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<?php
/**
* PartitionOptionsProcessor.php
*
* This file implements the processor for the PARTITION BY statements
* within CREATE TABLE.
*
* 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: $Id$
*
*/
namespace PHPSQLParser\processors;
use PHPSQLParser\utils\ExpressionType;
/**
* This class processes the PARTITION BY statements within CREATE TABLE.
*
* @author André Rothe <andre.rothe@phosco.info>
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
*
*/
class PartitionOptionsProcessor extends AbstractProcessor {
protected function processExpressionList($unparsed) {
$processor = new ExpressionListProcessor($this->options);
$expr = $this->removeParenthesisFromStart($unparsed);
$expr = $this->splitSQLIntoTokens($expr);
return $processor->process($expr);
}
protected function processColumnList($unparsed) {
$processor = new ColumnListProcessor($this->options);
$expr = $this->removeParenthesisFromStart($unparsed);
return $processor->process($expr);
}
protected function processPartitionDefinition($unparsed) {
$processor = new PartitionDefinitionProcessor($this->options);
$expr = $this->removeParenthesisFromStart($unparsed);
$expr = $this->splitSQLIntoTokens($expr);
return $processor->process($expr);
}
protected function getReservedType($token) {
return array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $token);
}
protected function getConstantType($token) {
return array('expr_type' => ExpressionType::CONSTANT, 'base_expr' => $token);
}
protected function getOperatorType($token) {
return array('expr_type' => ExpressionType::OPERATOR, 'base_expr' => $token);
}
protected function getBracketExpressionType($token) {
return array('expr_type' => ExpressionType::BRACKET_EXPRESSION, 'base_expr' => $token, 'sub_tree' => false);
}
public function process($tokens) {
$result = array('partition-options' => array(), 'last-parsed' => false);
$prevCategory = '';
$currCategory = '';
$parsed = array();
$expr = array();
$base_expr = '';
$skip = 0;
foreach ($tokens as $tokenKey => $token) {
$trim = trim($token);
$base_expr .= $token;
if ($skip > 0) {
$skip--;
continue;
}
if ($skip < 0) {
break;
}
if ($trim === '') {
continue;
}
$upper = strtoupper($trim);
switch ($upper) {
case 'PARTITION':
$currCategory = $upper;
$expr[] = $this->getReservedType($trim);
$parsed[] = array('expr_type' => ExpressionType::PARTITION, 'base_expr' => trim($base_expr),
'sub_tree' => false);
break;
case 'SUBPARTITION':
$currCategory = $upper;
$expr[] = $this->getReservedType($trim);
$parsed[] = array('expr_type' => ExpressionType::SUBPARTITION, 'base_expr' => trim($base_expr),
'sub_tree' => false);
break;
case 'BY':
if ($prevCategory === 'PARTITION' || $prevCategory === 'SUBPARTITION') {
$expr[] = $this->getReservedType($trim);
continue 2;
}
break;
case 'PARTITIONS':
case 'SUBPARTITIONS':
$currCategory = 'PARTITION_NUM';
$expr = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::' . substr($upper, 0, -1) . '_COUNT'),
'base_expr' => false, 'sub_tree' => array($this->getReservedType($trim)),
'storage' => substr($base_expr, 0, -strlen($token)));
$base_expr = $token;
continue 2;
case 'LINEAR':
// followed by HASH or KEY
$currCategory = $upper;
$expr[] = $this->getReservedType($trim);
continue 2;
case 'HASH':
case 'KEY':
$expr[] = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::' . $prevCategory . '_' . $upper),
'base_expr' => false, 'linear' => ($currCategory === 'LINEAR'), 'sub_tree' => false,
'storage' => substr($base_expr, 0, -strlen($token)));
$last = array_pop($parsed);
$last['by'] = trim($currCategory . ' ' . $upper); // $currCategory will be empty or LINEAR!
