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Add support for multi-row VALUES clauses as part of INSERT statements

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(e.g. "INSERT ... VALUES (...), (...), ...") and elsewhere as allowed
by the spec. (e.g. similar to a FROM clause subselect). initdb required.
Joe Conway and Tom Lane.
This commit is contained in:
Joe Conway
2006-08-02 01:59:48 +00:00
parent d307c428cb
commit 9caafda579
40 changed files with 1877 additions and 313 deletions
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31
src/backend/optimizer/plan/planner.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.205 2006/07/26 19:31:50 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/plan/planner.c,v 1.206 2006/08/02 01:59:46 joe Exp $
*
*-------------------------------------------------------------------------
*/
@ -48,9 +48,10 @@ ParamListInfo PlannerBoundParamList = NULL; /* current boundParams */
#define EXPRKIND_QUAL 0
#define EXPRKIND_TARGET 1
#define EXPRKIND_RTFUNC 2
#define EXPRKIND_LIMIT 3
#define EXPRKIND_ININFO 4
#define EXPRKIND_APPINFO 5
#define EXPRKIND_VALUES 3
#define EXPRKIND_LIMIT 4
#define EXPRKIND_ININFO 5
#define EXPRKIND_APPINFO 6
static Node *preprocess_expression(PlannerInfo *root, Node *expr, int kind);
@ -295,7 +296,7 @@ subquery_planner(Query *parse, double tuple_fraction,
preprocess_expression(root, (Node *) root->append_rel_list,
EXPRKIND_APPINFO);
/* Also need to preprocess expressions for function RTEs */
/* Also need to preprocess expressions for function and values RTEs */
foreach(l, parse->rtable)
{
RangeTblEntry *rte = (RangeTblEntry *) lfirst(l);
@ -303,6 +304,10 @@ subquery_planner(Query *parse, double tuple_fraction,
if (rte->rtekind == RTE_FUNCTION)
rte->funcexpr = preprocess_expression(root, rte->funcexpr,
EXPRKIND_RTFUNC);
else if (rte->rtekind == RTE_VALUES)
rte->values_lists = (List *)
preprocess_expression(root, (Node *) rte->values_lists,
EXPRKIND_VALUES);
}
/*
@ -418,8 +423,10 @@ preprocess_expression(PlannerInfo *root, Node *expr, int kind)
* If the query has any join RTEs, replace join alias variables with
* base-relation variables. We must do this before sublink processing,
* else sublinks expanded out from join aliases wouldn't get processed.
* We can skip it in VALUES lists, however, since they can't contain
* any Vars at all.
*/
if (root->hasJoinRTEs)
if (root->hasJoinRTEs && kind != EXPRKIND_VALUES)
expr = flatten_join_alias_vars(root, expr);
/*
@ -437,10 +444,14 @@ preprocess_expression(PlannerInfo *root, Node *expr, int kind)
* and we will waste cycles copying the tree. Notice however that we
* still must do it for quals (to get AND/OR flatness); and if we are in a
* subquery we should not assume it will be done only once.
*
* For VALUES lists we never do this at all, again on the grounds that
* we should optimize for one-time evaluation.
*/
if (root->parse->jointree->fromlist != NIL ||
kind == EXPRKIND_QUAL ||
PlannerQueryLevel > 1)
if (kind != EXPRKIND_VALUES &&
(root->parse->jointree->fromlist != NIL ||
kind == EXPRKIND_QUAL ||
PlannerQueryLevel > 1))
expr = eval_const_expressions(expr);
/*
@ -465,7 +476,7 @@ preprocess_expression(PlannerInfo *root, Node *expr, int kind)
* SS_replace_correlation_vars ...
*/
/* Replace uplevel vars with Param nodes */
/* Replace uplevel vars with Param nodes (this IS possible in VALUES) */
if (PlannerQueryLevel > 1)
expr = SS_replace_correlation_vars(expr);