- <?php
- * @file
- * Database schema code for MySQL database servers.
- */
-
-
- * @addtogroup schemaapi
- * @{
- */
-
- class DatabaseSchema_mysql 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;
-
-
- * 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 {
- $db_info = $this->connection->getConnectionOptions();
- $info['database'] = $db_info['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 DatabaseCondition('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 Backdrop 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();
-
-
- $table += array(
- 'mysql_engine' => 'InnoDB',
-
- 'mysql_character_set' => $this->connection->utf8mb4IsActive() ? 'utf8mb4' : 'utf8',
- );
-
- $sql = "CREATE TABLE {" . $name . "} (\n";
-
-
- foreach ($table['fields'] as $field_name => $field) {
- $sql .= $this->createFieldSql($field_name, $this->processField($field)) . ", \n";
- }
-
-
- $keys = $this->createKeysSql($table);
- if (count($keys)) {
- $sql .= implode(", \n", $keys) . ", \n";
- }
-
-
- $sql = substr($sql, 0, -3) . "\n) ";
-
- $sql .= 'ENGINE = ' . $table['mysql_engine'] . ' DEFAULT CHARACTER SET ' . $table['mysql_character_set'];
-
-
-
-
- if (!empty($info['collation'])) {
- $sql .= ' COLLATE ' . $info['collation'];
- }
-
-
-
-
- if ($this->connection->utf8mb4IsActive()) {
- $sql .= ' ROW_FORMAT=DYNAMIC';
- }
-
-
- if (!empty($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 DatabaseSchema_mysql::processField().
- *
- * @param $name
- * Name of the field.
- * @param $spec
- * The field specification, as per the schema data structure format.
- *
- * @return string
- * A string that can be used to create or alter a table.
- */
- protected function createFieldSql($name, $spec) {
- $sql = "`" . $name . "` " . $spec['mysql_type'];
-
- if (in_array($spec['mysql_type'], array('VARCHAR', 'CHAR', 'TINYTEXT', 'MEDIUMTEXT', 'LONGTEXT', 'TEXT'))) {
- if (isset($spec['length'])) {
- $sql .= '(' . $spec['length'] . ')';
- }
- if (!empty($spec['binary'])) {
- $sql .= ' BINARY';
- }
- }
- elseif (isset($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';
- }
-
-
- if (array_key_exists('default', $spec)) {
- if (is_string($spec['default'])) {
- $spec['default'] = "'" . $spec['default'] . "'";
- }
- elseif (!isset($spec['default'])) {
- $spec['default'] = 'NULL';
- }
- $sql .= ' DEFAULT ' . $spec['default'];
- }
-
- if (empty($spec['not null']) && !isset($spec['default'])) {
- $sql .= ' DEFAULT NULL';
- }
-
-
- if (!empty($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';
- }
-
- $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() {
-
-
-
-
- static $map = array(
- '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',
-
- 'date:normal' => 'DATE',
- 'datetime:normal' => 'DATETIME',
- 'time:normal' => 'TIME',
- );
- return $map;
- }
-
- protected function createKeysSql($spec) {
- $keys = array();
-
- if (!empty($spec['primary key'])) {
- $keys[] = 'PRIMARY KEY (' . $this->createKeysSqlHelper($spec['primary key']) . ')';
- }
- if (!empty($spec['unique keys'])) {
- foreach ($spec['unique keys'] as $key => $fields) {
- $keys[] = 'UNIQUE KEY `' . $key . '` (' . $this->createKeysSqlHelper($fields) . ')';
- }
- }
- if (!empty($spec['indexes'])) {
- foreach ($spec['indexes'] as $index => $fields) {
- $keys[] = 'INDEX `' . $index . '` (' . $this->createKeysSqlHelper($fields) . ')';
- }
- }
-
- return $keys;
- }
-
- protected function createKeySql($fields) {
- $return = array();
- foreach ($fields as $field) {
- if (is_array($field)) {
- $return[] = '`' . $field[0] . '`(' . $field[1] . ')';
- }
- else {
- $return[] = '`' . $field . '`';
- }
- }
- return implode(', ', $return);
- }
-
- protected function createKeysSqlHelper($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 DatabaseSchemaObjectDoesNotExistException(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 DatabaseSchemaObjectExistsException(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 DatabaseSchemaObjectDoesNotExistException(t("Cannot add field @table.@field: table doesn't exist.", array('@field' => $field, '@table' => $table)));
- }
- if ($this->fieldExists($table, $field)) {
- throw new DatabaseSchemaObjectExistsException(t("Cannot add field @table.@field: field already exists.", array('@field' => $field, '@table' => $table)));
- }
-
- $fix_null = FALSE;
- if (!empty($spec['not null']) && !isset($spec['default'])) {
- $fix_null = 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 => $spec['initial']))
- ->execute();
- }
- if ($fix_null) {
- $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 DatabaseSchemaObjectDoesNotExistException(t("Cannot set default value of field @table.@field: field doesn't exist.", array('@table' => $table, '@field' => $field)));
- }
-
- if (!isset($default)) {
- $default = 'NULL';
- }
- else {
- $default = is_string($default) ? "'$default'" : $default;
- }
-
- $this->connection->query('ALTER TABLE {' . $table . '} ALTER COLUMN `' . $field . '` SET DEFAULT ' . $default);
- }
-
- public function fieldSetNoDefault($table, $field) {
- if (!$this->fieldExists($table, $field)) {
- throw new DatabaseSchemaObjectDoesNotExistException(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) {
-
-
- $row = $this->connection->query('SHOW INDEX FROM {' . $table . "} WHERE key_name = '$name'")->fetchAssoc();
- return isset($row['Key_name']);
- }
-
- public function addPrimaryKey($table, $fields) {
- if (!$this->tableExists($table)) {
- throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add primary key to table @table: table doesn't exist.", array('@table' => $table)));
- }
- if ($this->indexExists($table, 'PRIMARY')) {
- throw new DatabaseSchemaObjectExistsException(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 DatabaseSchemaObjectDoesNotExistException(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 DatabaseSchemaObjectExistsException(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 `' . $name . '`');
- return TRUE;
- }
-
- public function addIndex($table, $name, $fields) {
- if (!$this->tableExists($table)) {
- throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add index @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name)));
- }
- if ($this->indexExists($table, $name)) {
- throw new DatabaseSchemaObjectExistsException(t("Cannot add index @name to table @table: index already exists.", array('@table' => $table, '@name' => $name)));
- }
-
- $this->connection->query('ALTER TABLE {' . $table . '} ADD INDEX `' . $name . '` (' . $this->createKeySql($fields) . ')');
- }
-
- 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 DatabaseSchemaObjectDoesNotExistException(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 DatabaseSchemaObjectExistsException(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) {
-
- $comment = str_replace("'", '’', $comment);
-
-
- $comment = str_replace('`', '', $this->connection->prefixTables($comment));
-
-
- if (isset($length)) {
- $comment = truncate_utf8($comment, $length, TRUE, TRUE);
- }
-
- 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);
-
- return $this->connection->query("SELECT column_comment FROM information_schema.columns WHERE " . (string) $condition, $condition->arguments())->fetchField();
- }
- $condition->compile($this->connection, $this);
-
- return $this->connection->query("SELECT table_comment FROM information_schema.tables WHERE " . (string) $condition, $condition->arguments())->fetchField();
- }
-
- public function findTables($table_expression) {
-
-
-
- $table_expression = str_replace('`', '', $table_expression);
- return parent::findTables($table_expression);
- }
-
- }
-
- * @} End of "addtogroup schemaapi".
- */