: TIBCustomDataSet;
|
1300 |
TR: TIBTransaction;
|
1301 |
begin
|
1302 |
TR := nil;
|
1303 |
for I := 0 to High(DataSets) do
|
1304 |
begin
|
1305 |
DS := TIBCustomDataSet(DataSets[I]);
|
1306 |
if DS.Database <> Self then
|
1307 |
IBError(ibxeUpdateWrongDB, [nil]);
|
1308 |
if TR = nil then
|
1309 |
TR := DS.Transaction;
|
1310 |
if (DS.Transaction <> TR) or (TR = nil) then
|
1311 |
IBError(ibxeUpdateWrongTR, [nil]);
|
1312 |
end;
|
1313 |
TR.CheckInTransaction;
|
1314 |
for I := 0 to High(DataSets) do
|
1315 |
begin
|
1316 |
DS := TIBCustomDataSet(DataSets[I]);
|
1317 |
DS.ApplyUpdates;
|
1318 |
end;
|
1319 |
TR.CommitRetaining;
|
1320 |
end;
|
1321 |
|
1322 |
procedure TIBDataBase.CloseDataSets;
|
1323 |
var
|
1324 |
i: Integer;
|
1325 |
begin
|
1326 |
for i := 0 to DataSetCount - 1 do
|
1327 |
if (DataSets[i] <> nil) then
|
1328 |
DataSets[i].close;
|
1329 |
end;
|
1330 |
|
1331 |
function TIBDataBase.GetDataset(Index: longint): TDataset;
|
1332 |
begin
|
1333 |
if (Index >= 0) and (Index < FDataSets.Count) then
|
1334 |
Result := TDataSet(FDataSets[Index])
|
1335 |
else
|
1336 |
raise Exception.Create('Invalid Index to DataSets');
|
1337 |
end;
|
1338 |
|
1339 |
function TIBDataBase.GetDataSetCount: Longint;
|
1340 |
begin
|
1341 |
Result := FDataSets.Count;
|
1342 |
end;
|
1343 |
|
1344 |
procedure TIBDataBase.ReadState(Reader: TReader);
|
1345 |
begin
|
1346 |
FDBParams.Clear;
|
1347 |
inherited ReadState(Reader);
|
1348 |
end;
|
1349 |
|
1350 |
procedure TIBDataBase.SetConnected(Value: boolean);
|
1351 |
begin
|
1352 |
if StreamedConnected and not AllowStreamedConnected then
|
1353 |
begin
|
1354 |
StreamedConnected := false;
|
1355 |
Value := false
|
1356 |
end;
|
1357 |
inherited SetConnected(Value);
|
1358 |
end;
|
1359 |
|
1360 |
procedure TIBDataBase.GetFieldNames( const TableName: string; List: TStrings);
|
1361 |
var
|
1362 |
Query: TIBSQL;
|
1363 |
begin
|
1364 |
if TableName = '' then
|
1365 |
IBError(ibxeNoTableName, [nil]);
|
1366 |
if not Connected then
|
1367 |
Open;
|
1368 |
if not FInternalTransaction.Active then
|
1369 |
FInternalTransaction.StartTransaction;
|
1370 |
Query := TIBSQL.Create(self);
|
1371 |
try
|
1372 |
Query.GoToFirstRecordOnExecute := False;
|
1373 |
Query.Database := Self;
|
1374 |
Query.Transaction := FInternalTransaction;
|
1375 |
Query.SQL.Text := 'Select R.RDB$FIELD_NAME ' + {do not localize}
|
1376 |
'from RDB$RELATION_FIELDS R, RDB$FIELDS F ' + {do not localize}
|
1377 |
'where R.RDB$RELATION_NAME = ' + {do not localize}
|
1378 |
'''' +
|
1379 |
FormatIdentifierValue(SQLDialect, TableName) +
|
1380 |
''' ' +
|
1381 |
'and R.RDB$FIELD_SOURCE = F.RDB$FIELD_NAME '; {do not localize}
|
1382 |
Query.Prepare;
|
1383 |
Query.ExecQuery;
|
1384 |
with List do
|
1385 |
begin
|
1386 |
BeginUpdate;
|
1387 |
try
|
1388 |
Clear;
|
1389 |
while (not Query.EOF) and (Query.Next <> nil) do
|
1390 |
List.Add(TrimRight(Query.Current.ByName('RDB$FIELD_NAME').AsString)); {do not localize}
|
1391 |
finally
|
1392 |
EndUpdate;
|
1393 |
end;
|
1394 |
end;
|
1395 |
finally
|
1396 |
Query.free;
|
1397 |
FInternalTransaction.Commit;
|
1398 |
end;
|
1399 |
end;
|
1400 |
|
1401 |
procedure TIBDataBase.GetTableNames(List: TStrings; SystemTables: Boolean);
|
1402 |
var
|
1403 |
Query : TIBSQL;
|
1404 |
begin
|
1405 |
if not (csReading in ComponentState) then
|
1406 |
begin
|
1407 |
if not Connected then
|
1408 |
Open;
|
1409 |
if not FInternalTransaction.Active then
|
1410 |
FInternalTransaction.StartTransaction;
|
1411 |
Query := TIBSQL.Create(self);
|
1412 |
try
|
1413 |
Query.GoToFirstRecordOnExecute := False;
|
1414 |
Query.Database := Self;
|
1415 |
Query.Transaction := FInternalTransaction;
|
1416 |
if SystemTables then
|
1417 |
Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
|
1418 |
' where RDB$VIEW_BLR is NULL' {do not localize}
|
1419 |
else
|
1420 |
Query.SQL.Text := 'Select RDB$RELATION_NAME from RDB$RELATIONS' + {do not localize}
|
1421 |
' where RDB$VIEW_BLR is NULL and RDB$SYSTEM_FLAG = 0'; {do not localize}
|
1422 |
Query.Prepare;
|
1423 |
Query.ExecQuery;
|
1424 |
with List do
|
1425 |
begin
|
1426 |
BeginUpdate;
|
1427 |
try
|
1428 |
Clear;
|
1429 |
while (not Query.EOF) and (Query.Next <> nil) do
|
