[GitHub/WoltLab/WCF.git] / wcfsetup / install / files / lib / system / database / editor / MySQLDatabaseEditor.class.php

<?php
namespace wcf\system\database\editor;
use wcf\system\database\util\PreparedStatementConditionBuilder;
use wcf\system\Regex;

/**
 * Database editor implementation for MySQL4.1 or higher.
 * 
 * @author	Marcel Werk
 * @copyright	2001-2019 WoltLab GmbH
 * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
 * @package	WoltLabSuite\Core\System\Database\Editor
 */
class MySQLDatabaseEditor extends DatabaseEditor {
	/**
	 * @inheritDoc
	 */
	public function getTableNames() {
		$existingTables = [];
		$sql = "SHOW TABLES FROM `".$this->dbObj->getDatabaseName()."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
		while ($row = $statement->fetchArray(\PDO::FETCH_NUM)) {
			$existingTables[] = $row[0];
		}
		return $existingTables;
	}
	
	/**
	 * @inheritDoc
	 */
	public function getColumns($tableName) {
		$columns = [];
		$regex = new Regex('([a-z]+)\((.+)\)( unsigned)?', Regex::CASE_INSENSITIVE);
		
		$sql = "SHOW COLUMNS FROM `".$tableName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
		while ($row = $statement->fetchArray()) {
			$regex->match($row['Type']);
			$typeMatches = $regex->getMatches();
			
			$type = $row['Type'];
			$length = '';
			$decimals = '';
			$enumValues = '';
			$unsigned = false;
			if (!empty($typeMatches)) {
				$type = $typeMatches[1];
				
				switch ($type) {
					case 'enum':
					case 'set':
						$enumValues = $typeMatches[2];
						break;
						
					case 'decimal':
					case 'double':
					case 'float':
						$pieces = explode(',', $typeMatches[2]);
						switch (count($pieces)) {
							case 1:
								$length = $pieces[0];
								break;
								
							case 2:
								list($length, $decimals) = $pieces;
								break;
						}
						
						break;
						
					default:
						if ($typeMatches[2] == (int)$typeMatches[2]) {
							$length = $typeMatches[2];
						}
						break;
				}
				
				if (isset($typeMatches[3])) {
					$unsigned = true;
				}
			}
			
			$columns[] = ['name' => $row['Field'], 'data' => [
				'type' => $type,
				'length' => $length,
				'notNull' => $row['Null'] == 'YES' ? false : true,
				'key' => ($row['Key'] == 'PRI') ? 'PRIMARY' : (($row['Key'] == 'UNI') ? 'UNIQUE' : ''),
				'default' => $row['Default'],
				'autoIncrement' => $row['Extra'] == 'auto_increment' ? true : false,
				'enumValues' => $enumValues,
				'decimals' => $decimals,
				'unsigned' => $unsigned
			]];
		}
		
		return $columns;
	}
	
	/**
	 * @inheritDoc
	 */
	public function getForeignKeys($tableName) {
		$sql = "SELECT	CONSTRAINT_NAME, DELETE_RULE, UPDATE_RULE
			FROM	INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
			WHERE	CONSTRAINT_SCHEMA = ?
				AND TABLE_NAME = ?";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute([
			$this->dbObj->getDatabaseName(),
			$tableName
		]);
		$referentialConstraints = $statement->fetchAll(\PDO::FETCH_ASSOC);
		
		$validActions = ['CASCADE', 'SET NULL', 'NO ACTION'];
		
		$foreignKeys = [];
		foreach ($referentialConstraints as $information) {
			$foreignKeys[$information['CONSTRAINT_NAME']] = [
				'columns' => [],
				'referencedColumns' => [],
				'ON DELETE' => in_array($information['DELETE_RULE'], $validActions) ? $information['DELETE_RULE'] : null,
				'ON UPDATE' => in_array($information['UPDATE_RULE'], $validActions) ? $information['UPDATE_RULE'] : null
			];
		}
		
		if (empty($foreignKeys)) {
			return [];
		}
		
		$conditionBuilder = new PreparedStatementConditionBuilder();
		$conditionBuilder->add('CONSTRAINT_NAME IN (?)', [array_keys($foreignKeys)]);
		$conditionBuilder->add('TABLE_SCHEMA = ?', [$this->dbObj->getDatabaseName()]);
		$conditionBuilder->add('TABLE_NAME = ?', [$tableName]);
		
