/*
* If we have an ORDER BY, transform it. This will add columns to the
* tlist if they appear in ORDER BY but weren't already in the arg list.
* They will be marked resjunk = true so we can tell them apart from
* regular aggregate arguments later.
*
* We need to mess with p_next_resno since it will be used to number any
* new targetlist entries.
*/
save_next_resno = pstate->p_next_resno;
pstate->p_next_resno = attno;
torder = transformSortClause(pstate,
aggorder,
&tlist,
true /* fix unknowns */ ,
true /* force SQL99 rules */ );
/*
* If we have DISTINCT, transform that to produce a distinctList.
*/
if (agg_distinct)
{
tdistinct = transformDistinctClause(pstate, &tlist, torder, true);
/*
* Remove this check if executor support for hashed distinct for
* aggregates is ever added.
*/
foreach(lc, tdistinct)
/*
* If we have an ORDER BY, transform it. This will add columns to the
* tlist if they appear in ORDER BY but weren't already in the arg list.
* They will be marked resjunk = true so we can tell them apart from
* regular aggregate arguments later.
*
* We need to mess with p_next_resno since it will be used to number any
* new targetlist entries.
*/
save_next_resno = pstate->p_next_resno;
pstate->p_next_resno = attno;
torder = transformSortClause(pstate,
aggorder,
&tlist,
EXPR_KIND_ORDER_BY,
true /* fix unknowns */ ,
true /* force SQL99 rules */ );
/*
* If we have DISTINCT, transform that to produce a distinctList.
*/
if (agg_distinct)
{
tdistinct = transformDistinctClause(pstate, &tlist, torder, true);
/*
* Remove this check if executor support for hashed distinct for
* aggregates is ever added.
*/
foreach(lc, tdistinct)