1430 |
List.Add(TrimRight(Query.Current[0].AsString));
|
1431 |
finally
|
1432 |
EndUpdate;
|
1433 |
end;
|
1434 |
end;
|
1435 |
finally
|
1436 |
Query.Free;
|
1437 |
FInternalTransaction.Commit;
|
1438 |
end;
|
1439 |
end;
|
1440 |
end;
|
1441 |
|
1442 |
{ TIBTransaction }
|
1443 |
|
1444 |
constructor TIBTransaction.Create(AOwner: TComponent);
|
1445 |
begin
|
1446 |
inherited Create(AOwner);
|
1447 |
FIBLoaded := False;
|
1448 |
CheckIBLoaded;
|
1449 |
FIBLoaded := True;
|
1450 |
CheckIBLoaded;
|
1451 |
FDatabases := TList.Create;
|
1452 |
FSQLObjects := TList.Create;
|
1453 |
FHandle := nil;
|
1454 |
FTPB := nil;
|
1455 |
FTPBLength := 0;
|
1456 |
FTRParams := TStringList.Create;
|
1457 |
FTRParamsChanged := True;
|
1458 |
TStringList(FTRParams).OnChange := TRParamsChange;
|
1459 |
TStringList(FTRParams).OnChanging := TRParamsChanging;
|
1460 |
FTimer := TFPTimer.Create(Self);
|
1461 |
FTimer.Enabled := False;
|
1462 |
FTimer.Interval := 0;
|
1463 |
FTimer.OnTimer := TimeoutTransaction;
|
1464 |
FDefaultAction := taCommit;
|
1465 |
end;
|
1466 |
|
1467 |
destructor TIBTransaction.Destroy;
|
1468 |
var
|
1469 |
i: Integer;
|
1470 |
begin
|
1471 |
if FIBLoaded then
|
1472 |
begin
|
1473 |
if InTransaction then
|
1474 |
EndTransaction(FDefaultAction, True);
|
1475 |
for i := 0 to FSQLObjects.Count - 1 do
|
1476 |
if FSQLObjects[i] <> nil then
|
1477 |
SQLObjects[i].DoTransactionFree;
|
1478 |
RemoveSQLObjects;
|
1479 |
RemoveDatabases;
|
1480 |
FreeMem(FTPB);
|
1481 |
FTPB := nil;
|
1482 |
FTRParams.Free;
|
1483 |
FSQLObjects.Free;
|
1484 |
FDatabases.Free;
|
1485 |
end;
|
1486 |
inherited Destroy;
|
1487 |
end;
|
1488 |
|
1489 |
function TIBTransaction.Call(ErrCode: ISC_STATUS;
|
1490 |
RaiseError: Boolean): ISC_STATUS;
|
1491 |
var
|
1492 |
i: Integer;
|
1493 |
begin
|
1494 |
result := ErrCode;
|
1495 |
for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
|
1496 |
Databases[i].FCanTimeout := False;
|
1497 |
FCanTimeout := False;
|
1498 |
if RaiseError and (result > 0) then
|
1499 |
IBDataBaseError;
|
1500 |
end;
|
1501 |
|
1502 |
procedure TIBTransaction.CheckDatabasesInList;
|
1503 |
begin
|
1504 |
if GetDatabaseCount = 0 then
|
1505 |
IBError(ibxeNoDatabasesInTransaction, [nil]);
|
1506 |
end;
|
1507 |
|
1508 |
procedure TIBTransaction.CheckInTransaction;
|
1509 |
begin
|
1510 |
if FStreamedActive and (not InTransaction) then
|
1511 |
Loaded;
|
1512 |
if (FHandle = nil) then
|
1513 |
IBError(ibxeNotInTransaction, [nil]);
|
1514 |
end;
|
1515 |
|
1516 |
procedure TIBTransaction.DoBeforeTransactionEnd;
|
1517 |
begin
|
1518 |
if Assigned(FBeforeTransactionEnd) then
|
1519 |
FBeforeTransactionEnd(self);
|
1520 |
end;
|
1521 |
|
1522 |
procedure TIBTransaction.DoAfterTransactionEnd;
|
1523 |
begin
|
1524 |
if Assigned(FAfterTransactionEnd) then
|
1525 |
FAfterTransactionEnd(self);
|
1526 |
end;
|
1527 |
|
1528 |
procedure TIBTransaction.DoOnStartTransaction;
|
1529 |
begin
|
1530 |
if assigned(FOnStartTransaction) then
|
1531 |
OnStartTransaction(self);
|
1532 |
end;
|
1533 |
|
1534 |
procedure TIBTransaction.DoAfterExecQuery(Sender: TObject);
|
1535 |
begin
|
1536 |
if assigned(FAfterExecQuery) then
|
1537 |
AfterExecQuery(Sender);
|
1538 |
end;
|
1539 |
|
1540 |
procedure TIBTransaction.DoAfterEdit(Sender: TObject);
|
1541 |
begin
|
1542 |
if assigned(FAfterEdit) then
|
1543 |
AfterEdit(Sender);
|
1544 |
end;
|
1545 |
|
1546 |
procedure TIBTransaction.DoAfterDelete(Sender: TObject);
|
1547 |
begin
|
1548 |
if assigned(FAfterDelete) then
|
1549 |
AfterDelete(Sender);
|
1550 |
end;
|
1551 |
|
1552 |
procedure TIBTransaction.DoAfterInsert(Sender: TObject);
|
1553 |
begin
|
1554 |
if assigned(FAfterInsert) then
|
1555 |
AfterInsert(Sender);
|
1556 |
end;
|
1557 |
|
1558 |
procedure TIBTransaction.DoAfterPost(Sender: TObject);
|
1559 |
begin
|
1560 |
if assigned(FAfterPost) then
|
1561 |
AfterPost(Sender);
|
1562 |
end;
|
1563 |
|
1564 |
procedure TIBTransaction.EnsureNotInTransaction;
|
1565 |
begin
|
1566 |
if csDesigning in ComponentState then
|
1567 |
begin
|
1568 |
if FHandle <> nil then
|
1569 |
Rollback;
|
1570 |
end;
|
1571 |
end;
|
1572 |
|
1573 |
procedure TIBTransaction.CheckNotInTransaction;
|
1574 |
begin
|
1575 |
if (FHandle <> nil) then
