362 lines
14 KiB
PHP
362 lines
14 KiB
PHP
<?php
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/**
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* PartitionOptionsProcessor.php
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*
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* This file implements the processor for the PARTITION BY statements
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* within CREATE TABLE.
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*
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* PHP version 5
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*
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* LICENSE:
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* Copyright (c) 2010-2014 Justin Swanhart and André Rothe
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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
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @author André Rothe <andre.rothe@phosco.info>
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* @copyright 2010-2014 Justin Swanhart and André Rothe
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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* @version SVN: $Id$
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*
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*/
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namespace PHPSQLParser\processors;
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use PHPSQLParser\utils\ExpressionType;
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/**
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* This class processes the PARTITION BY statements within CREATE TABLE.
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*
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* @author André Rothe <andre.rothe@phosco.info>
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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*
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*/
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class PartitionOptionsProcessor extends AbstractProcessor {
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protected function processExpressionList($unparsed) {
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$processor = new ExpressionListProcessor($this->options);
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$expr = $this->removeParenthesisFromStart($unparsed);
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$expr = $this->splitSQLIntoTokens($expr);
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return $processor->process($expr);
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}
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protected function processColumnList($unparsed) {
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$processor = new ColumnListProcessor($this->options);
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$expr = $this->removeParenthesisFromStart($unparsed);
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return $processor->process($expr);
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}
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protected function processPartitionDefinition($unparsed) {
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$processor = new PartitionDefinitionProcessor($this->options);
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$expr = $this->removeParenthesisFromStart($unparsed);
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$expr = $this->splitSQLIntoTokens($expr);
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return $processor->process($expr);
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}
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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' => $token);
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}
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protected function getBracketExpressionType($token) {
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return array('expr_type' => ExpressionType::BRACKET_EXPRESSION, 'base_expr' => $token, 'sub_tree' => false);
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}
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public function process($tokens) {
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$result = array('partition-options' => array(), 'last-parsed' => false);
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$prevCategory = '';
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$currCategory = '';
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$parsed = array();
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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 $tokenKey => $token) {
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$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 'PARTITION':
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$currCategory = $upper;
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$expr[] = $this->getReservedType($trim);
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$parsed[] = array('expr_type' => ExpressionType::PARTITION, 'base_expr' => trim($base_expr),
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'sub_tree' => false);
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break;
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case 'SUBPARTITION':
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$currCategory = $upper;
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$expr[] = $this->getReservedType($trim);
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$parsed[] = array('expr_type' => ExpressionType::SUBPARTITION, 'base_expr' => trim($base_expr),
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'sub_tree' => false);
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break;
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case 'BY':
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if ($prevCategory === 'PARTITION' || $prevCategory === 'SUBPARTITION') {
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$expr[] = $this->getReservedType($trim);
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continue 2;
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}
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break;
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case 'PARTITIONS':
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case 'SUBPARTITIONS':
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$currCategory = 'PARTITION_NUM';
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$expr = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::' . substr($upper, 0, -1) . '_COUNT'),
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'base_expr' => false, 'sub_tree' => array($this->getReservedType($trim)),
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'storage' => substr($base_expr, 0, -strlen($token)));
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$base_expr = $token;
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continue 2;
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case 'LINEAR':
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// followed by HASH or KEY
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$currCategory = $upper;
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$expr[] = $this->getReservedType($trim);
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continue 2;
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case 'HASH':
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case 'KEY':
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$expr[] = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::' . $prevCategory . '_' . $upper),
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'base_expr' => false, 'linear' => ($currCategory === 'LINEAR'), 'sub_tree' => false,
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'storage' => substr($base_expr, 0, -strlen($token)));
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$last = array_pop($parsed);
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$last['by'] = trim($currCategory . ' ' . $upper); // $currCategory will be empty or LINEAR!
