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  • Committer: Lee Bieber
  • Date: 2010-11-07 19:34:48 UTC
  • mfrom: (1910.1.2 build)
  • Revision ID: kalebral@gmail.com-20101107193448-64kdu912qej354sh
Merge Stewart - including adapting and expanding the "differences from mysql" page from the wiki.
Merge Stewart - fix bug 668143: drizzleslap with --commit runs second iteration data load in a transaction

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drizzled/sql_derived.cc
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  Call given derived table processor (preparing or filling tables)
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  SYNOPSIS
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    handle_derived()
 
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    mysql_handle_derived()
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    lex                 LEX for this thread
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    processor           procedure of derived table processing
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    false  OK
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    true   Error
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*/
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bool handle_derived(LEX *lex, bool (*processor)(Session*, LEX*, TableList*))
 
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bool mysql_handle_derived(LEX *lex, bool (*processor)(Session*, LEX*, TableList*))
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{
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  bool res= false;
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  if (lex->derived_tables)
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  Create temporary table structure (but do not fill it)
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  SYNOPSIS
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    derived_prepare()
 
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    mysql_derived_prepare()
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    session                     Thread handle
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    lex                 LEX for this thread
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    orig_table_list     TableList for the upper SELECT
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    false  OK
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    true   Error
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*/
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bool derived_prepare(Session *session, LEX *, TableList *orig_table_list)
 
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bool mysql_derived_prepare(Session *session, LEX *, TableList *orig_table_list)
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{
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  Select_Lex_Unit *unit= orig_table_list->derived;
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  uint64_t create_options;
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      /* Force read of table stats in the optimizer */
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      table->cursor->info(HA_STATUS_VARIABLE);
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      /* Add new temporary table to list of open derived tables */
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      table->setNext(session->getDerivedTables());
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      session->setDerivedTables(table);
 
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      table->setNext(session->derived_tables);
 
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      session->derived_tables= table;
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    }
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  }
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  fill derived table
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  SYNOPSIS
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    derived_filling()
 
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    mysql_derived_filling()
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    session                     Thread handle
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    lex                 LEX for this thread
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    unit                node that contains all SELECT's for derived tables
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    false  OK
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    true   Error
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*/
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bool derived_filling(Session *session, LEX *lex, TableList *orig_table_list)
 
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bool mysql_derived_filling(Session *session, LEX *lex, TableList *orig_table_list)
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{
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  Table *table= orig_table_list->table;
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  Select_Lex_Unit *unit= orig_table_list->derived;
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              first_select->options&= ~OPTION_FOUND_ROWS;
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      lex->current_select= first_select;
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      res= select_query(session, &first_select->ref_pointer_array,
 
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      res= mysql_select(session, &first_select->ref_pointer_array,
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                        (TableList*) first_select->table_list.first,
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                        first_select->with_wild,
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                        first_select->item_list, first_select->where,