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Viewing changes to drizzled/function/set_user_var.cc

  • Committer: Brian Aker
  • Date: 2009-05-05 00:40:45 UTC
  • mfrom: (1003.2.7 mordred)
  • Revision ID: brian@gaz-20090505004045-yns4biv63thufj1b
Tags: 2009.05.1005
Merge Monty

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drizzled/function/set_user_var.cc
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#include <drizzled/server_includes.h>
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#include CSTDINT_H
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#include <drizzled/function/set_user_var.h>
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#include <drizzled/function/get_variable.h>
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#include <drizzled/function/update_hash.h>
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#include <drizzled/field/num.h>
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#include <drizzled/virtual_column_info.h>
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#include <drizzled/session.h>
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#include <bitset>
 
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using namespace std;
 
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/*
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  When a user variable is updated (in a SET command or a query like
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  SELECT @a:= ).
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  assert(fixed == 0);
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  /* fix_fields will call Item_func_set_user_var::fix_length_and_dec */
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  if (Item_func::fix_fields(session, ref) ||
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      !(entry= get_variable(&session->user_vars, name, 1)))
 
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      !(entry= session->getVariable(name, true)))
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    return true;
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  /*
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     Remember the last query which updated it, this way a query can later know
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  {
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    Table *table= (Table *) arg;
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    if (result_field->table == table || !table)
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      bitmap_set_bit(result_field->table->read_set, result_field->field_index);
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    if (result_field->vcol_info && result_field->vcol_info->expr_item)
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      return result_field->vcol_info->
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               expr_item->walk(&Item::register_field_in_read_map, 1, arg);
 
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      result_field->table->read_set->set(result_field->field_index);
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  }
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  return 0;
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}
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bool Item_func_set_user_var::register_field_in_bitmap(unsigned char *arg)
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{
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  MY_BITMAP *bitmap = (MY_BITMAP *) arg;
 
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  bitset<MAX_FIELDS> *bitmap = (bitset<MAX_FIELDS> *) arg;
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  assert(bitmap);
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  if (result_field)
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  {
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    bitmap_set_bit(bitmap, result_field->field_index);
 
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    bitmap->set(result_field->field_index);
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  }
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  return 0;
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}