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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) 2017 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 IBDataOutput;
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{$mode objfpc}{$H+}
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{$codepage UTF8}
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(*
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These are helper components, primarily for use with TIBXScript, but which are
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also used by TIBExtact (for formatting data as SQL Insert statements). Their
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purpose is to execute SQL SELECT statements and to format the results of the
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query. Data Output Formatters are currently available for:
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Block Format Output (TIBBlockFormatOut)
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CSV Format (TIBCSVDataOut)
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SQL Insert Statements (TIBInsertStmtsOut).
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*)
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interface
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uses
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Classes, SysUtils, IBSQL, IBDatabase, IB;
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const
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MaxBlobText = 80;
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sTimeStampFormat = 'yyyy.mm.dd hh:nn:ss.zzz';
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sDateFormat = 'yyyy.mm.dd';
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sTimeFormat = 'hh:nn:ss.zzz';
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type
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TPlanOptions = (poNoPlan,poIncludePlan, poPlanOnly);
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TAdd2Log = procedure(const Msg: string; IsError: boolean=true) of object;
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{ TIBCustomDataOutput }
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TIBCustomDataOutput = class(TComponent)
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private
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FIBSQL: TIBSQL;
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FIncludeHeader: Boolean;
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FPlanOptions: TPlanOptions;
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FRowCount: integer;
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FShowPerformanceStats: boolean;
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function GetDatabase: TIBDatabase;
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function GetTransaction: TIBTransaction;
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procedure SetDatabase(AValue: TIBDatabase);
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procedure SetTransaction(AValue: TIBTransaction);
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protected
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procedure HeaderOut(Add2Log: TAdd2Log); virtual;
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procedure FormattedDataOut(Add2Log: TAdd2Log); virtual; abstract;
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procedure TrailerOut(Add2Log: TAdd2Log); virtual;
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property IncludeHeader: Boolean read FIncludeHeader write FIncludeHeader default true;
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public
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constructor Create(aOwner: TComponent); override;
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procedure Assign(Source: TPersistent); override;
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function DataOut(SelectQuery: string; Add2Log: TAdd2Log): boolean;
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procedure SetCommand(command, aValue, stmt: string; var Done: boolean); virtual;
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class procedure ShowPerfStats(Statement: IStatement; Add2Log: TAdd2Log);
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published
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property Database: TIBDatabase read GetDatabase write SetDatabase;
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property Transaction: TIBTransaction read GetTransaction write SetTransaction;
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property PlanOptions: TPlanOptions read FPlanOptions write FPlanOptions;
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property RowCount: integer read FRowCount write FRowCount;
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property ShowPerformanceStats: boolean read FShowPerformanceStats write FShowPerformanceStats;
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end;
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TDataOutputFormatter = class of TIBCustomDataOutput;
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{ TIBCSVDataOut }
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TIBCSVDataOut = class(TIBCustomDataOutput)
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private
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FQuoteChar: char;
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protected
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procedure HeaderOut(Add2Log: TAdd2Log); override;
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procedure FormattedDataOut(Add2Log: TAdd2Log); override;
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public
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constructor Create(aOwner: TComponent); override;
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published
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property IncludeHeader;
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property QuoteChar: char read FQuoteChar write FQuoteChar default '''';
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end;
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{ TIBInsertStmtsOut }
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TIBInsertStmtsOut = class(TIBCustomDataOutput)
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private
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FIncludeBlobsAndArrays: boolean;
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FInsertHeader: string;
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protected
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procedure HeaderOut(Add2Log: TAdd2Log); override;
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procedure FormattedDataOut(Add2Log: TAdd2Log); override;
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public
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constructor Create(aOwner: TComponent); override;
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published
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property IncludeBlobsAndArrays: boolean read FIncludeBlobsAndArrays
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write FIncludeBlobsAndArrays default true;
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end;
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TAlignments = (taLeft, taCentre, taRight);
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{ TIBBlockFormatOut }
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TIBBlockFormatOut = class(TIBCustomDataOutput)
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private
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FColWidths: array of integer;
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FRowWidth: integer;
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function DashedLine: string;
