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<?php
/**
* ColumnDefinitionProcessor.php
*
* This file implements the processor for column definition part of a CREATE TABLE statement.
*
* Copyright (c) 2010-2012, Justin Swanhart
* with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/
require_once dirname(__FILE__) . '/AbstractProcessor.php';
require_once dirname(__FILE__) . '/ReferenceDefinitionProcessor.php';
require_once dirname(__FILE__) . '/ExpressionListProcessor.php';
require_once dirname(__FILE__) . '/../utils/ExpressionType.php';
/**
*
* This class processes the column definition part of a CREATE TABLE statement.
*
* @author arothe
*
*/
class ColumnDefinitionProcessor extends AbstractProcessor {
protected function processExpressionList($parsed) {
$processor = new ExpressionListProcessor();
return $processor->process($parsed);
}
protected function processReferenceDefinition($parsed) {
$processor = new ReferenceDefinitionProcessor();
return $processor->process($parsed);
}
protected function removeComma($tokens) {
$res = array();
foreach ($tokens as $token) {
if (trim($token) !== ',') {
$res[] = $token;
}
}
return $res;
}
protected function buildColDef($expr, $base_expr, $options, $refs, $key) {
$expr = array('expr_type' => ExpressionType::COLUMN_TYPE, 'base_expr' => $base_expr, 'sub_tree' => $expr);
// add options first
$expr['sub_tree'] = array_merge($expr['sub_tree'], $options['sub_tree']);
unset($options['sub_tree']);
$expr = array_merge($expr, $options);
// followed by references
if (sizeof($refs) !== 0) {
$expr['sub_tree'] = array_merge($expr['sub_tree'], $refs);
}
$expr['till'] = $key;
return $expr;
}
public function process($tokens) {
$trim = '';
$base_expr = '';
$currCategory = '';
$expr = array();
$refs = array();
$options = array('unique' => false, 'nullable' => true, 'auto_inc' => false, 'primary' => false,
'sub_tree' => array());
$skip = 0;
foreach ($tokens as $key => $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 ',':
// we stop on a single comma and return
// the $expr entry and the index $key
$expr = $this->buildColDef($expr, trim(substr($base_expr, 0, -strlen($token))), $options, $refs,
$key - 1);
break 2;
case 'VARCHAR':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'length' => false);
$prevCategory = 'TEXT';
$currCategory = 'SINGLE_PARAM_PARENTHESIS';
continue 2;
case 'VARBINARY':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'length' => false);
$prevCategory = $upper;
$currCategory = 'SINGLE_PARAM_PARENTHESIS';
continue 2;
case 'UNSIGNED':
$last = array_pop($expr);
$last['unsigned'] = true;
$expr[] = $last;
continue 2;
case 'ZEROFILL':
$last = array_pop($expr);
$last['zerofill'] = true;
$expr[] = $last;
continue 2;
case 'BIT':
case 'TINYBIT':
case 'SMALLINT':
case 'MEDIUMINT':
case 'INT':
case 'INTEGER':
case 'BIGINT':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'unsigned' => false,
'zerofill' => false, 'length' => false);
$currCategory = 'SINGLE_PARAM_PARENTHESIS';
$prevCategory = $upper;
continue 2;
case 'BINARY':
if ($currCategory === 'TEXT') {
$last = array_pop($expr);
$last['binary'] = true;
$last['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$expr[] = $last;
continue 2;
}
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'length' => false);
$currCategory = 'SINGLE_PARAM_PARENTHESIS';
$prevCategory = $upper;
continue 2;
case 'CHAR':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'length' => false);
$currCategory = 'SINGLE_PARAM_PARENTHESIS';
$prevCategory = 'TEXT';
continue 2;
case 'REAL':
case 'DOUBLE':
case 'FLOAT':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'unsigned' => false,
'zerofill' => false);
$currCategory = 'TWO_PARAM_PARENTHESIS';
$prevCategory = $upper;
continue 2;
case 'DECIMAL':
case 'NUMERIC':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'unsigned' => false,
'zerofill' => false);
$currCategory = 'TWO_PARAM_PARENTHESIS';
$prevCategory = $upper;
continue 2;
case 'DATE':
case 'TIME':
case 'TIMESTAMP':
case 'DATETIME':
case 'YEAR':
case 'TINYBLOB':
case 'BLOB':
case 'MEDIUMBLOB':
case 'LONGBLOB':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim);
$prevCategory = $currCategory = $upper;
continue 2;
// the next token can be BINARY
case 'TINYTEXT':
case 'TEXT':
case 'MEDIUMTEXT':
case 'LONGTEXT':
$prevCategory = $currCategory = 'TEXT';
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim, 'binary' => false);
continue 2;
case 'ENUM':
case 'SET':
$currCategory = 'MULTIPLE_PARAM_PARENTHESIS';
$prevCategory = 'TEXT';
$expr[] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim, 'sub_tree' => false);
continue 2;
case 'GEOMETRY':
case 'POINT':
case 'LINESTRING':
case 'POLYGON':
case 'MULTIPOINT':
case 'MULTILINESTRING':
case 'MULTIPOLYGON':
case 'GEOMETRYCOLLECTION':
$expr[] = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim);
$prevCategory = $currCategory = $upper;
// TODO: is it right?
// spatial types
continue 2;
case 'CHARACTER':
if ($prevCategory === 'TEXT') {
$parsed = array('expr_type' => ExpressionType::DATA_TYPE, 'base_expr' => $trim);
$expr[] = array('expr_type' => ExpressionType::CHARSET, 'base_expr' => substr($base_expr, 0, -1),
'sub_tree' => $parsed);
$base_expr = $token;
$currCategory = 'CHARSET';
continue 2;
}
// else ?
break;
case 'SET':
if ($currCategory === 'CHARSET') {
// TODO: is it necessary to set special properties like the name or collation?
