<?php
/**
 * ExpressionType.php
 *
 * Defines all values, which are possible for the [expr_type] field 
 * within the parser output.
 *
 * PHP version 5
 *
 * LICENSE:
 * Copyright (c) 2010-2014 Justin Swanhart and André Rothe
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * @author    André Rothe <andre.rothe@phosco.info>
 * @copyright 2010-2014 Justin Swanhart and André Rothe
 * @license   http://www.debian.org/misc/bsd.license  BSD License (3 Clause)
 * @version   SVN: $Id: ExpressionType.php 836 2013-12-20 05:31:55Z phosco@gmx.de $
 * 
 */

/**
 * This class defines all values, which are possible for the [expr_type] field 
 * within the parser output.
 *
 * @author  André Rothe <andre.rothe@phosco.info>
 * @license http://www.debian.org/misc/bsd.license  BSD License (3 Clause)
 *
 */
class ExpressionType {

    const USER_VARIABLE = "user_variable";
    const SESSION_VARIABLE = "session_variable";
    const GLOBAL_VARIABLE = "global_variable";
    const LOCAL_VARIABLE = "local_variable";

    const COLDEF = "column-def";
    const COLREF = "colref";
    const RESERVED = "reserved";
    const CONSTANT = "const";

    const AGGREGATE_FUNCTION = "aggregate_function";
    const SIMPLE_FUNCTION = "function";

    const EXPRESSION = "expression";
    const BRACKET_EXPRESSION = "bracket_expression";
    const TABLE_EXPRESSION = "table_expression";

    const SUBQUERY = "subquery";
    const IN_LIST = "in-list";
    const OPERATOR = "operator";
    const SIGN = "sign";
    const RECORD = "record";

    const MATCH_ARGUMENTS = "match-arguments";
    const MATCH_MODE = "match-mode";

    const ALIAS = "alias";
    const POSITION = "pos";

    const TEMPORARY_TABLE = "temporary-table";
    const TABLE = "table";
    const VIEW = "view";
    const DATABASE = "database";
    const SCHEMA = "schema";

    const PROCEDURE = "procedure";
    const ENGINE = "engine";
    const USER = "user";
    const DIRECTORY = "directory";
    const UNION = "union";
    const CHARSET = "character-set";
    const COLLATE = "collation";

    const LIKE = "like";
    const CONSTRAINT = "constraint";
    const PRIMARY_KEY = "primary-key";
    const FOREIGN_KEY = "foreign-key";
    const UNIQUE_IDX = "unique-index";
    const INDEX = "index";
    const FULLTEXT_IDX = "fulltext-index";
    const SPATIAL_IDX = "spatial-index";
    const INDEX_TYPE = "index-type";
    const CHECK = "check";
    const COLUMN_LIST = "column-list";
    const INDEX_COLUMN = "index-column";
    const INDEX_SIZE = "index-size";
    const INDEX_PARSER = "index-parser";
    const REFERENCE = "foreign-ref";

    const DATA_TYPE = "data-type";
    const COLUMN_TYPE = "column-type";
    const DEF_VALUE = "default-value";
}
?>
