diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 44 |
1 files changed, 31 insertions, 13 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 64e2edba0a6..acdbab62076 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -1,4 +1,5 @@ -/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc. +/* + Copyright (c) 2000, 2011, Oracle and/or its affiliates. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -11,7 +12,8 @@ You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ /** @defgroup Semantic_Analysis Semantic Analysis @@ -720,16 +722,7 @@ public: joins on the right. */ List<String> *prev_join_using; - /* - Bitmap used in the ONLY_FULL_GROUP_BY_MODE to prevent mixture of aggregate - functions and non aggregated fields when GROUP BY list is absent. - Bits: - 0 - non aggregated fields are used in this select, - defined as NON_AGG_FIELD_USED. - 1 - aggregate functions are used in this select, - defined as SUM_FUNC_USED. - */ - uint8 full_group_by_flag; + void init_query(); void init_select(); st_select_lex_unit* master_unit(); @@ -838,7 +831,22 @@ public: void clear_index_hints(void) { index_hints= NULL; } -private: + /* + For MODE_ONLY_FULL_GROUP_BY we need to maintain two flags: + - Non-aggregated fields are used in this select. + - Aggregate functions are used in this select. + In MODE_ONLY_FULL_GROUP_BY only one of these may be true. + */ + bool non_agg_field_used() const { return m_non_agg_field_used; } + bool agg_func_used() const { return m_agg_func_used; } + + void set_non_agg_field_used(bool val) { m_non_agg_field_used= val; } + void set_agg_func_used(bool val) { m_agg_func_used= val; } + +private: + bool m_non_agg_field_used; + bool m_agg_func_used; + /* current index hint kind. used in filling up index_hints */ enum index_hint_type current_index_hint_type; index_clause_map current_index_hint_clause; @@ -1852,6 +1860,16 @@ typedef struct st_lex : public Query_tables_list uint create_select_pos; bool create_select_in_comment; + /* + The set of those tables whose fields are referenced in all subqueries + of the query. + TODO: possibly this it is incorrect to have used tables in LEX because + with subquery, it is not clear what does the field mean. To fix this + we should aggregate used tables information for selected expressions + into the select_lex. + */ + table_map used_tables; + st_lex(); virtual ~st_lex() |