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  • Committer: Stewart Smith
  • Date: 2010-11-03 03:30:27 UTC
  • mto: (1902.1.1 build) (1910.1.2 build)
  • mto: This revision was merged to the branch mainline in revision 1903.
  • Revision ID: stewart@flamingspork.com-20101103033027-lskb6gxwwforfz71
fix docs warning: underline/overline too short for replace.rst

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drizzled/sql_delete.cc
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  Multi-table deletes were introduced by Monty and Sinisa
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*/
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#include <config.h>
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#include <drizzled/sql_select.h>
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#include <drizzled/error.h>
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#include <drizzled/probes.h>
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#include <drizzled/sql_parse.h>
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#include <drizzled/sql_base.h>
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#include <drizzled/lock.h>
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#include <drizzled/probes.h>
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#include <drizzled/optimizer/range.h>
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#include <drizzled/records.h>
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#include <drizzled/internal/iocache.h>
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#include <drizzled/transaction_services.h>
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#include <drizzled/filesort.h>
 
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#include "config.h"
 
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#include "drizzled/sql_select.h"
 
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#include "drizzled/error.h"
 
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#include "drizzled/probes.h"
 
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#include "drizzled/sql_parse.h"
 
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#include "drizzled/sql_base.h"
 
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#include "drizzled/lock.h"
 
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#include "drizzled/probes.h"
 
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#include "drizzled/optimizer/range.h"
 
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#include "drizzled/records.h"
 
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#include "drizzled/internal/iocache.h"
 
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#include "drizzled/transaction_services.h"
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namespace drizzled
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{
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  end of dispatch_command().
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*/
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bool delete_query(Session *session, TableList *table_list, COND *conds,
 
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bool mysql_delete(Session *session, TableList *table_list, COND *conds,
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                  SQL_LIST *order, ha_rows limit, uint64_t,
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                  bool reset_auto_increment)
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{
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  bool          const_cond_result;
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  ha_rows       deleted= 0;
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  uint32_t usable_index= MAX_KEY;
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  Select_Lex   *select_lex= &session->getLex()->select_lex;
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  Session::killed_state_t killed_status= Session::NOT_KILLED;
 
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  Select_Lex   *select_lex= &session->lex->select_lex;
 
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  Session::killed_state killed_status= Session::NOT_KILLED;
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  if (session->openTablesLock(table_list))
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  {
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  session->set_proc_info("init");
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  table->map=1;
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  if (prepare_delete(session, table_list, &conds))
 
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  if (mysql_prepare_delete(session, table_list, &conds))
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  {
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    DRIZZLE_DELETE_DONE(1, 0);
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    return true;
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                    fields, all_fields, (Order*) order->first))
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      {
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        delete select;
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        free_underlaid_joins(session, &session->getLex()->select_lex);
 
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        free_underlaid_joins(session, &session->lex->select_lex);
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        DRIZZLE_DELETE_DONE(1, 0);
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        return true;
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  const_cond= (!conds || conds->const_item());
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  select_lex->no_error= session->getLex()->ignore;
 
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  select_lex->no_error= session->lex->ignore;
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  const_cond_result= const_cond && (!conds || conds->val_int());
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  if (session->is_error())
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    delete select;
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    free_underlaid_joins(session, select_lex);
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    session->row_count_func= 0;
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    if (session->is_error())
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      return true;
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    DRIZZLE_DELETE_DONE(0, 0);
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    /**
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     * Resetting the Diagnostic area to prevent
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     * lp bug# 439719
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     */
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    session->main_da.reset_diagnostics_area();
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    session->my_ok((ha_rows) session->rowCount());
 
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    session->my_ok((ha_rows) session->row_count_func);
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    /*
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      We don't need to call reset_auto_increment in this case, because
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      mysql_truncate always gives a NULL conds argument, hence we never
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    if (usable_index == MAX_KEY)
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    {
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      FileSort filesort(*session);
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      table->sort.io_cache= new internal::IO_CACHE;
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      if (not (sortorder= make_unireg_sortorder((Order*) order->first, &length, NULL)) ||
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          (table->sort.found_records = filesort.run(table, sortorder, length,
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                                                    select, HA_POS_ERROR, 1,
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                                                    examined_rows)) == HA_POS_ERROR)
 
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      if (!(sortorder= make_unireg_sortorder((Order*) order->first,
 
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                                             &length, NULL)) ||
 
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          (table->sort.found_records = filesort(session, table, sortorder, length,
 
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                                                select, HA_POS_ERROR, 1,
 
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                                                &examined_rows))
 
