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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Database\Driver\mysql\Schema. | |
| */ | |
| namespace Drupal\Core\Database\Driver\mysql; | |
| use Drupal\Core\Database\Query\Condition; | |
| use Drupal\Core\Database\SchemaException; | |
| use Drupal\Core\Database\SchemaObjectExistsException; | |
| use Drupal\Core\Database\SchemaObjectDoesNotExistException; | |
| use Drupal\Core\Database\Schema as DatabaseSchema; | |
| use Drupal\Component\Utility\Unicode; | |
| /** | |
| * @addtogroup schemaapi | |
| * @{ | |
| */ | |
| /** | |
| * MySQL implementation of \Drupal\Core\Database\Schema. | |
| */ | |
| class Schema extends DatabaseSchema { | |
| /** | |
| * Maximum length of a table comment in MySQL. | |
| */ | |
| const COMMENT_MAX_TABLE = 60; | |
| /** | |
| * Maximum length of a column comment in MySQL. | |
| */ | |
| const COMMENT_MAX_COLUMN = 255; | |
| /** | |
| * @var array | |
| * List of MySQL string types. | |
| */ | |
| protected $mysqlStringTypes = array( | |
| 'VARCHAR', | |
| 'CHAR', | |
| 'TINYTEXT', | |
| 'MEDIUMTEXT', | |
| 'LONGTEXT', | |
| 'TEXT', | |
| ); | |
| /** | |
| * Get information about the table and database name from the prefix. | |
| * | |
| * @return | |
| * A keyed array with information about the database, table name and prefix. | |
| */ | |
| protected function getPrefixInfo($table = 'default', $add_prefix = TRUE) { | |
| $info = array('prefix' => $this->connection->tablePrefix($table)); | |
| if ($add_prefix) { | |
| $table = $info['prefix'] . $table; | |
| } | |
| if (($pos = strpos($table, '.')) !== FALSE) { | |
| $info['database'] = substr($table, 0, $pos); | |
| $info['table'] = substr($table, ++$pos); | |
| } | |
| else { | |
| $info['database'] = $this->connection->getConnectionOptions()['database']; | |
| $info['table'] = $table; | |
| } | |
| return $info; | |
| } | |
| /** | |
| * Build a condition to match a table name against a standard information_schema. | |
| * | |
| * MySQL uses databases like schemas rather than catalogs so when we build | |
| * a condition to query the information_schema.tables, we set the default | |
| * database as the schema unless specified otherwise, and exclude table_catalog | |
| * from the condition criteria. | |
| */ | |
| protected function buildTableNameCondition($table_name, $operator = '=', $add_prefix = TRUE) { | |
| $table_info = $this->getPrefixInfo($table_name, $add_prefix); | |
| $condition = new Condition('AND'); | |
| $condition->condition('table_schema', $table_info['database']); | |
| $condition->condition('table_name', $table_info['table'], $operator); | |
| return $condition; | |
| } | |
| /** | |
| * Generate SQL to create a new table from a Drupal schema definition. | |
| * | |
| * @param $name | |
| * The name of the table to create. | |
| * @param $table | |
| * A Schema API table definition array. | |
| * @return | |
| * An array of SQL statements to create the table. | |
| */ | |
| protected function createTableSql($name, $table) { | |
| $info = $this->connection->getConnectionOptions(); | |
| // Provide defaults if needed. | |
| $table += array( | |
| 'mysql_engine' => 'InnoDB', | |
| 'mysql_character_set' => 'utf8mb4', | |
| ); | |
| $sql = "CREATE TABLE {" . $name . "} (\n"; | |
| // Add the SQL statement for each field. | |
| foreach ($table['fields'] as $field_name => $field) { | |
| $sql .= $this->createFieldSql($field_name, $this->processField($field)) . ", \n"; | |
| } | |
| // Process keys & indexes. | |
| $keys = $this->createKeysSql($table); | |
| if (count($keys)) { | |
| $sql .= implode(", \n", $keys) . ", \n"; | |
| } | |
| // Remove the last comma and space. | |
| $sql = substr($sql, 0, -3) . "\n) "; | |
| $sql .= 'ENGINE = ' . $table['mysql_engine'] . ' DEFAULT CHARACTER SET ' . $table['mysql_character_set']; | |
| // By default, MySQL uses the default collation for new tables, which is | |
| // 'utf8mb4_general_ci' for utf8mb4. If an alternate collation has been | |
| // set, it needs to be explicitly specified. | |
| // @see DatabaseConnection_mysql | |
| if (!empty($info['collation'])) { | |
| $sql .= ' COLLATE ' . $info['collation']; | |
