mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-23 07:05:36 +03:00
b53c231ca6
This patch improves handling of NULLs in textual fields in ColumnStore. Previously empty strings were considered NULLs and it could be a problem if data scheme allows for empty strings. It was also one of major reasons of behavior difference between ColumnStore and other engines in MariaDB family. Also, this patch fixes some other bugs and incorrect behavior, for example, incorrect comparison for "column <= ''" which evaluates to constant True for all purposes before this patch.
52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
#include "functor_json.h"
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#include "functioncolumn.h"
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#include "constantcolumn.h"
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#include "rowgroup.h"
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using namespace execplan;
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using namespace rowgroup;
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#include "dataconvert.h"
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#include "jsonhelpers.h"
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using namespace funcexp::helpers;
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_json_exists::operationType(FunctionParm& fp,
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CalpontSystemCatalog::ColType& resultType)
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{
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return fp[0]->data()->resultType();
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}
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/**
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* getBoolVal API definition
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*/
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bool Func_json_exists::getBoolVal(Row& row, FunctionParm& fp, bool& isNull,
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CalpontSystemCatalog::ColType& type)
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{
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const auto js = fp[0]->data()->getStrVal(row, isNull);
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if (isNull)
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return false;
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int jsErr = 0;
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json_engine_t jsEg;
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initJSEngine(jsEg, getCharset(fp[0]), js);
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if (!path.parsed && parseJSPath(path, row, fp[1]))
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goto error;
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if (locateJSPath(jsEg, path, &jsErr))
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{
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if (jsErr)
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goto error;
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return false;
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}
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return true;
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error:
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isNull = true;
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return false;
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}
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} // namespace funcexp
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