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add limit to solve slow compute_fd_item

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This commit is contained in:
akaError
2023-09-20 15:01:11 +00:00
committed by ob-robot
parent 9e7c29c68b
commit 8b4f1665de
7 changed files with 56 additions and 34 deletions
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14
src/sql/optimizer/ob_log_set.cpp
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@ -208,18 +208,20 @@ int ObLogSet::compute_fd_item_set()
LOG_WARN("failed to create fd item set", K(ret));
} else if (OB_FAIL(get_set_exprs(select_exprs))) {
LOG_WARN("failed to get set exprs", K(ret));
} else if (!ObTransformUtils::need_compute_fd_item_set(select_exprs)) {
//do nothing
} else if (OB_FAIL(my_plan_->get_fd_item_factory().create_expr_fd_item(
fd_item,
true,
select_exprs,
select_exprs))) {
fd_item,
true,
select_exprs,
select_exprs))) {
} else if (OB_FAIL(fd_item_set->push_back(fd_item))) {
LOG_WARN("failed to push back fd item", K(ret));
} else if ((ObSelectStmt::INTERSECT == set_op_ || ObSelectStmt::EXCEPT == set_op_) &&
OB_FAIL(append(*fd_item_set, left_child->get_fd_item_set()))) {
OB_FAIL(append(*fd_item_set, left_child->get_fd_item_set()))) {
LOG_WARN("failed to append fd item set", K(ret));
} else if (ObSelectStmt::INTERSECT == set_op_ &&
OB_FAIL(append(*fd_item_set, right_child->get_fd_item_set()))) {
OB_FAIL(append(*fd_item_set, right_child->get_fd_item_set()))) {
LOG_WARN("failed to append fd item set", K(ret));
} else if (OB_FAIL(deduce_const_exprs_and_ft_item_set(*fd_item_set))) {
LOG_WARN("falied to deduce fd item set", K(ret));