455 lines
19 KiB
PHP
455 lines
19 KiB
PHP
<?php
|
|
/**
|
|
* The class for manipulating ALTER query
|
|
* newly supports multiple variants
|
|
* @package SQLite Integration
|
|
* @author Kojima Toshiyasu
|
|
*/
|
|
class AlterQuery {
|
|
public $_query = null;
|
|
|
|
public function rewrite_query($query, $query_type) {
|
|
$tokens = array();
|
|
if (stripos($query, $query_type) === false) {
|
|
return false;
|
|
}
|
|
$query = str_replace('`', '', $query);
|
|
if (preg_match('/^\\s*(ALTER\\s*TABLE)\\s*(\\w+)?\\s*/ims', $query, $match)) {
|
|
$command = str_ireplace($match[0], '', $query);
|
|
$tmp_tokens['query_type'] = trim($match[1]);
|
|
$tmp_tokens['table_name'] = trim($match[2]);
|
|
$command_array = $this->split_multiple($command);
|
|
foreach ($command_array as $single_command) {
|
|
$command_tokens = $this->command_tokenizer($single_command);
|
|
if (!empty($command_tokens)) {
|
|
$tokens[] = array_merge($tmp_tokens, $command_tokens);
|
|
} else {
|
|
$this->_query = 'SELECT 1=1';
|
|
}
|
|
}
|
|
foreach ($tokens as $token) {
|
|
$command_name = $token['command'];
|
|
switch ($command_name) {
|
|
case 'add column': case 'rename to': case 'add index': case 'drop index':
|
|
$this->_query = $this->handle_single_command($token);
|
|
break;
|
|
case 'add primary key':
|
|
$this->_query = $this->handle_add_primary_key($token);
|
|
break;
|
|
case 'drop primary key':
|
|
$this->_query = $this->handle_drop_primary_key($token);
|
|
break;
|
|
case 'modify column':
|
|
$this->_query = $this->handle_modify_command($token);
|
|
break;
|
|
case 'change column':
|
|
$this->_query = $this->handle_change_command($token);
|
|
break;
|
|
case 'alter column':
|
|
$this->_query = $this->handle_alter_command($token);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
$this->_query = 'SELECT 1=1';
|
|
}
|
|
return $this->_query;
|
|
}
|
|
|
|
private function command_tokenizer($command) {
|
|
$tokens = array();
|
|
if (preg_match('/^(ADD|DROP|RENAME|MODIFY|CHANGE|ALTER)\\s*(\\w+)?\\s*(\\w+)?\\s*/ims', $command, $match)) {
|
|
$the_rest = str_ireplace($match[0], '', $command);
|
|
$match_1 = strtolower(trim($match[1]));
|
|
$match_2 = strtolower(trim($match[2]));
|
|
$match_3 = isset($match[3]) ? strtolower(trim($match[3])) : '';
|
|
switch ($match_1) {
|
|
case 'add':
|
|
if (in_array($match_2, array('fulltext', 'constraint', 'foreign'))) {
|
|
break;
|
|
} elseif ($match_2 == 'column') {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['column_name'] = $match_3;
|
|
$tokens['column_def'] = trim($the_rest);
|
|
} elseif ($match_2 == 'primary') {
|
|
$tokens['command'] = $match_1.' '.$match_2.' '.$match_3;
|
|
$tokens['column_name'] = $the_rest;
|
|
} elseif ($match_2 == 'unique') {
|
|
list($index_name, $col_name) = preg_split('/[\(\)]/s', trim($the_rest), -1, PREG_SPLIT_DELIM_CAPTURE);
|
|
$tokens['unique'] = true;
|
|
$tokens['command'] = $match_1.' '.$match_3;
|
|
$tokens['index_name'] = trim($index_name);
|
|
$tokens['column_name'] = '('.trim($col_name).')';
|
|
} elseif (in_array($match_2, array('index', 'key'))) {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
if ($match_3 == '') {
|
|
$tokens['index_name'] = str_replace(array('(', ')'), '', $the_rest);
|
|
} else {
|
|
$tokens['index_name'] = $match_3;
|
|
}
|
|
$tokens['column_name'] = trim($the_rest);
|
|
} else {
|
|
$tokens['command'] = $match_1.' column';
|
|
$tokens['column_name'] = $match_2;
|
|
$tokens['column_def'] = $match_3.' '.$the_rest;
|
|
}
|
|
break;
|
|
case 'drop':
|
|
