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Rohit
356
tools/parser_sql/processors/TableProcessor.php
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356
tools/parser_sql/processors/TableProcessor.php
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<?php
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/**
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* TableProcessor.php
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*
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* This file implements the processor for the TABLE statements.
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*
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* Copyright (c) 2010-2012, Justin Swanhart
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* with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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require_once(dirname(__FILE__) . '/AbstractProcessor.php');
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require_once(dirname(__FILE__) . '/CreateDefinitionProcessor.php');
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require_once(dirname(__FILE__) . '/../utils/ExpressionType.php');
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/**
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*
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* This class processes the TABLE statements.
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*
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* @author arothe
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*
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*/
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class TableProcessor extends AbstractProcessor {
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protected function getReservedType($token) {
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return array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $token);
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}
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protected function getConstantType($token) {
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return array('expr_type' => ExpressionType::CONSTANT, 'base_expr' => $token);
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}
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protected function getOperatorType($token) {
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return array('expr_type' => ExpressionType::OPERATOR, 'base_expr' => $token);
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}
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protected function clear(&$expr, &$base_expr, &$category) {
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$expr = array();
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$base_expr = '';
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$category = 'CREATE_DEF';
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}
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public function process($tokens) {
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$currCategory = "TABLE_NAME";
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$result = array('base_expr' => false, 'name' => false, 'no_quotes' => false, 'create-def' => false,
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'options' => false, 'like' => false, 'select-option' => false);
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$expr = array();
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$base_expr = '';
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$skip = 0;
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foreach ($tokens as $token) {
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$trim = trim($token);
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$base_expr .= $token;
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if ($skip > 0) {
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$skip--;
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continue;
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}
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if ($skip < 0) {
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break;
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}
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if ($trim === "") {
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continue;
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}
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$upper = strtoupper($trim);
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switch ($upper) {
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case ',':
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# it is possible to separate the table options with comma!
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if ($prevCategory === 'CREATE_DEF') {
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$last = array_pop($result['options']);
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$last['delim'] = ',';
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$result['options'][] = $last;
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$base_expr = "";
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}
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continue 2;
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case 'UNION':
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if ($prevCategory === 'CREATE_DEF') {
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'UNION';
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continue 2;
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}
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break;
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case 'LIKE':
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# like without parenthesis
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if ($prevCategory === 'TABLE_NAME') {
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$currCategory = $upper;
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continue 2;
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}
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break;
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case '=':
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# the optional operator
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if ($prevCategory === 'TABLE_OPTION') {
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$expr[] = $this->getOperatorType($trim);
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continue 2; # don't change the category
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}
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break;
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case 'CHARACTER':
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if ($prevCategory === 'CREATE_DEF') {
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'TABLE_OPTION';
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}
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if ($prevCategory === 'TABLE_OPTION') {
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# add it to the previous DEFAULT
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$expr[] = $this->getReservedType($trim);
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continue 2;
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}
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break;
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case 'SET':
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if ($prevCategory === 'TABLE_OPTION') {
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# add it to a previous CHARACTER
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'CHARSET';
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continue 2;
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}
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break;
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case 'COLLATE':
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if ($prevCategory === 'TABLE_OPTION') {
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# add it to the previous DEFAULT
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'COLLATE';
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continue 2;
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}
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break;
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case 'DIRECTORY':
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if ($currCategory === 'INDEX_DIRECTORY' || $currCategory === 'DATA_DIRECTORY') {
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# after INDEX or DATA
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$expr[] = $this->getReservedType($trim);
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continue 2;
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}
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break;
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case 'INDEX':
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if ($prevCategory === 'CREATE_DEF') {
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'INDEX_DIRECTORY';
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continue 2;
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}
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break;
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case 'DATA':
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if ($prevCategory === 'CREATE_DEF') {
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'DATA_DIRECTORY';
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continue 2;
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}
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break;
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case 'INSERT_METHOD':
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case 'DELAY_KEY_WRITE':
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case 'ROW_FORMAT':
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case 'PASSWORD':
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case 'MAX_ROWS':
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case 'MIN_ROWS':
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case 'PACK_KEYS':
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case 'CHECKSUM':
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case 'COMMENT':
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case 'CONNECTION':
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case 'AUTO_INCREMENT':
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case 'AVG_ROW_LENGTH':
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case 'ENGINE':
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case 'TYPE':
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case 'STATS_AUTO_RECALC':
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case 'STATS_PERSISTENT':
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case 'KEY_BLOCK_SIZE':
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if ($prevCategory === 'CREATE_DEF') {
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$expr[] = $this->getReservedType($trim);
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$currCategory = $prevCategory = 'TABLE_OPTION';
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continue 2;
