diff options
Diffstat (limited to 'src/backend/optimizer/path/joinrels.c')
| -rw-r--r-- | src/backend/optimizer/path/joinrels.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/src/backend/optimizer/path/joinrels.c b/src/backend/optimizer/path/joinrels.c index a21c295b99d..5b8d71dc267 100644 --- a/src/backend/optimizer/path/joinrels.c +++ b/src/backend/optimizer/path/joinrels.c @@ -20,7 +20,6 @@ #include "optimizer/pathnode.h" #include "optimizer/paths.h" #include "partitioning/partbounds.h" -#include "utils/lsyscache.h" #include "utils/memutils.h" @@ -46,8 +45,6 @@ static void try_partitionwise_join(PlannerInfo *root, RelOptInfo *rel1, static SpecialJoinInfo *build_child_join_sjinfo(PlannerInfo *root, SpecialJoinInfo *parent_sjinfo, Relids left_relids, Relids right_relids); -static int match_expr_to_partition_keys(Expr *expr, RelOptInfo *rel, - bool strict_op); /* @@ -1573,168 +1570,3 @@ build_child_join_sjinfo(PlannerInfo *root, SpecialJoinInfo *parent_sjinfo, return sjinfo; } - -/* - * Returns true if there exists an equi-join condition for each pair of - * partition keys from given relations being joined. - */ -bool -have_partkey_equi_join(RelOptInfo *joinrel, - RelOptInfo *rel1, RelOptInfo *rel2, - JoinType jointype, List *restrictlist) -{ - PartitionScheme part_scheme = rel1->part_scheme; - ListCell *lc; - int cnt_pks; - bool pk_has_clause[PARTITION_MAX_KEYS]; - bool strict_op; - - /* - * This function should be called when the joining relations have same - * partitioning scheme. - */ - Assert(rel1->part_scheme == rel2->part_scheme); - Assert(part_scheme); - - memset(pk_has_clause, 0, sizeof(pk_has_clause)); - foreach(lc, restrictlist) - { - RestrictInfo *rinfo = lfirst_node(RestrictInfo, lc); - OpExpr *opexpr; - Expr *expr1; - Expr *expr2; - int ipk1; - int ipk2; - - /* If processing an outer join, only use its own join clauses. */ - if (IS_OUTER_JOIN(jointype) && - RINFO_IS_PUSHED_DOWN(rinfo, joinrel->relids)) - continue; - - /* Skip clauses which can not be used for a join. */ - if (!rinfo->can_join) - continue; - - /* Skip clauses which are not equality conditions. */ - if (!rinfo->mergeopfamilies && !OidIsValid(rinfo->hashjoinoperator)) - continue; - - opexpr = castNode(OpExpr, rinfo->clause); - - /* - * The equi-join between partition keys is strict if equi-join between - * at least one partition key is using a strict operator. See - * explanation about outer join reordering identity 3 in - * optimizer/README - */ - strict_op = op_strict(opexpr->opno); - - /* Match the operands to the relation. */ - if (bms_is_subset(rinfo->left_relids, rel1->relids) && - bms_is_subset(rinfo->right_relids, rel2->relids)) - { - expr1 = linitial(opexpr->args); - expr2 = lsecond(opexpr->args); - } - else if (bms_is_subset(rinfo->left_relids, rel2->relids) && - bms_is_subset(rinfo->right_relids, rel1->relids)) - { - expr1 = lsecond(opexpr->args); - expr2 = linitial(opexpr->args); - } - else - continue; - - /* - * Only clauses referencing the partition keys are useful for - * partitionwise join. - */ - ipk1 = match_expr_to_partition_keys(expr1, rel1, strict_op); - if (ipk1 < 0) - continue; - ipk2 = match_expr_to_partition_keys(expr2, rel2, strict_op); - if (ipk2 < 0) - continue; - - /* - * If the clause refers to keys at different ordinal positions, it can - * not be used for partitionwise join. - */ - if (ipk1 != ipk2) - continue; - - /* - * The clause allows partitionwise join if only it uses the same - * operator family as that specified by the partition key. - */ - if (rel1->part_scheme->strategy == PARTITION_STRATEGY_HASH) - { - if (!op_in_opfamily(rinfo->hashjoinoperator, - part_scheme->partopfamily[ipk1])) - continue; - } - else if (!list_member_oid(rinfo->mergeopfamilies, - part_scheme->partopfamily[ipk1])) - continue; - - /* Mark the partition key as having an equi-join clause. */ - pk_has_clause[ipk1] = true; - } - - /* Check whether every partition key has an equi-join condition. */ - for (cnt_pks = 0; cnt_pks < part_scheme->partnatts; cnt_pks++) - { - if (!pk_has_clause[cnt_pks]) - return false; - } - - return true; -} - -/* - * Find the partition key from the given relation matching the given - * expression. If found, return the index of the partition key, else return -1. - */ -static int -match_expr_to_partition_keys(Expr *expr, RelOptInfo *rel, bool strict_op) -{ - int cnt; - - /* This function should be called only for partitioned relations. */ - Assert(rel->part_scheme); - - /* Remove any relabel decorations. */ - while (IsA(expr, RelabelType)) - expr = (Expr *) (castNode(RelabelType, expr))->arg; - - for (cnt = 0; cnt < rel->part_scheme->partnatts; cnt++) - { - ListCell *lc; - - Assert(rel->partexprs); - foreach(lc, rel->partexprs[cnt]) - { - if (equal(lfirst(lc), expr)) - return cnt; - } - - if (!strict_op) - continue; - - /* - * If it's a strict equi-join a NULL partition key on one side will - * not join a NULL partition key on the other side. So, rows with NULL - * partition key from a partition on one side can not join with those - * from a non-matching partition on the other side. So, search the - * nullable partition keys as well. - */ - Assert(rel->nullable_partexprs); - foreach(lc, rel->nullable_partexprs[cnt]) - { - if (equal(lfirst(lc), expr)) - return cnt; - } - } - - return -1; -} |