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(*
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* IBX For Lazarus (Firebird Express)
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2014 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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unit ibxscript;
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{$mode objfpc}{$H+}
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interface
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uses Classes, IBDatabase, IBSQL, IBHeader;
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type
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TSQLSymbol = (sqNone,sqSpace,sqSemiColon,sqSingleQuotes,sqDoubleQuotes,
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sqEnd,sqBegin,sqCommit,sqRollback,sqString,sqCommentStart,
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sqCommentEnd,sqCommentLine,sqAsterisk,sqForwardSlash,
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sqDeclare,sqEOL,sqTerminator, sqReconnect);
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TSQLStates = (stInit, stError, stInSQL, stNested,stInSingleQuotes,
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stInDoubleQuotes, stInComment, stInCommentLine,
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stInDeclaration, stInCommit, stInReconnect);
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TGetParamValue = procedure(Sender: TObject; ParamName: string; var BlobID: TISC_QUAD) of object;
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TLogEvent = procedure(Sender: TObject; Msg: string) of Object;
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TOnProgressEvent = procedure (Sender: TObject; Reset: boolean; value: integer) of object;
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TOnSelectSQL = procedure (Sender: TObject; SQLText: string) of object;
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{
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TIBXScript: runs an SQL script in the specified file or stream. The text is parsed
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into SQL statements which are executed in turn. The intention is to be ISQL
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compatible but with extensions:
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* SET TERM and Set AutoDDL are both supported
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* New Command: RECONNECT. Performs a commit followed by disconnecting and
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reconnecting to the database.
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* Procedure Bodies (BEGIN .. END blocks) are self-delimiting and do not need
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an extra terminator. If a terminator is present, this is treated as an
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empty statement. The result is ISQL compatible, but does not require the
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use of SET TERM.
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* DML statements may have arguments in IBX format (e.g UPDATE MYTABLE Set data = :mydata).
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Arguments are valid only for BLOB columns and are resolved using the GetParamValue
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event. This returns the blobid to be used. A typical use of the event is to
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read binary data from a file, save it in a blob stream and return the blob id.
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Select SQL statements are not directly supported but can be handled by an external
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handler (OnSelectSQL event). If the handler is not present then an exception
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is raised if a Select SQL statement is found.
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Properties:
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* Database: Link to TIBDatabase component
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* Transaction: Link to Transaction. Defaults to internaltransaction (concurrency, wait)
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* Echo: boolean. When true, all SQL statements are echoed to log
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* StopOnFirstError: boolean. When true the script engine terminates on the first
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SQL Error.
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* IgnoreGrants: When true, grant statements are silently discarded. This can be
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useful when applying a script using the Embedded Server.
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Events:
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* GetParamValue: called when an SQL parameter is found (in PSQL :name format).
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This is only called for blob fields. Handler should return the BlobID to be
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used as the parameter value. If not present an exception is raised when a
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parameter is found.
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* OnOutputLog: Called to write SQL Statements to the log (stdout)
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* OnErrorLog: Called to write all other messages to the log (stderr)
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* OnProgressEvent: Progress bar support. If Reset is true the value is maximum
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value of progress bar. Otherwise called to step progress bar.
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* OnSelectSQL: handler for select SQL statements. If not present, select SQL
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statements result in an exception.
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The PerformUpdate function is used to execute an SQL Script and may be called
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multiple times.