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}
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break;
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case 'DYNAMIC':
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case 'FIXED':
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case 'COMPRESSED':
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case 'REDUNDANT':
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case 'COMPACT':
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case 'NO':
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case 'FIRST':
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case 'LAST':
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case 'DEFAULT':
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if ($prevCategory === 'CREATE_DEF') {
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# DEFAULT before CHARACTER SET and COLLATE
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$expr[] = $this->getReservedType($trim);
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$currCategory = 'TABLE_OPTION';
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}
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if ($prevCategory === 'TABLE_OPTION') {
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# all assignments with the keywords
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$expr[] = $this->getReservedType($trim);
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$result['options'][] = array('expr_type' => ExpressionType::EXPRESSION,
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'base_expr' => trim($base_expr), 'delim' => ' ',
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'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $currCategory);
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}
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break;
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case 'IGNORE':
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case 'REPLACE':
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$expr[] = $this->getReservedType($trim);
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$result['select-option'] = array('base_expr' => trim($base_expr), 'duplicates' => $trim, 'as' => false,
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'sub_tree' => $expr);
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continue 2;
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case 'AS':
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$expr[] = $this->getReservedType($trim);
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if (!isset($result['select-option']['duplicates'])) {
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$result['select-option']['duplicates'] = false;
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}
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$result['select-option']['as'] = true;
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$result['select-option']['base_expr'] = trim($base_expr);
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$result['select-option']['sub_tree'] = $expr;
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continue 2;
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case 'PARTITION':
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# TODO: parse partition options
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$skip = -1;
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break;
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default:
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switch ($currCategory) {
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case 'CHARSET':
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# the charset name
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$expr[] = $this->getConstantType($trim);
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$result['options'][] = array('expr_type' => ExpressionType::CHARSET,
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'base_expr' => trim($base_expr), 'delim' => ' ',
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'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $currCategory);
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break;
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case 'COLLATE':
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# the collate name
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$expr[] = $this->getConstantType($trim);
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$result['options'][] = array('expr_type' => ExpressionType::COLLATE,
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'base_expr' => trim($base_expr), 'delim' => ' ',
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'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $currCategory);
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break;
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case 'DATA_DIRECTORY':
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# we have the directory name
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$expr[] = $this->getConstantType($trim);
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$result['options'][] = array('expr_type' => ExpressionType::DIRECTORY, 'kind' => 'DATA',
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'base_expr' => trim($base_expr), 'delim' => ' ',
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'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $prevCategory);
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continue 3;
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case 'INDEX_DIRECTORY':
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# we have the directory name
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$expr[] = $this->getConstantType($trim);
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$result['options'][] = array('expr_type' => ExpressionType::DIRECTORY, 'kind' => 'INDEX',
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'base_expr' => trim($base_expr), 'delim' => ' ',
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'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $prevCategory);
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continue 3;
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case 'TABLE_NAME':
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$result['base_expr'] = $result['name'] = $trim;
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$result['no_quotes'] = $this->revokeQuotation($trim);
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$this->clear($expr, $base_expr, $prevCategory);
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break;
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case 'LIKE':
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$result['like'] = array('expr_type' => ExpressionType::TABLE, 'table' => $trim, 'base_expr' => $trim,
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'no_quotes' => $this->revokeQuotation($trim));
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$this->clear($expr, $base_expr, $currCategory);
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break;
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case '':
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# after table name
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if ($prevCategory === 'TABLE_NAME' && $upper[0] === '(' && substr($upper, -1) === ')') {
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$unparsed = $this->splitSQLIntoTokens($this->removeParenthesisFromStart($trim));
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$processor = new CreateDefinitionProcessor();
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$coldef = $processor->process($unparsed);
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$result['create-def'] = array('expr_type' => ExpressionType::BRACKET_EXPRESSION,
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'base_expr' => $base_expr, 'sub_tree' => $coldef['create-def']);
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$expr = array();
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$base_expr = '';
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$currCategory = 'CREATE_DEF';
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}
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break;
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case 'UNION':
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# TODO: this token starts and ends with parenthesis
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# and contains a list of table names (comma-separated)
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# split the token and add the list as subtree
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# we must change the DefaultProcessor
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$unparsed = $this->splitSQLIntoTokens($this->removeParenthesisFromStart($trim));
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$expr[] = array('expr_type' => ExpressionType::BRACKET_EXPRESSION, 'base_expr' => $trim,
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'sub_tree' => '***TODO***');
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$result['options'][] = array('expr_type' => ExpressionType::UNION, 'base_expr' => trim($base_expr),
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'delim' => ' ', 'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $currCategory);
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break;
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default:
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# strings and numeric constants
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$expr[] = $this->getConstantType($trim);
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$result['options'][] = array('expr_type' => ExpressionType::EXPRESSION,
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'base_expr' => trim($base_expr), 'delim' => ' ',
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'sub_tree' => $expr);
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$this->clear($expr, $base_expr, $currCategory);
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break;
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}
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break;
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}
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$prevCategory = $currCategory;
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$currCategory = "";
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}
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if ($result['like'] === false) {
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unset($result['like']);
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}
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if ($result['select-option'] === false) {
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unset($result['select-option']);
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}
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return $result;
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}
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}
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?>
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