if ($match_2 == 'column') {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['column_name'] = trim($match_3);
|
|
} elseif ($match_2 == 'primary') {
|
|
$tokens['command'] = $match_1.' '.$match_2.' '.$match_3;
|
|
} elseif (in_array($match_2, array('index', 'key'))) {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['index_name'] = $match_3;
|
|
} elseif ($match_2 == 'primary') {
|
|
$tokens['command'] = $match_1.' '.$match_2.' '.$match_3;
|
|
} else {
|
|
$tokens['command'] = $match_1.' column';
|
|
$tokens['column_name'] = $match_2;
|
|
}
|
|
break;
|
|
case 'rename':
|
|
if ($match_2 == 'to') {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['column_name'] = $match_3;
|
|
} else {
|
|
$tokens['command'] = $match_1.' to';
|
|
$tokens['column_name'] = $match_2;
|
|
}
|
|
break;
|
|
case 'modify':
|
|
if ($match_2 == 'column') {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['column_name'] = $match_3;
|
|
$tokens['column_def'] = trim($the_rest);
|
|
} else {
|
|
$tokens['command'] = $match_1.' column';
|
|
$tokens['column_name'] = $match_2;
|
|
$tokens['column_def'] = $match_3.' '.trim($the_rest);
|
|
}
|
|
break;
|
|
case 'change':
|
|
if ($match_2 == 'column') {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['old_column'] = $match_3;
|
|
list($new_col, $col_def) = explode(' ', trim($the_rest), 2);
|
|
$tokens['new_column'] = $new_col;
|
|
$tokens['column_def'] = trim($col_def);
|
|
} else {
|
|
$tokens['command'] = $match_1.' column';
|
|
$tokens['old_column'] = $match_2;
|
|
$tokens['new_column'] = $match_3;
|
|
$tokens['column_def'] = trim($the_rest);
|
|
}
|
|
break;
|
|
case 'alter':
|
|
if ($match_2 == 'column') {
|
|
$tokens['command'] = $match_1.' '.$match_2;
|
|
$tokens['column_name'] = $match_3;
|
|
list($set_or_drop) = explode(' ', $the_rest);
|
|
if ($set_or_drop == 'set') {
|
|
$tokens['default_command'] = 'set default';
|
|
$default_value = str_ireplace('set default', '', $the_rest);
|
|
$tokens['default_value'] = trim($default_value);
|
|
} else {
|
|
$tokens['default_command'] = 'drop default';
|
|
}
|
|
} else {
|
|
$tokens['command'] = $match_1.' column';
|
|
$tokens['column_name'] = $match_2;
|
|
if ($match_3 == 'set') {
|
|
$tokens['default_command'] = 'set default';
|
|
$default_value = str_ireplace('default', '', $the_rest);
|
|
$tokens['default_value'] = trim($default_value);
|
|
} else {
|
|
$tokens['default_command'] = 'drop default';
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return $tokens;
|
|
}
|
|
}
|
|
|
|
private function split_multiple($command) {
|
|
$out = true;
|
|
$command_array = array();
|
|
$command_string = '';
|
|
$tokens = preg_split('/\b/s', $command, -1, PREG_SPLIT_DELIM_CAPTURE);
|
|
foreach ($tokens as $token) {
|
|
switch (trim($token)) {
|
|
case ';':
|
|
break;
|
|
case '(':
|
|
$command_string .= $token;
|
|
$out = false;
|
|
break;
|
|
case ')':
|
|
$command_string .= $token;
|
|
$out = true;
|
|
break;
|
|
case '),':
|
|
$command_array[] = $command_string;
|
|
$command_string = '';
|
|
$out = true;
|
|
break;
|
|
case ',':
|
|
if ($out) {
|
|
$command_array[] = $command_string;
|
|
$command_string = '';
|
|
} else {
|
|
$command_string .= $token;
|
|
}
|
|
break;
|
|
default:
|
|
$command_string .= $token;
|
|
break;
|
|
}
|
|
}
|
|
if (!empty($command_string)) {
|
|
$command_array[] = $command_string;
|
|
}
|
|
return $command_array;
|
|
}
|
|
|
|
private function handle_single_command($queries) {
|
|
$tokenized_query = $queries;
|
|
if (stripos($tokenized_query['command'], 'add column') !== false) {
|
|