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function TextAlign(s: string; ColWidth: integer; alignment: TAlignments
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): string;
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protected
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procedure HeaderOut(Add2Log: TAdd2Log); override;
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procedure FormattedDataOut(Add2Log: TAdd2Log); override;
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procedure TrailerOut(Add2Log: TAdd2Log); override;
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published
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property IncludeHeader;
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end;
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implementation
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uses IBUtils, FBMessages, Math, IBXScript;
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{ TIBBlockFormatOut }
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function TIBBlockFormatOut.DashedLine: string;
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var i: integer;
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begin
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Setlength(Result,FRowWidth);
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for i := 1 to FRowWidth do
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Result[i] := '-';
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end;
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function TIBBlockFormatOut.TextAlign(s: string; ColWidth: integer;
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alignment: TAlignments): string;
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begin
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SetLength(Result,ColWidth);
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FillChar(Result[1],ColWidth,' ');
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if Length(s) > ColWidth then
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s := LeftStr(s,ColWidth);
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case alignment of
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taLeft:
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Move(s[1],Result[1],Length(s));
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taCentre:
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Move(s[1],Result[(ColWidth - Length(s)) div 2 + 1],Length(s));
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taRight:
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Move(s[1],Result[ColWidth - Length(s) + 1],Length(s));
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end;
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end;
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procedure TIBBlockFormatOut.HeaderOut(Add2Log: TAdd2Log);
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var i: integer;
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s: string;
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begin
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with FIBSQL do
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begin
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{Calculate column Widths}
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SetLength(FColWidths,MetaData.Count);
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FRowWidth := 1; {assume leading '|'}
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for i := 0 to MetaData.Count - 1 do
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with MetaData[i] do
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begin
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case SQLType of
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SQL_VARYING, SQL_TEXT:
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FColWidths[i] := GetSize;
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SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT:
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FColWidths[i] := 18; {see http://www.freepascal.org/docs-html/rtl/sysutils/formatfloat.html}
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SQL_LONG:
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if Scale = 0 then
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FColWidths[i] := 12 {allow for minus sign}
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else
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FColWidths[i] := 13; {leave room for the decimal point}
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SQL_SHORT:
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if Scale = 0 then
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FColWidths[i] := 6 {allow for minus sign}
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else
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FColWidths[i] := 7; {leave room for the decimal point}
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SQL_INT64:
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if Scale = 0 then
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FColWidths[i] := 20 {allow for minus sign}
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else
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FColWidths[i] := 21; {leave room for the decimal point}
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SQL_TIMESTAMP:
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FColWidths[i] := 23;
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SQL_TYPE_DATE:
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FColWidths[i] := 10;
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SQL_TYPE_TIME:
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FColWidths[i] := 12;
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SQL_BLOB:
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if SQLSubType = 1 then
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FColWidths[i] := MaxBlobText
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else
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FColWidths[i] := length(SBlob);
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SQL_ARRAY:
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FColWidths[i] := length(SArray);
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SQL_BOOLEAN:
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FColWidths[i] := Max(Length(STrue),Length(SFalse));
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end;
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if FColWidths[i] < Length(Name) then
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FColWidths[i] := Length(Name);
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FRowWidth += FColWidths[i] + 1;
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end;
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{Now output the header}
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Add2Log(DashedLine);
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s := '|';
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for i := 0 to MetaData.Count - 1 do
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s += TextAlign(MetaData[i].Name,FColWidths[i],taCentre) + '|';
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Add2Log(s);
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Add2Log(DashedLine);
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end;
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end;
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procedure TIBBlockFormatOut.FormattedDataOut(Add2Log: TAdd2Log);
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function TruncateTextBlob(textStr: string): string;
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begin
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if Length(textStr) > MaxBlobText then
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Result := LeftStr(textStr,MaxBlobText-3) + '...'
