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patternsel() was improperly stripping RelabelType from the derived 

expressions it constructed, causing scalarineqsel to become confused
if the underlying variable was of a domain type.  Per report from
Kevin Grittner.
This commit is contained in:
Tom Lane 2005-06-01 17:05:11 +00:00
parent 7148de1fa8
commit 1e85fa2008
1 changed files with 10 additions and 8 deletions
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18
src/backend/utils/adt/selfuncs.c
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@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.178 2005/04/25 01:30:14 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/selfuncs.c,v 1.179 2005/06/01 17:05:11 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -163,7 +163,7 @@ static void examine_variable(Query *root, Node *node, int varRelid,
static double get_variable_numdistinct(VariableStatData *vardata);
static bool get_variable_maximum(Query *root, VariableStatData *vardata,
Oid sortop, Datum *max);
static Selectivity prefix_selectivity(Query *root, VariableStatData *vardata,
static Selectivity prefix_selectivity(Query *root, Node *variable,
Oid opclass, Const *prefix);
static Selectivity pattern_selectivity(Const *patt, Pattern_Type ptype);
static Datum string_to_datum(const char *str, Oid datatype);
@ -812,6 +812,7 @@ patternsel(PG_FUNCTION_ARGS, Pattern_Type ptype)
List *args = (List *) PG_GETARG_POINTER(2);
int varRelid = PG_GETARG_INT32(3);
VariableStatData vardata;
Node *variable;
Node *other;
bool varonleft;
Datum constval;
@ -836,6 +837,7 @@ patternsel(PG_FUNCTION_ARGS, Pattern_Type ptype)
ReleaseVariableStats(vardata);
return DEFAULT_MATCH_SEL;
}
variable = (Node *) linitial(args);
/*
* If the constant is NULL, assume operator is strict and return zero,
@ -939,7 +941,7 @@ patternsel(PG_FUNCTION_ARGS, Pattern_Type ptype)
if (eqopr == InvalidOid)
elog(ERROR, "no = operator for opclass %u", opclass);
eqargs = list_make2(vardata.var, prefix);
eqargs = list_make2(variable, prefix);
result = DatumGetFloat8(DirectFunctionCall4(eqsel,
PointerGetDatum(root),
ObjectIdGetDatum(eqopr),
@ -958,7 +960,7 @@ patternsel(PG_FUNCTION_ARGS, Pattern_Type ptype)
Selectivity selec;
if (pstatus == Pattern_Prefix_Partial)
prefixsel = prefix_selectivity(root, &vardata, opclass, prefix);
prefixsel = prefix_selectivity(root, variable, opclass, prefix);
else
prefixsel = 1.0;
restsel = pattern_selectivity(rest, ptype);
@ -3694,7 +3696,7 @@ pattern_fixed_prefix(Const *patt, Pattern_Type ptype,
* more useful to use the upper-bound code than not.
*/
static Selectivity
prefix_selectivity(Query *root, VariableStatData *vardata,
prefix_selectivity(Query *root, Node *variable,
Oid opclass, Const *prefixcon)
{
Selectivity prefixsel;
@ -3706,7 +3708,7 @@ prefix_selectivity(Query *root, VariableStatData *vardata,
BTGreaterEqualStrategyNumber);
if (cmpopr == InvalidOid)
elog(ERROR, "no >= operator for opclass %u", opclass);
cmpargs = list_make2(vardata->var, prefixcon);
cmpargs = list_make2(variable, prefixcon);
/* Assume scalargtsel is appropriate for all supported types */
prefixsel = DatumGetFloat8(DirectFunctionCall4(scalargtsel,
PointerGetDatum(root),
@ -3728,7 +3730,7 @@ prefix_selectivity(Query *root, VariableStatData *vardata,
BTLessStrategyNumber);
if (cmpopr == InvalidOid)
elog(ERROR, "no < operator for opclass %u", opclass);
cmpargs = list_make2(vardata->var, greaterstrcon);
cmpargs = list_make2(variable, greaterstrcon);
/* Assume scalarltsel is appropriate for all supported types */
topsel = DatumGetFloat8(DirectFunctionCall4(scalarltsel,
PointerGetDatum(root),
@ -3743,7 +3745,7 @@ prefix_selectivity(Query *root, VariableStatData *vardata,
prefixsel = topsel + prefixsel - 1.0;
/* Adjust for double-exclusion of NULLs */
prefixsel += nulltestsel(root, IS_NULL, vardata->var, 0);
prefixsel += nulltestsel(root, IS_NULL, variable, 0);
/*
* A zero or slightly negative prefixsel should be converted into