		$sql = "SELECT	CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME
			FROM	INFORMATION_SCHEMA.KEY_COLUMN_USAGE
			" . $conditionBuilder;
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute($conditionBuilder->getParameters());
		$keyColumnUsage = $statement->fetchAll(\PDO::FETCH_ASSOC);
		
		foreach ($keyColumnUsage as $information) {
			$foreignKeys[$information['CONSTRAINT_NAME']]['columns'][] = $information['COLUMN_NAME'];
			$foreignKeys[$information['CONSTRAINT_NAME']]['referencedColumns'][] = $information['REFERENCED_COLUMN_NAME'];
			$foreignKeys[$information['CONSTRAINT_NAME']]['referencedTable'] = $information['REFERENCED_TABLE_NAME'];
		}
		
		foreach ($foreignKeys as $keyName => $keyData) {
			$foreignKeys[$keyName]['columns'] = array_unique($foreignKeys[$keyName]['columns']);
			$foreignKeys[$keyName]['referencedColumns'] = array_unique($foreignKeys[$keyName]['referencedColumns']);
		}
		
		return $foreignKeys;
	}
	
	/**
	 * @inheritDoc
	 */
	public function getIndexInformation($tableName) {
		$sql = "SHOW	INDEX
			FROM	`".$tableName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
		$indices = $statement->fetchAll(\PDO::FETCH_ASSOC);
		
		$indexInformation = [];
		foreach ($indices as $index) {
			if (!isset($indexInformation[$index['Key_name']])) {
				$type = null;
				if ($index['Index_type'] === 'FULLTEXT') {
					$type = 'FULLTEXT';
				}
				else if ($index['Key_name'] === 'PRIMARY') {
					$type = 'PRIMARY';
				}
				else if ($index['Non_unique'] == 0) {
					$type = 'UNIQUE';
				}
				
				$indexInformation[$index['Key_name']] = [
					'columns' => [$index['Column_name']],
					'type' => $type
				];
			}
			else {
				$indexInformation[$index['Key_name']]['columns'][] = $index['Column_name'];
			}
		}
		
		return $indexInformation;
	}
	
	/**
	 * @inheritDoc
	 */
	public function getIndices($tableName) {
		$indices = [];
		$sql = "SHOW INDEX FROM `".$tableName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
		while ($row = $statement->fetchArray()) {
			$indices[] = $row['Key_name'];
		}
		
		return array_unique($indices);
	}
	
	/**
	 * @inheritDoc
	 */
	public function createTable($tableName, $columns, $indices = []) {
		$columnDefinition = $indexDefinition = '';
		
		// build column definition
		foreach ($columns as $column) {
			if (!empty($columnDefinition)) $columnDefinition .= ',';
			$columnDefinition .= $this->buildColumnDefinition($column['name'], $column['data']);
		}
		
		// build index definition
		$hasFulltextIndex = false;
		foreach ($indices as $index) {
			if (!empty($indexDefinition)) $indexDefinition .= ',';
			$indexDefinition .= $this->buildIndexDefinition($index['name'], $index['data']);
			if ($index['data']['type'] == 'FULLTEXT') $hasFulltextIndex = true;
		}
		
