diff options
Diffstat (limited to 'sql/item.h')
| -rw-r--r-- | sql/item.h | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/sql/item.h b/sql/item.h index 313cec8173d..ac8f79116eb 100644 --- a/sql/item.h +++ b/sql/item.h @@ -69,6 +69,30 @@ struct SARGABLE_PARAM; class RANGE_OPT_PARAM; class SEL_TREE; +enum precedence { + LOWEST_PRECEDENCE, + ASSIGN_PRECEDENCE, // := + OR_PRECEDENCE, // OR, || (unless PIPES_AS_CONCAT) + XOR_PRECEDENCE, // XOR + AND_PRECEDENCE, // AND, && + NOT_PRECEDENCE, // NOT (unless HIGH_NOT_PRECEDENCE) + BETWEEN_PRECEDENCE, // BETWEEN, CASE, WHEN, THEN, ELSE + CMP_PRECEDENCE, // =, <=>, >=, >, <=, <, <>, !=, IS, LIKE, REGEXP, IN + BITOR_PRECEDENCE, // | + BITAND_PRECEDENCE, // & + SHIFT_PRECEDENCE, // <<, >> + ADDINTERVAL_PRECEDENCE, // first argument in +INTERVAL + ADD_PRECEDENCE, // +, - + MUL_PRECEDENCE, // *, /, DIV, %, MOD + BITXOR_PRECEDENCE, // ^ + PIPES_PRECEDENCE, // || (if PIPES_AS_CONCAT) + NEG_PRECEDENCE, // unary -, ~ + BANG_PRECEDENCE, // !, NOT (if HIGH_NOT_PRECEDENCE) + COLLATE_PRECEDENCE, // BINARY, COLLATE + INTERVAL_PRECEDENCE, // INTERVAL + DEFAULT_PRECEDENCE, + HIGHEST_PRECEDENCE +}; typedef Bounds_checked_array<Item*> Ref_ptr_array; @@ -1263,13 +1287,13 @@ public: query and why they should be generated from the Item-tree, @see mysql_register_view(). */ - virtual inline void print(String *str, enum_query_type query_type) - { - str->append(full_name()); - } + virtual enum precedence precedence() const { return DEFAULT_PRECEDENCE; } + void print_parenthesised(String *str, enum_query_type query_type, + enum precedence parent_prec); + virtual void print(String *str, enum_query_type query_type); + void print_item_w_name(String *str, enum_query_type query_type); + void print_value(String *str); - void print_item_w_name(String *, enum_query_type query_type); - void print_value(String *); virtual void update_used_tables() {} virtual COND *build_equal_items(THD *thd, COND_EQUAL *inheited, bool link_item_fields, |