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}
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{ TIBXScript }
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TIBXScript = class(TComponent)
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private
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FDatabase: TIBDatabase;
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FEcho: boolean;
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FIgnoreGrants: boolean;
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FOnErrorLog: TLogEvent;
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FOnProgressEvent: TOnProgressEvent;
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FOnSelectSQL: TOnSelectSQL;
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FStopOnFirstError: boolean;
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FTransaction: TIBTransaction;
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FInternalTransaction: TIBTransaction;
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FState: TSQLStates;
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FString: string;
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FISQL: TIBSQL;
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FLastSymbol: TSQLSymbol;
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FNested: integer;
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FLastChar: char;
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FSQLText: string;
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FHasBegin: boolean;
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FStack: array [0..16] of TSQLStates;
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FStackindex: integer;
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FGetParamValue: TGetParamValue;
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FOnOutputLog: TLogEvent;
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FTerminator: char;
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FAutoDDL: boolean;
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procedure Add2Log(const Msg: string; IsError: boolean=true);
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procedure AddToSQL(const Symbol: string);
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function AnalyseSQL(Lines: TStringList): boolean;
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procedure AnalyseLine(const Line: string);
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procedure DoCommit;
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procedure DoReconnect;
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procedure ExecSQL;
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function GetNextSymbol(C: char): TSQLSymbol;
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function GetSymbol(const Line: string; var index: integer): TSQLSymbol;
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function GetTransaction: TIBTransaction;
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procedure SetDatabase(AValue: TIBDatabase);
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procedure SetParamValue(SQLVar: TIBXSQLVAR);
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procedure SetState(AState: TSQLStates);
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procedure ClearStatement;
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function PopState: TSQLStates;
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function ProcessSetStatement(stmt: string): boolean;
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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 PerformUpdate(const SQLFile: string; AutoDDL: boolean): boolean; overload;
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function PerformUpdate(const SQLStream: TStream; AutoDDL: boolean): boolean; overload;
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published
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property Database: TIBDatabase read FDatabase write SetDatabase;
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property Echo: boolean read FEcho write FEcho default true; {Echo Input to Log}
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property IgnoreGrants: boolean read FIgnoreGrants write FIgnoreGrants;
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property Transaction: TIBTransaction read FTransaction write FTransaction;
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property StopOnFirstError: boolean read FStopOnFirstError write FStopOnFirstError default true;
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property GetParamValue: TGetParamValue read FGetParamValue write FGetParamValue; {resolve parameterized queries}
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property OnOutputLog: TLogEvent read FOnOutputLog write FOnOutputLog; {Log handler}
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property OnErrorLog: TLogEvent read FOnErrorLog write FOnErrorLog;
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property OnProgressEvent: TOnProgressEvent read FOnProgressEvent write FOnProgressEvent; {Progress Bar Support}
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property OnSelectSQL: TOnSelectSQL read FOnSelectSQL write FOnSelectSQL; {Handle Select SQL Statements}
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end;
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implementation
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uses Sysutils, IB, RegExpr;
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resourcestring
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sTerminatorUnknownState = 'Statement Terminator in unexpected state (%d)';
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sUnterminatedString = 'Unterminated string';
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sUnknownSymbol = 'Unknown Symbol %d';
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sNoSelectSQL = 'Select SQL Statements are not supported';
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sStackUnderflow = 'Stack Underflow';
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sInvalidAutoDDL = 'Invalid AUTODDL Statement - %s';
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sNoParamQueries = 'Parameterised Queries are not supported';