		// create table
		$sql = "CREATE TABLE `".$tableName."` (
				".$columnDefinition."
				".(!empty($indexDefinition) ? ',' : '')."
				".$indexDefinition."
			) ENGINE=".($hasFulltextIndex ? 'MyISAM' : 'InnoDB')." DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function dropTable($tableName) {
		$sql = "DROP TABLE IF EXISTS `".$tableName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function addColumn($tableName, $columnName, $columnData) {
		$sql = "ALTER TABLE `".$tableName."` ADD COLUMN ".$this->buildColumnDefinition($columnName, $columnData);
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function alterColumn($tableName, $oldColumnName, $newColumnName, $newColumnData) {
		$sql = "ALTER TABLE `".$tableName."` CHANGE COLUMN `".$oldColumnName."` ".$this->buildColumnDefinition($newColumnName, $newColumnData);
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function alterColumns($tableName, $alterData) {
		$queries = "";
		foreach ($alterData as $columnName => $data) {
			switch ($data['action']) {
				case 'add':
					$queries .= "ADD COLUMN {$this->buildColumnDefinition($columnName, $data['data'])},";
					break;
					
				case 'alter':
					$queries .= "CHANGE COLUMN `{$columnName}` {$this->buildColumnDefinition($data['oldColumnName'], $data['data'])},";
					break;
					
				case 'drop':
					$queries .= "DROP COLUMN `{$columnName}`,";
					break;
			}
		}
		
		$this->dbObj->prepareStatement("ALTER TABLE `{$tableName}` " . rtrim($queries, ','))->execute();
	}

	/**
	 * @inheritDoc
	 */
	public function dropColumn($tableName, $columnName) {
		$sql = "ALTER TABLE `".$tableName."` DROP COLUMN `".$columnName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function addIndex($tableName, $indexName, $indexData) {
		$sql = "ALTER TABLE `".$tableName."` ADD ".$this->buildIndexDefinition($indexName, $indexData);
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function addForeignKey($tableName, $indexName, $indexData) {
		$sql = "ALTER TABLE `".$tableName."` ADD";
		
		// add index name
		if (!empty($indexName)) $sql .= " CONSTRAINT `".$indexName."`";
		
		// add columns
		$sql .= " FOREIGN KEY (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['columns']))."`)";
		
		// add referenced table name
		$sql .= " REFERENCES `".$indexData['referencedTable']."`";
		
		// add referenced columns
		$sql .= " (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['referencedColumns']))."`)";
		
		// add operation and action
		if (!empty($indexData['operation'])) $sql .= " ON ".$indexData['operation']." ".$indexData['action'];
		if (!empty($indexData['ON DELETE'])) $sql .= " ON DELETE ".$indexData['ON DELETE'];
		if (!empty($indexData['ON UPDATE'])) $sql .= " ON UPDATE ".$indexData['ON UPDATE'];
		
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function dropIndex($tableName, $indexName) {
		$sql = "ALTER TABLE `".$tableName."` DROP INDEX `".$indexName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function dropPrimaryKey($tableName) {
		$sql = "ALTER TABLE ".$tableName." DROP PRIMARY KEY";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * @inheritDoc
	 */
	public function dropForeignKey($tableName, $indexName) {
		$sql = "ALTER TABLE `".$tableName."` DROP FOREIGN KEY `".$indexName."`";
		$statement = $this->dbObj->prepareStatement($sql);
		$statement->execute();
	}
	
	/**
	 * Builds a column definition for execution in a create table or alter table statement.
	 * 
	 * @param	string		$columnName
	 * @param	array		$columnData
	 * @return	string
	 */
	protected function buildColumnDefinition($columnName, $columnData) {
		// column name
		$definition = "`".$columnName."`";
		// column type
		$definition .= " ".$columnData['type'];
		
		if (!empty($columnData['unsigned'])) {
			$definition .= ' UNSIGNED';
		}
		
		// column length and decimals
		if (!empty($columnData['length'])) {
			$definition .= "(".$columnData['length'].(!empty($columnData['decimals']) ? ",".$columnData['decimals'] : "").")";
		}
		// enum / set
		if ($columnData['type'] == 'enum' && !empty($columnData['values'])) {
			$definition .= "(".$columnData['values'].")";
		}
		// not null / null
		if (!empty($columnData['notNull'])) $definition .= " NOT NULL";
		// default
		if (isset($columnData['default']) && $columnData['default'] !== '') $definition .= " DEFAULT ".$columnData['default'];
		// auto_increment
		if (!empty($columnData['autoIncrement'])) $definition .= " AUTO_INCREMENT";
		// key
		if (!empty($columnData['key'])) $definition .= " ".$columnData['key']." KEY";
		
