581 lines
23 KiB
PHP
581 lines
23 KiB
PHP
<?php
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/**
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* The class for manipulating ALTER query.
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*
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* newly supports multiple variants
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*
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* @package SQLite Integration
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* @author Kojima Toshiyasu
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*/
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class AlterQuery {
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/**
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* Variable to store the rewritten query string.
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* @var string
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*/
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public $_query = null;
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/**
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* Function to split the query string to the tokens and call apropreate functions.
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*
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* @param string @query
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* @parm string $query_type
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* @return boolean | stirng
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*/
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public function rewrite_query($query, $query_type) {
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if (stripos($query, $query_type) === false) {
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return false;
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}
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$query = str_replace('`', '', $query);
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if (preg_match('/^\\s*(ALTER\\s*TABLE)\\s*(\\w+)?\\s*/ims', $query, $match)) {
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$tmp_query = array();
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$tokens = array();
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$re_command = '';
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$command = str_ireplace($match[0], '', $query);
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$tmp_tokens['query_type'] = trim($match[1]);
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$tmp_tokens['table_name'] = trim($match[2]);
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// $command_array = $this->split_multiple($command);
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$command_array = explode(',', $command);
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$single_command = array_shift($command_array);
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if (!empty($command_array)) {
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$re_command = 'ALTER TABLE ' . $tmp_tokens['table_name'] . ' ';
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$re_command .= implode(',', $command_array);
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}
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$command_tokens = $this->command_tokenizer($single_command);
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if (!empty($command_tokens)) {
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$tokens = array_merge($tmp_tokens, $command_tokens);
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} else {
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$this->_query = 'SELECT 1=1';
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return $this->_query;
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}
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// foreach ($tokens as $token) {
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$command_name = strtolower($tokens['command']);
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switch ($command_name) {
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case 'add column': case 'rename to': case 'add index': case 'drop index':
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$tmp_query = $this->handle_single_command($tokens);
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break;
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case 'add primary key':
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$tmp_query = $this->handle_add_primary_key($tokens);
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break;
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case 'drop primary key':
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$tmp_query = $this->handle_drop_primary_key($tokens);
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break;
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case 'modify column':
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$tmp_query = $this->handle_modify_command($tokens);
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break;
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case 'change column':
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$tmp_query = $this->handle_change_command($tokens);
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break;
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case 'alter column':
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$tmp_query = $this->handle_alter_command($tokens);
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break;
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default:
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break;
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}
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// }
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if (!is_array($tmp_query)) {
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$this->_query[] = $tmp_query;
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} else {
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$this->_query = $tmp_query;
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}
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if ($re_command != '') {
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$this->_query = array_merge($this->_query, array('recursion' => $re_command));
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}
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} else {
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$this->_query = 'SELECT 1=1';
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}
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return $this->_query;
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}
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/**
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* Function to analyze ALTER TABLE command and sets the data to an array.
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*
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* @param string $command
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* @return boolean|array
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* @access private
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*/
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private function command_tokenizer($command) {
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$tokens = array();
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if (preg_match('/^(ADD|DROP|RENAME|MODIFY|CHANGE|ALTER)\\s*(\\w+)?\\s*(\\w+(\(.+\)|))?\\s*/ims', $command, $match)) {
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$the_rest = str_ireplace($match[0], '', $command);
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$match_1 = trim($match[1]);
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$match_2 = trim($match[2]);
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$match_3 = isset($match[3]) ? trim($match[3]) : '';
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switch (strtolower($match_1)) {
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case 'add':
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if (in_array(strtolower($match_2), array('fulltext', 'constraint', 'foreign'))) {
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break;
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} elseif (stripos('column', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['column_name'] = $match_3;
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$tokens['column_def'] = trim($the_rest);
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} elseif (stripos('primary', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2.' '.$match_3;
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$tokens['column_name'] = $the_rest;
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} elseif (stripos('unique', $match_2) !== false) {