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sStackOverFlow = 'Stack Overflow';
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sResolveQueryParam = 'Resolving Query Parameter: %s';
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sNoCommit = 'Commit not allowed here';
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sNoReconnect = 'Reconnect not allowed here';
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{ TIBXScript }
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procedure TIBXScript.Add2Log(const Msg: string; IsError: boolean);
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begin
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if IsError then
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begin
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if assigned(OnErrorLog) then OnErrorLog(self,Msg)
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end
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else
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if assigned(FOnOutputLog) then FOnOutputLog(self,Msg)
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end;
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procedure TIBXScript.AddToSQL(const Symbol: string);
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begin
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FSQLText := FSQLText + Symbol
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end;
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procedure TIBXScript.AnalyseLine(const Line: string);
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var index: integer;
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Symbol: TSQLSymbol;
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NonSpace: boolean;
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begin
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index := 1;
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NonSpace := false;
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while true do
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begin
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if FState = stError then
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raise Exception.Create('Entered Error State');
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Symbol := GetSymbol(Line,index);
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if not (Symbol in [sqSpace,sqEOL]) then
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NonSpace := true;
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case Symbol of
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sqSpace:
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if not (FState in [stInComment,stInCommentLine]) then
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AddToSQL(' ');
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sqTerminator:
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if not (FState in [stInComment,stInCommentLine]) then
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case FState of
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stInit: {ignore empty statement};
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stInSQL:
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ExecSQL;
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stInCommit:
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DoCommit;
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stInReconnect:
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DoReconnect;
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stNested, stInSingleQuotes, stInDoubleQuotes:
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AddToSQL(FTerminator);
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stInDeclaration:
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begin
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FState := PopState;
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AddToSQL(FTerminator);
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end;
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else
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raise Exception.CreateFmt(sTerminatorUnknownState,[FState]);
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end;
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sqSemiColon:
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begin
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if FState = stInDeclaration then
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FState := PopState;
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AddToSQL(';');
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end;
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sqAsterisk:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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AddToSQL('*');
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if FState = stInit then
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FState := stInSQL
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end;
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sqForwardSlash:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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AddToSQL('/');
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if FState = stInit then
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FState := stInSQL
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end;
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sqCommentStart:
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if not (FState in [stInComment,stInCommentLine]) then
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SetState(stInComment);
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sqCommentEnd:
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if FState = stInComment then
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begin
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AddToSQL('/* ' + Trim(FString) + ' */');
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FState := PopState
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end
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else