		return $definition;
	}
	
	/**
	 * Builds a index definition for execution in a create table or alter table statement.
	 * 
	 * @param	string		$indexName
	 * @param	array		$indexData
	 * @return	string
	 */
	protected function buildIndexDefinition($indexName, $indexData) {
		// index type
		if ($indexData['type'] == 'PRIMARY') $definition = "PRIMARY KEY";
		else if ($indexData['type'] == 'UNIQUE') $definition = "UNIQUE KEY";
		else if ($indexData['type'] == 'FULLTEXT') $definition = "FULLTEXT KEY";
		else $definition = "KEY";
		
		// index name
		if (!empty($indexName)) $definition .= " `".$indexName."`";
		// columns
		$definition .= " (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['columns']))."`)";
		
		return $definition;
	}
}
Commit	Line	Data
11ade432 AE	1	<?php
11ade432 AE	2	namespace wcf\system\database\editor;
770f5de3	3	use wcf\system\database\util\PreparedStatementConditionBuilder;
82a7de7f	4	use wcf\system\Regex;
11ade432 AE	5
11ade432 AE	6	/**
a17de04e MS	7	* Database editor implementation for MySQL4.1 or higher.
a17de04e MS	8	*
11ade432	9	* @author Marcel Werk
7b7b9764	10	* @copyright 2001-2019 WoltLab GmbH
11ade432	11	* @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
e71525e4	12	* @package WoltLabSuite\Core\System\Database\Editor
11ade432 AE	13	*/
	14	class MySQLDatabaseEditor extends DatabaseEditor {
	15	/**
0fcfe5f6	16	* @inheritDoc
11ade432 AE	17	*/
11ade432 AE	18	public function getTableNames() {
058cbd6a	19	$existingTables = [];
11ade432 AE	20	$sql = "SHOW TABLES FROM `".$this->dbObj->getDatabaseName()."`";
	21	$statement = $this->dbObj->prepareStatement($sql);
	22	$statement->execute();
	23	while ($row = $statement->fetchArray(\PDO::FETCH_NUM)) {
	24	$existingTables[] = $row[0];
	25	}
	26	return $existingTables;
	27	}
	28
	29	/**
0fcfe5f6	30	* @inheritDoc
11ade432 AE	31	*/
11ade432 AE	32	public function getColumns($tableName) {
058cbd6a	33	$columns = [];
f6e43f2f	34	$regex = new Regex('([a-z]+)\((.+)\)( unsigned)?', Regex::CASE_INSENSITIVE);
77bb36ca	35
4f2c4eb8	36	$sql = "SHOW COLUMNS FROM `".$tableName."`";
11ade432 AE	37	$statement = $this->dbObj->prepareStatement($sql);
	38	$statement->execute();
	39	while ($row = $statement->fetchArray()) {
14d48464	40	$regex->match($row['Type']);
14d48464	41	$typeMatches = $regex->getMatches();
77bb36ca	42
4d2bd2ec MS	43	$type = $row['Type'];
	44	$length = '';
	45	$decimals = '';
	46	$enumValues = '';
f6e43f2f	47	$unsigned = false;
4d2bd2ec MS	48	if (!empty($typeMatches)) {
	49	$type = $typeMatches[1];
	50
	51	switch ($type) {
	52	case 'enum':
	53	case 'set':
	54	$enumValues = $typeMatches[2];
	55	break;
	56
	57	case 'decimal':
	58	case 'double':
	59	case 'float':
	60	$pieces = explode(',', $typeMatches[2]);
	61	switch (count($pieces)) {
	62	case 1:
	63	$length = $pieces[0];
	64	break;
	65
	66	case 2:
	67	list($length, $decimals) = $pieces;
	68	break;
	69	}
	70
	71	break;
	72
	73	default:
	74	if ($typeMatches[2] == (int)$typeMatches[2]) {
	75	$length = $typeMatches[2];
	76	}
	77	break;
	78	}
f6e43f2f MS	79
	80	if (isset($typeMatches[3])) {
	81	$unsigned = true;
	82	}
4d2bd2ec MS	83	}
4d2bd2ec MS	84
