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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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{************************************************************************}
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unit IBDatabaseInfo;
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interface
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uses
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Windows, SysUtils, Classes, Forms, ExtCtrls,
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IBHeader, IBExternals, IB, IBDatabase;
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type
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TIBDatabaseInfo = class(TComponent)
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protected
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FIBLoaded: Boolean;
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FDatabase: TIBDatabase;
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FUserNames : TStringList;
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FBackoutCount: TStringList;
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FDeleteCount: TStringList;
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FExpungeCount: TStringList;
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FInsertCount: TStringList;
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FPurgeCount: TStringList;
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FReadIdxCount: TStringList;
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FReadSeqCount: TStringList;
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FUpdateCount: TStringList;
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function GetAllocation: Long;
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function GetBaseLevel: Long;
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function GetDBFileName: String;
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function GetDBSiteName: String;
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function GetDBImplementationNo: Long;
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function GetDBImplementationClass: Long;
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function GetNoReserve: Long;
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function GetODSMinorVersion: Long;
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function GetODSMajorVersion: Long;
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function GetPageSize: Long;
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function GetVersion: String;
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function GetCurrentMemory: Long;
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function GetForcedWrites: Long;
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function GetMaxMemory: Long;
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function GetNumBuffers: Long;
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function GetSweepInterval: Long;
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function GetUserNames: TStringList;
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function GetFetches: Long;
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function GetMarks: Long;
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function GetReads: Long;
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function GetWrites: Long;
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function GetBackoutCount: TStringList;
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function GetDeleteCount: TStringList;
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function GetExpungeCount: TStringList;
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function GetInsertCount: TStringList;
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function GetPurgeCount: TStringList;
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function GetReadIdxCount: TStringList;
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function GetReadSeqCount: TStringList;
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function GetUpdateCount: TStringList;
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function GetOperationCounts(DBInfoCommand: Integer; FOperation: TStringList): TStringList;
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function GetReadOnly: Long;
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function GetLongDatabaseInfo(DatabaseInfoCommand: Integer): Long;
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function GetStringDatabaseInfo(DatabaseInfoCommand: Integer): String;
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function GetDBSQLDialect: Long;
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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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property Allocation: Long read GetAllocation;
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property BaseLevel: Long read GetBaseLevel;
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property DBFileName: String read GetDBFileName;
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property DBSiteName: String read GetDBSiteName;
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property DBImplementationNo: Long read GetDBImplementationNo;
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property DBImplementationClass: Long read GetDBImplementationClass;
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property NoReserve: Long read GetNoReserve;
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property ODSMinorVersion: Long read GetODSMinorVersion;
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property ODSMajorVersion: Long read GetODSMajorVersion;
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property PageSize: Long read GetPageSize;
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property Version: String read GetVersion;
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property CurrentMemory: Long read GetCurrentMemory;
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property ForcedWrites: Long read GetForcedWrites;
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property MaxMemory: Long read GetMaxMemory;
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property NumBuffers: Long read GetNumBuffers;
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property SweepInterval: Long read GetSweepInterval;
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property UserNames: TStringList read GetUserNames;
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property Fetches: Long read GetFetches;
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property Marks: Long read GetMarks;
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property Reads: Long read GetReads;
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property Writes: Long read GetWrites;
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property BackoutCount: TStringList read GetBackoutCount;
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property DeleteCount: TStringList read GetDeleteCount;
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property ExpungeCount: TStringList read GetExpungeCount;
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property InsertCount: TStringList read GetInsertCount;
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property PurgeCount: TStringList read GetPurgeCount;
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property ReadIdxCount: TStringList read GetReadIdxCount;
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property ReadSeqCount: TStringList read GetReadSeqCount;
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property UpdateCount: TStringList read GetUpdateCount;
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property DBSQLDialect : Long read GetDBSQLDialect;
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property ReadOnly: Long read GetReadOnly;
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published
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property Database: TIBDatabase read FDatabase write FDatabase;
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end;
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implementation
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uses
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IBIntf;
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{ TIBDatabaseInfo }
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constructor TIBDatabaseInfo.Create(AOwner: TComponent);
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begin
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inherited Create(AOwner);
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FIBLoaded := False;
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CheckIBLoaded;
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FIBLoaded := True;
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FUserNames := TStringList.Create;
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FBackoutCount := nil;
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FDeleteCount := nil;
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FExpungeCount := nil;
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FInsertCount := nil;
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FPurgeCount := nil;
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FReadIdxCount := nil;
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FReadSeqCount := nil;
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FUpdateCount := nil;
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end;
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destructor TIBDatabaseInfo.Destroy;
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begin
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if FIBLoaded then
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begin
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FUserNames.Free;
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FBackoutCount.Free;
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FDeleteCount.Free;
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FExpungeCount.Free;
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FInsertCount.Free;
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FPurgeCount.Free;
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FReadIdxCount.Free;
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FReadSeqCount.Free;
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FUpdateCount.Free;
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end;
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inherited Destroy;
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end;
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function TIBDatabaseInfo.Call(ErrCode: ISC_STATUS;
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RaiseError: Boolean): ISC_STATUS;
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begin
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result := ErrCode;
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if RaiseError and (ErrCode > 0) then
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IBDataBaseError;
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end;
