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MCOL-1246 Fix string matching for whitespace

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For equality string matches other engines ignore trailing whitespace
(this does not apply to LIKE matches). So we should do the same. This
patch trims whitespace for MIN/MAX extent elimination checks, fixed
width columns and dictionary columns during equality matches against
constants (SELECT * FROM t1 WHERE b = 'ABC').
This commit is contained in:
Andrew Hutchings
2018-03-07 16:56:42 +00:00
parent 55e0ab2386
commit 17e954db7d
4 changed files with 34 additions and 2 deletions
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10
dbcon/joblist/lbidlist.cpp
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@ -27,6 +27,7 @@
#include "calpontsystemcatalog.h"
#include "brm.h"
#include "brmtypes.h"
#include "dataconvert.h"
#define IS_VERBOSE (fDebug >= 4)
#define IS_DETAIL (fDebug >= 3)
@ -653,7 +654,14 @@ bool LBIDList::CasualPartitionPredicate(const int64_t Min,
if (bIsChar && 1 < ct.colWidth)
{
scan = compareVal(order_swap(Min), order_swap(Max), order_swap(value),
// MCOL-1246 Trim trailing whitespace for matching so that we have
// the same as InnoDB behaviour
int64_t tMin = Min;
int64_t tMax = Max;
dataconvert::DataConvert::trimWhitespace(tMin);
dataconvert::DataConvert::trimWhitespace(tMax);
scan = compareVal(order_swap(tMin), order_swap(tMax), order_swap(value),
op, lcf);
// cout << "scan=" << (uint32_t) scan << endl;
}