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list($index_name, $col_name) = preg_split('/[\(\)]/s', trim($the_rest), -1, PREG_SPLIT_DELIM_CAPTURE);
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$tokens['unique'] = true;
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$tokens['command'] = $match_1.' '.$match_3;
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$tokens['index_name'] = trim($index_name);
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$tokens['column_name'] = '('.trim($col_name).')';
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} elseif (in_array(strtolower($match_2), array('index', 'key'))) {
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$tokens['command'] = $match_1.' '.$match_2;
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if ($match_3 == '') {
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$tokens['index_name'] = str_replace(array('(', ')'), '', $the_rest);
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} else {
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$tokens['index_name'] = $match_3;
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}
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$tokens['column_name'] = trim($the_rest);
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} else {
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$tokens['command'] = $match_1.' COLUMN';
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$tokens['column_name'] = $match_2;
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$tokens['column_def'] = $match_3.' '.$the_rest;
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}
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break;
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case 'drop':
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if (stripos('column', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['column_name'] = trim($match_3);
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} elseif (stripos('primary', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2.' '.$match_3;
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} elseif (in_array(strtolower($match_2), array('index', 'key'))) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['index_name'] = $match_3;
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} elseif (stripos('primary', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2.' '.$match_3;
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} else {
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$tokens['command'] = $match_1.' COLUMN';
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$tokens['column_name'] = $match_2;
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}
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break;
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case 'rename':
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if (stripos('to', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['column_name'] = $match_3;
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} else {
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$tokens['command'] = $match_1.' TO';
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$tokens['column_name'] = $match_2;
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}
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break;
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case 'modify':
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if (stripos('column', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['column_name'] = $match_3;
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$tokens['column_def'] = trim($the_rest);
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} else {
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$tokens['command'] = $match_1.' COLUMN';
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$tokens['column_name'] = $match_2;
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$tokens['column_def'] = $match_3.' '.trim($the_rest);
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}
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break;
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case 'change':
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$the_rest = trim($the_rest);
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if (stripos('column', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['old_column'] = $match_3;
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list($new_col) = explode(' ', $the_rest);
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$tmp_col = preg_replace('/\(.+?\)/im', '', $new_col);
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if (array_key_exists(strtolower($tmp_col), $this->array_types)) {
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$tokens['column_def'] = $the_rest;
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} else {
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$tokens['new_column'] = $new_col;
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$col_def = str_replace($new_col, '', $the_rest);
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$tokens['column_def'] = trim($col_def);
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}
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} else {
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$tokens['command'] = $match_1.' column';
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$tokens['old_column'] = $match_2;
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$tmp_col = preg_replace('/\(.+?\)/im', '', $match_3);
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if (array_key_exists(strtolower($tmp_col), $this->array_types)) {
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$tokens['column_def'] = $match_3 . ' ' . $the_rest;
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} else {
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$tokens['new_column'] = $match_3;
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$tokens['column_def'] = $the_rest;
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}
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}
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break;
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case 'alter':
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if (stripos('column', $match_2) !== false) {
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$tokens['command'] = $match_1.' '.$match_2;
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$tokens['column_name'] = $match_3;
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list($set_or_drop) = explode(' ', $the_rest);
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if (stripos('set', $set_or_drop) !== false) {
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$tokens['default_command'] = 'SET DEFAULT';
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$default_value = str_ireplace('set default', '', $the_rest);
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$tokens['default_value'] = trim($default_value);
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} else {
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$tokens['default_command'] = 'DROP DEFAULT';
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}
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} else {
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$tokens['command'] = $match_1.' COLUMN';
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$tokens['column_name'] = $match_2;
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if (stripos('set', $match_3) !== false) {
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$tokens['default_command'] = 'SET DEFAULT';
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$default_value = str_ireplace('default', '', $the_rest);
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$tokens['default_value'] = trim($default_value);
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} else {
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$tokens['default_command'] = 'DROP DEFAULT';
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}
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}
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break;
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default:
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break;
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}
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return $tokens;
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}
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}
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/**
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* Function to split multiple commands into an array and return it.
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*
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* This function is deprecated.