| } | |
| // Add table comment. | |
| if (!empty($table['description'])) { | |
| $sql .= ' COMMENT ' . $this->prepareComment($table['description'], self::COMMENT_MAX_TABLE); | |
| } | |
| return array($sql); | |
| } | |
| /** | |
| * Create an SQL string for a field to be used in table creation or alteration. | |
| * | |
| * Before passing a field out of a schema definition into this function it has | |
| * to be processed by _db_process_field(). | |
| * | |
| * @param string $name | |
| * Name of the field. | |
| * @param array $spec | |
| * The field specification, as per the schema data structure format. | |
| */ | |
| protected function createFieldSql($name, $spec) { | |
| $sql = "`" . $name . "` " . $spec['mysql_type']; | |
| if (in_array($spec['mysql_type'], $this->mysqlStringTypes)) { | |
| if (isset($spec['length'])) { | |
| $sql .= '(' . $spec['length'] . ')'; | |
| } | |
| if (!empty($spec['binary'])) { | |
| $sql .= ' BINARY'; | |
| } | |
| // Note we check for the "type" key here. "mysql_type" is VARCHAR: | |
| if (isset($spec['type']) && $spec['type'] == 'varchar_ascii') { | |
| $sql .= ' CHARACTER SET ascii COLLATE ascii_general_ci'; | |
| } | |
| } | |
| elseif (isset($spec['precision']) && isset($spec['scale'])) { | |
| $sql .= '(' . $spec['precision'] . ', ' . $spec['scale'] . ')'; | |
| } | |
| if (!empty($spec['unsigned'])) { | |
| $sql .= ' unsigned'; | |
| } | |
| if (isset($spec['not null'])) { | |
| if ($spec['not null']) { | |
| $sql .= ' NOT NULL'; | |
| } | |
| else { | |
| $sql .= ' NULL'; | |
| } | |
| } | |
| if (!empty($spec['auto_increment'])) { | |
| $sql .= ' auto_increment'; | |
| } | |
| // $spec['default'] can be NULL, so we explicitly check for the key here. | |
| if (array_key_exists('default', $spec)) { | |
| $sql .= ' DEFAULT ' . $this->escapeDefaultValue($spec['default']); | |
| } | |
| if (empty($spec['not null']) && !isset($spec['default'])) { | |
| $sql .= ' DEFAULT NULL'; | |
| } | |
| // Add column comment. | |
| if (!empty($spec['description'])) { | |
| $sql .= ' COMMENT ' . $this->prepareComment($spec['description'], self::COMMENT_MAX_COLUMN); | |
| } | |
| return $sql; | |
| } | |
| /** | |
| * Set database-engine specific properties for a field. | |
| * | |
| * @param $field | |
| * A field description array, as specified in the schema documentation. | |
| */ | |
| protected function processField($field) { | |
| if (!isset($field['size'])) { | |
| $field['size'] = 'normal'; | |
| } | |
| // Set the correct database-engine specific datatype. | |
| // In case one is already provided, force it to uppercase. | |
| if (isset($field['mysql_type'])) { | |
| $field['mysql_type'] = Unicode::strtoupper($field['mysql_type']); | |
| } | |
| else { | |
| $map = $this->getFieldTypeMap(); | |
| $field['mysql_type'] = $map[$field['type'] . ':' . $field['size']]; | |
| } | |
| if (isset($field['type']) && $field['type'] == 'serial') { | |
| $field['auto_increment'] = TRUE; | |
| } | |
| return $field; | |
| } | |
| public function getFieldTypeMap() { | |
| // Put :normal last so it gets preserved by array_flip. This makes | |
| // it much easier for modules (such as schema.module) to map | |
| // database types back into schema types. | |
| // $map does not use drupal_static as its value never changes. | |
| static $map = array( | |
| 'varchar_ascii:normal' => 'VARCHAR', | |
| 'varchar:normal' => 'VARCHAR', | |
| 'char:normal' => 'CHAR', | |
| 'text:tiny' => 'TINYTEXT', | |
| 'text:small' => 'TINYTEXT', | |
| 'text:medium' => 'MEDIUMTEXT', | |
| 'text:big' => 'LONGTEXT', | |
| 'text:normal' => 'TEXT', | |
| 'serial:tiny' => 'TINYINT', | |
| 'serial:small' => 'SMALLINT', | |
| 'serial:medium' => 'MEDIUMINT', | |
| 'serial:big' => 'BIGINT', | |
| 'serial:normal' => 'INT', | |
| 'int:tiny' => 'TINYINT', | |
| 'int:small' => 'SMALLINT', | |
| 'int:medium' => 'MEDIUMINT', | |
| 'int:big' => 'BIGINT', | |
| 'int:normal' => 'INT', | |
| 'float:tiny' => 'FLOAT', | |
| 'float:small' => 'FLOAT', | |
| 'float:medium' => 'FLOAT', | |
| 'float:big' => 'DOUBLE', | |
| 'float:normal' => 'FLOAT', | |
| 'numeric:normal' => 'DECIMAL', | |
| 'blob:big' => 'LONGBLOB', | |
