SQLITESTUDIO ZIP CODES CODE
This code is a highly simplified portion of a stage used in a complicated pipeline. ( 'Lines read: ' + LineCounter.ToString ) While not StreamToReadFrom.EndOfStream do StreamToReadFrom := TStreamReader.Create(MyUnZippedStream, False) MyUnZippedStream := TBufferedFileStream.Create('D:\variants.vcf', fmOpenRead) The file D:\variants.vcf is approximately 48.4 million bytes with 202K varying length lines of text that is not unicode MyUnzippedStream: TBufferedFileStream //TReadOnl圜achedFileStream<= faster than TBufferedFileStream, but still slower under FastMM5 Procedure TForm1.Button2Click(Sender: TObject) Hopefully, there's something I'm forgetting to do, and folks here can help. This matters, as I need to process thousands of these files, and it's been years since I've worked with Delphi. FastMM5 appears to be 15 percent slower than the regular in-built (FastMM?) memory manager that comes with Delphi 10.3.3. I'm a bit confused about my code with regard to FastMM5. I don't have 10.4 so not sure this still exists. (Change the FDQuery1 to remove the "+0" to see the error.) I think this is a bug, but cannot locate it in JIRA.Īttached is a quick and dirty example project. just adding a zero to Id), the error message goes away, and the CTE works correctly.ītw, this query works fine without the "+0" in other SQLite query processors (SQLiteStudio).
When executed a Firedac error message appears: Error: no such table column: example1_cte.Id.Īnd yet, if the line below the UNION ALL is changed to SELECT Id+0, (I.e. SELECT Id, No, TRIM(ParsedText) as ParsedText SUBSTR(Unparsed, INSTR(Unparsed, ',') + 1) SUBSTR(Unparsed, 0, INSTR(Unparsed, ',') ), No+1, - increment the counter for this row UNION ALL - "ALL" is not strictly necessary in this example The SQL Editor window assists users with SQL syntax hints & highlighting, provides pretty-print code formatter, and. It's safe, as anyone can review the source code.
SQLITESTUDIO ZIP CODES FREE
It's free of charge for everybody, for any purpose (including commercial). TextToParse || ',' as TextToParseWithTrailingComma A free, open-source, multi-platform SQLite database manager written in C++, with use of Qt framework. WITH RECURSIVE example1_cte (Id, No, ParsedText, Unparsed) AS In Delphi Rio 10.3.3 (I've not tested this on other versions) there seems to be a parsing bug with this recursive CTE:
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