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Remove ExprMentionsPartitionColumn function and simplify partition column checks for PostgreSQL 18 compatibility

Mehmet Yilmaz 2025-06-27 08:50:21 +00:00
parent b3888e02ad
commit fdec8eab30
1 changed files with 3 additions and 91 deletions
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94
src/backend/distributed/planner/multi_logical_planner.c
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@ -136,9 +136,6 @@ static MultiNode * ApplyCartesianProductReferenceJoin(MultiNode *leftNode,
static MultiNode * ApplyCartesianProduct(MultiNode *leftNode, MultiNode *rightNode,
List *partitionColumnList, JoinType joinType,
List *joinClauses);
#if PG_VERSION_NUM >= PG_VERSION_18
static bool ExprMentionsPartitionColumn(Node *node, Query *query);
#endif
/*
@ -227,21 +224,9 @@ TargetListOnPartitionColumn(Query *query, List *targetEntryList)
TargetEntry *targetEntry = (TargetEntry *) lfirst(targetEntryCell);
Expr *targetExpression = targetEntry->expr;
bool isPartitionColumn;
bool skipOuterVars = false;
#if PG_VERSION_NUM >= PG_VERSION_18
isPartitionColumn =
ExprMentionsPartitionColumn((Node *) targetExpression, query);
#else
{
skipOuterVars = true;
isPartitionColumn =
IsPartitionColumn(targetExpression, query, skipOuterVars);
}
#endif
bool skipOuterVars = true;
bool isPartitionColumn = IsPartitionColumn(targetExpression, query,
skipOuterVars);
Var *column = NULL;
RangeTblEntry *rte = NULL;
@ -307,79 +292,6 @@ TargetListOnPartitionColumn(Query *query, List *targetEntryList)
}
#if PG_VERSION_NUM >= PG_VERSION_18
/*
* ExprMentionsPartitionColumn
*
* Return true iff `node` ultimately resolves to the partition column of
* *any* distributed table referenced by `query`.
*
* • Understands OUTER_VAR indirection (PG ≥ 17)
* • Understands synthetic RTE_GROUP entries (PG ≥ 18)
* • Falls back to original logic for PG 15/16 automatically
*/
static bool
ExprMentionsPartitionColumn(Node *node, Query *query)
{
if (node == NULL)
{
return false;
}
if (IsA(node, Var))
{
Var *v = (Var *) node;
/* Follow OUTER_VAR → target-list indirection, if present */
if (v->varno == OUTER_VAR)
{
TargetEntry *tle = get_tle_by_resno(query->targetList, v->varattno);
return tle && ExprMentionsPartitionColumn((Node *) tle->expr, query);
}
/* Sanity-check varno */
if (v->varno <= 0 || v->varno > list_length(query->rtable))
{
return false;
}
RangeTblEntry *rte = rt_fetch(v->varno, query->rtable);
#if PG_VERSION_NUM >= PG_VERSION_18
/* Synthetic GROUP RTE – examine its expressions instead */
if (rte->rtekind == RTE_GROUP && rte->groupexprs)
{
ListCell *lc;
foreach(lc, rte->groupexprs)
if (ExprMentionsPartitionColumn((Node *) lfirst(lc), query))
{
return true;
}
return false;
}
#endif
/* Real table? — compare against its dist key */
if (rte->rtekind == RTE_RELATION && HasDistributionKey(rte->relid))
{
Var *partcol = DistPartitionKey(rte->relid);
return partcol && partcol->varattno == v->varattno;
}
return false;
}
/* Recurse through any other node type */
return expression_tree_walker(node,
ExprMentionsPartitionColumn,
(void *) query);
}
#endif
/*
* FindNodeMatchingCheckFunctionInRangeTableList finds a node for which the checker
* function returns true.