| 'blob:normal' => 'BLOB', | |
| ); | |
| return $map; | |
| } | |
| protected function createKeysSql($spec) { | |
| $keys = array(); | |
| if (!empty($spec['primary key'])) { | |
| $keys[] = 'PRIMARY KEY (' . $this->createKeySql($spec['primary key']) . ')'; | |
| } | |
| if (!empty($spec['unique keys'])) { | |
| foreach ($spec['unique keys'] as $key => $fields) { | |
| $keys[] = 'UNIQUE KEY `' . $key . '` (' . $this->createKeySql($fields) . ')'; | |
| } | |
| } | |
| if (!empty($spec['indexes'])) { | |
| $indexes = $this->getNormalizedIndexes($spec); | |
| foreach ($indexes as $index => $fields) { | |
| $keys[] = 'INDEX `' . $index . '` (' . $this->createKeySql($fields) . ')'; | |
| } | |
| } | |
| return $keys; | |
| } | |
| /** | |
| * Gets normalized indexes from a table specification. | |
| * | |
| * Shortens indexes to 191 characters if they apply to utf8mb4-encoded | |
| * fields, in order to comply with the InnoDB index limitation of 756 bytes. | |
| * | |
| * @param array $spec | |
| * The table specification. | |
| * | |
| * @return array | |
| * List of shortened indexes. | |
| * | |
| * @throws \Drupal\Core\Database\SchemaException | |
| * Thrown if field specification is missing. | |
| */ | |
| protected function getNormalizedIndexes(array $spec) { | |
| $indexes = isset($spec['indexes']) ? $spec['indexes'] : []; | |
| foreach ($indexes as $index_name => $index_fields) { | |
| foreach ($index_fields as $index_key => $index_field) { | |
| // Get the name of the field from the index specification. | |
| $field_name = is_array($index_field) ? $index_field[0] : $index_field; | |
| // Check whether the field is defined in the table specification. | |
| if (isset($spec['fields'][$field_name])) { | |
| // Get the MySQL type from the processed field. | |
| $mysql_field = $this->processField($spec['fields'][$field_name]); | |
| if (in_array($mysql_field['mysql_type'], $this->mysqlStringTypes)) { | |
| // Check whether we need to shorten the index. | |
| if ((!isset($mysql_field['type']) || $mysql_field['type'] != 'varchar_ascii') && (!isset($mysql_field['length']) || $mysql_field['length'] > 191)) { | |
| // Limit the index length to 191 characters. | |
| $this->shortenIndex($indexes[$index_name][$index_key]); | |
| } | |
| } | |
| } | |
| else { | |
| throw new SchemaException("MySQL needs the '$field_name' field specification in order to normalize the '$index_name' index"); | |
| } | |
| } | |
| } | |
| return $indexes; | |
| } | |
| /** | |
| * Helper function for normalizeIndexes(). | |
| * | |
| * Shortens an index to 191 characters. | |
| * | |
| * @param array $index | |
| * The index array to be used in createKeySql. | |
| * | |
| * @see Drupal\Core\Database\Driver\mysql\Schema::createKeySql() | |
| * @see Drupal\Core\Database\Driver\mysql\Schema::normalizeIndexes() | |
| */ | |
| protected function shortenIndex(&$index) { | |
| if (is_array($index)) { | |
| if ($index[1] > 191) { | |
| $index[1] = 191; | |
| } | |
| } | |
| else { | |
| $index = array($index, 191); | |
| } | |
| } | |
| protected function createKeySql($fields) { | |
| $return = array(); | |
| foreach ($fields as $field) { | |
| if (is_array($field)) { | |
| $return[] = '`' . $field[0] . '`(' . $field[1] . ')'; | |
| } | |
| else { | |
| $return[] = '`' . $field . '`'; | |
| } | |
| } | |
| return implode(', ', $return); | |
| } | |
| public function renameTable($table, $new_name) { | |
| if (!$this->tableExists($table)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", array('@table' => $table, '@table_new' => $new_name))); | |
| } | |
| if ($this->tableExists($new_name)) { | |
| throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", array('@table' => $table, '@table_new' => $new_name))); | |
| } | |
| $info = $this->getPrefixInfo($new_name); | |
| return $this->connection->query('ALTER TABLE {' . $table . '} RENAME TO `' . $info['table'] . '`'); | |
| } | |
| public function dropTable($table) { | |
| if (!$this->tableExists($table)) { | |
| return FALSE; | |
| } | |
| $this->connection->query('DROP TABLE {' . $table . '}'); | |
| return TRUE; | |
| } | |
| public function addField($table, $field, $spec, $keys_new = array()) { | |
