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drizzled/sql_update.cc
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/*
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  Single table and multi table updates of tables.
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  Multi-table updates were introduced by Sinisa & Monty
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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_base.h"
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#include "drizzled/field/timestamp.h"
 
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#include "drizzled/field/epoch.h"
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#include "drizzled/sql_parse.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 "drizzled/plugin/storage_engine.h"
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#include <boost/dynamic_bitset.hpp>
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#include <list>
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  Process usual UPDATE
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  SYNOPSIS
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    mysql_update()
 
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    update_query()
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    session                     thread handler
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    fields              fields for update
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    values              values of fields for update
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    1  - error
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*/
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int mysql_update(Session *session, TableList *table_list,
 
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int update_query(Session *session, TableList *table_list,
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                 List<Item> &fields, List<Item> &values, COND *conds,
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                 uint32_t order_num, Order *order,
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                 ha_rows limit, enum enum_duplicates,
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  bool          using_limit= limit != HA_POS_ERROR;
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  bool          used_key_is_modified;
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  bool          transactional_table;
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  int           error;
 
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  int           error= 0;
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  uint          used_index= MAX_KEY, dup_key_found;
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  bool          need_sort= true;
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  ha_rows       updated, found;
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  table->covering_keys= table->getShare()->keys_in_use;
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  table->quick_keys.reset();
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  if (mysql_prepare_update(session, table_list, &conds, order_num, order))
 
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  if (prepare_update(session, table_list, &conds, order_num, order))
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  {
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    DRIZZLE_UPDATE_DONE(1, 0, 0);
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    return 1;
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    fix_inner_refs(session, all_fields, select_lex, select_lex->ref_pointer_array))
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  {
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    DRIZZLE_UPDATE_DONE(1, 0, 0);
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    return -1;
 
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    return 1;
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  }
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  if (conds)
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     */
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    session->main_da.reset_diagnostics_area();
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    free_underlaid_joins(session, select_lex);
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    if (error)
 
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    if (error || session->is_error())
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    {
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      DRIZZLE_UPDATE_DONE(1, 0, 0);
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      return 1;
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      if (used_index == MAX_KEY || (select && select->quick))
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      {
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        info.init_read_record(session, table, select, 0, true);
 
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        if ((error= info.init_read_record(session, table, select, 0, true)))
 
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          goto err;
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      }
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      else
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      {
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        info.init_read_record_idx(session, table, 1, used_index);
 
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        if ((error= info.init_read_record_idx(session, table, 1, used_index)))
 
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          goto err;
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      }
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      session->set_proc_info("Searching rows for update");
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      }
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      else
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      {
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        select= new optimizer::SqlSelect;
 
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        select= new optimizer::SqlSelect();
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        select->head=table;
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      }
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      if (tempfile.reinit_io_cache(internal::READ_CACHE,0L,0,0))
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  if (select && select->quick && select->quick->reset())
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    goto err;
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  table->cursor->try_semi_consistent_read(1);
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  info.init_read_record(session, table, select, 0, true);
 
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  if ((error= info.init_read_record(session, table, select, 0, true)))
 
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  {
 
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    goto err;
 
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  }
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  updated= found= 0;
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  /*
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  session->set_proc_info("Updating");
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  transactional_table= table->cursor->has_transactions();
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  session->abort_on_warning= test(!ignore);
 
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  session->setAbortOnWarning(test(!ignore));
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  /*
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    Assure that we can use position()
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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((ulong) session->row_count_func, found, id, buff);
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    session->status_var.updated_row_count+= session->row_count_func;
 
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    session->my_ok((ulong) session->rowCount(), found, id, buff);
 
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    session->status_var.updated_row_count+= session->rowCount();
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  }
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  session->count_cuted_fields= CHECK_FIELD_ERROR_FOR_NULL;              /* calc cuted fields */
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  session->abort_on_warning= 0;
 
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  session->setAbortOnWarning(false);
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  DRIZZLE_UPDATE_DONE((error >= 0 || session->is_error()), found, updated);
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  return ((error >= 0 || session->is_error()) ? 1 : 0);
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err:
 
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  if (error != 0)
 
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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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  if (table->key_read)
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    table->key_read=0;
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    table->cursor->extra(HA_EXTRA_NO_KEYREAD);
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  }
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  session->abort_on_warning= 0;
 
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  session->setAbortOnWarning(false);
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  DRIZZLE_UPDATE_DONE(1, 0, 0);
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  return 1;
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  Prepare items in UPDATE statement
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  SYNOPSIS
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    mysql_prepare_update()
 
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    prepare_update()
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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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bool mysql_prepare_update(Session *session, TableList *table_list,
 
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bool prepare_update(Session *session, TableList *table_list,
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                         Item **conds, uint32_t order_num, Order *order)
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{
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  List<Item> all_fields;