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clean up codes

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This commit is contained in:
Takuma Hoshiai 2024-03-01 17:01:54 +09:00
parent b3603c776d
commit 6b9df6a8d5
2 changed files with 28 additions and 22 deletions
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15
createas.c
View file

@ -823,7 +823,7 @@ check_ivm_restriction_walker(Node *node, check_ivm_restriction_context *context)
if (IsA(lfirst(lc), Var))
{
Var *var = (Var *) lfirst(lc);
/* if system column, return error */
/* if the view has a system column, raise an error */
if (var->varattno < 0)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@ -831,7 +831,7 @@ check_ivm_restriction_walker(Node *node, check_ivm_restriction_context *context)
}
}
/* check if type in the top target list had an equality operator */
/* check that each type in the target list has an equality operator */
if (context->sublevels_up == 0)
{
foreach(lc, qry->targetList)
@ -902,6 +902,7 @@ check_ivm_restriction_walker(Node *node, check_ivm_restriction_context *context)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("VALUES is not supported on incrementally maintainable materialized view")));
if (rte->relkind == RELKIND_RELATION && isImmv(rte->relid))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@ -920,9 +921,11 @@ check_ivm_restriction_walker(Node *node, check_ivm_restriction_context *context)
/*
* additional restriction checks for exists subquery
*
* If the query has any EXISTS clauses and columns in them refer to
* columns in tables in the output query, those columns must be
* included in the target list.
* If the query has an EXISTS subquery and columns of a table in
* the outer query are used in the EXISTS subquery, those columns
* must be included in the target list. These columns are required
* to identify tuples in the view to be affected by modification
* of tables in the EXISTS subquery.
*/
if (context->exists_qual_vars != NIL && context->sublevels_up == 0)
{
@ -992,6 +995,7 @@ check_ivm_restriction_walker(Node *node, check_ivm_restriction_context *context)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("column name %s is not supported on incrementally maintainable materialized view", tle->resname)));
if (context->has_agg && !IsA(tle->expr, Aggref) && contain_aggs_of_level((Node *) tle->expr, 0))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@ -1118,6 +1122,7 @@ check_ivm_restriction_walker(Node *node, check_ivm_restriction_context *context)
errmsg("nested sublink is not supported on incrementally maintainable materialized view")));
subselect = (Query *) sublink->subselect;
/* raise ERROR if the sublink has CTE */
if (subselect->cteList)
ereport(ERROR,

5
matview.c
View file

@ -1606,7 +1606,8 @@ rewrite_exists_subquery_walker(Query *query, Node *node, int *count)
if (fromexpr->quals != NULL)
{
query = rewrite_exists_subquery_walker(query, fromexpr->quals, count);
/* drop subquery in WHERE clause */
/* drop WHERE clause when it has only one EXISTS */
if (IsA(fromexpr->quals, SubLink))
fromexpr->quals = NULL;
}
@ -1728,7 +1729,7 @@ rewrite_exists_subquery_walker(Query *query, Node *node, int *count)
* SELECT 1, COUNT(*) AS __ivm_exists_count_0__
* FROM t2
* WHERE t1.key = t2.key
* HAVING __ivm_exists_count_0__ > 0) AS ex
* HAVING COUNT(*) > 0) AS ex
*/
Query *
rewrite_query_for_exists_subquery(Query *query)