$last['sub_tree'] = $expr;
$parsed[] = $last;
$base_expr = $token;
$expr = array($this->getReservedType($trim));
$currCategory = $upper;
continue 2;
case 'ALGORITHM':
if ($currCategory === 'KEY') {
$expr[] = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::' . $prevCategory . '_KEY_ALGORITHM'),
'base_expr' => false, 'sub_tree' => false,
'storage' => substr($base_expr, 0, -strlen($token)));
$last = array_pop($parsed);
$subtree = array_pop($last['sub_tree']);
$subtree['sub_tree'] = $expr;
$last['sub_tree'][] = $subtree;
$parsed[] = $last;
unset($subtree);
unset($last);
$base_expr = $token;
$expr = array($this->getReservedType($trim));
$currCategory = $upper;
continue 2;
}
break;
case 'RANGE':
case 'LIST':
$expr[] = array('expr_type' => constant('PHPSQLParser\utils\ExpressionType::PARTITION_' . $upper), 'base_expr' => false,
'sub_tree' => false, 'storage' => substr($base_expr, 0, -strlen($token)));
$last = array_pop($parsed);
$last['by'] = $upper;
$last['sub_tree'] = $expr;
$parsed[] = $last;
unset($last);
$base_expr = $token;
$expr = array($this->getReservedType($trim));
$currCategory = $upper . '_EXPR';
continue 2;
case 'COLUMNS':
if ($currCategory === 'RANGE_EXPR' || $currCategory === 'LIST_EXPR') {
$expr[] = $this->getReservedType($trim);
$currCategory = substr($currCategory, 0, -4) . $upper;
continue 2;
}
break;
case '=':
if ($currCategory === 'ALGORITHM') {
// between ALGORITHM and a constant
$expr[] = $this->getOperatorType($trim);
continue 2;
}
break;
default:
switch ($currCategory) {
case 'PARTITION_NUM':
// the number behind PARTITIONS or SUBPARTITIONS
$expr['base_expr'] = trim($base_expr);
$expr['sub_tree'][] = $this->getConstantType($trim);
$base_expr = $expr['storage'] . $base_expr;
unset($expr['storage']);
$last = array_pop($parsed);
$last['count'] = $trim;
$last['sub_tree'][] = $expr;
$last['base_expr'] .= $base_expr;
$parsed[] = $last;
unset($last);
$expr = array();
$base_expr = '';
$currCategory = $prevCategory;
break;
case 'ALGORITHM':
// the number of the algorithm
$expr[] = $this->getConstantType($trim);
$last = array_pop($parsed);
$subtree = array_pop($last['sub_tree']);
$key = array_pop($subtree['sub_tree']);
$key['sub_tree'] = $expr;
$key['base_expr'] = trim($base_expr);
$base_expr = $key['storage'] . $base_expr;
unset($key['storage']);
$subtree['sub_tree'][] = $key;
unset($key);
$expr = $subtree['sub_tree'];
$subtree['sub_tree'] = false;
$subtree['algorithm'] = $trim;
$last['sub_tree'][] = $subtree;
unset($subtree);
$parsed[] = $last;
unset($last);
$currCategory = 'KEY';
continue 3;
case 'LIST_EXPR':
case 'RANGE_EXPR':
case 'HASH':
// parenthesis around an expression
$last = $this->getBracketExpressionType($trim);
$res = $this->processExpressionList($trim);
$last['sub_tree'] = (empty($res) ? false : $res);
$expr[] = $last;
$last = array_pop($parsed);
$subtree = array_pop($last['sub_tree']);
$subtree['base_expr'] = $base_expr;
$subtree['sub_tree'] = $expr;
$base_expr = $subtree['storage'] . $base_expr;
unset($subtree['storage']);
$last['sub_tree'][] = $subtree;
$last['base_expr'] = trim($base_expr);
$parsed[] = $last;
unset($last);
unset($subtree);
$expr = array();
$base_expr = '';
$currCategory = $prevCategory;
break;
case 'LIST_COLUMNS':
case 'RANGE_COLUMNS':
case 'KEY':
// the columnlist
$expr[] = array('expr_type' => ExpressionType::COLUMN_LIST, 'base_expr' => $trim,
'sub_tree' => $this->processColumnList($trim));
$last = array_pop($parsed);
$subtree = array_pop($last['sub_tree']);
$subtree['base_expr'] = $base_expr;
$subtree['sub_tree'] = $expr;
$base_expr = $subtree['storage'] . $base_expr;
unset($subtree['storage']);
$last['sub_tree'][] = $subtree;
$last['base_expr'] = trim($base_expr);
$parsed[] = $last;
unset($last);
unset($subtree);
$expr = array();
$base_expr = '';
$currCategory = $prevCategory;
break;
case '':
if ($prevCategory === 'PARTITION' || $prevCategory === 'SUBPARTITION') {
if ($upper[0] === '(' && substr($upper, -1) === ')') {
// last part to process, it is only one token!
$last = $this->getBracketExpressionType($trim);
$last['sub_tree'] = $this->processPartitionDefinition($trim);
$parsed[] = $last;
break;
}
}
// else ?
break;
default:
break;
}
break;
}
$prevCategory = $currCategory;
$currCategory = '';
}
$result['partition-options'] = $parsed;
if ($result['last-parsed'] === false) {
$result['last-parsed'] = $tokenKey;
}
return $result;
}
}
?>