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Pass collations to functions in FunctionCallInfoData, not FmgrInfo.

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Since collation is effectively an argument, not a property of the function,
FmgrInfo is really the wrong place for it; and this becomes critical in
cases where a cached FmgrInfo is used for varying purposes that might need
different collation settings.  Fix by passing it in FunctionCallInfoData
instead.  In particular this allows a clean fix for bug #5970 (record_cmp
not working).  This requires touching a bit more code than the original
method, but nobody ever thought that collations would not be an invasive
patch...
This commit is contained in:
Tom Lane
2011-04-12 19:19:24 -04:00
parent 88543ecfec
commit d64713df7e
49 changed files with 552 additions and 418 deletions
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10
src/backend/executor/nodeWindowAgg.c
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@ -81,6 +81,8 @@ typedef struct WindowStatePerFuncData
FmgrInfo flinfo; /* fmgr lookup data for window function */
Oid winCollation; /* collation derived for window function */
/*
* We need the len and byval info for the result of each function in order
* to know how to copy/delete values.
@ -289,6 +291,7 @@ advance_windowaggregate(WindowAggState *winstate,
*/
InitFunctionCallInfoData(*fcinfo, &(peraggstate->transfn),
numArguments + 1,
perfuncstate->winCollation,
(void *) winstate, NULL);
fcinfo->arg[0] = peraggstate->transValue;
fcinfo->argnull[0] = peraggstate->transValueIsNull;
@ -340,6 +343,7 @@ finalize_windowaggregate(WindowAggState *winstate,
FunctionCallInfoData fcinfo;
InitFunctionCallInfoData(fcinfo, &(peraggstate->finalfn), 1,
perfuncstate->winCollation,
(void *) winstate, NULL);
fcinfo.arg[0] = peraggstate->transValue;
fcinfo.argnull[0] = peraggstate->transValueIsNull;
@ -627,6 +631,7 @@ eval_windowfunction(WindowAggState *winstate, WindowStatePerFunc perfuncstate,
*/
InitFunctionCallInfoData(fcinfo, &(perfuncstate->flinfo),
perfuncstate->numArguments,
perfuncstate->winCollation,
(void *) perfuncstate->winobj, NULL);
/* Just in case, make all the regular argument slots be null */
memset(fcinfo.argnull, true, perfuncstate->numArguments);
@ -1561,9 +1566,10 @@ ExecInitWindowAgg(WindowAgg *node, EState *estate, int eflags)
fmgr_info_cxt(wfunc->winfnoid, &perfuncstate->flinfo,
econtext->ecxt_per_query_memory);
fmgr_info_set_collation(wfunc->inputcollid, &perfuncstate->flinfo);
fmgr_info_set_expr((Node *) wfunc, &perfuncstate->flinfo);
perfuncstate->winCollation = wfunc->inputcollid;
get_typlenbyval(wfunc->wintype,
&perfuncstate->resulttypeLen,
&perfuncstate->resulttypeByVal);
@ -1801,13 +1807,11 @@ initialize_peragg(WindowAggState *winstate, WindowFunc *wfunc,
&finalfnexpr);
fmgr_info(transfn_oid, &peraggstate->transfn);
fmgr_info_set_collation(wfunc->inputcollid, &peraggstate->transfn);
fmgr_info_set_expr((Node *) transfnexpr, &peraggstate->transfn);
if (OidIsValid(finalfn_oid))
{
fmgr_info(finalfn_oid, &peraggstate->finalfn);
fmgr_info_set_collation(wfunc->inputcollid, &peraggstate->finalfn);
fmgr_info_set_expr((Node *) finalfnexpr, &peraggstate->finalfn);
}