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  • Committer: Bazaar Package Importer
  • Author(s): Monty Taylor
  • Date: 2010-03-18 12:12:31 UTC
  • Revision ID: james.westby@ubuntu.com-20100318121231-k6g1xe6cshbwa0f8
Tags: upstream-2010.03.1347
Import upstream version 2010.03.1347

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drizzled/sql_base.h
 
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 
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 *
 
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 *  Copyright (C) 2008 Sun Microsystems
 
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 *
 
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 *  This program is free software; you can redistribute it and/or modify
 
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 *  it under the terms of the GNU General Public License as published by
 
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 *  the Free Software Foundation; version 2 of the License.
 
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 *
 
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 *  This program is distributed in the hope that it will be useful,
 
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 *  GNU General Public License for more details.
 
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 *
 
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 *  You should have received a copy of the GNU General Public License
 
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 *  along with this program; if not, write to the Free Software
 
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
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 */
 
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#ifndef DRIZZLED_SQL_BASE_H
 
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#define DRIZZLED_SQL_BASE_H
 
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#include <drizzled/table.h>
 
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namespace drizzled
 
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{
 
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class TableShare;
 
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class Name_resolution_context;
 
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void table_cache_free(void);
 
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bool table_cache_init(void);
 
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uint32_t cached_open_tables(void);
 
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uint32_t cached_table_definitions(void);
 
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HASH *get_open_cache();
 
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void kill_drizzle(void);
 
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/* sql_base.cc */
 
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void set_item_name(Item *item,char *pos,uint32_t length);
 
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bool add_field_to_list(Session *session, LEX_STRING *field_name, enum enum_field_types type,
 
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                       char *length, char *decimal,
 
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                       uint32_t type_modifier,
 
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                       enum column_format_type column_format,
 
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                       Item *default_value, Item *on_update_value,
 
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                       LEX_STRING *comment,
 
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                       char *change, List<String> *interval_list,
 
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                       const CHARSET_INFO * const cs);
 
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CreateField * new_create_field(Session *session, char *field_name, enum_field_types type,
 
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                               char *length, char *decimals,
 
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                               uint32_t type_modifier,
 
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                               Item *default_value, Item *on_update_value,
 
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                               LEX_STRING *comment, char *change,
 
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                               List<String> *interval_list, CHARSET_INFO *cs);
 
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void store_position_for_column(const char *name);
 
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bool push_new_name_resolution_context(Session *session,
 
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                                      TableList *left_op,
 
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                                      TableList *right_op);
 
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void add_join_on(TableList *b,Item *expr);
 
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void add_join_natural(TableList *a,TableList *b,List<String> *using_fields,
 
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                      Select_Lex *lex);
 
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extern Item **not_found_item;
 
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/**
 
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  A set of constants used for checking non aggregated fields and sum
 
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  functions mixture in the ONLY_FULL_GROUP_BY_MODE.
 
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*/
 
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enum enum_group_by_mode_type
 
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{
 
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  NON_AGG_FIELD_USED= 0,
 
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  SUM_FUNC_USED
 
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};
 
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/**
 
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  This enumeration type is used only by the function find_item_in_list
 
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  to return the info on how an item has been resolved against a list
 
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  of possibly aliased items.
 
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  The item can be resolved:
 
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   - against an alias name of the list's element (RESOLVED_AGAINST_ALIAS)
 
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   - against non-aliased field name of the list  (RESOLVED_WITH_NO_ALIAS)
 
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   - against an aliased field name of the list   (RESOLVED_BEHIND_ALIAS)
 
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   - ignoring the alias name in cases when SQL requires to ignore aliases
 
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     (e.g. when the resolved field reference contains a table name or
 
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     when the resolved item is an expression)   (RESOLVED_IGNORING_ALIAS)
 
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*/
 
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enum enum_resolution_type {
 
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  NOT_RESOLVED=0,
 
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  RESOLVED_IGNORING_ALIAS,
 
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  RESOLVED_BEHIND_ALIAS,
 
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  RESOLVED_WITH_NO_ALIAS,
 
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  RESOLVED_AGAINST_ALIAS
 
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};
 
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Item ** find_item_in_list(Item *item, List<Item> &items, uint32_t *counter,
 
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                          find_item_error_report_type report_error,
 
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                          enum_resolution_type *resolution);
 
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bool insert_fields(Session *session, Name_resolution_context *context,
 
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                   const char *db_name, const char *table_name,
 
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                   List_iterator<Item> *it, bool any_privileges);
 
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bool setup_tables(Session *session, Name_resolution_context *context,
 
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                  List<TableList> *from_clause, TableList *tables,
 
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                  TableList **leaves, bool select_insert);
 
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bool setup_tables_and_check_access(Session *session,
 
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                                   Name_resolution_context *context,
 
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                                   List<TableList> *from_clause,
 
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                                   TableList *tables,
 
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                                   TableList **leaves,
 
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                                   bool select_insert);
 
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int setup_wild(Session *session, List<Item> &fields,
 
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               List<Item> *sum_func_list,
 
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               uint32_t wild_num);
 
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bool setup_fields(Session *session, Item** ref_pointer_array,
 
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                  List<Item> &item, enum_mark_columns mark_used_columns,
 
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                  List<Item> *sum_func_list, bool allow_sum_func);
 
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inline bool setup_fields_with_no_wrap(Session *session, Item **ref_pointer_array,
 
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                                      List<Item> &item,
 
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                                      enum_mark_columns mark_used_columns,
 
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                                      List<Item> *sum_func_list,
 
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                                      bool allow_sum_func)
 
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{
 
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  bool res;
 
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  res= setup_fields(session, ref_pointer_array, item, mark_used_columns, sum_func_list,
 
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                    allow_sum_func);
 
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  return res;
 
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}
 
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int setup_conds(Session *session, TableList *leaves, COND **conds);
 
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/* open_and_lock_tables with optional derived handling */
 
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TableList *find_table_in_list(TableList *table,
 
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                               TableList *TableList::*link,
 
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                               const char *db_name,
 
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                               const char *table_name);
 
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TableList *unique_table(TableList *table, TableList *table_list,
 
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                        bool check_alias= false);
 
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void remove_db_from_cache(const std::string schema_name);
 
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/* bits for last argument to remove_table_from_cache() */
 
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#define RTFC_NO_FLAG                0x0000
 
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#define RTFC_OWNED_BY_Session_FLAG      0x0001
 
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#define RTFC_WAIT_OTHER_THREAD_FLAG 0x0002
 
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#define RTFC_CHECK_KILLED_FLAG      0x0004
 
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bool remove_table_from_cache(Session *session, const char *db, const char *table,
 
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                             uint32_t flags);
 
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void mem_alloc_error(size_t size);
 
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bool fill_record(Session* session, List<Item> &fields, List<Item> &values, bool ignore_errors= false);
 
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bool fill_record(Session *session, Field **field, List<Item> &values, bool ignore_errors= false);
 
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inline TableList *find_table_in_global_list(TableList *table,
 
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                                             const char *db_name,
 
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                                             const char *table_name)
 
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{
 
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  return find_table_in_list(table, &TableList::next_global,
 
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                            db_name, table_name);
 
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}
 
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} /* namespace drizzled */
 
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#endif /* DRIZZLED_SQL_BASE_H */