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*
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* @access private
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* @param unknown $command
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* @return multitype:string unknown Ambigous <string, unknown>
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*/
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private function split_multiple($command) {
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$out = true;
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$command_array = array();
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$command_string = '';
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$tokens = preg_split('/\b/s', $command, -1, PREG_SPLIT_DELIM_CAPTURE);
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foreach ($tokens as $token) {
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switch (trim($token)) {
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case ';':
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break;
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case '(':
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$command_string .= $token;
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$out = false;
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break;
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case ')':
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$command_string .= $token;
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$out = true;
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break;
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case '),':
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$command_array[] = $command_string;
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$command_string = '';
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$out = true;
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break;
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case ',':
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if ($out) {
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$command_array[] = $command_string;
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$command_string = '';
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} else {
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$command_string .= $token;
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}
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break;
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default:
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$command_string .= $token;
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break;
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}
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}
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if (!empty($command_string)) {
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$command_array[] = $command_string;
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}
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return $command_array;
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}
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/**
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* Function to handle single command.
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*
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* @access private
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* @param array of string $queries
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* @return string
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*/
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private function handle_single_command($queries) {
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$tokenized_query = $queries;
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if (stripos($tokenized_query['command'], 'add column') !== false) {
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$column_def = $this->convert_field_types($tokenized_query['column_name'], $tokenized_query['column_def']);
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$query = "ALTER TABLE {$tokenized_query['table_name']} ADD COLUMN {$tokenized_query['column_name']} $column_def";
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} elseif (stripos($tokenized_query['command'], 'rename') !== false) {
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$query = "ALTER TABLE {$tokenized_query['table_name']} RENAME TO {$tokenized_query['column_name']}";
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} elseif (stripos($tokenized_query['command'], 'add index') !== false) {
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$unique = isset($tokenized_query['unique']) ? 'UNIQUE' : '';
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$query = "CREATE $unique INDEX IF NOT EXISTS {$tokenized_query['index_name']} ON {$tokenized_query['table_name']} {$tokenized_query['column_name']}";
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} elseif (stripos($tokenized_query['command'], 'drop index') !== false) {
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$query = "DROP INDEX IF EXISTS {$tokenized_query['index_name']}";
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} else {
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$query = 'SELECT 1=1';
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}
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return $query;
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}
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/**
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* Function to handle ADD PRIMARY KEY.
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*
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* @access private
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* @param array of string $queries
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* @return array of string
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*/
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private function handle_add_primary_key($queries) {
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$tokenized_query = $queries;
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$tbl_name = $tokenized_query['table_name'];
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$temp_table = 'temp_'.$tokenized_query['table_name'];
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$_wpdb = new PDODB();
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$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='$tbl_name'");
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$_wpdb = null;
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for ($i = 0; $i < count($query_obj); $i++) {
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$index_queries[$i] = $query_obj[$i]->sql;
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}
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$table_query = array_shift($index_queries);
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$table_query = str_replace($tokenized_query['table_name'], $temp_table, $table_query);
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$table_query = rtrim($table_query, ')');
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$table_query = ", PRIMARY KEY {$tokenized_query['column_name']}";
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$query[] = $table_query;
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$query[] = "INSERT INTO $temp_table SELECT * FROM {$tokenized_query['table_name']}";
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$query[] = "DROP TABLE IF EXISTS {$tokenized_query['table_name']}";
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$query[] = "ALTER TABLE $temp_table RENAME TO {$tokenized_query['table_name']}";
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foreach ($index_queries as $index) {
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$query[] = $index;
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}
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return $query;
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}
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/**
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* Function to handle DROP PRIMARY KEY.
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*
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* @access private
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* @param array of string $queries
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* @return array of string
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*/
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private function handle_drop_primary_key($queries) {
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$tokenized_query = $queries;
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$temp_table = 'temp_'.$tokenized_query['table_name'];
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$_wpdb = new PDODB();
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$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='{$tokenized_query['table_name']}'");
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$_wpdb = null;
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for ($i = 0; $i < count($query_obj); $i++) {
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$index_queries[$i] = $query_obj[$i]->sql;
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}
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$table_query = array_shift($index_queries);
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$pattern1 = '/^\\s*PRIMARY\\s*KEY\\s*\(.*\)/im';
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$pattern2 = '/^\\s*.*(PRIMARY\\s*KEY\\s*(:?AUTOINCREMENT|))\\s*(?!\()/im';
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if (preg_match($pattern1, $table_query, $match)) {
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$table_query = str_replace($match[0], '', $table_query);
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} elseif (preg_match($pattern2, $table_query, $match)) {
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$table_query = str_replace($match[1], '', $table_query);
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}
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$table_query = str_replace($tokenized_query['table_name'], $temp_table, $table_query);
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$query[] = $table_query;
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$query[] = "INSERT INTO $temp_table SELECT * FROM {$tokenized_query['table_name']}";
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$query[] = "DROP TABLE IF EXISTS {$tokenized_query['table_name']}";
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$query[] = "ALTER TABLE $temp_table RENAME TO {$tokenized_query['table_name']}";
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foreach ($index_queries as $index) {
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$query[] = $index;
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}
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return $query;
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}
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/**
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* Function to handle MODIFY COLUMN.
