~drizzle-trunk/drizzle/development

934.2.2 by Jay Pipes
Forgot to add the new files...
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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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 *
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) 2008-2009 Sun Microsystems, Inc.
934.2.2 by Jay Pipes
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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; either version 2 of the License, or
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 *  (at your option) any later version.
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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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/**
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 * @file
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 *
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 * Defines the API for index hints
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 */
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2234 by Brian Aker
Mass removal of ifdef/endif in favor of pragma once.
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#pragma once
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2385.3.19 by Olaf van der Spek
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namespace drizzled {
1280.1.10 by Monty Taylor
Put everything in drizzled into drizzled namespace.
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934.2.2 by Jay Pipes
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/*
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  String names used to print a statement with index hints.
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  Keep in sync with index_hint_type.
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*/
2385.3.20 by Olaf van der Spek
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extern const char* index_hint_type_name[];
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typedef unsigned char index_clause_map;
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enum index_hint_type
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{
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  INDEX_HINT_IGNORE,
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  INDEX_HINT_USE,
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  INDEX_HINT_FORCE
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};
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/*
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  Bits in index_clause_map : one for each possible FOR clause in
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  USE/FORCE/IGNORE INDEX index hint specification
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*/
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#define INDEX_HINT_MASK_JOIN  (1)
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#define INDEX_HINT_MASK_GROUP (1 << 1)
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#define INDEX_HINT_MASK_ORDER (1 << 2)
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2385.3.20 by Olaf van der Spek
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#define INDEX_HINT_MASK_ALL (INDEX_HINT_MASK_JOIN | INDEX_HINT_MASK_GROUP | INDEX_HINT_MASK_ORDER)
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/* Single element of an USE/FORCE/IGNORE INDEX list specified as a SQL hint  */
1280.1.10 by Monty Taylor
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class Index_hint : public memory::SqlAlloc
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{
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public:
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  /* The type of the hint : USE/FORCE/IGNORE */
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  index_hint_type type;
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  /* Where the hit applies to. A bitmask of INDEX_HINT_MASK_<place> values */
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  index_clause_map clause;
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  /*
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    The index name. Empty (str=NULL) name represents an empty list
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    USE INDEX () clause
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  */
2385.3.20 by Olaf van der Spek
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  const char* key_name;
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2385.3.21 by Olaf van der Spek
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  Index_hint(index_hint_type type_arg, index_clause_map clause_arg, const char *str) :
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    type(type_arg), clause(clause_arg), key_name(str)
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  {
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  }
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2385.3.21 by Olaf van der Spek
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  void print(String&) const;
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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 */