$column_def = $this->convert_field_types($tokenized_query['column_name'], $tokenized_query['column_def']);
|
|
$query = "ALTER TABLE {$tokenized_query['table_name']} ADD COLUMN {$tokenized_query['column_name']} $column_def";
|
|
} elseif (stripos($tokenized_query['command'], 'rename') !== false) {
|
|
$query = "ALTER TABLE {$tokenized_query['table_name']} RENAME TO {$tokenized_query['column_name']}";
|
|
} elseif (stripos($tokenized_query['command'], 'add index') !== false) {
|
|
$unique = isset($tokenized_query['unique']) ? 'UNIQUE' : '';
|
|
$query = "CREATE $unique INDEX IF NOT EXISTS {$tokenized_query['index_name']} ON {$tokenized_query['table_name']} {$tokenized_query['column_name']}";
|
|
} elseif (stripos($tokenized_query['command'], 'drop index') !== false) {
|
|
$query = "DROP INDEX IF EXISTS {$tokenized_query['index_name']}";
|
|
} else {
|
|
$query = 'SELECT 1=1';
|
|
}
|
|
return $query;
|
|
}
|
|
|
|
private function handle_add_primary_key($queries) {
|
|
$tokenized_query = $queries;
|
|
$tbl_name = $tokenized_query['table_name'];
|
|
$temp_table = 'temp_'.$tokenized_query['table_name'];
|
|
$_wpdb = new PDODB();
|
|
$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='$tbl_name'");
|
|
$_wpdb = null;
|
|
for ($i = 0; $i < count($query_obj); $i++) {
|
|
$index_queries[$i] = $query_obj[$i]->sql;
|
|
}
|
|
$table_query = array_shift($index_queries);
|
|
$table_query = str_replace($tokenized_query['table_name'], $temp_table, $table_query);
|
|
$table_query = rtrim($table_query, ')');
|
|
$table_query = ", PRIMARY KEY {$tokenized_query['column_name']}";
|
|
$query[] = $table_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 $query;
|
|
}
|
|
|
|
private function handle_drop_primary_key($queries) {
|
|
$tokenized_query = $queries;
|
|
$temp_table = 'temp_'.$tokenized_query['table_name'];
|
|
$_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;
|
|
}
|
|
$table_query = array_shift($index_queries);
|
|
$pattern1 = '/^\\s*PRIMARY\\s*KEY\\s*\(.*\)/im';
|
|
$pattern2 = '/^\\s*.*(PRIMARY\\s*KEY\\s*(:?AUTOINCREMENT|))\\s*(?!\()/im';
|
|
if (preg_match($pattern1, $table_query, $match)) {
|
|
$table_query = str_replace($match[0], '', $table_query);
|
|
} elseif (preg_match($pattern2, $table_query, $match)) {
|
|
$table_query = str_replace($match[1], '', $table_query);
|
|
}
|
|
$table_query = str_replace($tokenized_query['table_name'], $temp_table, $table_query);
|
|
$query[] = $table_query;
|
|
$query[] = "INSERT INTO $temp_table SELECT * FROM {$tokenized_query['table_name']}";
|
|
$query[] = "DROP TABLE IF EXISTS {$tokenized_query['table_name']}";
|
|
$query[] = "ALTER TABLE $temp_table RENAME TO {$tokenized_query['table_name']}";
|
|
foreach ($index_queries as $index) {
|
|
$query[] = $index;
|
|
}
|
|
return $query;
|
|
}
|
|
|
|
private function handle_modify_command($queries) {
|
|
$tokenized_query = $queries;
|
|
$temp_table = 'temp_'.$tokenized_query['table_name'];
|
|
$column_def = $this->convert_field_types($tokenized_query['column_name'], $tokenized_query['column_def']);
|
|
$_wpdb = new PDODB();
|
|
$query_obj = $_wpdb->get_results("SELECT sql FROM sqlite_master WHERE tbl_name='{$tokenized_query['table_name']}'");
|
|
$_wpdb = null;
|
|
for ($i =0; $i < count($query_obj); $i++) {
|
|
$index_queries[$i] = $query_obj[$i]->sql;
|
|
}
|
|
$create_query = array_shift($index_queries);
|
|
if (stripos($create_query, $tokenized_query['column_name']) === false) {
|
|
return 'SELECT 1=1';
|
|
} elseif (preg_match("/{$tokenized_query['column_name']}\\s*{$tokenized_query['column_def']}\\s*[,)]/i", $create_query)) {