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$last['sub_tree'] = $expr;
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$parsed[] = $last;
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$base_expr = $token;
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$expr = array($this->getReservedType($trim));
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$currCategory = $upper;
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continue 2;
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case 'ALGORITHM':
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if ($currCategory === 'KEY') {
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$expr[] = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::' . $prevCategory . '_KEY_ALGORITHM'),
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'base_expr' => false, 'sub_tree' => false,
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'storage' => substr($base_expr, 0, -strlen($token)));
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$last = array_pop($parsed);
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$subtree = array_pop($last['sub_tree']);
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$subtree['sub_tree'] = $expr;
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$last['sub_tree'][] = $subtree;
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$parsed[] = $last;
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unset($subtree);
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unset($last);
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$base_expr = $token;
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$expr = array($this->getReservedType($trim));
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$currCategory = $upper;
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continue 2;
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}
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break;
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case 'RANGE':
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case 'LIST':
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$expr[] = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::PARTITION_' . $upper), 'base_expr' => false,
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'sub_tree' => false, 'storage' => substr($base_expr, 0, -strlen($token)));
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$last = array_pop($parsed);
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$last['by'] = $upper;
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$last['sub_tree'] = $expr;
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$parsed[] = $last;
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unset($last);
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$base_expr = $token;
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$expr = array($this->getReservedType($trim));
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$currCategory = $upper . '_EXPR';
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continue 2;
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case 'COLUMNS':
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if ($currCategory === 'RANGE_EXPR' || $currCategory === 'LIST_EXPR') {
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$expr[] = $this->getReservedType($trim);
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$currCategory = substr($currCategory, 0, -4) . $upper;
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continue 2;
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}
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break;
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case '=':
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if ($currCategory === 'ALGORITHM') {
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// between ALGORITHM and a constant
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$expr[] = $this->getOperatorType($trim);
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continue 2;
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}
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break;
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default:
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switch ($currCategory) {
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case 'PARTITION_NUM':
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// the number behind PARTITIONS or SUBPARTITIONS
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$expr['base_expr'] = trim($base_expr);
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$expr['sub_tree'][] = $this->getConstantType($trim);
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$base_expr = $expr['storage'] . $base_expr;
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unset($expr['storage']);
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$last = array_pop($parsed);
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$last['count'] = $trim;
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$last['sub_tree'][] = $expr;
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$last['base_expr'] .= $base_expr;
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$parsed[] = $last;
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unset($last);
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$expr = array();
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$base_expr = '';
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$currCategory = $prevCategory;
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break;
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case 'ALGORITHM':
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// the number of the algorithm
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$expr[] = $this->getConstantType($trim);
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$last = array_pop($parsed);
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$subtree = array_pop($last['sub_tree']);
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$key = array_pop($subtree['sub_tree']);
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$key['sub_tree'] = $expr;
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$key['base_expr'] = trim($base_expr);
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$base_expr = $key['storage'] . $base_expr;
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unset($key['storage']);
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$subtree['sub_tree'][] = $key;
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unset($key);
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$expr = $subtree['sub_tree'];
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$subtree['sub_tree'] = false;
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$subtree['algorithm'] = $trim;
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$last['sub_tree'][] = $subtree;
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unset($subtree);
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$parsed[] = $last;
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unset($last);
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$currCategory = 'KEY';
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continue 3;
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case 'LIST_EXPR':
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case 'RANGE_EXPR':
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case 'HASH':
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// parenthesis around an expression
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$last = $this->getBracketExpressionType($trim);
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$res = $this->processExpressionList($trim);
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$last['sub_tree'] = (empty($res) ? false : $res);
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$expr[] = $last;
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$last = array_pop($parsed);
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$subtree = array_pop($last['sub_tree']);
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$subtree['base_expr'] = $base_expr;
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$subtree['sub_tree'] = $expr;
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$base_expr = $subtree['storage'] . $base_expr;
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unset($subtree['storage']);
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$last['sub_tree'][] = $subtree;
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$last['base_expr'] = trim($base_expr);
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$parsed[] = $last;
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unset($last);
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unset($subtree);
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$expr = array();
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$base_expr = '';
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$currCategory = $prevCategory;
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break;
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case 'LIST_COLUMNS':
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case 'RANGE_COLUMNS':
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case 'KEY':
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// the columnlist
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$expr[] = array('expr_type' => ExpressionType::COLUMN_LIST, 'base_expr' => $trim,
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'sub_tree' => $this->processColumnList($trim));
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$last = array_pop($parsed);
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$subtree = array_pop($last['sub_tree']);
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$subtree['base_expr'] = $base_expr;
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$subtree['sub_tree'] = $expr;
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$base_expr = $subtree['storage'] . $base_expr;
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unset($subtree['storage']);
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$last['sub_tree'][] = $subtree;
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$last['base_expr'] = trim($base_expr);
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$parsed[] = $last;
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unset($last);
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unset($subtree);
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$expr = array();
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$base_expr = '';
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$currCategory = $prevCategory;
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break;
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case '':
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if ($prevCategory === 'PARTITION' || $prevCategory === 'SUBPARTITION') {
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if ($upper[0] === '(' && substr($upper, -1) === ')') {
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// last part to process, it is only one token!
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$last = $this->getBracketExpressionType($trim);
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$last['sub_tree'] = $this->processPartitionDefinition($trim);
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$parsed[] = $last;
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break;
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}
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}
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// else ?
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break;
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default:
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break;
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}
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break;
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}
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$prevCategory = $currCategory;
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$currCategory = '';
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}
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$result['partition-options'] = $parsed;
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if ($result['last-parsed'] === false) {
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$result['last-parsed'] = $tokenKey;
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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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