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642.1.10
by Lee
move functions from item.cc/item.h to item directory |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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1999.6.1
by kalebral at gmail
update Copyright strings to a more common format to help with creating the master debian copyright file |
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* Copyright (C) 2008 Sun Microsystems, Inc.
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642.1.10
by Lee
move functions from item.cc/item.h to item directory |
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef DRIZZLED_ITEM_REF_NULL_HELPER_H
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#define DRIZZLED_ITEM_REF_NULL_HELPER_H
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/*
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An object of this class:
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- Converts val_XXX() calls to ref->val_XXX_result() calls, like Item_ref.
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- Sets owner->was_null=true if it has returned a NULL value from any
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val_XXX() function. This allows to inject an Item_ref_null_helper
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object into subquery and then check if the subquery has produced a row
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with NULL value.
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*/
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1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
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namespace drizzled |
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{
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642.1.10
by Lee
move functions from item.cc/item.h to item directory |
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class Item_ref_null_helper: public Item_ref |
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{
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protected: |
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Item_in_subselect* owner; |
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public: |
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Item_ref_null_helper(Name_resolution_context *context_arg, |
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Item_in_subselect* master, Item **item, |
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const char *table_name_arg, const char *field_name_arg) |
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:Item_ref(context_arg, item, table_name_arg, field_name_arg), |
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owner(master) {} |
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double val_real(); |
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int64_t val_int(); |
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String* val_str(String* s); |
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2030.1.4
by Brian Aker
Change my_decimal to Decimal |
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type::Decimal *val_decimal(type::Decimal *); |
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642.1.10
by Lee
move functions from item.cc/item.h to item directory |
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bool val_bool(); |
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2030.1.5
by Brian Aker
Update for moving DRIZZLE_TIME to type::Time |
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bool get_date(type::Time *ltime, uint32_t fuzzydate); |
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642.1.10
by Lee
move functions from item.cc/item.h to item directory |
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virtual void print(String *str, enum_query_type query_type); |
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/*
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we add RAND_TABLE_BIT to prevent moving this item from HAVING to WHERE
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*/
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table_map used_tables() const |
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{
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return (depended_from ? |
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OUTER_REF_TABLE_BIT : |
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(*ref)->used_tables() | RAND_TABLE_BIT); |
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}
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};
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1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
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} /* namespace drizzled */ |
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642.1.10
by Lee
move functions from item.cc/item.h to item directory |
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#endif /* DRIZZLED_ITEM_REF_NULL_HELPER_H */ |