058cbd6a	85	$columns[] = ['name' => $row['Field'], 'data' => [
4d2bd2ec MS	86	'type' => $type,
	87	'length' => $length,
	88	'notNull' => $row['Null'] == 'YES' ? false : true,
63b9817b	89	'key' => ($row['Key'] == 'PRI') ? 'PRIMARY' : (($row['Key'] == 'UNI') ? 'UNIQUE' : ''),
5fe135db	90	'default' => $row['Default'],
4d2bd2ec MS	91	'autoIncrement' => $row['Extra'] == 'auto_increment' ? true : false,
4d2bd2ec MS	92	'enumValues' => $enumValues,
f6e43f2f MS	93	'decimals' => $decimals,
f6e43f2f MS	94	'unsigned' => $unsigned
058cbd6a	95	]];
ebe8e825	96	}
bf27dc91	97
9f959ced	98	return $columns;
11ade432 AE	99	}
11ade432 AE	100
dc62342b MS	101	/**
	102	* @inheritDoc
	103	*/
	104	public function getForeignKeys($tableName) {
770f5de3 MS	105	$sql = "SELECT CONSTRAINT_NAME, DELETE_RULE, UPDATE_RULE
	106	FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
	107	WHERE CONSTRAINT_SCHEMA = ?
	108	AND TABLE_NAME = ?";
dc62342b MS	109	$statement = $this->dbObj->prepareStatement($sql);
	110	$statement->execute([
	111	$this->dbObj->getDatabaseName(),
	112	$tableName
	113	]);
770f5de3	114	$referentialConstraints = $statement->fetchAll(\PDO::FETCH_ASSOC);
dc62342b MS	115
	116	$validActions = ['CASCADE', 'SET NULL', 'NO ACTION'];
	117
	118	$foreignKeys = [];
770f5de3 MS	119	foreach ($referentialConstraints as $information) {
	120	$foreignKeys[$information['CONSTRAINT_NAME']] = [
	121	'columns' => [],
	122	'referencedColumns' => [],
	123	'ON DELETE' => in_array($information['DELETE_RULE'], $validActions) ? $information['DELETE_RULE'] : null,
	124	'ON UPDATE' => in_array($information['UPDATE_RULE'], $validActions) ? $information['UPDATE_RULE'] : null
	125	];
	126	}
	127
	128	if (empty($foreignKeys)) {
	129	return [];
	130	}
	131
	132	$conditionBuilder = new PreparedStatementConditionBuilder();
	133	$conditionBuilder->add('CONSTRAINT_NAME IN (?)', [array_keys($foreignKeys)]);
	134	$conditionBuilder->add('TABLE_SCHEMA = ?', [$this->dbObj->getDatabaseName()]);
	135	$conditionBuilder->add('TABLE_NAME = ?', [$tableName]);
	136
	137	$sql = "SELECT CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME
	138	FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
	139	" . $conditionBuilder;
	140	$statement = $this->dbObj->prepareStatement($sql);
	141	$statement->execute($conditionBuilder->getParameters());
	142	$keyColumnUsage = $statement->fetchAll(\PDO::FETCH_ASSOC);
	143
	144	foreach ($keyColumnUsage as $information) {
	145	$foreignKeys[$information['CONSTRAINT_NAME']]['columns'][] = $information['COLUMN_NAME'];
	146	$foreignKeys[$information['CONSTRAINT_NAME']]['referencedColumns'][] = $information['REFERENCED_COLUMN_NAME'];
	147	$foreignKeys[$information['CONSTRAINT_NAME']]['referencedTable'] = $information['REFERENCED_TABLE_NAME'];
dc62342b MS	148	}
	149
	150	foreach ($foreignKeys as $keyName => $keyData) {
	151	$foreignKeys[$keyName]['columns'] = array_unique($foreignKeys[$keyName]['columns']);
	152	$foreignKeys[$keyName]['referencedColumns'] = array_unique($foreignKeys[$keyName]['referencedColumns']);
	153	}
	154
	155	return $foreignKeys;
	156	}
	157
	158	/**
	159	* @inheritDoc
	160	*/