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*
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* @access private
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* @param array of string $queries
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* @return string|array of string
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*/
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private function handle_modify_command($queries) {
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$tokenized_query = $queries;
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$temp_table = 'temp_'.$tokenized_query['table_name'];
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$column_def = $this->convert_field_types($tokenized_query['column_name'], $tokenized_query['column_def']);
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$_wpdb = new PDODB();
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$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='{$tokenized_query['table_name']}'");
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$_wpdb = null;
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for ($i =0; $i < count($query_obj); $i++) {
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$index_queries[$i] = $query_obj[$i]->sql;
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}
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$create_query = array_shift($index_queries);
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if (stripos($create_query, $tokenized_query['column_name']) === false) {
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return 'SELECT 1=1';
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} elseif (preg_match("/{$tokenized_query['column_name']}\\s*{$column_def}\\s*[,)]/i", $create_query)) {
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return 'SELECT 1=1';
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}
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$create_query = preg_replace("/{$tokenized_query['table_name']}/i", $temp_table, $create_query);
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if (preg_match("/\\b{$tokenized_query['column_name']}\\s*.*(?=,)/ims", $create_query)) {
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$create_query = preg_replace("/\\b{$tokenized_query['column_name']}\\s*.*(?=,)/ims", "{$tokenized_query['column_name']} {$column_def}", $create_query);
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} elseif (preg_match("/\\b{$tokenized_query['column_name']}\\s*.*(?=\))/ims", $create_query)) {
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$create_query = preg_replace("/\\b{$tokenized_query['column_name']}\\s*.*(?=\))/ims", "{$tokenized_query['column_name']} {$column_def}", $create_query);
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}
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$query[] = $create_query;
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$query[] = "INSERT INTO $temp_table SELECT * FROM {$tokenized_query['table_name']}";
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$query[] = "DROP TABLE IF EXISTS {$tokenized_query['table_name']}";
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$query[] = "ALTER TABLE $temp_table RENAME TO {$tokenized_query['table_name']}";
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foreach ($index_queries as $index) {
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$query[] = $index;
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}
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return $query;
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}
|
|
/**
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* Function to handle CHANGE COLUMN.
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*
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* @access private
|
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* @param array of string $queries
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* @return string|array of string
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*/
|
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private function handle_change_command($queries) {
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$col_check = false;
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$old_fields = '';
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$new_fields = '';
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$tokenized_query = $queries;
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$temp_table = 'temp_'.$tokenized_query['table_name'];
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if (isset($tokenized_query['new_column'])) {
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$column_name = $tokenized_query['new_column'];
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} else {
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$column_name = $tokenized_query['old_column'];
|
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}
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$column_def = $this->convert_field_types($column_name, $tokenized_query['column_def']);
|
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$_wpdb = new PDODB();
|
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$col_obj = $_wpdb->get_results("SHOW COLUMNS FROM {$tokenized_query['table_name']}");