| if (!$this->tableExists($table)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", array('@field' => $field, '@table' => $table))); | |
| } | |
| if ($this->fieldExists($table, $field)) { | |
| throw new SchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", array('@field' => $field, '@table' => $table))); | |
| } | |
| $fixnull = FALSE; | |
| if (!empty($spec['not null']) && !isset($spec['default'])) { | |
| $fixnull = TRUE; | |
| $spec['not null'] = FALSE; | |
| } | |
| $query = 'ALTER TABLE {' . $table . '} ADD '; | |
| $query .= $this->createFieldSql($field, $this->processField($spec)); | |
| if ($keys_sql = $this->createKeysSql($keys_new)) { | |
| $query .= ', ADD ' . implode(', ADD ', $keys_sql); | |
| } | |
| $this->connection->query($query); | |
| if (isset($spec['initial'])) { | |
| $this->connection->update($table) | |
| ->fields(array($field => $spec['initial'])) | |
| ->execute(); | |
| } | |
| if ($fixnull) { | |
| $spec['not null'] = TRUE; | |
| $this->changeField($table, $field, $field, $spec); | |
| } | |
| } | |
| public function dropField($table, $field) { | |
| if (!$this->fieldExists($table, $field)) { | |
| return FALSE; | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} DROP `' . $field . '`'); | |
| return TRUE; | |
| } | |
| public function fieldSetDefault($table, $field, $default) { | |
| if (!$this->fieldExists($table, $field)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field))); | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` SET DEFAULT ' . $this->escapeDefaultValue($default)); | |
| } | |
| public function fieldSetNoDefault($table, $field) { | |
| if (!$this->fieldExists($table, $field)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot remove default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field))); | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` DROP DEFAULT'); | |
| } | |
| public function indexExists($table, $name) { | |
| // Returns one row for each column in the index. Result is string or FALSE. | |
| // Details at http://dev.mysql.com/doc/refman/5.0/en/show-index.html | |
| $row = $this->connection->query('SHOW INDEX FROM {' . $table . '} WHERE key_name = ' . $this->connection->quote($name))->fetchAssoc(); | |
| return isset($row['Key_name']); | |
| } | |
| public function addPrimaryKey($table, $fields) { | |
| if (!$this->tableExists($table)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", array('@table' => $table))); | |
| } | |
| if ($this->indexExists($table, 'PRIMARY')) { | |
| throw new SchemaObjectExistsException(t("Cannot add primary key to table @table: primary key already exists.", array('@table' => $table))); | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} ADD PRIMARY KEY (' . $this->createKeySql($fields) . ')'); | |
| } | |
| public function dropPrimaryKey($table) { | |
| if (!$this->indexExists($table, 'PRIMARY')) { | |
| return FALSE; | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} DROP PRIMARY KEY'); | |
| return TRUE; | |
| } | |
| public function addUniqueKey($table, $name, $fields) { | |
| if (!$this->tableExists($table)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name))); | |
| } | |
| if ($this->indexExists($table, $name)) { | |
| throw new SchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name))); | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} ADD UNIQUE KEY `' . $name . '` (' . $this->createKeySql($fields) . ')'); | |
| } | |
| public function dropUniqueKey($table, $name) { | |
| if (!$this->indexExists($table, $name)) { | |
| return FALSE; | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} DROP KEY `' . $name . '`'); | |
| return TRUE; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function addIndex($table, $name, $fields, array $spec) { | |
| if (!$this->tableExists($table)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name))); | |
| } | |
| if ($this->indexExists($table, $name)) { | |
| throw new SchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", array('@table' => $table, '@name' => $name))); | |
| } | |
| $spec['indexes'][$name] = $fields; | |
| $indexes = $this->getNormalizedIndexes($spec); | |