	161	public function getIndexInformation($tableName) {
	162	$sql = "SHOW INDEX
	163	FROM `".$tableName."`";
	164	$statement = $this->dbObj->prepareStatement($sql);
	165	$statement->execute();
	166	$indices = $statement->fetchAll(\PDO::FETCH_ASSOC);
	167
	168	$indexInformation = [];
	169	foreach ($indices as $index) {
	170	if (!isset($indexInformation[$index['Key_name']])) {
	171	$type = null;
	172	if ($index['Index_type'] === 'FULLTEXT') {
	173	$type = 'FULLTEXT';
	174	}
	175	else if ($index['Key_name'] === 'PRIMARY') {
	176	$type = 'PRIMARY';
	177	}
	178	else if ($index['Non_unique'] == 0) {
	179	$type = 'UNIQUE';
	180	}
	181
	182	$indexInformation[$index['Key_name']] = [
	183	'columns' => [$index['Column_name']],
	184	'type' => $type
	185	];
	186	}
	187	else {
	188	$indexInformation[$index['Key_name']]['columns'][] = $index['Column_name'];
	189	}
	190	}
	191
	192	return $indexInformation;
	193	}
	194
11ade432	195	/**
0fcfe5f6	196	* @inheritDoc
11ade432 AE	197	*/
11ade432 AE	198	public function getIndices($tableName) {
058cbd6a	199	$indices = [];
4f2c4eb8	200	$sql = "SHOW INDEX FROM `".$tableName."`";
11ade432 AE	201	$statement = $this->dbObj->prepareStatement($sql);
	202	$statement->execute();
	203	while ($row = $statement->fetchArray()) {
9f959ced MS	204	$indices[] = $row['Key_name'];
	205	}
	206
f62c045d	207	return array_unique($indices);
11ade432 AE	208	}
	209
	210	/**
0fcfe5f6	211	* @inheritDoc
11ade432	212	*/
058cbd6a	213	public function createTable($tableName, $columns, $indices = []) {
11ade432 AE	214	$columnDefinition = $indexDefinition = '';
	215
	216	// build column definition
	217	foreach ($columns as $column) {
	218	if (!empty($columnDefinition)) $columnDefinition .= ',';
	219	$columnDefinition .= $this->buildColumnDefinition($column['name'], $column['data']);
	220	}
	221
	222	// build index definition
	223	$hasFulltextIndex = false;
	224	foreach ($indices as $index) {
	225	if (!empty($indexDefinition)) $indexDefinition .= ',';
	226	$indexDefinition .= $this->buildIndexDefinition($index['name'], $index['data']);
	227	if ($index['data']['type'] == 'FULLTEXT') $hasFulltextIndex = true;
	228	}
	229
	230	// create table
4f2c4eb8	231	$sql = "CREATE TABLE `".$tableName."` (
11ade432 AE	232	".$columnDefinition."
	233	".(!empty($indexDefinition) ? ',' : '')."
	234	".$indexDefinition."
ac677ff6	235	) ENGINE=".($hasFulltextIndex ? 'MyISAM' : 'InnoDB')." DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
11ade432 AE	236	$statement = $this->dbObj->prepareStatement($sql);
	237	$statement->execute();
	238	}
	239
	240	/**
0fcfe5f6	241	* @inheritDoc
11ade432 AE	242	*/
11ade432 AE	243	public function dropTable($tableName) {
4f2c4eb8	244	$sql = "DROP TABLE IF EXISTS `".$tableName."`";
11ade432 AE	245	$statement = $this->dbObj->prepareStatement($sql);
	246	$statement->execute();
	247	}
	248
	249	/**
0fcfe5f6	250	* @inheritDoc
11ade432 AE	251	*/
11ade432 AE	252	public function addColumn($tableName, $columnName, $columnData) {
4f2c4eb8	253	$sql = "ALTER TABLE `".$tableName."` ADD COLUMN ".$this->buildColumnDefinition($columnName, $columnData);
11ade432 AE	254	$statement = $this->dbObj->prepareStatement($sql);
