Source of file SQL.php
Size: 4,924 Bytes - Last Modified: 2015-11-10T10:05:02-05:00
../src/Query/Drivers/Mysql/SQL.php
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Covered by 15 test(s):
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Covered by 1 test(s):
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| <?php/** * Query * * Free Query Builder / Database Abstraction Layer * * @package Query * @author Timothy J. Warren * @copyright Copyright (c) 2012 - 2014 * @link https://github.com/aviat4ion/Query * @license http://philsturgeon.co.uk/code/dbad-license */// --------------------------------------------------------------------------namespace Query\Drivers\Mysql; /** * MySQL specifc SQL * * @package Query * @subpackage Drivers */class SQL extends \Query\AbstractSQL { /** * Limit clause * * @param string $sql * @param int $limit * @param int $offset * @return string */public function limit($sql, $limit, $offset=FALSE) { if ( ! is_numeric($offset)) { return $sql." LIMIT {$limit}"; } return $sql." LIMIT {$offset}, {$limit}"; } // -------------------------------------------------------------------------- /** * Get the query plan for the sql query * * @param string $sql * @return string */public function explain($sql) { return "EXPLAIN EXTENDED {$sql}"; } // -------------------------------------------------------------------------- /** * Random ordering keyword * * @return string */public function random() { return ' RAND() DESC'; } // -------------------------------------------------------------------------- /** * Returns sql to list other databases * * @return string */public function db_list() { return "SHOW DATABASES WHERE `Database` NOT IN ('information_schema','mysql')"; } // -------------------------------------------------------------------------- /** * Returns sql to list tables * * @param string $database * @return string */public function table_list($database='') { if ( ! empty($database)) return "SHOW TABLES FROM `{$database}`"; return 'SHOW TABLES'; } // -------------------------------------------------------------------------- /** * Overridden in MySQL class * * @return string */public function system_table_list() { return 'SELECT `TABLE_NAME` FROM `information_schema`.`TABLES` WHERE `TABLE_SCHEMA`=\'information_schema\''; } // -------------------------------------------------------------------------- /** * Returns sql to list views * * @return string */public function view_list() { return 'SELECT `table_name` FROM `information_schema`.`views`'; } // -------------------------------------------------------------------------- /** * Returns sql to list triggers * * @return string */public function trigger_list() { return 'SHOW TRIGGERS'; } // -------------------------------------------------------------------------- /** * Return sql to list functions * * @return string */public function function_list() { return 'SHOW FUNCTION STATUS'; } // -------------------------------------------------------------------------- /** * Return sql to list stored procedures * * @return string */public function procedure_list() { return 'SHOW PROCEDURE STATUS'; } // -------------------------------------------------------------------------- /** * Return sql to list sequences * * @return NULL */public function sequence_list() { return NULL; } // -------------------------------------------------------------------------- /** * SQL to show list of field types * * @return string */public function type_list() { return "SELECT DISTINCT `DATA_TYPE` FROM `information_schema`.`COLUMNS`"; } // -------------------------------------------------------------------------- /** * SQL to show infromation about columns in a table * * @param string $table * @return string */public function column_list($table) { return "SHOW FULL COLUMNS FROM {$table}"; } // -------------------------------------------------------------------------- /** * Get the list of foreign keys for the current * table * * @param string $table * @return string */public function fk_list($table) { return <<<SQL SELECT DISTINCT `kcu`.`COLUMN_NAME` as `child_column`, `kcu`.`REFERENCED_TABLE_NAME` as `parent_table`, `kcu`.`REFERENCED_COLUMN_NAME` as `parent_column`, `rc`.`UPDATE_RULE` AS `update`, `rc`.`DELETE_RULE` AS `delete` FROM `INFORMATION_SCHEMA`.`TABLE_CONSTRAINTS` `tc` INNER JOIN `INFORMATION_SCHEMA`.`KEY_COLUMN_USAGE` `kcu` ON `kcu`.`CONSTRAINT_NAME`=`tc`.`CONSTRAINT_NAME` INNER JOIN `INFORMATION_SCHEMA`.`REFERENTIAL_CONSTRAINTS` `rc` ON `rc`.`CONSTRAINT_NAME`=`tc`.`CONSTRAINT_NAME` WHERE `tc`.`CONSTRAINT_TYPE`='FOREIGN KEY'AND `tc`.`TABLE_NAME`='{$table}' SQL; } // -------------------------------------------------------------------------- /** * Get the list of indexes for the current table * * @param string $table * @return array */public function index_list($table) { return "SHOW INDEX IN {$table}"; } }//End of mysql_sql.php |