|
1576 |
IBError(ibxeInTransaction, [nil]);
|
1577 |
end;
|
1578 |
|
1579 |
function TIBTransaction.AddDatabase(db: TIBDatabase): Integer;
|
1580 |
var
|
1581 |
i: Integer;
|
1582 |
NilFound: Boolean;
|
1583 |
begin
|
1584 |
i := FindDatabase(db);
|
1585 |
if i <> -1 then
|
1586 |
begin
|
1587 |
result := i;
|
1588 |
exit;
|
1589 |
end;
|
1590 |
NilFound := False;
|
1591 |
i := 0;
|
1592 |
while (not NilFound) and (i < FDatabases.Count) do
|
1593 |
begin
|
1594 |
NilFound := (FDatabases[i] = nil);
|
1595 |
if (not NilFound) then
|
1596 |
Inc(i);
|
1597 |
end;
|
1598 |
if (NilFound) then
|
1599 |
begin
|
1600 |
FDatabases[i] := db;
|
1601 |
result := i;
|
1602 |
end
|
1603 |
else
|
1604 |
begin
|
1605 |
result := FDatabases.Count;
|
1606 |
FDatabases.Add(db);
|
1607 |
end;
|
1608 |
end;
|
1609 |
|
1610 |
function TIBTransaction.AddSQLObject(ds: TIBBase): Integer;
|
1611 |
begin
|
1612 |
result := 0;
|
1613 |
while (result < FSQLObjects.Count) and (FSQLObjects[result] <> nil) do
|
1614 |
Inc(result);
|
1615 |
if (result = FSQLObjects.Count) then
|
1616 |
FSQLObjects.Add(ds)
|
1617 |
else
|
1618 |
FSQLObjects[result] := ds;
|
1619 |
end;
|
1620 |
|
1621 |
procedure TIBTransaction.Commit;
|
1622 |
begin
|
1623 |
EndTransaction(TACommit, False);
|
1624 |
end;
|
1625 |
|
1626 |
procedure TIBTransaction.CommitRetaining;
|
1627 |
begin
|
1628 |
EndTransaction(TACommitRetaining, False);
|
1629 |
end;
|
1630 |
|
1631 |
procedure TIBTransaction.EndTransaction(Action: TTransactionAction;
|
1632 |
Force: Boolean);
|
1633 |
var
|
1634 |
status: ISC_STATUS;
|
1635 |
i: Integer;
|
1636 |
begin
|
1637 |
CheckInTransaction;
|
1638 |
if FInEndTransaction then Exit;
|
1639 |
FInEndTransaction := true;
|
1640 |
FEndAction := Action;
|
1641 |
try
|
1642 |
case Action of
|
1643 |
TARollback, TACommit:
|
1644 |
begin
|
1645 |
if (HandleIsShared) and
|
1646 |
(Action <> FDefaultAction) and
|
1647 |
(not Force) then
|
1648 |
IBError(ibxeCantEndSharedTransaction, [nil]);
|
1649 |
DoBeforeTransactionEnd;
|
1650 |
for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
|
1651 |
SQLObjects[i].DoBeforeTransactionEnd(Action);
|
1652 |
if InTransaction then
|
1653 |
begin
|
1654 |
if HandleIsShared then
|
1655 |
begin
|
1656 |
FHandle := nil;
|
1657 |
FHandleIsShared := False;
|
1658 |
status := 0;
|
1659 |
end
|
1660 |
else
|
1661 |
if (Action = TARollback) then
|
1662 |
status := Call(isc_rollback_transaction(StatusVector, @FHandle), False)
|
1663 |
else
|
1664 |
status := Call(isc_commit_transaction(StatusVector, @FHandle), False);
|
1665 |
if ((Force) and (status > 0)) then
|
1666 |
status := Call(isc_rollback_transaction(StatusVector, @FHandle), False);
|
1667 |
if Force then
|
1668 |
FHandle := nil
|
1669 |
else
|
1670 |
if (status > 0) then
|
1671 |
IBDataBaseError;
|
1672 |
for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
|
1673 |
SQLObjects[i].DoAfterTransactionEnd;
|
1674 |
DoAfterTransactionEnd;
|
1675 |
end;
|
1676 |
end;
|
1677 |
TACommitRetaining:
|
1678 |
Call(isc_commit_retaining(StatusVector, @FHandle), True);
|
1679 |
TARollbackRetaining:
|
1680 |
Call(isc_rollback_retaining(StatusVector, @FHandle), True);
|
1681 |
end;
|
1682 |
if not (csDesigning in ComponentState) then
|
1683 |
begin
|
1684 |
case Action of
|
1685 |
TACommit:
|
1686 |
MonitorHook.TRCommit(Self);
|
1687 |
TARollback:
|
1688 |
MonitorHook.TRRollback(Self);
|
1689 |
TACommitRetaining:
|
1690 |
MonitorHook.TRCommitRetaining(Self);
|
1691 |
TARollbackRetaining:
|
1692 |
MonitorHook.TRRollbackRetaining(Self);
|
1693 |
end;
|
1694 |
end;
|
1695 |
finally
|
1696 |
FInEndTransaction := false
|
1697 |
end;
|
1698 |
end;
|
1699 |
|
1700 |
function TIBTransaction.GetDatabase(Index: Integer): TIBDatabase;
|
1701 |
begin
|
1702 |
result := FDatabases[Index];
|
1703 |
end;
|
1704 |
|
1705 |
function TIBTransaction.GetDatabaseCount: Integer;
|
1706 |
var
|
1707 |
i, Cnt: Integer;
|
1708 |
begin
|
1709 |
result := 0;
|
1710 |
Cnt := FDatabases.Count - 1;
|
1711 |
for i := 0 to Cnt do if FDatabases[i] <> nil then
|
1712 |
Inc(result);
|
1713 |
end;
|
1714 |
|
1715 |
function TIBTransaction.GetSQLObject(Index: Integer): TIBBase;
|
1716 |
begin
|
1717 |
result := FSQLObjects[Index];
|
1718 |