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function TIBDatabaseInfo.GetAllocation: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_allocation);
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end;
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function TIBDatabaseInfo.GetBaseLevel: Long;
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var
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local_buffer: array[0..IBLocalBufferLength - 1] of Char;
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DatabaseInfoCommand: Char;
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begin
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DatabaseInfoCommand := Char(isc_info_base_level);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBLocalBufferLength, local_buffer), True);
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result := isc_vax_integer(@local_buffer[4], 1);
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end;
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function TIBDatabaseInfo.GetDBFileName: String;
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var
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local_buffer: array[0..IBLocalBufferLength - 1] of Char;
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DatabaseInfoCommand: Char;
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begin
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DatabaseInfoCommand := Char(isc_info_db_id);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBLocalBufferLength, local_buffer), True);
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local_buffer[5 + Int(local_buffer[4])] := #0;
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result := String(PChar(@local_buffer[5]));
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end;
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function TIBDatabaseInfo.GetDBSiteName: String;
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var
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local_buffer: array[0..IBBigLocalBufferLength - 1] of Char;
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p: PChar;
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DatabaseInfoCommand: Char;
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begin
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DatabaseInfoCommand := Char(isc_info_db_id);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBLocalBufferLength, local_buffer), True);
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p := @local_buffer[5 + Int(local_buffer[4])]; { DBSiteName Length }
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p := p + Int(p^) + 1; { End of DBSiteName }
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p^ := #0; { Null it }
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result := String(PChar(@local_buffer[6 + Int(local_buffer[4])]));
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end;
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function TIBDatabaseInfo.GetDBImplementationNo: Long;
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var
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local_buffer: array[0..IBLocalBufferLength - 1] of Char;
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DatabaseInfoCommand: Char;
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begin
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DatabaseInfoCommand := Char(isc_info_implementation);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBLocalBufferLength, local_buffer), True);
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result := isc_vax_integer(@local_buffer[3], 1);
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end;
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function TIBDatabaseInfo.GetDBImplementationClass: Long;
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var
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local_buffer: array[0..IBLocalBufferLength - 1] of Char;
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DatabaseInfoCommand: Char;
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begin
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DatabaseInfoCommand := Char(isc_info_implementation);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBLocalBufferLength, local_buffer), True);
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result := isc_vax_integer(@local_buffer[4], 1);
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end;
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function TIBDatabaseInfo.GetNoReserve: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_no_reserve);
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end;
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function TIBDatabaseInfo.GetODSMinorVersion: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_ods_minor_version);
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end;
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function TIBDatabaseInfo.GetODSMajorVersion: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_ods_version);
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end;
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function TIBDatabaseInfo.GetPageSize: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_page_size);
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end;
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function TIBDatabaseInfo.GetVersion: String;
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var
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local_buffer: array[0..IBBigLocalBufferLength - 1] of Char;
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DatabaseInfoCommand: Char;
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begin
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DatabaseInfoCommand := Char(isc_info_version);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBBigLocalBufferLength, local_buffer), True);
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local_buffer[5 + Int(local_buffer[4])] := #0;
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result := String(PChar(@local_buffer[5]));
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end;
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function TIBDatabaseInfo.GetCurrentMemory: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_current_memory);
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end;
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function TIBDatabaseInfo.GetForcedWrites: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_forced_writes);
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end;
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function TIBDatabaseInfo.GetMaxMemory: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_max_memory);
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end;
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function TIBDatabaseInfo.GetNumBuffers: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_num_buffers);
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end;
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function TIBDatabaseInfo.GetSweepInterval: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_sweep_interval);
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end;
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function TIBDatabaseInfo.GetUserNames: TStringList;
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var
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local_buffer: array[0..IBHugeLocalBufferLength - 1] of Char;
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temp_buffer: array[0..IBLocalBufferLength - 2] of Char;
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DatabaseInfoCommand: Char;
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i, user_length: Integer;
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begin
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result := FUserNames;
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DatabaseInfoCommand := Char(isc_info_user_names);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBHugeLocalBufferLength, local_buffer), True);
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FUserNames.Clear;
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i := 0;
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while local_buffer[i] = Char(isc_info_user_names) do
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begin
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Inc(i, 3); { skip "isc_info_user_names byte" & two unknown bytes of structure (see below) }
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user_length := Long(local_buffer[i]);
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Inc(i,1);
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Move(local_buffer[i], temp_buffer[0], user_length);
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Inc(i, user_length);
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temp_buffer[user_length] := #0;
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FUserNames.Add(String(temp_buffer));
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end;
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end;
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function TIBDatabaseInfo.GetFetches: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_fetches);
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end;
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function TIBDatabaseInfo.GetMarks: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_marks);
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end;
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function TIBDatabaseInfo.GetReads: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_reads);
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end;
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function TIBDatabaseInfo.GetWrites: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_writes);
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end;
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function TIBDatabaseInfo.GetOperationCounts(DBInfoCommand: Integer; FOperation: TStringList): TStringList;
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var
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local_buffer: array[0..IBHugeLocalBufferLength - 1] of Char;
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DatabaseInfoCommand: Char;
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i, qtd_tables, id_table, qtd_operations: Integer;
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begin
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if FOperation = nil then FOperation := TStringList.Create;
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result := FOperation;
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DatabaseInfoCommand := Char(DBInfoCommand);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
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IBHugeLocalBufferLength, local_buffer), True);
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FOperation.Clear;
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{ 1. 1 byte specifying the item type requested (e.g., isc_info_insert_count).