| $this->connection->query('ALTER TABLE {' . $table . '} ADD INDEX `' . $name . '` (' . $this->createKeySql($indexes[$name]) . ')'); | |
| } | |
| public function dropIndex($table, $name) { | |
| if (!$this->indexExists($table, $name)) { | |
| return FALSE; | |
| } | |
| $this->connection->query('ALTER TABLE {' . $table . '} DROP INDEX `' . $name . '`'); | |
| return TRUE; | |
| } | |
| public function changeField($table, $field, $field_new, $spec, $keys_new = array()) { | |
| if (!$this->fieldExists($table, $field)) { | |
| throw new SchemaObjectDoesNotExistException(t("Cannot change the definition of field @table.@name: field doesn't exist.", array('@table' => $table, '@name' => $field))); | |
| } | |
| if (($field != $field_new) && $this->fieldExists($table, $field_new)) { | |
| throw new SchemaObjectExistsException(t("Cannot rename field @table.@name to @name_new: target field already exists.", array('@table' => $table, '@name' => $field, '@name_new' => $field_new))); | |
| } | |
| $sql = 'ALTER TABLE {' . $table . '} CHANGE `' . $field . '` ' . $this->createFieldSql($field_new, $this->processField($spec)); | |
| if ($keys_sql = $this->createKeysSql($keys_new)) { | |
| $sql .= ', ADD ' . implode(', ADD ', $keys_sql); | |
| } | |
| $this->connection->query($sql); | |
| } | |
| public function prepareComment($comment, $length = NULL) { | |
| // Truncate comment to maximum comment length. | |
| if (isset($length)) { | |
| // Add table prefixes before truncating. | |
| $comment = Unicode::truncate($this->connection->prefixTables($comment), $length, TRUE, TRUE); | |
| } | |
| // Remove semicolons to avoid triggering multi-statement check. | |
| $comment = strtr($comment, array(';' => '.')); | |
| return $this->connection->quote($comment); | |
| } | |
| /** | |
| * Retrieve a table or column comment. | |
| */ | |
| public function getComment($table, $column = NULL) { | |
| $condition = $this->buildTableNameCondition($table); | |
| if (isset($column)) { | |
| $condition->condition('column_name', $column); | |
| $condition->compile($this->connection, $this); | |
| // Don't use {} around information_schema.columns table. | |
| return $this->connection->query("SELECT column_comment FROM information_schema.columns WHERE " . (string) $condition, $condition->arguments())->fetchField(); | |
| } | |
| $condition->compile($this->connection, $this); | |
| // Don't use {} around information_schema.tables table. | |
| $comment = $this->connection->query("SELECT table_comment FROM information_schema.tables WHERE " . (string) $condition, $condition->arguments())->fetchField(); | |
| // Work-around for MySQL 5.0 bug http://bugs.mysql.com/bug.php?id=11379 | |
| return preg_replace('/; InnoDB free:.*$/', '', $comment); | |
| } | |
| public function tableExists($table) { | |
| // The information_schema table is very slow to query under MySQL 5.0. | |
| // Instead, we try to select from the table in question. If it fails, | |
| // the most likely reason is that it does not exist. That is dramatically | |
| // faster than using information_schema. | |
| // @link http://bugs.mysql.com/bug.php?id=19588 | |
| // @todo This override should be removed once we require a version of MySQL | |
| // that has that bug fixed. | |
| try { | |
| $this->connection->queryRange("SELECT 1 FROM {" . $table . "}", 0, 1); | |
| return TRUE; | |
| } | |
| catch (\Exception $e) { | |
| return FALSE; | |
| } | |
| } | |
| public function fieldExists($table, $column) { | |
| // The information_schema table is very slow to query under MySQL 5.0. | |
| // Instead, we try to select from the table and field in question. If it | |
| // fails, the most likely reason is that it does not exist. That is | |
| // dramatically faster than using information_schema. | |
| // @link http://bugs.mysql.com/bug.php?id=19588 | |
| // @todo This override should be removed once we require a version of MySQL | |
| // that has that bug fixed. | |
| try { | |
| $this->connection->queryRange("SELECT $column FROM {" . $table . "}", 0, 1); | |
| return TRUE; | |
| } | |
| catch (\Exception $e) { | |
| return FALSE; | |
| } | |
| } | |
| } | |
| /** | |
| * @} End of "addtogroup schemaapi". | |
| */ |