diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 45a3bf72fa4..4c15c755aa7 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -944,6 +944,8 @@ public: With_clause *with_clause; /* With element where this unit is used as the specification (if any) */ With_element *with_element; + /* The unit used as a CTE specification from which this unit is cloned */ + st_select_lex_unit *cloned_from; /* thread handler */ THD *thd; /* @@ -1543,7 +1545,9 @@ public: } With_element *get_with_element() { - return master_unit()->with_element; + return master_unit()->cloned_from ? + master_unit()->cloned_from->with_element : + master_unit()->with_element; } With_element *find_table_def_in_with_clauses(TABLE_LIST *table); bool check_unrestricted_recursive(bool only_standard_compliant); @@ -3389,6 +3393,20 @@ public: */ uint8 derived_tables; uint8 context_analysis_only; + /* + true <=> The parsed fragment requires resolution of references to CTE + at the end of parsing. This name resolution process involves searching + for possible dependencies between CTE defined in the parsed fragment and + detecting possible recursive references. + The flag is set to true if the fragment contains CTE definitions. + */ + bool with_cte_resolution; + /* + true <=> only resolution of references to CTE are required in the parsed + fragment, no checking of dependencies between CTE is required. + This flag is used only when parsing clones of CTE specifications. + */ + bool only_cte_resolution; bool local_file; bool check_exists; bool autocommit; @@ -4725,6 +4743,12 @@ public: const LEX_CSTRING *constraint_name, Table_ident *ref_table_name, DDL_options ddl_options); + bool check_dependencies_in_with_clauses(); + bool resolve_references_to_cte_in_hanging_cte(); + bool check_cte_dependencies_and_resolve_references(); + bool resolve_references_to_cte(TABLE_LIST *tables, + TABLE_LIST **tables_last); + }; |