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FState := stError;
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sqCommentLine:
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if not (FState in [stInComment,stInCommentLine]) then
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SetState(stInCommentLine);
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sqSingleQuotes:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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case FState of
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stInSingleQuotes:
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FState := PopState;
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stInDoubleQuotes:
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{Ignore};
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else
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SetState(stInSingleQuotes)
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end;
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AddToSQL('''')
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end;
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sqDoubleQuotes:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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case FState of
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stInSingleQuotes:
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{Ignore};
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stInDoubleQuotes:
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FState := PopState;
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else
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SetState(stInDoubleQuotes)
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end;
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AddToSQL('"')
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end;
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sqEnd:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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AddToSQL(FString);
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case FState of
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stInSingleQuotes,
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stInDoubleQuotes:
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{Ignore};
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stNested:
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begin
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if FNested = 0 then
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begin
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PopState;
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FState := stInit;
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ExecSQL
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end
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else
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Dec(FNested)
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end;
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{Otherwise ignore}
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end
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end;
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sqBegin:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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FHasBegin := true;
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AddToSQL(FString);
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case FState of
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stInSingleQuotes,
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stInDoubleQuotes:
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{Ignore};
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stNested:
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Inc(FNested);
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stInSQL,
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stInit:
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SetState(stNested);
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end
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end;
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sqDeclare:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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AddToSQL(FString);
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if FState in [stInit,stInSQL] then
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SetState(stInDeclaration)
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end;
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sqCommit:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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if FState = stInit then
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FState := stInCommit
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else
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raise Exception.Create(sNoCommit)
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end;
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sqReconnect:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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if FState = stInit then
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FState := stInReconnect
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else
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raise Exception.Create(sNoReconnect)
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end;
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sqString:
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if not (FState in [stInComment,stInCommentLine]) then
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begin
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AddToSQL(FString);
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if FState = stInit then
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FState := stInSQL
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end;
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sqEOL:
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begin
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case FState of
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stInCommentLine:
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begin
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AddToSQL('/* ' + Trim(FString) + ' */');
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FState := PopState;
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end;
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stInDoubleQuotes,
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stInSingleQuotes:
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raise Exception.Create(sUnterminatedString);
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end;
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if NonSpace then AddToSQL(#13#10);
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Exit;
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end;
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else
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raise Exception.CreateFmt(sUnknownSymbol,[Symbol]);
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end
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end
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end;
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406 |
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function TIBXScript.AnalyseSQL(Lines: TStringList): boolean;
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var I: integer;
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begin
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Result := true;
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411 |
ClearStatement;
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FLastSymbol := sqNone;
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413 |
for I := 0 to Lines.Count - 1 do
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begin
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415 |
if Echo then Add2Log(Lines[I],false);
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if assigned(OnProgressEvent) then
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OnProgressEvent(self,false,1);
|
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try
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AnalyseLine(Lines[I]);
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except on E:Exception do
|
421 |
begin
|
422 |
Add2Log(E.Message);
|
423 |
Result := false;
|
424 |
if StopOnFirstError then Exit;
|
425 |
ClearStatement;
|
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FLastSymbol := sqNone;
|
427 |
end
|
428 |
end;
|
429 |
end;
|
430 |
if FState <> stInit then
|
431 |
AnalyseLine(';');
|
432 |
Result := (FStackIndex = 0) and (FState = stInit)
|
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end;
|
434 |
|
435 |
constructor TIBXScript.Create(aOwner: TComponent);
|
436 |
begin
|
437 |
inherited;
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438 |
FStopOnFirstError := true;
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439 |
FEcho := true;
|
440 |
FState := stInit;
|
441 |
FISQL := TIBSQL.Create(self);
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442 |
FISQL.ParamCheck := true;
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FInternalTransaction := TIBTransaction.Create(self);
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444 |
FInternalTransaction.Params.Clear;
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445 |
FInternalTransaction.Params.Add('concurrency');
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FInternalTransaction.Params.Add('wait');
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ClearStatement;
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end;
|
449 |
|
450 |
destructor TIBXScript.Destroy;
|
451 |
begin
|
452 |
if FISQL <> nil then FISQL.Free;
|
453 |
if FInternalTransaction <> nil then FInternalTransaction.Free;
|
454 |
inherited;
|
455 |
end;
|
456 |
|
457 |
procedure TIBXScript.DoCommit;
|
458 |
begin
|
459 |
with GetTransaction do
|
460 |
if InTransaction then Commit;
|
461 |
if not GetTransaction.InTransaction then
|
462 |
GetTransaction.StartTransaction;
|
463 |
ClearStatement;
|
464 |
end;
|
465 |
|
466 |
procedure TIBXScript.DoReconnect;
|
467 |
begin
|
468 |
with GetTransaction do
|
469 |
if InTransaction then Commit;
|
470 |
Database.Connected := false;
|
471 |
Database.Connected := true;
|
472 |
if not GetTransaction.InTransaction then
|
473 |
GetTransaction.StartTransaction;
|
474 |
ClearStatement;
|
475 |
end;
|
476 |
|
477 |
procedure TIBXScript.ExecSQL;
|
478 |
var DDL: boolean;
|
479 |
I: integer;
|
480 |
begin
|
481 |
if FSQLText <> '' then
|
482 |
begin
|
483 |
if ProcessSetStatement(FSQLText) then {Handle Set Statement}
|
484 |
begin
|
485 |
ClearStatement;
|
486 |
Exit;
|
487 |
end;
|
488 |
|
489 |
FISQL.SQL.Text := FSQLText;
|
490 |
FISQL.Transaction := GetTransaction;
|
491 |
with FISQL.Transaction do
|
492 |
if not InTransaction then StartTransaction;
|
493 |
FISQL.ParamCheck := not FHasBegin; {Probably PSQL}
|
494 |
FISQL.Prepare;
|
495 |
if FISQL.SQLType in [SQLInsert, SQLUpdate, SQLDelete] then
|
496 |
begin
|
497 |
{Interpret parameters}
|
498 |
for I := 0 to FISQL.Params.Count - 1 do
|
499 |
SetParamValue(FISQL.Params[I]);
|
500 |
end;
|
501 |
|
502 |
if FISQL.SQLType = SQLSelect then
|
503 |
begin
|
504 |
if assigned(OnSelectSQL) then
|
505 |
OnSelectSQL(self,FSQLText)
|
506 |
else
|
507 |
raise Exception.Create(sNoSelectSQL);
|
508 |
end
|
509 |
else
|
510 |
begin
|
511 |
DDL := FISQL.SQLType = SQLDDL;
|
512 |
if not DDL or not FIgnoreGrants or (Pos('GRANT',AnsiUpperCase(Trim(FSQLText))) <> 1) then
|
513 |
FISQL.ExecQuery;
|
514 |
if FAutoDDL and DDL then
|
515 |
FISQL.Transaction.Commit;
|
516 |
FISQL.Close;
|
517 |
end;
|
518 |
FISQL.SQL.Clear;
|
519 |
ClearStatement;
|
520 |
end
|
521 |
end;
|
522 |
|
523 |
|
524 |
|
525 |
function TIBXScript.GetNextSymbol(C: char): TSQLSymbol;
|
526 |
begin
|
527 |
if C = FTerminator then
|
528 |
Result := sqTerminator
|
529 |
else
|
530 |
case C of
|
531 |
' ',#9:
|
532 |
Result := sqSpace;
|
533 |
';':
|
534 |
Result := sqSemiColon;
|
535 |
'"':
|
536 |
Result := sqDoubleQuotes;
|
537 |
'''':
|
538 |
Result := sqSingleQuotes;
|
539 |
'/':
|
540 |
Result := sqForwardSlash;
|
541 |
'*':
|
542 |
Result := sqAsterisk;
|
543 |
else
|
544 |
begin