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else
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Result := textStr;
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end;
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var i: integer;
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s: string;
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begin
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s := '|';
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for i := 0 to FIBSQL.Current.Count - 1 do
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with FIBSQL.Current[i] do
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begin
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if IsNull then
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s += TextAlign('NULL',FColWidths[i],taCentre)
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else
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case SQLType of
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SQL_VARYING, SQL_TEXT:
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s += TextAlign(AsString,FColWidths[i],taLeft);
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SQL_TIMESTAMP:
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s += TextAlign(FormatDateTime(sTimeStampFormat,AsDateTime),FColWidths[i],taLeft);
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SQL_TYPE_DATE:
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s += TextAlign(FormatDateTime(sDateFormat,AsDateTime),FColWidths[i],taLeft);
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SQL_TYPE_TIME:
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s += TextAlign(FormatDateTime(sTimeFormat,AsDateTime),FColWidths[i],taLeft);
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SQL_DOUBLE, SQL_FLOAT, SQL_D_FLOAT,
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SQL_LONG, SQL_SHORT, SQL_INT64:
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s += TextAlign(AsString,FColWidths[i],taRight);
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SQL_BOOLEAN, SQL_ARRAY:
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s += TextAlign(AsString,FColWidths[i],taCentre);
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SQL_BLOB:
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if SQLSubType = 1 then
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s += TextAlign(TruncateTextBlob(AsString),FColWidths[i],taLeft)
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else
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s += TextAlign(sBlob,FColWidths[i],taCentre);
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end;
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s += '|';
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end;
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Add2Log(s);
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Add2Log(DashedLine);
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end;
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procedure TIBBlockFormatOut.TrailerOut(Add2Log: TAdd2Log);
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begin
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Add2Log(DashedLine);
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end;
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{ TIBInsertStmtsOut }
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procedure TIBInsertStmtsOut.HeaderOut(Add2Log: TAdd2Log);
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var TableName: string;
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i,j: integer;
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begin
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TableName := trim(FIBSQL.GetUniqueRelationName);
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if TableName = '' then
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IBError(ibxeUniqueRelationReqd,[nil]);
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Add2Log('');
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Add2Log('/* Inserting data into Table: ' + TableName + ' */');
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Add2Log('');
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FInsertHeader := 'INSERT INTO ' + QuoteIdentifier(Database.SQLDialect, TableName) + ' (';
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with FIBSQL do
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begin
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j := 0;
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for i := 0 to MetaData.Count - 1 do
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if IncludeBlobsAndArrays or
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((MetaData[i].SQLTYPE <> SQL_BLOB) and (MetaData[i].SQLType <> SQL_ARRAY)) then
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begin
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if j <> 0 then FInsertHeader += ',';
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FInsertHeader += QuoteIdentifierIfNeeded(Database.SQLDialect,Trim(MetaData[i].getAliasName));
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Inc(j);
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end;
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end;
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FInsertHeader += ') VALUES(';
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end;
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procedure TIBInsertStmtsOut.FormattedDataOut(Add2Log: TAdd2Log);
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const
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QuoteChar = '''';
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var s: string;
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i, j: integer;
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ar: IArray;
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begin
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s := FInsertHeader;
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with FIBSQL do
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begin
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j := 0;
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for i := 0 to Current.Count - 1 do
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if IncludeBlobsAndArrays or
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((Current[i].SQLTYPE <> SQL_BLOB) and (Current[i].SQLType <> SQL_ARRAY)) then
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begin
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if j <> 0 then s += ',';
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if Current[i].IsNull then
