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Create accessor functions for TupleHashEntry.

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Refactor for upcoming optimizations.

Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/1cc3b400a0e8eead18ff967436fa9e42c0c14cfb.camel@j-davis.com
This commit is contained in:
Jeff Davis
2025-03-24 22:05:41 -07:00
parent cc721c459d
commit 4d143509cb
6 changed files with 83 additions and 33 deletions
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14
src/backend/executor/execGrouping.c
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@@ -174,13 +174,15 @@ BuildTupleHashTable(PlanState *parent,
bool use_variable_hash_iv)
{
TupleHashTable hashtable;
Size entrysize = sizeof(TupleHashEntryData) + additionalsize;
Size entrysize;
Size hash_mem_limit;
MemoryContext oldcontext;
bool allow_jit;
uint32 hash_iv = 0;
Assert(nbuckets > 0);
additionalsize = MAXALIGN(additionalsize);
entrysize = sizeof(TupleHashEntryData) + additionalsize;
/* Limit initial table size request to not more than hash_mem */
hash_mem_limit = get_hash_memory_limit() / entrysize;
@@ -196,6 +198,7 @@ BuildTupleHashTable(PlanState *parent,
hashtable->tab_collations = collations;
hashtable->tablecxt = tablecxt;
hashtable->tempcxt = tempcxt;
hashtable->additionalsize = additionalsize;
hashtable->tableslot = NULL; /* will be made on first lookup */
hashtable->inputslot = NULL;
hashtable->in_hash_expr = NULL;
@@ -479,11 +482,14 @@ LookupTupleHashEntry_internal(TupleHashTable hashtable, TupleTableSlot *slot,
{
/* created new entry */
*isnew = true;
/* zero caller data */
entry->additional = NULL;
MemoryContextSwitchTo(hashtable->tablecxt);
/* Copy the first tuple into the table context */
entry->firstTuple = ExecCopySlotMinimalTuple(slot);
if (hashtable->additionalsize > 0)
entry->additional = palloc0(hashtable->additionalsize);
else
entry->additional = NULL;
}
}
else