|
|
return 'SELECT 1=1';
|
|
}
|
|
$create_query = preg_replace("/{$tokenized_query['table_name']}/i", $temp_table, $create_query);
|
|
if (preg_match("/\\b{$tokenized_query['column_name']}\\s*.*(?=,)/ims", $create_query)) {
|
|
$create_query = preg_replace("/\\b{$tokenized_query['column_name']}\\s*.*(?=,)/ims", "{$tokenized_query['column_name']} {$tokenized_query['column_def']}", $create_query);
|
|
} elseif (preg_match("/\\b{$tokenized_query['column_name']}\\s*.*(?=\))/ims", $create_query)) {
|
|
$create_query = preg_replace("/\\b{$tokenized_query['column_name']}\\s*.*(?=\))/ims", "{$tokenized_query['column_name']} {$tokenized_query['column_def']}", $create_query);
|
|
}
|
|
$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 $query;
|
|
}
|
|
|
|
private function handle_change_command($queries) {
|
|
$col_check = false;
|
|
$old_fields = '';
|
|
$new_fields = '';
|
|
$tokenized_query = $queries;
|
|
$temp_table = 'temp_'.$tokenized_query['table_name'];
|
|
$column_def = $this->convert_field_types($tokenized_query['new_column'], $tokenized_query['column_def']);
|
|
$_wpdb = new PDODB();
|
|
$col_obj = $_wpdb->get_results("SHOW COLUMNS FROM {$tokenized_query['table_name']}");
|
|
foreach ($col_obj as $col) {
|
|
if ($col->Field == $tokenized_query['old_column']) $col_check = true;
|
|
$old_fields .= $col->Field . ',';
|
|
}
|
|
if ($col_check == false) {
|
|
$_wpdb = null;
|
|
return 'SELECT 1=1';
|
|
}
|
|
$old_fields = rtrim($old_fields, ',');
|
|
$new_fields = str_replace($tokenized_query['old_column'], $tokenized_query['new_column'], $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, $match)) {
|
|
if ($column_def == trim($match[1])) {
|
|
return 'SELECT 1=1';
|
|
} else {
|
|
$create_query = preg_replace("/\\b{$tokenized_query['old_column']}\\s*.*?(?=,)/ims", "{$tokenized_query['new_column']} {$column_def}", $create_query);
|
|
}
|
|
} elseif (preg_match("/\\b{$tokenized_query['old_column']}\\s*(.+?)(?=\))/ims", $create_query, $match)) {
|
|
if ($column_def == trim($match[1])) {
|
|
return 'SELECT 1=1';
|
|
} else {
|
|
$create_query = preg_replace("/\\b{$tokenized_query['old_column']}\\s*.*?(?=\))/ims", "{$tokenized_query['new_column']} {$column_def}", $create_query);
|
|
}
|
|
}
|
|
$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 $query;
|
|
}
|
|
|
|
private function handle_alter_command($queries) {
|
|
$tokenized_query = $queries;
|
|
$temp_table = 'temp_'.$tokenized_query['table_name'];
|
|
if (stripos($tokenized_query['default_command'], 'set') !== false) {
|
|
$def_value = $this->convert_field_types($tokenized_query['column_name'], $tokenized_query['default_value']);
|
|
$def_value = 'DEFAULT '.$def_value;
|
|
} else {
|
|
$def_value = '';
|
|
}
|
|
$_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*.*?)\\s*(DEFAULT\\s*.*)[,)]/im", $create_query, $match)) {
|
|
$col_def = trim($match[1]);
|
|
$old_default = trim($match[2]);
|
|
$create_query = preg_replace("/($col_def)\\s*$old_default/im", "\\1 $def_value", $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;
|
|
}
|
|
/**
|
|
* Change the field definition to SQLite compatible data type.
|
|
* @param string $col_name
|
|
* @param string $col_def
|
|
* @return string
|
|
*/
|
|
private function convert_field_types($col_name, $col_def){
|
|
$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'
|
|
);
|
|
$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('`', '', $col_def);
|
|
foreach ($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;
|
|
}
|
|
}
|
|
?>
|