end;
|
1719 |
|
1720 |
function TIBTransaction.GetSQLObjectCount: Integer;
|
1721 |
var
|
1722 |
i, Cnt: Integer;
|
1723 |
begin
|
1724 |
result := 0;
|
1725 |
Cnt := FSQLObjects.Count - 1;
|
1726 |
for i := 0 to Cnt do if FSQLObjects[i] <> nil then
|
1727 |
Inc(result);
|
1728 |
end;
|
1729 |
|
1730 |
function TIBTransaction.GetInTransaction: Boolean;
|
1731 |
begin
|
1732 |
result := (FHandle <> nil);
|
1733 |
end;
|
1734 |
|
1735 |
function TIBTransaction.FindDatabase(db: TIBDatabase): Integer;
|
1736 |
var
|
1737 |
i: Integer;
|
1738 |
begin
|
1739 |
result := -1;
|
1740 |
for i := 0 to FDatabases.Count - 1 do
|
1741 |
if db = TIBDatabase(FDatabases[i]) then
|
1742 |
begin
|
1743 |
result := i;
|
1744 |
break;
|
1745 |
end;
|
1746 |
end;
|
1747 |
|
1748 |
function TIBTransaction.FindDefaultDatabase: TIBDatabase;
|
1749 |
var
|
1750 |
i: Integer;
|
1751 |
begin
|
1752 |
result := FDefaultDatabase;
|
1753 |
if result = nil then
|
1754 |
begin
|
1755 |
for i := 0 to FDatabases.Count - 1 do
|
1756 |
if (TIBDatabase(FDatabases[i]) <> nil) and
|
1757 |
(TIBDatabase(FDatabases[i]).DefaultTransaction = self) then
|
1758 |
begin
|
1759 |
result := TIBDatabase(FDatabases[i]);
|
1760 |
break;
|
1761 |
end;
|
1762 |
end;
|
1763 |
end;
|
1764 |
|
1765 |
function TIBTransaction.GetEndAction: TTransactionAction;
|
1766 |
begin
|
1767 |
if FInEndTransaction then
|
1768 |
Result := FEndAction
|
1769 |
else
|
1770 |
IBError(ibxeIB60feature, [nil])
|
1771 |
end;
|
1772 |
|
1773 |
|
1774 |
function TIBTransaction.GetIdleTimer: Integer;
|
1775 |
begin
|
1776 |
result := FTimer.Interval;
|
1777 |
end;
|
1778 |
|
1779 |
procedure TIBTransaction.Loaded;
|
1780 |
begin
|
1781 |
inherited Loaded;
|
1782 |
end;
|
1783 |
|
1784 |
procedure TIBTransaction.BeforeDatabaseDisconnect(DB: TIBDatabase);
|
1785 |
begin
|
1786 |
if InTransaction then
|
1787 |
EndTransaction(FDefaultAction, True);
|
1788 |
end;
|
1789 |
|
1790 |
procedure TIBTransaction.RemoveDatabase(Idx: Integer);
|
1791 |
var
|
1792 |
DB: TIBDatabase;
|
1793 |
begin
|
1794 |
if ((Idx >= 0) and (FDatabases[Idx] <> nil)) then
|
1795 |
begin
|
1796 |
DB := Databases[Idx];
|
1797 |
FDatabases[Idx] := nil;
|
1798 |
DB.RemoveTransaction(DB.FindTransaction(Self));
|
1799 |
if DB = FDefaultDatabase then
|
1800 |
FDefaultDatabase := nil;
|
1801 |
end;
|
1802 |
end;
|
1803 |
|
1804 |
procedure TIBTransaction.RemoveDatabases;
|
1805 |
var
|
1806 |
i: Integer;
|
1807 |
begin
|
1808 |
for i := 0 to FDatabases.Count - 1 do if FDatabases[i] <> nil then
|
1809 |
RemoveDatabase(i);
|
1810 |
end;
|
1811 |
|
1812 |
procedure TIBTransaction.RemoveSQLObject(Idx: Integer);
|
1813 |
var
|
1814 |
ds: TIBBase;
|
1815 |
begin
|
1816 |
if ((Idx >= 0) and (FSQLObjects[Idx] <> nil)) then
|
1817 |
begin
|
1818 |
ds := SQLObjects[Idx];
|
1819 |
FSQLObjects[Idx] := nil;
|
1820 |
ds.Transaction := nil;
|
1821 |
end;
|
1822 |
end;
|
1823 |
|
1824 |
procedure TIBTransaction.RemoveSQLObjects;
|
1825 |
var
|
1826 |
i: Integer;
|
1827 |
begin
|
1828 |
for i := 0 to FSQLObjects.Count - 1 do if FSQLObjects[i] <> nil then
|
1829 |
RemoveSQLObject(i);
|
1830 |
end;
|
1831 |
|
1832 |
procedure TIBTransaction.Rollback;
|
1833 |
begin
|
1834 |
EndTransaction(TARollback, False);
|
1835 |
end;
|
1836 |
|
1837 |
procedure TIBTransaction.RollbackRetaining;
|
1838 |
begin
|
1839 |
EndTransaction(TARollbackRetaining, False);
|
1840 |
end;
|
1841 |
|
1842 |
procedure TIBTransaction.SetActive(Value: Boolean);
|
1843 |
begin
|
1844 |
if csReading in ComponentState then
|
1845 |
FStreamedActive := Value
|
1846 |
else
|
1847 |
if Value and not InTransaction then
|
1848 |
StartTransaction
|
1849 |
else
|
1850 |
if not Value and InTransaction then
|
1851 |
Rollback;
|
1852 |
end;
|
1853 |
|
1854 |
procedure TIBTransaction.SetDefaultAction(Value: TTransactionAction);
|
1855 |
begin
|
1856 |
(* if (Value = taRollbackRetaining) and (GetIBClientVersion < 6) then
|
1857 |
IBError(ibxeIB60feature, [nil]);*)
|
1858 |
FDefaultAction := Value;
|
1859 |
end;
|
1860 |
|
1861 |
procedure TIBTransaction.SetDefaultDatabase(Value: TIBDatabase);
|
1862 |
var
|
1863 |
i: integer;
|
1864 |
begin
|
1865 |
if (FDefaultDatabase <> nil) and (FDefaultDatabase <> Value) then
|
1866 |