|
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foreach ($col_obj as $col) {
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if (stripos($col->Field, $tokenized_query['old_column']) !== false) $col_check = true;
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$old_fields .= $col->Field . ',';
|
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}
|
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if ($col_check == false) {
|
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$_wpdb = null;
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return 'SELECT 1=1';
|
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}
|
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$old_fields = rtrim($old_fields, ',');
|
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$new_fields = str_ireplace($tokenized_query['old_column'], $column_name, $old_fields);
|
|
$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='{$tokenized_query['table_name']}'");
|
|
$_wpdb = null;
|
|
for ($i = 0; $i < count($query_obj); $i++) {
|
|
$index_queries[$i] = $query_obj[$i]->sql;
|
|
}
|
|
$create_query = array_shift($index_queries);
|
|
$create_query = preg_replace("/{$tokenized_query['table_name']}/i", $temp_table, $create_query);
|
|
if (preg_match("/\\b{$tokenized_query['old_column']}\\s*(.+?)(?=,)/ims", $create_query, $match)) {
|
|
if (stripos(trim($match[1]), $column_def) !== false) {
|
|
return 'SELECT 1=1';
|
|
} else {
|
|
$create_query = preg_replace("/\\b{$tokenized_query['old_column']}\\s*.+?(?=,)/ims", "{$column_name} {$column_def}", $create_query, 1);
|
|
}
|
|
} elseif (preg_match("/\\b{$tokenized_query['old_column']}\\s*(.+?)(?=\))/ims", $create_query, $match)) {
|
|
if (stripos(trim($match[1]), $column_def) !== false) {
|
|
return 'SELECT 1=1';
|
|
} else {
|
|
$create_query = preg_replace("/\\b{$tokenized_query['old_column']}\\s*.*(?=\))/ims", "{$column_name} {$column_def}", $create_query, 1);
|
|
}
|
|
}
|
|
$query[] = $create_query;
|
|
$query[] = "INSERT INTO $temp_table ($new_fields) SELECT $old_fields FROM {$tokenized_query['table_name']}";
|
|
$query[] = "DROP TABLE IF EXISTS {$tokenized_query['table_name']}";
|
|
$query[] = "ALTER TABLE $temp_table RENAME TO {$tokenized_query['table_name']}";
|
|
foreach ($index_queries as $index) {
|
|
$query[] = $index;
|
|
}
|
|
return $query;
|
|
}
|
|
/**
|
|
* Function to handle ALTER COLUMN.
|
|
*
|
|
* @access private
|
|
* @param array of string $queries
|
|
* @return string|array of string
|
|
*/
|
|
private function handle_alter_command($queries) {
|
|
$tokenized_query = $queries;
|
|
$temp_table = 'temp_'.$tokenized_query['table_name'];
|
|
if (isset($tokenized_query['default_value'])) {
|
|
$def_value = $this->convert_field_types($tokenized_query['column_name'], $tokenized_query['default_value']);
|
|
$def_value = 'DEFAULT '.$def_value;
|
|
} else {
|
|
$def_value = null;
|
|
}
|
|
$_wpdb = new PDODB();
|
|
$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='{$tokenized_query['table_name']}'");
|
|
$_wpdb = null;
|
|
for ($i =0; $i < count($query_obj); $i++) {
|
|
$index_queries[$i] = $query_obj[$i]->sql;
|
|
}
|
|
$create_query = array_shift($index_queries);
|
|
if (stripos($create_query, $tokenized_query['column_name']) === false) {
|
|
return 'SELECT 1=1';
|
|
}
|
|
if (preg_match("/\\s*({$tokenized_query['column_name']})\\s*(.*)?(DEFAULT\\s*.*)[,)]/im", $create_query, $match)) {
|
|
$col_name = trim($match[1]);
|
|
$col_def = trim($match[2]);
|
|
$col_def_esc = str_replace(array('(', ')'), array('\(', '\)'), $col_def);
|
|
$checked_col_def = $this->convert_field_types($col_name, $col_def);
|
|
$old_default = trim($match[3]);
|
|
$pattern = "/$col_name\\s*$col_def_esc\\s*$old_default/im";
|
|
if (is_null($def_value)) {
|
|
$replacement = $col_name . ' ' . $checked_col_def;
|
|
} else {
|
|
$replacement = $col_name . ' ' . $checked_col_def . ' ' . $def_value;
|
|
}
|
|
$create_query = preg_replace($pattern, $replacement, $create_query);
|
|
$create_query = str_ireplace($tokenized_query['table_name'], $temp_table, $create_query);
|
|
} elseif (preg_match("/\\s*({$tokenized_query['column_name']})\\s*(.*)?[,)]/im", $create_query, $match)) {
|
|
$col_name = trim($match[1]);
|
|
$col_def = trim($match[2]);
|
|
$col_def_esc = str_replace(array('(', ')'), array('\(', '\)'), $col_def);
|
|
$checked_col_def = $this->convert_field_types($col_name, $col_def);
|
|
$pattern = "/$col_name\\s*$col_def_esc/im";
|
|
if (is_null($def_value)) {
|
|
$replacement = $col_name . ' ' . $checked_col_def;
|
|
} else {
|
|
$replacement = $col_name . ' ' . $checked_col_def . ' ' . $def_value;
|
|
}
|
|
$create_query = preg_replace($pattern, $replacement, $create_query);
|
|
$create_query = str_ireplace($tokenized_query['table_name'], $temp_table, $create_query);
|
|
} else {
|
|
return 'SELECT 1=1';
|
|
}
|
|
$query[] = $create_query;
|
|
$query[] = "INSERT INTO $temp_table SELECT * FROM {$tokenized_query['table_name']}";
|
|
$query[] = "DROP TABLE IF EXISTS {$tokenized_query['table_name']}";
|
|
$query[] = "ALTER TABLE $temp_table RENAME TO {$tokenized_query['table_name']}";
|
|
foreach ($index_queries as $index) {
|
|
$query[] = $index;
|
|
}
|
|
return $query;
|
|
}
|
|
/**
|
|
* Function to change the field definition to SQLite compatible data type.