$parsed = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$last = array_pop($expr);
$last['sub_tree'][] = $parsed;
$expr[] = $last;
continue 2;
}
// else ?
break;
case 'COLLATE':
if ($prevCategory === 'TEXT') {
$parsed = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$expr[] = array('expr_type' => ExpressionType::COLLATE, 'base_expr' => substr($base_expr, 0, -1),
'sub_tree' => $parsed);
$base_expr = $token;
$currCategory = 'COLLATION';
continue 2;
}
// else ?
break;
case 'NOT':
case 'NULL':
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
if ($options['nullable']) {
$options['nullable'] = ($upper === 'NOT' ? false : true);
}
continue 2;
case 'DEFAULT':
case 'COMMENT':
$currCategory = $upper;
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
continue 2;
case 'AUTO_INCREMENT':
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$options['auto_inc'] = true;
continue 2;
case 'COLUMN_FORMAT':
case 'STORAGE':
$currCategory = $upper;
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
continue 2;
case 'UNIQUE':
// it can follow a KEY word
$currCategory = $upper;
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$options['unique'] = true;
continue 2;
case 'PRIMARY':
// it must follow a KEY word
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
continue 2;
case 'KEY':
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
if ($currCategory !== 'UNIQUE') {
$options['primary'] = true;
}
continue 2;
case 'REFERENCES':
$refs = $this->processReferenceDefinition(array_splice($tokens, $key - 1, null, true));
$skip = $refs['till'] - $key;
unset($refs['till']);
// TODO: check this, we need the last comma
continue 2;
default:
switch ($currCategory) {
case 'STORAGE':
if ($upper === 'DISK' || $upper === 'MEMORY' || $upper === 'DEFAULT') {
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$options['storage'] = $trim;
continue 3;
}
// else ?
break;
case 'COLUMN_FORMAT':
if ($upper === 'FIXED' || $upper === 'DYNAMIC' || $upper === 'DEFAULT') {
$options['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$options['col_format'] = $trim;
continue 3;
}
// else ?
break;
case 'COMMENT':
// this is the comment string
$options['sub_tree'][] = array('expr_type' => ExpressionType::COMMENT, 'base_expr' => $trim);
$options['comment'] = $trim;
$currCategory = $prevCategory;
break;
case 'DEFAULT':
// this is the default value
$options['sub_tree'][] = array('expr_type' => ExpressionType::DEF_VALUE, 'base_expr' => $trim);
$options['default'] = $trim;
$currCategory = $prevCategory;
break;
case 'COLLATE':
// this is the collation name
$parsed = array('expr_type' => ExpressionType::CONSTANT, 'base_expr' => $trim);
$last = array_pop($expr);
$last['sub_tree'][] = $parsed;
$t = $base_expr;
$base_expr = $last['base_expr'] . $base_expr;
$last['base_expr'] = $t;
$currCategory = $prevCategory;
break;
case 'CHARSET':
// this is the character set name
$parsed = array('expr_type' => ExpressionType::CONSTANT, 'base_expr' => $trim);
$last = array_pop($expr);
$last['sub_tree'][] = $parsed;
$t = $base_expr;
$base_expr = $last['base_expr'] . $base_expr;
$last['base_expr'] = $t;
$currCategory = $prevCategory;
break;
case 'SINGLE_PARAM_PARENTHESIS':
$parsed = $this->removeParenthesisFromStart($trim);
$parsed = array('expr_type' => ExpressionType::CONSTANT, 'base_expr' => trim($parsed));
$last = array_pop($expr);
$last['length'] = $parsed['base_expr'];
$expr[] = $last;
$expr[] = array('expr_type' => ExpressionType::BRACKET_EXPRESSION, 'base_expr' => $trim,
'sub_tree' => array($parsed));
$currCategory = $prevCategory;
break;
case 'TWO_PARAM_PARENTHESIS':
// maximum of two parameters
$parsed = $this->removeParenthesisFromStart($trim);
$parsed = $this->splitSQLIntoTokens($parsed);
$parsed = $this->removeComma($parsed);
$parsed = $this->processExpressionList($parsed);
// TODO: check that
$last = array_pop($expr);
$last['length'] = $parsed[0]['base_expr'];
$last['decimals'] = isset($parsed[1]) ? $parsed[1]['base_expr'] : false;
$expr[] = $last;
$expr[] = array('expr_type' => ExpressionType::BRACKET_EXPRESSION, 'base_expr' => $trim,
'sub_tree' => $parsed);
$currCategory = $prevCategory;
break;
case 'MULTIPLE_PARAM_PARENTHESIS':
// some parameters
$parsed = $this->removeParenthesisFromStart($trim);
$parsed = $this->splitSQLIntoTokens($parsed);
$parsed = $this->removeComma($parsed);
$this->processExpressionList($parsed);
$last = array_pop($expr);
$last['sub_tree'] = array('expr_type' => ExpressionType::BRACKET_EXPRESSION, 'base_expr' => $trim,
'sub_tree' => $parsed);
$expr[] = $last;
$currCategory = $prevCategory;
break;
default:
break;
}
}
$prevCategory = $currCategory;
$currCategory = '';
}
if (!isset($expr['till'])) {
// end of $tokens array
$expr = $this->buildColDef($expr, trim($base_expr), $options, $refs, -1);
}
return $expr;
}
}
?>
Zerion Mini Shell 1.0