begin
|
1867 |
i := FDefaultDatabase.FindTransaction(self);
|
1868 |
if (i <> -1) then
|
1869 |
FDefaultDatabase.RemoveTransaction(i);
|
1870 |
end;
|
1871 |
if (Value <> nil) and (FDefaultDatabase <> Value) then
|
1872 |
begin
|
1873 |
Value.AddTransaction(Self);
|
1874 |
AddDatabase(Value);
|
1875 |
for i := 0 to FSQLObjects.Count - 1 do
|
1876 |
if (FSQLObjects[i] <> nil) and
|
1877 |
(TIBBase(FSQLObjects[i]).Database = nil) then
|
1878 |
SetObjectProp(TIBBase(FSQLObjects[i]).Owner, 'Database', Value);
|
1879 |
end;
|
1880 |
FDefaultDatabase := Value;
|
1881 |
end;
|
1882 |
|
1883 |
procedure TIBTransaction.SetHandle(Value: TISC_TR_HANDLE);
|
1884 |
begin
|
1885 |
if (HandleIsShared) then
|
1886 |
EndTransaction(DefaultAction, True)
|
1887 |
else
|
1888 |
CheckNotInTransaction;
|
1889 |
FHandle := Value;
|
1890 |
FHandleIsShared := (Value <> nil);
|
1891 |
end;
|
1892 |
|
1893 |
procedure TIBTransaction.Notification( AComponent: TComponent;
|
1894 |
Operation: TOperation);
|
1895 |
var
|
1896 |
i: Integer;
|
1897 |
begin
|
1898 |
inherited Notification( AComponent, Operation);
|
1899 |
if (Operation = opRemove) and (AComponent = FDefaultDatabase) then
|
1900 |
begin
|
1901 |
i := FindDatabase(FDefaultDatabase);
|
1902 |
if (i <> -1) then
|
1903 |
RemoveDatabase(i);
|
1904 |
FDefaultDatabase := nil;
|
1905 |
end;
|
1906 |
end;
|
1907 |
|
1908 |
procedure TIBTransaction.SetIdleTimer(Value: Integer);
|
1909 |
begin
|
1910 |
if Value < 0 then
|
1911 |
IBError(ibxeTimeoutNegative, [nil])
|
1912 |
else
|
1913 |
if (Value = 0) then
|
1914 |
begin
|
1915 |
FTimer.Enabled := False;
|
1916 |
FTimer.Interval := 0;
|
1917 |
end
|
1918 |
else
|
1919 |
if (Value > 0) then
|
1920 |
begin
|
1921 |
FTimer.Interval := Value;
|
1922 |
if not (csDesigning in ComponentState) then
|
1923 |
FTimer.Enabled := True;
|
1924 |
end;
|
1925 |
end;
|
1926 |
|
1927 |
procedure TIBTransaction.SetTRParams(Value: TStrings);
|
1928 |
begin
|
1929 |
FTRParams.Assign(Value);
|
1930 |
end;
|
1931 |
|
1932 |
procedure TIBTransaction.StartTransaction;
|
1933 |
var
|
1934 |
pteb: PISC_TEB_ARRAY;
|
1935 |
TPB: String;
|
1936 |
i: Integer;
|
1937 |
begin
|
1938 |
CheckNotInTransaction;
|
1939 |
CheckDatabasesInList;
|
1940 |
for i := 0 to FDatabases.Count - 1 do
|
1941 |
if FDatabases[i] <> nil then
|
1942 |
begin
|
1943 |
with TIBDatabase(FDatabases[i]) do
|
1944 |
if not Connected then
|
1945 |
if FStreamedConnected then
|
1946 |
begin
|
1947 |
Open;
|
1948 |
FStreamedConnected := False;
|
1949 |
end
|
1950 |
else
|
1951 |
IBError(ibxeDatabaseClosed, [nil]);
|
1952 |
end;
|
1953 |
if FTRParamsChanged then
|
1954 |
begin
|
1955 |
FTRParamsChanged := False;
|
1956 |
GenerateTPB(FTRParams, TPB, FTPBLength);
|
1957 |
if FTPBLength > 0 then
|
1958 |
begin
|
1959 |
IBAlloc(FTPB, 0, FTPBLength);
|
1960 |
Move(TPB[1], FTPB[0], FTPBLength);
|
1961 |
end;
|
1962 |
end;
|
1963 |
|
1964 |
pteb := nil;
|
1965 |
IBAlloc(pteb, 0, DatabaseCount * SizeOf(TISC_TEB));
|
1966 |
try
|
1967 |
for i := 0 to DatabaseCount - 1 do if Databases[i] <> nil then
|
1968 |
begin
|
1969 |
pteb^[i].db_handle := @(Databases[i].Handle);
|
1970 |
pteb^[i].tpb_length := FTPBLength;
|
1971 |
pteb^[i].tpb_address := FTPB;
|
1972 |
end;
|
1973 |
if Call(isc_start_multiple(StatusVector, @FHandle,
|
1974 |
DatabaseCount, PISC_TEB(pteb)), False) > 0 then
|
1975 |
begin
|
1976 |
FHandle := nil;
|
1977 |
IBDataBaseError;
|
1978 |
end;
|
1979 |
if not (csDesigning in ComponentState) then
|
1980 |
MonitorHook.TRStart(Self);
|
1981 |
finally
|
1982 |
FreeMem(pteb);
|
1983 |
end;
|
1984 |
DoOnStartTransaction;
|
1985 |
end;
|
1986 |
|
1987 |
procedure TIBTransaction.TimeoutTransaction(Sender: TObject);
|
1988 |
begin
|
1989 |
if InTransaction then
|
1990 |
begin
|
1991 |
if FCanTimeout then
|
1992 |
begin
|
1993 |
EndTransaction(FDefaultAction, True);
|
1994 |
if Assigned(FOnIdleTimer) then
|
1995 |
FOnIdleTimer(Self);
|
1996 |
end
|
1997 |
else
|
1998 |
FCanTimeout := True;
|
1999 |
end;
|
2000 |
end;
|
2001 |
|
2002 |
procedure TIBTransaction.TRParamsChange(Sender: TObject);
|
2003 |
begin
|
2004 |
FTRParamsChanged := True;
|
2005 |
end;
|
2006 |
|
2007 |
procedure TIBTransaction.TRParamsChanging(Sender: TObject);
|
2008 |
begin