	255	$statement->execute();
	256	}
	257
	258	/**
0fcfe5f6	259	* @inheritDoc
11ade432 AE	260	*/
11ade432 AE	261	public function alterColumn($tableName, $oldColumnName, $newColumnName, $newColumnData) {
4f2c4eb8	262	$sql = "ALTER TABLE `".$tableName."` CHANGE COLUMN `".$oldColumnName."` ".$this->buildColumnDefinition($newColumnName, $newColumnData);
11ade432 AE	263	$statement = $this->dbObj->prepareStatement($sql);
	264	$statement->execute();
	265	}
	266
f6e43f2f MS	267	/**
	268	* @inheritDoc
	269	*/
	270	public function alterColumns($tableName, $alterData) {
	271	$queries = "";
	272	foreach ($alterData as $columnName => $data) {
	273	switch ($data['action']) {
	274	case 'add':
	275	$queries .= "ADD COLUMN {$this->buildColumnDefinition($columnName, $data['data'])},";
	276	break;
	277
	278	case 'alter':
	279	$queries .= "CHANGE COLUMN `{$columnName}` {$this->buildColumnDefinition($data['oldColumnName'], $data['data'])},";
	280	break;
	281
	282	case 'drop':
	283	$queries .= "DROP COLUMN `{$columnName}`,";
	284	break;
	285	}
	286	}
	287
	288	$this->dbObj->prepareStatement("ALTER TABLE `{$tableName}` " . rtrim($queries, ','))->execute();
	289	}
	290
11ade432	291	/**
0fcfe5f6	292	* @inheritDoc
11ade432 AE	293	*/
11ade432 AE	294	public function dropColumn($tableName, $columnName) {
4f2c4eb8	295	$sql = "ALTER TABLE `".$tableName."` DROP COLUMN `".$columnName."`";
11ade432 AE	296	$statement = $this->dbObj->prepareStatement($sql);
	297	$statement->execute();
	298	}
	299
	300	/**
0fcfe5f6	301	* @inheritDoc
11ade432 AE	302	*/
11ade432 AE	303	public function addIndex($tableName, $indexName, $indexData) {
4f2c4eb8	304	$sql = "ALTER TABLE `".$tableName."` ADD ".$this->buildIndexDefinition($indexName, $indexData);
11ade432 AE	305	$statement = $this->dbObj->prepareStatement($sql);
	306	$statement->execute();
	307	}
	308
	309	/**
0fcfe5f6	310	* @inheritDoc
11ade432 AE	311	*/
11ade432 AE	312	public function addForeignKey($tableName, $indexName, $indexData) {
4f2c4eb8	313	$sql = "ALTER TABLE `".$tableName."` ADD";
11ade432 AE	314
11ade432 AE	315	// add index name
96017679	316	if (!empty($indexName)) $sql .= " CONSTRAINT `".$indexName."`";
11ade432 AE	317
11ade432 AE	318	// add columns
4f2c4eb8	319	$sql .= " FOREIGN KEY (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['columns']))."`)";
11ade432 AE	320
11ade432 AE	321	// add referenced table name
4f2c4eb8	322	$sql .= " REFERENCES `".$indexData['referencedTable']."`";
11ade432 AE	323
11ade432 AE	324	// add referenced columns
4f2c4eb8	325	$sql .= " (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['referencedColumns']))."`)";
11ade432 AE	326
	327	// add operation and action
	328	if (!empty($indexData['operation'])) $sql .= " ON ".$indexData['operation']." ".$indexData['action'];
281ac362 TD	329	if (!empty($indexData['ON DELETE'])) $sql .= " ON DELETE ".$indexData['ON DELETE'];
281ac362 TD	330	if (!empty($indexData['ON UPDATE'])) $sql .= " ON UPDATE ".$indexData['ON UPDATE'];
11ade432 AE	331
	332	$statement = $this->dbObj->prepareStatement($sql);
	333	$statement->execute();
	334	}
	335
	336	/**
0fcfe5f6	337	* @inheritDoc
11ade432 AE	338	*/
