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  • Committer: Monty Taylor
  • Date: 2010-12-24 07:15:43 UTC
  • mto: This revision was merged to the branch mainline in revision 2029.
  • Revision ID: mordred@inaugust.com-20101224071543-ab082y5circku6v5
Renamed things prefixed mysql_ or mysqld_

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drizzled/sql_select.cc
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  @file
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  @brief
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  mysql_select and join optimization
 
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  select_query and join optimization
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  @defgroup Query_Optimizer  Query Optimizer
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  @{
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    unit->set_limit(unit->global_parameters);
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    session->session_marker= 0;
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    /*
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      'options' of mysql_select will be set in JOIN, as far as JOIN for
 
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      'options' of select_query will be set in JOIN, as far as JOIN for
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      every PS/SP execution new, we will not need reset this flag if
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      setup_tables_done_option changed for next rexecution
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    */
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    res= mysql_select(session,
 
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    res= select_query(session,
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                      &select_lex->ref_pointer_array,
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                      (TableList*) select_lex->table_list.first,
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                      select_lex->with_wild,
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/*****************************************************************************
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  Check fields, find best join, do the select and output fields.
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  mysql_select assumes that all tables are already opened
 
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  select_query assumes that all tables are already opened
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*****************************************************************************/
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/*
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  @retval
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    true   an error
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*/
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bool mysql_select(Session *session,
 
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bool select_query(Session *session,
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                  Item ***rref_pointer_array,
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                  TableList *tables, 
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                  uint32_t wild_num, 
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  /*
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    we should restore old value of count_cuted_fields because
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    store_val_in_field can be called from mysql_insert
 
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    store_val_in_field can be called from insert_query
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    with select_insert, which make count_cuted_fields= 1
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   */
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  enum_check_fields old_count_cuted_fields= session->count_cuted_fields;