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s += 'NULL'
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else
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case Current[i].SQLType of
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SQL_BLOB:
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if Current[i].SQLSubType = 1 then
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begin
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if Current[i].getCharSetID = 1 {octets} then
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s += Format('x''%s''',[StringToHex(Current[i].AsString)])
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else
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s += QuoteChar + SQLSafeString(Current[i].AsString) + QuoteChar
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end
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else
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s += TIBXMLProcessor.FormatBlob(Current[i]);
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SQL_ARRAY:
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begin
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ar := Current[i].AsArray;
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if ar = nil then
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s += 'NULL'
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else
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s += TIBXMLProcessor.FormatArray(Database,ar);
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end;
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SQL_TEXT, SQL_VARYING:
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if Current[i].getCharSetID = 1 {octets} then
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s += Format('x''%s''',[StringToHex(Current[i].AsString)])
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else
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s += QuoteChar + SQLSafeString(Current[i].AsString) + QuoteChar;
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SQL_TIMESTAMP:
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s += QuoteChar + FormatDateTime(sTimeStampFormat,Current[i].AsDateTime) + QuoteChar;
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SQL_TYPE_DATE:
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s += QuoteChar + FormatDateTime(sDateFormat,Current[i].AsDateTime) + QuoteChar;
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SQL_TYPE_TIME:
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s += QuoteChar + FormatDateTime(sTimeFormat,Current[i].AsDateTime) + QuoteChar;
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else
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s += Current[i].AsString;
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end;
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Inc(j);
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end;
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end;
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s += ');';
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Add2Log(s);
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end;
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constructor TIBInsertStmtsOut.Create(aOwner: TComponent);
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begin
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inherited Create(aOwner);
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FIncludeBlobsAndArrays := true;
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end;
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405 |
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{ TIBCSVDataOut }
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procedure TIBCSVDataOut.HeaderOut(Add2Log: TAdd2Log);
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var i: integer;
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s: string;
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begin
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s := '';
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for i := 0 to FIBSQL.MetaData.Count - 1 do
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begin
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if i <> 0 then s += ',';
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s += FIBSQL.MetaData[i].getAliasName;
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end;
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Add2Log(s);
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end;
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420 |
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procedure TIBCSVDataOut.FormattedDataOut(Add2Log: TAdd2Log);
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var i: integer;
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s: string;
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begin
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s := '';
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with FIBSQL do
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begin
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for i := 0 to Current.Count - 1 do
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with Current[i] do
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begin
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if i <> 0 then s += ',';
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case SQLType of
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SQL_BLOB:
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if SQLSubType <> 1 then
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s += sBlob
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else
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s += QuoteChar + Current[i].AsString + QuoteChar;
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SQL_VARYING,SQL_TEXT,
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SQL_TIMESTAMP,SQL_TYPE_DATE,SQL_TYPE_TIME:
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s += QuoteChar + Current[i].AsString + QuoteChar;
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else
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s += Current[i].AsString;
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end;
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end;
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end;
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Add2Log(s);
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end;
|
450 |
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constructor TIBCSVDataOut.Create(aOwner: TComponent);