|
2009 |
EnsureNotInTransaction;
|
2010 |
CheckNotInTransaction;
|
2011 |
end;
|
2012 |
|
2013 |
{ TIBBase }
|
2014 |
constructor TIBBase.Create(AOwner: TObject);
|
2015 |
begin
|
2016 |
FOwner := AOwner;
|
2017 |
end;
|
2018 |
|
2019 |
destructor TIBBase.Destroy;
|
2020 |
begin
|
2021 |
SetDatabase(nil);
|
2022 |
SetTransaction(nil);
|
2023 |
inherited Destroy;
|
2024 |
end;
|
2025 |
|
2026 |
function TIBBase.GetCharSetSize(CharSetID: integer): integer;
|
2027 |
begin
|
2028 |
if (CharSetID >= 0) and (CharSetID < Length(Database.FCharSetSizes)) then
|
2029 |
Result := Database.FCharSetSizes[CharSetID]
|
2030 |
else
|
2031 |
Result := 1; {Unknown character set}
|
2032 |
end;
|
2033 |
|
2034 |
function TIBBase.GetDefaultCharSetSize: integer;
|
2035 |
var DefaultCharSetName: string;
|
2036 |
i: integer;
|
2037 |
begin
|
2038 |
DefaultCharSetName := GetDefaultCharSetName;
|
2039 |
Result := 4; {worse case}
|
2040 |
for i := 0 to Length(Database.FCharSetSizes) - 1 do
|
2041 |
if Database.FCharSetNames[i] = DefaultCharSetName then
|
2042 |
begin
|
2043 |
Result := Database.FCharSetSizes[i];
|
2044 |
break;
|
2045 |
end;
|
2046 |
end;
|
2047 |
|
2048 |
function TIBBase.GetCharSetName(CharSetID: integer): string;
|
2049 |
begin
|
2050 |
if (CharSetID >= 0) and (CharSetID < Length(Database.FCharSetNames)) then
|
2051 |
Result := Database.FCharSetNames[CharSetID]
|
2052 |
else
|
2053 |
Result := ''; {Unknown character set}
|
2054 |
end;
|
2055 |
|
2056 |
function TIBBase.GetDefaultCharSetName: string;
|
2057 |
begin
|
2058 |
Result := AnsiUpperCase(Database.Params.Values['lc_ctype']);
|
2059 |
end;
|
2060 |
|
2061 |
procedure TIBBase.HandleException(Sender: TObject);
|
2062 |
begin
|
2063 |
if assigned(Database) then
|
2064 |
Database.HandleException(Sender)
|
2065 |
else
|
2066 |
SysUtils.ShowException(ExceptObject,ExceptAddr);
|
2067 |
end;
|
2068 |
|
2069 |
procedure TIBBase.SetCursor;
|
2070 |
begin
|
2071 |
if Assigned(Database) and not Database.SQLHourGlass then
|
2072 |
Exit;
|
2073 |
if assigned(IBGUIInterface) then
|
2074 |
IBGUIInterface.SetCursor;
|
2075 |
end;
|
2076 |
|
2077 |
procedure TIBBase.RestoreCursor;
|
2078 |
begin
|
2079 |
if Assigned(Database) and not Database.SQLHourGlass then
|
2080 |
Exit;
|
2081 |
if assigned(IBGUIInterface) then
|
2082 |
IBGUIInterface.RestoreCursor;
|
2083 |
end;
|
2084 |
|
2085 |
procedure TIBBase.CheckDatabase;
|
2086 |
begin
|
2087 |
if (FDatabase = nil) then
|
2088 |
IBError(ibxeDatabaseNotAssigned, [nil]);
|
2089 |
FDatabase.CheckActive;
|
2090 |
end;
|
2091 |
|
2092 |
procedure TIBBase.CheckTransaction;
|
2093 |
begin
|
2094 |
if FTransaction = nil then
|
2095 |
IBError(ibxeTransactionNotAssigned, [nil]);
|
2096 |
FTransaction.CheckInTransaction;
|
2097 |
end;
|
2098 |
|
2099 |
function TIBBase.GetDBHandle: PISC_DB_HANDLE;
|
2100 |
begin
|
2101 |
CheckDatabase;
|
2102 |
result := @FDatabase.Handle;
|
2103 |
end;
|
2104 |
|
2105 |
function TIBBase.GetTRHandle: PISC_TR_HANDLE;
|
2106 |
begin
|
2107 |
CheckTransaction;
|
2108 |
result := @FTransaction.Handle;
|
2109 |
end;
|
2110 |
|
2111 |
procedure TIBBase.DoBeforeDatabaseConnect(DBParams: TStrings; var DBName: string
|
2112 |
);
|
2113 |
begin
|
2114 |
if assigned(FBeforeDatabaseConnect) then
|
2115 |
BeforeDatabaseConnect(self,DBParams,DBName);
|
2116 |
end;
|
2117 |
|
2118 |
procedure TIBBase.DoAfterDatabaseConnect;
|
2119 |
begin
|
2120 |
if assigned(FAfterDatabaseConnect) then
|
2121 |
AfterDatabaseConnect(self);
|
2122 |
end;
|
2123 |
|
2124 |
procedure TIBBase.DoBeforeDatabaseDisconnect;
|
2125 |
begin
|
2126 |
if Assigned(BeforeDatabaseDisconnect) then
|
2127 |
BeforeDatabaseDisconnect(Self);
|
2128 |
end;
|
2129 |
|
2130 |
procedure TIBBase.DoAfterDatabaseDisconnect;
|
2131 |
begin
|
2132 |
if Assigned(AfterDatabaseDisconnect) then
|
2133 |
AfterDatabaseDisconnect(Self);
|
2134 |
end;
|
2135 |
|
2136 |
procedure TIBBase.DoDatabaseFree;
|
2137 |
begin
|
2138 |
if Assigned(OnDatabaseFree) then
|
2139 |
OnDatabaseFree(Self);
|
2140 |
SetDatabase(nil);
|
2141 |
SetTransaction(nil);
|
2142 |
end;
|
2143 |
|
2144 |
procedure TIBBase.DoBeforeTransactionEnd(Action: TTransactionAction);
|
2145 |
begin
|
2146 |
if Assigned(BeforeTransactionEnd) then
|