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2. 2 bytes telling how many bytes compose the subsequent value pairs.
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3. A pair of values for each table in the database on wich the requested
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type of operation has occurred since the database was last attached.
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Each pair consists of:
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1. 2 bytes specifying the table ID.
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2. 4 bytes listing the number of operations (e.g., inserts) done on that table.
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}
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qtd_tables := trunc(isc_vax_integer(@local_buffer[1],2)/6);
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for i := 0 to qtd_tables - 1 do
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begin
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id_table := isc_vax_integer(@local_buffer[3+(i*6)],2);
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qtd_operations := isc_vax_integer(@local_buffer[5+(i*6)],4);
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FOperation.Add(IntToStr(id_table)+'='+IntToStr(qtd_operations));
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end;
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end;
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function TIBDatabaseInfo.GetBackoutCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_backout_count,FBackoutCount);
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end;
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function TIBDatabaseInfo.GetDeleteCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_delete_count,FDeleteCount);
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end;
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function TIBDatabaseInfo.GetExpungeCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_expunge_count,FExpungeCount);
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end;
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function TIBDatabaseInfo.GetInsertCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_insert_count,FInsertCount);
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end;
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function TIBDatabaseInfo.GetPurgeCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_purge_count,FPurgeCount);
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end;
|
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|
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function TIBDatabaseInfo.GetReadIdxCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_read_idx_count,FReadIdxCount);
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end;
|
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function TIBDatabaseInfo.GetReadSeqCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_read_seq_count,FReadSeqCount);
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end;
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function TIBDatabaseInfo.GetUpdateCount: TStringList;
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begin
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result := GetOperationCounts(isc_info_update_count,FUpdateCount);
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end;
|
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function TIBDatabaseInfo.GetReadOnly: Long;
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begin
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result := GetLongDatabaseInfo(isc_info_db_read_only);
|
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end;
|
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|
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function TIBDatabaseInfo.GetLongDatabaseInfo(DatabaseInfoCommand: Integer): Long;
|
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var
|
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local_buffer: array[0..IBLocalBufferLength - 1] of Char;
|
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length: Integer;
|
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_DatabaseInfoCommand: Char;
|
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begin
|
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_DatabaseInfoCommand := Char(DatabaseInfoCommand);
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @_DatabaseInfoCommand,
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IBLocalBufferLength, local_buffer), True);
|
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length := isc_vax_integer(@local_buffer[1], 2);
|
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result := isc_vax_integer(@local_buffer[3], length);
|
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end;
|
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|
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function TIBDatabaseInfo.GetStringDatabaseInfo(DatabaseInfoCommand: Integer): String;
|
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var
|
430 |
local_buffer: array[0..IBBigLocalBufferLength - 1] of Char;
|
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_DatabaseInfoCommand: Char;
|
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begin
|
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_DatabaseInfoCommand := Char(DatabaseInfoCommand);
|
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Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @_DatabaseInfoCommand,
|
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IBBigLocalBufferLength, local_buffer), True);
|
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local_buffer[4 + Int(local_buffer[3])] := #0;
|
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result := String(PChar(@local_buffer[4]));
|
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end;
|
439 |
|
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|
441 |
function TIBDatabaseInfo.GetDBSQLDialect: Integer;
|
442 |
var
|
443 |
local_buffer: array[0..IBLocalBufferLength - 1] of Char;
|
444 |
length: Integer;
|
445 |
DatabaseInfoCommand: Char;
|
446 |
begin
|
447 |
DatabaseInfoCommand := Char(isc_info_db_SQL_Dialect);
|
448 |
Call(isc_database_info(StatusVector, @FDatabase.Handle, 1, @DatabaseInfoCommand,
|
449 |
IBLocalBufferLength, local_buffer), True);
|
450 |
if (local_buffer[0] <> Char(isc_info_db_SQL_dialect)) then
|
451 |
result := 1
|
452 |
else begin
|
453 |
length := isc_vax_integer(@local_buffer[1], 2);
|
454 |
result := isc_vax_integer(@local_buffer[3], length);
|
455 |
end;
|
456 |
end;
|
457 |
|
458 |
|
459 |
end.
|