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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\mysql;
use yii\db\Exception;
use yii\base\InvalidParamException;
/**
* QueryBuilder is the query builder for MySQL databases.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\db\QueryBuilder
{
/**
* @var array mapping from abstract column types (keys) to physical column types (values).
*/
public $typeMap = array(
Schema::TYPE_PK => 'int(11) not null auto_increment primary key',
Schema::TYPE_STRING => 'varchar(255)',
Schema::TYPE_TEXT => 'text',
Schema::TYPE_SMALLINT => 'smallint(6)',
Schema::TYPE_INTEGER => 'int(11)',
Schema::TYPE_BIGINT => 'bigint(20)',
Schema::TYPE_FLOAT => 'float',
Schema::TYPE_DECIMAL => 'decimal(10,0)',
Schema::TYPE_DATETIME => 'datetime',
Schema::TYPE_TIMESTAMP => 'timestamp',
Schema::TYPE_TIME => 'time',
Schema::TYPE_DATE => 'date',
Schema::TYPE_BINARY => 'blob',
Schema::TYPE_BOOLEAN => 'tinyint(1)',
Schema::TYPE_MONEY => 'decimal(19,4)',
);
/**
* Builds a SQL statement for renaming a column.
* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
* @param string $oldName the old name of the column. The name will be properly quoted by the method.
* @param string $newName the new name of the column. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB column.
* @throws Exception
*/
public function renameColumn($table, $oldName, $newName)
{
$quotedTable = $this->db->quoteTableName($table);
$row = $this->db->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryOne();
if ($row === false) {
throw new Exception("Unable to find column '$oldName' in table '$table'.");
}
if (isset($row['Create Table'])) {
$sql = $row['Create Table'];
} else {
$row = array_values($row);
$sql = $row[1];
}
if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches)) {
foreach ($matches[1] as $i => $c) {
if ($c === $oldName) {
return "ALTER TABLE $quotedTable CHANGE "
. $this->db->quoteColumnName($oldName) . ' '
. $this->db->quoteColumnName($newName) . ' '
. $matches[2][$i];
}
}
}
// try to give back a SQL anyway
return "ALTER TABLE $quotedTable CHANGE "
. $this->db->quoteColumnName($oldName) . ' '
. $this->db->quoteColumnName($newName);
}
/**
* Builds a SQL statement for dropping a foreign key constraint.
* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a foreign key constraint.
*/
public function dropForeignKey($name, $table)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table)
. ' DROP FOREIGN KEY ' . $this->db->quoteColumnName($name);
}
/**
* Builds a SQL statement for removing a primary key constraint to an existing table.
* @param string $name the name of the primary key constraint to be removed.
* @param string $table the table that the primary key constraint will be removed from.
* @return string the SQL statement for removing a primary key constraint from an existing table.
*/
public function dropPrimaryKey($name, $table)
{
return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' DROP PRIMARY KEY';
}
/**
* Creates a SQL statement for resetting the sequence value of a table's primary key.
* The sequence will be reset such that the primary key of the next new row inserted
* will have the specified value or 1.
* @param string $tableName the name of the table whose primary key sequence will be reset
* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have a value 1.
* @return string the SQL statement for resetting sequence
* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
*/
public function resetSequence($tableName, $value = null)
{
$table = $this->db->getTableSchema($tableName);
if ($table !== null && $table->sequenceName !== null) {
$tableName = $this->db->quoteTableName($tableName);
if ($value === null) {
$key = reset($table->primaryKey);
$value = $this->db->createCommand("SELECT MAX(`$key`) FROM $tableName")->queryScalar() + 1;
} else {
$value = (int)$value;
}
return "ALTER TABLE $tableName AUTO_INCREMENT=$value";
} elseif ($table === null) {
throw new InvalidParamException("Table not found: $tableName");
} else {
throw new InvalidParamException("There is not sequence associated with table '$tableName'.");
}
}
/**
* Builds a SQL statement for enabling or disabling integrity check.
* @param boolean $check whether to turn on or off the integrity check.
* @param string $table the table name. Meaningless for MySQL.
* @param string $schema the schema of the tables. Meaningless for MySQL.
* @return string the SQL statement for checking integrity
*/
public function checkIntegrity($check = true, $schema = '', $table = '')
{
return 'SET FOREIGN_KEY_CHECKS = ' . ($check ? 1 : 0);
}
/**
* Generates a batch INSERT SQL statement.
* For example,
*
* ~~~
* $connection->createCommand()->batchInsert('tbl_user', array('name', 'age'), array(
* array('Tom', 30),
* array('Jane', 20),
* array('Linda', 25),
* ))->execute();
* ~~~
*
* Note that the values in each row must match the corresponding column names.
*
* @param string $table the table that new rows will be inserted into.
* @param array $columns the column names
* @param array $rows the rows to be batch inserted into the table
* @return string the batch INSERT SQL statement
*/
public function batchInsert($table, $columns, $rows)
{
if (($tableSchema = $this->db->getTableSchema($table)) !== null) {
$columnSchemas = $tableSchema->columns;
} else {
$columnSchemas = array();
}
foreach ($columns as $i => $name) {
$columns[$i] = $this->db->quoteColumnName($name);
}
$values = array();
foreach ($rows as $row) {
$vs = array();
foreach ($row as $i => $value) {
if (!is_array($value) && isset($columnSchemas[$columns[$i]])) {
$value = $columnSchemas[$columns[$i]]->typecast($value);
}
$vs[] = is_string($value) ? $this->db->quoteValue($value) : $value;
}
$values[] = '(' . implode(', ', $vs) . ')';
}
return 'INSERT INTO ' . $this->db->quoteTableName($table)
. ' (' . implode(', ', $columns) . ') VALUES ' . implode(', ', $values);
}
}