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          == HA_POS_ERROR)
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      {
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        delete select;
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        free_underlaid_joins(session, &session->getLex()->select_lex);
 
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        free_underlaid_joins(session, &session->lex->select_lex);
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        DRIZZLE_DELETE_DONE(1, 0);
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        return true;
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  if (usable_index==MAX_KEY)
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  {
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    if ((error= info.init_read_record(session,table,select,1,1)))
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    {
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      table->print_error(error, MYF(0));
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      delete select;
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      free_underlaid_joins(session, select_lex);
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      return true;
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    }
 
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    info.init_read_record(session,table,select,1,1);
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  }
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  else
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  {
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    if ((error= info.init_read_record_idx(session, table, 1, usable_index)))
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    {
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      table->print_error(error, MYF(0));
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      delete select;
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      free_underlaid_joins(session, select_lex);
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      return true;
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    }
 
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    info.init_read_record_idx(session, table, 1, usable_index);
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  }
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  session->set_proc_info("updating");
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  table->mark_columns_needed_for_delete();
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  while (!(error=info.read_record(&info)) && !session->getKilled() &&
 
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  while (!(error=info.read_record(&info)) && !session->killed &&
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         ! session->is_error())
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  {
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    // session->is_error() is tested to disallow delete row on error
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    else
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      table->cursor->unlock_row();  // Row failed selection, release lock on it
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  }
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  killed_status= session->getKilled();
 
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  killed_status= session->killed;
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  if (killed_status != Session::NOT_KILLED || session->is_error())
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    error= 1;                                   // Aborted
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  free_underlaid_joins(session, select_lex);
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  DRIZZLE_DELETE_DONE((error >= 0 || session->is_error()), deleted);
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  if (error < 0 || (session->getLex()->ignore && !session->is_fatal_error))
 
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  if (error < 0 || (session->lex->ignore && !session->is_fatal_error))
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  {
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    session->row_count_func= deleted;
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    /**
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     * lp bug# 439719
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     */
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    session->main_da.reset_diagnostics_area();    
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    session->my_ok((ha_rows) session->rowCount());
 
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    session->my_ok((ha_rows) session->row_count_func);
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  }
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  session->status_var.deleted_row_count+= deleted;
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  Prepare items in DELETE statement
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  SYNOPSIS
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    prepare_delete()
 
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    mysql_prepare_delete()
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    session                     - thread handler
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    table_list          - global/local table list
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    conds               - conditions
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    false OK
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    true  error
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*/
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int prepare_delete(Session *session, TableList *table_list, Item **conds)
 
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int mysql_prepare_delete(Session *session, TableList *table_list, Item **conds)
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{
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  Select_Lex *select_lex= &session->getLex()->select_lex;
 
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  Select_Lex *select_lex= &session->lex->select_lex;
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  List<Item> all_fields;
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  session->getLex()->allow_sum_func= 0;
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  if (setup_tables_and_check_access(session, &session->getLex()->select_lex.context,
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                                    &session->getLex()->select_lex.top_join_list,
 
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  session->lex->allow_sum_func= 0;
 
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  if (setup_tables_and_check_access(session, &session->lex->select_lex.context,
 
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                                    &session->lex->select_lex.top_join_list,
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                                    table_list,
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                                    &select_lex->leaf_tables, false) ||
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      session->setup_conds(table_list, conds))
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  if (select_lex->inner_refs_list.elements &&
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    fix_inner_refs(session, all_fields, select_lex, select_lex->ref_pointer_array))
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    return(true);
 
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    return(-1);
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  return(false);
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}
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  This will work even if the .ISM and .ISD tables are destroyed
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*/
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bool truncate(Session& session, TableList *table_list)
 
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bool mysql_truncate(Session& session, TableList *table_list)
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{
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  bool error;
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  TransactionServices &transaction_services= TransactionServices::singleton();
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  uint64_t save_options= session.options;
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  table_list->lock_type= TL_WRITE;
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  session.options&= ~(OPTION_BEGIN | OPTION_NOT_AUTOCOMMIT);
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  init_select(session.getLex());
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  error= delete_query(&session, table_list, (COND*) 0, (SQL_LIST*) 0,
 
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  mysql_init_select(session.lex);
 
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  error= mysql_delete(&session, table_list, (COND*) 0, (SQL_LIST*) 0,
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                      HA_POS_ERROR, 0L, true);
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  /*
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    Safety, in case the engine ignored ha_enable_transaction(false)
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    above. Also clears session->transaction.*.
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  */
425
 
  error= transaction_services.autocommitOrRollback(session, error);
 
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  error= transaction_services.autocommitOrRollback(&session, error);
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  session.options= save_options;
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  return error;