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[CP] fix join eliminate bug

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This commit is contained in:
obdev
2022-08-08 20:34:07 +08:00
committed by wangzelin.wzl
parent 577e69c13f
commit af7a161cd8
6 changed files with 149 additions and 29 deletions
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17
src/sql/rewrite/ob_transform_utils.cpp
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@ -4726,17 +4726,18 @@ bool ObTransformUtils::is_subarray(const ObRelIds& table_ids, const common::ObIA
return bool_ret;
}
int ObTransformUtils::check_loseless_join(ObDMLStmt* stmt, ObTransformerCtx* ctx, TableItem* source_table,
TableItem* target_table, ObSQLSessionInfo* session_info, ObSchemaChecker* schema_checker,
ObStmtMapInfo& stmt_map_info, bool& is_loseless,
EqualSets* input_equal_sets) // default value NULL
int ObTransformUtils::check_loseless_join(ObDMLStmt *stmt, ObTransformerCtx *ctx, TableItem *source_table,
TableItem *target_table, ObSQLSessionInfo *session_info, ObSchemaChecker *schema_checker,
ObStmtMapInfo &stmt_map_info, bool is_on_null_side, bool &is_loseless,
EqualSets *input_equal_sets /*= NULL*/)
{
int ret = OB_SUCCESS;
bool is_contain = false;
bool source_unique = false;
bool target_unique = false;
ObSEArray<ObRawExpr*, 16> source_exprs;
ObSEArray<ObRawExpr*, 16> target_exprs;
ObSEArray<ObRawExpr *, 16> source_exprs;
ObSEArray<ObRawExpr *, 16> target_exprs;
ObSEArray<ObRawExpr *, 8> target_tab_cols;
is_loseless = false;
if (OB_ISNULL(stmt) || OB_ISNULL(source_table) || OB_ISNULL(target_table) || OB_ISNULL(schema_checker)) {
ret = OB_ERR_UNEXPECTED;
@ -4754,6 +4755,10 @@ int ObTransformUtils::check_loseless_join(ObDMLStmt* stmt, ObTransformerCtx* ctx
target_exprs,
input_equal_sets))) {
LOG_WARN("failed to extract lossless join columns", K(ret));
} else if (OB_FAIL(stmt->get_column_exprs(target_table->table_id_, target_tab_cols))) {
LOG_WARN("failed to get column exprs", K(ret));
} else if (is_on_null_side && !target_tab_cols.empty() && target_exprs.empty()) {
is_loseless = false;
} else if (OB_FAIL(ObTransformUtils::check_exprs_unique(
*stmt, source_table, source_exprs, session_info, schema_checker, source_unique))) {
LOG_WARN("failed to check exprs unique", K(ret));