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begin
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inherited Create(aOwner);
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FQuoteChar := '''';
|
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end;
|
456 |
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{ TIBCustomDataOutput }
|
458 |
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function TIBCustomDataOutput.GetDatabase: TIBDatabase;
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begin
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Result := FIBSQL.Database;
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end;
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463 |
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function TIBCustomDataOutput.GetTransaction: TIBTransaction;
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begin
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Result := FIBSQL.Transaction;
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end;
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procedure TIBCustomDataOutput.SetDatabase(AValue: TIBDatabase);
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begin
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FIBSQL.Database := AValue;
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end;
|
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procedure TIBCustomDataOutput.SetTransaction(AValue: TIBTransaction);
|
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begin
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FIBSQL.Transaction := AValue;
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end;
|
478 |
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procedure TIBCustomDataOutput.HeaderOut(Add2Log: TAdd2Log);
|
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begin
|
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//stub
|
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end;
|
483 |
|
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procedure TIBCustomDataOutput.TrailerOut(Add2Log: TAdd2Log);
|
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begin
|
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//stub
|
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end;
|
488 |
|
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constructor TIBCustomDataOutput.Create(aOwner: TComponent);
|
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begin
|
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inherited Create(aOwner);
|
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FIBSQL := TIBSQL.Create(self);
|
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FIncludeHeader := true;
|
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end;
|
495 |
|
496 |
procedure TIBCustomDataOutput.Assign(Source: TPersistent);
|
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begin
|
498 |
if Source is TIBCustomDataOutput then
|
499 |
begin
|
500 |
IncludeHeader := TIBCustomDataOutput(Source).IncludeHeader;
|
501 |
RowCount := TIBCustomDataOutput(Source).RowCount;
|
502 |
ShowPerformanceStats := TIBCustomDataOutput(Source).ShowPerformanceStats;
|
503 |
PlanOptions := TIBCustomDataOutput(Source).PlanOptions;
|
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end;
|
505 |
end;
|
506 |
|
507 |
function TIBCustomDataOutput.DataOut(SelectQuery: string; Add2Log: TAdd2Log
|
508 |
): boolean;
|
509 |
var Count: integer;
|
510 |
begin
|
511 |
FIBSQL.SQL.Text := SelectQuery;
|
512 |
FIBSQL.Prepare;
|
513 |
FIBSQL.Statement.EnableStatistics(ShowPerformanceStats);
|
514 |
if PlanOptions <> poNoPlan then
|
515 |
Add2Log(FIBSQL.Plan);
|
516 |
if PlanOptions = poPlanOnly then
|
517 |
Exit;
|
518 |
|
519 |
Count := 0;
|
520 |
FIBSQL.ExecQuery;
|
521 |
try
|
522 |
if IncludeHeader and not FIBSQL.EOF then
|
523 |
HeaderOut(Add2Log);
|
524 |
while (not FIBSQL.EOF) and ((FRowCount = 0) or (Count < FRowCount)) do
|
525 |
begin
|
526 |
FormattedDataOut(Add2Log);
|
527 |
FIBSQL.Next;
|
528 |
Inc(Count);
|
529 |
end;
|
530 |
ShowPerfStats(FIBSQL.Statement,Add2Log);
|
531 |
finally
|
532 |
FIBSQL.Close;
|
533 |
end;
|
534 |
Result := Count > 0;
|
535 |
end;
|
536 |
|
537 |
procedure TIBCustomDataOutput.SetCommand(command, aValue, stmt: string;
|
538 |
var Done: boolean);
|
539 |
|
540 |
function Toggle(aValue: string): boolean;
|
541 |
begin
|
542 |
aValue := AnsiUpperCase(aValue);
|
543 |
if aValue = 'ON' then
|
544 |
Result := true
|
545 |
else
|
546 |
if aValue = 'OFF' then
|
547 |
Result := false
|
548 |
else
|
549 |
raise Exception.CreateFmt(sInvalidSetStatement, [command,stmt]);
|
550 |
end;
|
551 |
|
552 |
begin
|
553 |
done := true;
|
554 |
if command = 'HEADING' then
|
555 |
FIncludeHeader := ((aValue = '') and not FIncludeHeader) or
|
556 |
((aValue <> '') and Toggle(aValue))
|
557 |
else
|
558 |
if command = 'ROWCOUNT' then
|
559 |
FRowCount := StrToInt(aValue)
|
560 |
else
|
561 |
if command = 'PLAN' then
|
562 |
begin
|
563 |
if aValue = '' then
|
564 |
begin
|
565 |
if FPlanOptions <> poIncludePlan then
|
566 |
FPlanOptions := poIncludePlan
|
567 |
else
|
568 |
FPlanOptions := poNoPlan;
|
569 |
end
|
570 |
else
|
571 |
if Toggle(aValue) then
|
572 |
FPlanOptions := poIncludePlan
|
573 |
else
|
574 |
FPlanOptions := poNoPlan;
|
575 |
end
|
576 |
else
|
577 |
if command = 'PLANONLY' then
|
578 |
begin
|
579 |
if aValue = '' then
|
580 |
begin
|
581 |
if FPlanOptions <> poPlanOnly then
|
582 |
FPlanOptions := poPlanOnly
|
583 |
else
|
584 |
FPlanOptions := poNoPlan;
|
585 |
end
|
586 |
else
|
587 |
if Toggle(aValue) then
|
588 |
FPlanOptions := poPlanOnly
|
589 |
else
|
590 |
if FPlanOptions <> poIncludePlan then
|
591 |
FPlanOptions := poNoPlan;
|
592 |
end
|
593 |
else
|
594 |
done := false;
|
595 |
end;
|
596 |
|
597 |
class procedure TIBCustomDataOutput.ShowPerfStats(Statement: IStatement;
|
598 |
Add2Log: TAdd2Log);
|
599 |
var stats: TPerfCounters;
|
600 |
begin
|
601 |
if Statement.GetPerfStatistics(stats) then
|
602 |
begin
|
603 |
Add2Log(Format('Current memory = %d',[stats[psCurrentMemory]]));
|
604 |
Add2Log(Format('Delta memory = %d',[stats[psDeltaMemory]]));
|
605 |
Add2Log(Format('Max memory = %d',[stats[psMaxMemory]]));
|
606 |
Add2Log('Elapsed time= ' + FormatFloat('#0.000',stats[psRealTime]/1000) +' sec');
|
607 |
Add2Log('Cpu = ' + FormatFloat('#0.000',stats[psUserTime]/1000) + ' sec');
|
608 |
Add2Log(Format('Buffers = %d',[stats[psBuffers]]));
|
609 |
Add2Log(Format('Reads = %d',[stats[psReads]]));
|
610 |
Add2Log(Format('Writes = %d',[stats[psWrites]]));
|
611 |
Add2Log(Format('Fetches = %d',[stats[psFetches]]));
|
612 |
end;
|
613 |
end;
|
614 |
|
615 |
end.
|
616 |
|