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Disable some rewrite rules for dblink

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This commit is contained in:
xianyu-w
2023-08-04 10:42:30 +00:00
committed by ob-robot
parent 88430a9d96
commit b622142260
1 changed files with 18 additions and 7 deletions
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25
src/sql/rewrite/ob_transformer_impl.cpp
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@ -432,18 +432,29 @@ int ObTransformerImpl::choose_rewrite_rules(ObDMLStmt *stmt, uint64_t &need_type
ObTransformRule::add_trans_type(disable_list, WIN_MAGIC);
}
if (func.contain_link_table_) {
disable_list |= (~ObTransformRule::ALL_HEURISTICS_RULES);
// Below rules might generate filter which contains constant values which has implicit types,
// some rules might generate filter which contains constant values which has implicit types,
// which can not be printed in the link sql.
// example：
// create table t (c1 varchar(10), c2 char(10))
// select * from t where c1 = 'a' and c2 = c1;
// => select * from t where c1 = 'a' and c2 = implicit cast('a' as varchar);
ObTransformRule::add_trans_type(disable_list, PREDICATE_MOVE_AROUND);
ObTransformRule::add_trans_type(disable_list, CONST_PROPAGATE);
ObTransformRule::add_trans_type(disable_list, SIMPLIFY_EXPR);
ObTransformRule::add_trans_type(disable_list, SELECT_EXPR_PULLUP);
uint64_t dblink_enable_list = 0;
ObTransformRule::add_trans_type(dblink_enable_list, SIMPLIFY_DISTINCT);
ObTransformRule::add_trans_type(dblink_enable_list, SIMPLIFY_ORDERBY);
ObTransformRule::add_trans_type(dblink_enable_list, SIMPLIFY_LIMIT);
ObTransformRule::add_trans_type(dblink_enable_list, PROJECTION_PRUNING);
ObTransformRule::add_trans_type(dblink_enable_list, VIEW_MERGE);
ObTransformRule::add_trans_type(dblink_enable_list, COUNT_TO_EXISTS);
ObTransformRule::add_trans_type(dblink_enable_list, WHERE_SQ_PULL_UP);
ObTransformRule::add_trans_type(dblink_enable_list, SIMPLIFY_SUBQUERY);
ObTransformRule::add_trans_type(dblink_enable_list, QUERY_PUSH_DOWN);
ObTransformRule::add_trans_type(dblink_enable_list, ELIMINATE_OJ);
ObTransformRule::add_trans_type(dblink_enable_list, JOIN_ELIMINATION);
ObTransformRule::add_trans_type(dblink_enable_list, JOIN_LIMIT_PUSHDOWN);
ObTransformRule::add_trans_type(dblink_enable_list, LEFT_JOIN_TO_ANTI);
ObTransformRule::add_trans_type(dblink_enable_list, AGGR_SUBQUERY);
ObTransformRule::add_trans_type(dblink_enable_list, FASTMINMAX);
disable_list |= (~dblink_enable_list);
}
//dblink trace point
if ((OB_E(EventTable::EN_GENERATE_PLAN_WITH_RECONSTRUCT_SQL) OB_SUCCESS) != OB_SUCCESS) {