2147 |
BeforeTransactionEnd(Self,Action);
|
2148 |
end;
|
2149 |
|
2150 |
procedure TIBBase.DoAfterTransactionEnd;
|
2151 |
begin
|
2152 |
if Assigned(AfterTransactionEnd) then
|
2153 |
AfterTransactionEnd(Self);
|
2154 |
end;
|
2155 |
|
2156 |
procedure TIBBase.DoTransactionFree;
|
2157 |
begin
|
2158 |
if Assigned(OnTransactionFree) then
|
2159 |
OnTransactionFree(Self);
|
2160 |
FTransaction := nil;
|
2161 |
end;
|
2162 |
|
2163 |
procedure TIBBase.DoAfterExecQuery(Sender: TObject);
|
2164 |
begin
|
2165 |
if FTransaction <> nil then
|
2166 |
FTransaction.DoAfterExecQuery(Sender);
|
2167 |
end;
|
2168 |
|
2169 |
procedure TIBBase.DoAfterEdit(Sender: TObject);
|
2170 |
begin
|
2171 |
if FTransaction <> nil then
|
2172 |
FTransaction.DoAfterEdit(Sender);
|
2173 |
end;
|
2174 |
|
2175 |
procedure TIBBase.DoAfterDelete(Sender: TObject);
|
2176 |
begin
|
2177 |
if FTransaction <> nil then
|
2178 |
FTransaction.DoAfterDelete(Sender);
|
2179 |
end;
|
2180 |
|
2181 |
procedure TIBBase.DoAfterInsert(Sender: TObject);
|
2182 |
begin
|
2183 |
if FTransaction <> nil then
|
2184 |
FTransaction.DoAfterInsert(Sender);
|
2185 |
end;
|
2186 |
|
2187 |
procedure TIBBase.DoAfterPost(Sender: TObject);
|
2188 |
begin
|
2189 |
if FTransaction <> nil then
|
2190 |
FTransaction.DoAfterPost(Sender);
|
2191 |
end;
|
2192 |
|
2193 |
procedure TIBBase.SetDatabase(Value: TIBDatabase);
|
2194 |
begin
|
2195 |
if (FDatabase <> nil) then
|
2196 |
FDatabase.RemoveSQLObject(FIndexInDatabase);
|
2197 |
FDatabase := Value;
|
2198 |
if (FDatabase <> nil) then
|
2199 |
begin
|
2200 |
FIndexInDatabase := FDatabase.AddSQLObject(Self);
|
2201 |
if (FTransaction = nil) then
|
2202 |
Transaction := FDatabase.FindDefaultTransaction;
|
2203 |
end;
|
2204 |
end;
|
2205 |
|
2206 |
procedure TIBBase.SetTransaction(Value: TIBTransaction);
|
2207 |
begin
|
2208 |
if (FTransaction <> nil) then
|
2209 |
FTransaction.RemoveSQLObject(FIndexInTransaction);
|
2210 |
FTransaction := Value;
|
2211 |
if (FTransaction <> nil) then
|
2212 |
begin
|
2213 |
FIndexInTransaction := FTransaction.AddSQLObject(Self);
|
2214 |
if (FDatabase = nil) then
|
2215 |
Database := FTransaction.FindDefaultDatabase;
|
2216 |
end;
|
2217 |
end;
|
2218 |
|
2219 |
{ GenerateDPB -
|
2220 |
Given a string containing a textual representation
|
2221 |
of the database parameters, generate a database
|
2222 |
parameter buffer, and return it and its length
|
2223 |
in DPB and DPBLength, respectively. }
|
2224 |
|
2225 |
procedure GenerateDPB(sl: TStrings; var DPB: string; var DPBLength: Short);
|
2226 |
var
|
2227 |
i, j, pval: Integer;
|
2228 |
DPBVal: UShort;
|
2229 |
ParamName, ParamValue: string;
|
2230 |
begin
|
2231 |
{ The DPB is initially empty, with the exception that
|
2232 |
the DPB version must be the first byte of the string. }
|
2233 |
DPBLength := 1;
|
2234 |
DPB := Char(isc_dpb_version1);
|
2235 |
|
2236 |
{Iterate through the textual database parameters, constructing
|
2237 |
a DPB on-the-fly }
|
2238 |
for i := 0 to sl.Count - 1 do
|
2239 |
begin
|
2240 |
{ Get the parameter's name and value from the list,
|
2241 |
and make sure that the name is all lowercase with
|
2242 |
no leading 'isc_dpb_' prefix
|
2243 |
}
|
2244 |
if (Trim(sl.Names[i]) = '') then
|
2245 |
continue;
|
2246 |
ParamName := LowerCase(sl.Names[i]); {mbcs ok}
|
2247 |
ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
|
2248 |
if (Pos(DPBPrefix, ParamName) = 1) then {mbcs ok}
|
2249 |
Delete(ParamName, 1, Length(DPBPrefix));
|
2250 |
{ We want to translate the parameter name to some Integer
|
2251 |
value. We do this by scanning through a list of known
|
2252 |
database parameter names (DPBConstantNames, defined above) }
|
2253 |
DPBVal := 0;
|
2254 |
{ Find the parameter }
|
2255 |
for j := 1 to isc_dpb_last_dpb_constant do
|
2256 |
if (ParamName = DPBConstantNames[j]) then
|
2257 |
begin
|
2258 |
DPBVal := j;
|
2259 |
break;
|
2260 |
end;
|
2261 |
{ A database parameter either contains a string value (case 1)
|
2262 |
or an Integer value (case 2)
|
2263 |
or no value at all (case 3)
|
2264 |
or an error needs to be generated (case else) }
|
2265 |
case DPBVal of
|
2266 |
isc_dpb_user_name, isc_dpb_password, isc_dpb_password_enc,
|
2267 |