|
|
*
|
|
* @access private
|
|
* @param string $col_name
|
|
* @param string $col_def
|
|
* @return string
|
|
*/
|
|
private function convert_field_types($col_name, $col_def){
|
|
$array_curtime = array('current_timestamp', 'current_time', 'current_date');
|
|
$array_reptime = array("'0000-00-00 00:00:00'", "'0000-00-00 00:00:00'", "'0000-00-00'");
|
|
$def_string = str_replace('`', '', $col_def);
|
|
foreach ($this->array_types as $o=>$r){
|
|
$pattern = "/\\b$o\\s*(\([^\)]*\)*)?\\s*/ims";
|
|
if (preg_match($pattern, $def_string)) {
|
|
$def_string = preg_replace($pattern, "$r ", $def_string);
|
|
break;
|
|
}
|
|
}
|
|
$def_string = preg_replace('/unsigned/im', '', $def_string);
|
|
$def_string = preg_replace('/auto_increment/im', 'PRIMARY KEY AUTOINCREMENT', $def_string);
|
|
// when you use ALTER TABLE ADD, you can't use current_*. so we replace
|
|
$def_string = str_ireplace($array_curtime, $array_reptime, $def_string);
|
|
// colDef is enum
|
|
$pattern_enum = '/enum\((.*?)\)([^,\)]*)/ims';
|
|
if (preg_match($pattern_enum, $col_def, $matches)) {
|
|
$def_string = 'TEXT' . $matches[2] . ' CHECK (' . $col_name . ' IN (' . $matches[1] . '))';
|
|
}
|
|
return $def_string;
|
|
}
|
|
/**
|
|
* Variable to store the data definition table.
|
|
*
|
|
* @access private
|
|
* @var associative array
|
|
*/
|
|
private $array_types = array(
|
|
'bit' => 'INTEGER', 'bool' => 'INTEGER',
|
|
'boolean' => 'INTEGER', 'tinyint' => 'INTEGER',
|
|
'smallint' => 'INTEGER', 'mediumint' => 'INTEGER',
|
|
'bigint' => 'INTEGER', 'integer' => 'INTEGER',
|
|
'int' => 'INTEGER', 'float' => 'REAL',
|
|
'double' => 'REAL', 'decimal' => 'REAL',
|
|
'dec' => 'REAL', 'numeric' => 'REAL',
|
|
'fixed' => 'REAL', 'datetime' => 'TEXT',
|
|
'date' => 'TEXT', 'timestamp' => 'TEXT',
|
|
'time' => 'TEXT', 'year' => 'TEXT',
|
|
'varchar' => 'TEXT', 'char' => 'TEXT',
|
|
'varbinary' => 'BLOB', 'binary' => 'BLOB',
|
|
'tinyblob' => 'BLOB', 'mediumblob' => 'BLOB',
|
|
'longblob' => 'BLOB', 'blob' => 'BLOB',
|
|
'tinytext' => 'TEXT', 'mediumtext' => 'TEXT',
|
|
'longtext' => 'TEXT', 'text' => 'TEXT'
|
|
);
|
|
}
|
|
?>
|