11ade432 AE	339	public function dropIndex($tableName, $indexName) {
4f2c4eb8	340	$sql = "ALTER TABLE `".$tableName."` DROP INDEX `".$indexName."`";
11ade432 AE	341	$statement = $this->dbObj->prepareStatement($sql);
	342	$statement->execute();
	343	}
	344
42a1e71f	345	/**
6b7d6653	346	* @inheritDoc
42a1e71f	347	*/
	348	public function dropPrimaryKey($tableName) {
	349	$sql = "ALTER TABLE ".$tableName." DROP PRIMARY KEY";
	350	$statement = $this->dbObj->prepareStatement($sql);
	351	$statement->execute();
	352	}
	353
b6ae7d04	354	/**
0fcfe5f6	355	* @inheritDoc
b6ae7d04 MW	356	*/
b6ae7d04 MW	357	public function dropForeignKey($tableName, $indexName) {
4f2c4eb8	358	$sql = "ALTER TABLE `".$tableName."` DROP FOREIGN KEY `".$indexName."`";
b6ae7d04 MW	359	$statement = $this->dbObj->prepareStatement($sql);
	360	$statement->execute();
	361	}
	362
11ade432 AE	363	/**
	364	* Builds a column definition for execution in a create table or alter table statement.
	365	*
	366	* @param string $columnName
	367	* @param array $columnData
71952a87	368	* @return string
11ade432 AE	369	*/
	370	protected function buildColumnDefinition($columnName, $columnData) {
	371	// column name
4f2c4eb8	372	$definition = "`".$columnName."`";
11ade432 AE	373	// column type
11ade432 AE	374	$definition .= " ".$columnData['type'];
f6e43f2f MS	375
	376	if (!empty($columnData['unsigned'])) {
	377	$definition .= ' UNSIGNED';
	378	}
	379
11ade432 AE	380	// column length and decimals
	381	if (!empty($columnData['length'])) {
	382	$definition .= "(".$columnData['length'].(!empty($columnData['decimals']) ? ",".$columnData['decimals'] : "").")";
	383	}
	384	// enum / set
	385	if ($columnData['type'] == 'enum' && !empty($columnData['values'])) {
	386	$definition .= "(".$columnData['values'].")";
	387	}
	388	// not null / null
	389	if (!empty($columnData['notNull'])) $definition .= " NOT NULL";
	390	// default
	391	if (isset($columnData['default']) && $columnData['default'] !== '') $definition .= " DEFAULT ".$columnData['default'];
	392	// auto_increment
	393	if (!empty($columnData['autoIncrement'])) $definition .= " AUTO_INCREMENT";
	394	// key
	395	if (!empty($columnData['key'])) $definition .= " ".$columnData['key']." KEY";
	396
	397	return $definition;
	398	}
	399
	400	/**
	401	* Builds a index definition for execution in a create table or alter table statement.
	402	*
	403	* @param string $indexName
	404	* @param array $indexData
71952a87	405	* @return string
11ade432 AE	406	*/
11ade432 AE	407	protected function buildIndexDefinition($indexName, $indexData) {
11ade432 AE	408	// index type
	409	if ($indexData['type'] == 'PRIMARY') $definition = "PRIMARY KEY";
	410	else if ($indexData['type'] == 'UNIQUE') $definition = "UNIQUE KEY";
	411	else if ($indexData['type'] == 'FULLTEXT') $definition = "FULLTEXT KEY";
	412	else $definition = "KEY";
	413
	414	// index name
4f2c4eb8	415	if (!empty($indexName)) $definition .= " `".$indexName."`";
11ade432	416	// columns
4f2c4eb8	417	$definition .= " (`".str_replace(',', '`,`', preg_replace('/\s+/', '', $indexData['columns']))."`)";
11ade432 AE	418
	419	return $definition;
	420	}
	421	}