isc_dpb_sys_user_name, isc_dpb_license, isc_dpb_encrypt_key,
|
2268 |
isc_dpb_lc_messages, isc_dpb_lc_ctype,
|
2269 |
isc_dpb_sql_role_name, isc_dpb_sql_dialect:
|
2270 |
begin
|
2271 |
if DPBVal = isc_dpb_sql_dialect then
|
2272 |
ParamValue[1] := Char(Ord(ParamValue[1]) - 48);
|
2273 |
DPB := DPB +
|
2274 |
Char(DPBVal) +
|
2275 |
Char(Length(ParamValue)) +
|
2276 |
ParamValue;
|
2277 |
Inc(DPBLength, 2 + Length(ParamValue));
|
2278 |
end;
|
2279 |
isc_dpb_num_buffers, isc_dpb_dbkey_scope, isc_dpb_force_write,
|
2280 |
isc_dpb_no_reserve, isc_dpb_damaged, isc_dpb_verify:
|
2281 |
begin
|
2282 |
DPB := DPB +
|
2283 |
Char(DPBVal) +
|
2284 |
#1 +
|
2285 |
Char(StrToInt(ParamValue));
|
2286 |
Inc(DPBLength, 3);
|
2287 |
end;
|
2288 |
isc_dpb_sweep:
|
2289 |
begin
|
2290 |
DPB := DPB +
|
2291 |
Char(DPBVal) +
|
2292 |
#1 +
|
2293 |
Char(isc_dpb_records);
|
2294 |
Inc(DPBLength, 3);
|
2295 |
end;
|
2296 |
isc_dpb_sweep_interval:
|
2297 |
begin
|
2298 |
pval := StrToInt(ParamValue);
|
2299 |
DPB := DPB +
|
2300 |
Char(DPBVal) +
|
2301 |
#4 +
|
2302 |
PChar(@pval)[0] +
|
2303 |
PChar(@pval)[1] +
|
2304 |
PChar(@pval)[2] +
|
2305 |
PChar(@pval)[3];
|
2306 |
Inc(DPBLength, 6);
|
2307 |
end;
|
2308 |
isc_dpb_activate_shadow, isc_dpb_delete_shadow, isc_dpb_begin_log,
|
2309 |
isc_dpb_quit_log:
|
2310 |
begin
|
2311 |
DPB := DPB +
|
2312 |
Char(DPBVal) +
|
2313 |
#1 + #0;
|
2314 |
Inc(DPBLength, 3);
|
2315 |
end;
|
2316 |
else
|
2317 |
begin
|
2318 |
if (DPBVal > 0) and
|
2319 |
(DPBVal <= isc_dpb_last_dpb_constant) then
|
2320 |
IBError(ibxeDPBConstantNotSupported, [DPBConstantNames[DPBVal]])
|
2321 |
else
|
2322 |
IBError(ibxeDPBConstantUnknownEx, [sl.Names[i]]);
|
2323 |
end;
|
2324 |
end;
|
2325 |
end;
|
2326 |
end;
|
2327 |
|
2328 |
{ GenerateTPB -
|
2329 |
Given a string containing a textual representation
|
2330 |
of the transaction parameters, generate a transaction
|
2331 |
parameter buffer, and return it and its length in
|
2332 |
TPB and TPBLength, respectively. }
|
2333 |
procedure GenerateTPB(sl: TStrings; var TPB: string; var TPBLength: Short);
|
2334 |
var
|
2335 |
i, j, TPBVal, ParamLength: Integer;
|
2336 |
ParamName, ParamValue: string;
|
2337 |
begin
|
2338 |
TPB := '';
|
2339 |
if (sl.Count = 0) then
|
2340 |
TPBLength := 0
|
2341 |
else
|
2342 |
begin
|
2343 |
TPBLength := sl.Count + 1;
|
2344 |
TPB := TPB + Char(isc_tpb_version3);
|
2345 |
end;
|
2346 |
for i := 0 to sl.Count - 1 do
|
2347 |
begin
|
2348 |
if (Trim(sl[i]) = '') then
|
2349 |
begin
|
2350 |
Dec(TPBLength);
|
2351 |
Continue;
|
2352 |
end;
|
2353 |
if (Pos('=', sl[i]) = 0) then {mbcs ok}
|
2354 |
ParamName := LowerCase(sl[i]) {mbcs ok}
|
2355 |
else
|
2356 |
begin
|
2357 |
ParamName := LowerCase(sl.Names[i]); {mbcs ok}
|
2358 |
ParamValue := Copy(sl[i], Pos('=', sl[i]) + 1, Length(sl[i])); {mbcs ok}
|
2359 |
end;
|
2360 |
if (Pos(TPBPrefix, ParamName) = 1) then {mbcs ok}
|
2361 |
Delete(ParamName, 1, Length(TPBPrefix));
|
2362 |
TPBVal := 0;
|
2363 |
{ Find the parameter }
|
2364 |
for j := 1 to isc_tpb_last_tpb_constant do
|
2365 |
if (ParamName = TPBConstantNames[j]) then
|
2366 |
begin
|
2367 |
TPBVal := j;
|
2368 |
break;
|
2369 |
end;
|
2370 |
{ Now act on it }
|
2371 |
case TPBVal of
|
2372 |
isc_tpb_consistency, isc_tpb_exclusive, isc_tpb_protected,
|
2373 |
isc_tpb_concurrency, isc_tpb_shared, isc_tpb_wait, isc_tpb_nowait,
|
2374 |
isc_tpb_read, isc_tpb_write, isc_tpb_ignore_limbo,
|
2375 |
isc_tpb_read_committed, isc_tpb_rec_version, isc_tpb_no_rec_version:
|
2376 |
TPB := TPB + Char(TPBVal);
|
2377 |
isc_tpb_lock_read, isc_tpb_lock_write:
|
2378 |
begin
|
2379 |
TPB := TPB + Char(TPBVal);
|
2380 |
{ Now set the string parameter }
|
2381 |
ParamLength := Length(ParamValue);
|
2382 |
Inc(TPBLength, ParamLength + 1);
|
2383 |
TPB := TPB + Char(ParamLength) + ParamValue;
|
2384 |
end;
|
2385 |
else
|
2386 |
begin
|
2387 |
if (TPBVal > 0) and
|
2388 |
(TPBVal <= isc_tpb_last_tpb_constant) then
|
2389 |
IBError(ibxeTPBConstantNotSupported, [TPBConstantNames[TPBVal]])
|
2390 |
else
|
2391 |
IBError(ibxeTPBConstantUnknownEx, [sl.Names[i]]);
|
2392 |
end;
|
2393 |
end;
|
2394 |
end;
|
2395 |
end;
|
2396 |
|
2397 |
end.
|
2398 |
|
2399 |
|
2400 |
|
2401 |
|
2402 |
|