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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
*/
namespace yii\db\sqlite;
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use yii\db\Exception;
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use yii\base\InvalidParamException;
use yii\base\NotSupportedException;
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/**
* QueryBuilder is the query builder for SQLite databases.
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*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class QueryBuilder extends \yii\db\QueryBuilder
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{
/**
* @var array mapping from abstract column types (keys) to physical column types (values).
*/
public $typeMap = array(
Schema::TYPE_PK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL',
Schema::TYPE_STRING => 'varchar(255)',
Schema::TYPE_TEXT => 'text',
Schema::TYPE_SMALLINT => 'smallint',
Schema::TYPE_INTEGER => 'integer',
Schema::TYPE_BIGINT => 'bigint',
Schema::TYPE_FLOAT => 'float',
Schema::TYPE_DECIMAL => 'decimal',
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)',
);
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/**
* Creates a SQL statement for resetting the sequence value of a table's primary key.
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* 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
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* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
* the next new row's primary key will have a value 1.
* @return string the SQL statement for resetting sequence
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* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table.
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*/
public function resetSequence($tableName, $value = null)
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{
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$db = $this->db;
$table = $db->getTableSchema($tableName);
if ($table !== null && $table->sequenceName !== null) {
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if ($value === null) {
$key = reset($table->primaryKey);
$tableName = $db->quoteTableName($tableName);
$value = $db->createCommand("SELECT MAX('$key') FROM $tableName")->queryScalar();
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} else {
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$value = (int)$value - 1;
}
try {
// it's possible sqlite_sequence does not exist
$db->createCommand("UPDATE sqlite_sequence SET seq='$value' WHERE name='{$table->name}'")->execute();
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} catch (Exception $e) {
}
} elseif ($table === null) {
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throw new InvalidParamException("Table not found: $tableName");
} else {
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throw new InvalidParamException("There is not sequence associated with table '$tableName'.'");
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}
}
/**
* Enables or disables integrity check.
* @param boolean $check whether to turn on or off the integrity check.
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
* @throws NotSupportedException this is not supported by SQLite
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*/
public function checkIntegrity($check = true, $schema = '')
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
/**
* Builds a SQL statement for truncating a DB table.
* @param string $table the table to be truncated. The name will be properly quoted by the method.
* @return string the SQL statement for truncating a DB table.
*/
public function truncateTable($table)
{
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return "DELETE FROM " . $this->db->quoteTableName($table);
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}
/**
* Builds a SQL statement for dropping an index.
* @param string $name the name of the index to be dropped. The name will be properly quoted by the method.
* @param string $table the table whose index is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping an index.
*/
public function dropIndex($name, $table)
{
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return 'DROP INDEX ' . $this->db->quoteTableName($name);
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}
/**
* Builds a SQL statement for dropping a DB column.
* @param string $table the table whose column is to be dropped. The name will be properly quoted by the method.
* @param string $column the name of the column to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a DB column.
* @throws NotSupportedException this is not supported by SQLite
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*/
public function dropColumn($table, $column)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
/**
* 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 $newName the new name of the column. The name will be properly quoted by the method.
* @return string the SQL statement for renaming a DB column.
* @throws NotSupportedException this is not supported by SQLite
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*/
public function renameColumn($table, $oldName, $newName)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
/**
* Builds a SQL statement for adding a foreign key constraint to an existing table.
* The method will properly quote the table and column names.
* @param string $name the name of the foreign key constraint.
* @param string $table the table that the foreign key constraint will be added to.
* @param string|array $columns the name of the column to that the constraint will be added on.
* If there are multiple columns, separate them with commas or use an array to represent them.
* @param string $refTable the table that the foreign key references to.
* @param string|array $refColumns the name of the column that the foreign key references to.
* If there are multiple columns, separate them with commas or use an array to represent them.
* @param string $delete the ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @param string $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL
* @return string the SQL statement for adding a foreign key constraint to an existing table.
* @throws NotSupportedException this is not supported by SQLite
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*/
public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
/**
* 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 $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
* @return string the SQL statement for dropping a foreign key constraint.
* @throws NotSupportedException this is not supported by SQLite
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*/
public function dropForeignKey($name, $table)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
/**
* Builds a SQL statement for changing the definition of a column.
* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method.
* @param string $column the name of the column to be changed. The name will be properly quoted by the method.
* @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract
* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept
* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null'
* will become 'varchar(255) not null'.
* @return string the SQL statement for changing the definition of a column.
* @throws NotSupportedException this is not supported by SQLite
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*/
public function alterColumn($table, $column, $type)
{
throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.');
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}
}