|
545 |
Result := sqString;
|
546 |
FLastChar := C
|
547 |
end
|
548 |
end;
|
549 |
end;
|
550 |
|
551 |
function TIBXScript.GetSymbol(const Line: string; var index: integer): TSQLSymbol;
|
552 |
begin
|
553 |
Result := sqNone;
|
554 |
if FLastSymbol <> sqNone then
|
555 |
begin
|
556 |
Result := FLastSymbol;
|
557 |
if Result = sqString then
|
558 |
FString := FLastChar;
|
559 |
FLastSymbol := sqNone
|
560 |
end;
|
561 |
|
562 |
while (index <= Length(Line)) and (FLastSymbol = sqNone) do
|
563 |
begin
|
564 |
FLastSymbol := GetNextSymbol(Line[index]);
|
565 |
{combine if possible}
|
566 |
case Result of
|
567 |
sqNone:
|
568 |
begin
|
569 |
Result := FLastSymbol;
|
570 |
if FLastSymbol = sqString then
|
571 |
FString := FLastChar;
|
572 |
FLastSymbol := sqNone
|
573 |
end;
|
574 |
|
575 |
sqForwardSlash:
|
576 |
if FLastSymbol = sqAsterisk then
|
577 |
begin
|
578 |
Result := sqCommentStart;
|
579 |
FLastSymbol := sqNone
|
580 |
end
|
581 |
else
|
582 |
if FLastSymbol = sqForwardSlash then
|
583 |
begin
|
584 |
Result := sqCommentLine;
|
585 |
FLastSymbol := sqNone
|
586 |
end;
|
587 |
|
588 |
sqAsterisk:
|
589 |
if FLastSymbol = sqForwardSlash then
|
590 |
begin
|
591 |
Result := sqCommentEnd;
|
592 |
FLastSymbol := sqNone
|
593 |
end;
|
594 |
|
595 |
sqString:
|
596 |
if FLastSymbol = sqString then
|
597 |
begin
|
598 |
FString := FString + FLastChar;
|
599 |
FLastSymbol := sqNone
|
600 |
end;
|
601 |
end;
|
602 |
Inc(index)
|
603 |
end;
|
604 |
|
605 |
if (index > Length(Line)) then
|
606 |
if Result = sqNone then
|
607 |
Result := sqEOL
|
608 |
else
|
609 |
if (FLastSymbol = sqNone) and (Result <> sqEOL) then
|
610 |
FLastSymbol := sqEOL;
|
611 |
|
612 |
if Result = sqString then
|
613 |
begin
|
614 |
if FString <> '' then
|
615 |
if CompareText(FString,'begin') = 0 then
|
616 |
Result := sqBegin
|
617 |
else
|
618 |
if CompareText(FString,'end') = 0 then
|
619 |
Result := sqEnd
|
620 |
else
|
621 |
if CompareText(FString,'declare') = 0 then
|
622 |
Result := sqDeclare
|
623 |
else
|
624 |
if CompareText(FString,'commit') = 0 then
|
625 |
Result := sqCommit
|
626 |
else
|
627 |
if CompareText(FString,'reconnect') = 0 then
|
628 |
Result := sqReconnect;
|
629 |
end
|
630 |
end;
|
631 |
|
632 |
function TIBXScript.GetTransaction: TIBTransaction;
|
633 |
begin
|
634 |
if FTransaction = nil then
|
635 |
Result := FInternalTransaction
|
636 |
else
|
637 |
Result := FTransaction;
|
638 |
end;
|
639 |
|
640 |
procedure TIBXScript.SetDatabase(AValue: TIBDatabase);
|
641 |
begin
|
642 |
if FDatabase = AValue then Exit;
|
643 |
FDatabase := AValue;
|
644 |
FISQL.Database := AValue;
|
645 |
FInternalTransaction.DefaultDatabase := AValue;
|
646 |
end;
|
647 |
|
648 |
function TIBXScript.PerformUpdate(const SQLFile: string;
|
649 |
AutoDDL: boolean): boolean;
|
650 |
var F: TFileStream;
|
651 |
begin
|
652 |
F := TFileStream.Create(SQLFile,fmOpenRead or fmShareDenyNone);
|
653 |
try
|
654 |
Result := PerformUpdate(F,AutoDDL)
|
655 |
finally
|
656 |
F.Free
|
657 |
end;
|
658 |
end;
|
659 |
|
660 |
function TIBXScript.PerformUpdate(const SQLStream: TStream; AutoDDL: boolean): boolean;
|
661 |
var Lines: TStringList;
|
662 |
FNotConnected: boolean;
|
663 |
begin
|
664 |
FTerminator := ';';
|
665 |
FAutoDDL := AutoDDL;
|
666 |
FNotConnected := not Database.Connected;
|
667 |
Database.Connected := true;
|
668 |
try
|
669 |
Lines := TStringList.Create;
|
670 |
Lines.LoadFromStream(SQLStream);
|
671 |
try
|
672 |
if assigned(OnProgressEvent) then
|
673 |
OnProgressEvent(self,true,Lines.Count);
|
674 |
|
675 |
Result := AnalyseSQL(Lines)
|
676 |
finally
|
677 |
Lines.Free
|
678 |
end;
|
679 |
except on E:Exception do
|
680 |
begin
|
681 |
Add2Log(E.Message);
|
682 |
with GetTransaction do
|
683 |
if InTransaction then Rollback;
|
684 |
Result := false
|
685 |
end
|
686 |
end;
|
687 |
with GetTransaction do
|
688 |
if InTransaction then Commit;
|
689 |
if FNotConnected then
|
690 |
Database.Connected := false;
|
691 |
end;
|
692 |
|
693 |
function TIBXScript.PopState: TSQLStates;
|
694 |
begin
|
695 |
if FStackIndex = 0 then
|
696 |
raise Exception.Create(sStackUnderflow);
|
697 |
Dec(FStackIndex);
|
698 |
Result := FStack[FStackIndex]
|
699 |
end;
|
700 |
|
701 |
function TIBXScript.ProcessSetStatement(stmt: string): boolean;
|
702 |
var RegexObj: TRegExpr;
|
703 |
begin
|
704 |
Result := false;
|
705 |
RegexObj := TRegExpr.Create;
|
706 |
try
|
707 |
{Process Set Term}
|
708 |
RegexObj.Expression := 'SET +TERM +(.) *(\' + FTerminator + '|)';
|
709 |
if RegexObj.Exec(AnsiUpperCase(stmt)) then
|
710 |
begin
|
711 |
FTerminator := RegexObj.Match[1][1];
|
712 |
Result := true;
|
713 |
Exit;
|
714 |
end;
|
715 |
|
716 |
{Process AutoDDL}
|
717 |
RegexObj.Expression := 'SET +AUTODDL +([a-zA-Z]+) *(\' + FTerminator + '|)';
|
718 |
if RegexObj.Exec(AnsiUpperCase(stmt)) then
|
719 |
begin
|
720 |
if AnsiUpperCase(RegexObj.Match[1]) = 'ON' then
|
721 |
FAutoDDL := true
|
722 |
else
|
723 |
if AnsiUpperCase(RegexObj.Match[1]) = 'OFF' then
|
724 |
FAutoDDL := false
|
725 |
else
|
726 |
raise Exception.CreateFmt(sInvalidAutoDDL, [RegexObj.Match[0]]);
|
727 |
|
728 |
Result := true;
|
729 |
end;
|
730 |
finally
|
731 |
RegexObj.Free;
|
732 |
end;
|
733 |
end;
|
734 |
|
735 |
|
736 |
procedure TIBXScript.SetParamValue(SQLVar: TIBXSQLVAR);
|
737 |
var BlobID: TISC_QUAD;
|
738 |
begin
|
739 |
if assigned(FGetParamValue) and (SQLVar.SQLType = SQL_BLOB) then
|
740 |
begin
|
741 |
Add2Log(Format(sResolveQueryParam,[SQLVar.Name]));
|
742 |
GetParamValue(self,SQLVar.Name,BlobID);
|
743 |
if (BlobID.gds_quad_high = 0) and (BlobID.gds_quad_low = 0) then
|
744 |
SQLVar.Clear
|
745 |
else
|
746 |
SQLVar.AsQuad := BlobID
|
747 |
end
|
748 |
else
|
749 |
raise Exception.Create(sNoParamQueries);
|
750 |
end;
|
751 |
|
752 |
procedure TIBXScript.SetState(AState: TSQLStates);
|
753 |
begin
|
754 |
if FStackIndex > 16 then
|
755 |
raise Exception.Create(sStackOverFlow);
|
756 |
FStack[FStackIndex] := FState;
|
757 |
Inc(FStackIndex);
|
758 |
FState := AState
|
759 |
end;
|
760 |
|
761 |
procedure TIBXScript.ClearStatement;
|
762 |
begin
|
763 |
FSQLText := '';
|
764 |
FState := stInit;
|
765 |
FHasBegin := false;
|
766 |
FLastChar := ' ';
|
767 |
FLastSymbol := sqNone;
|
768 |
end;
|
769 |
|
770 |
end.
|
771 |
|