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275 lines
11 KiB
275 lines
11 KiB
<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\db\sqlite; |
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use yii\db\Exception; |
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use yii\base\InvalidParamException; |
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use yii\base\NotSupportedException; |
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/** |
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* QueryBuilder is the query builder for SQLite databases. |
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* |
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* @author Qiang Xue <qiang.xue@gmail.com> |
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* @since 2.0 |
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*/ |
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class QueryBuilder extends \yii\db\QueryBuilder |
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{ |
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/** |
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* @var array mapping from abstract column types (keys) to physical column types (values). |
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*/ |
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public $typeMap = [ |
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Schema::TYPE_PK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL', |
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Schema::TYPE_BIGPK => 'integer PRIMARY KEY AUTOINCREMENT NOT NULL', |
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Schema::TYPE_STRING => 'varchar(255)', |
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Schema::TYPE_TEXT => 'text', |
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Schema::TYPE_SMALLINT => 'smallint', |
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Schema::TYPE_INTEGER => 'integer', |
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Schema::TYPE_BIGINT => 'bigint', |
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Schema::TYPE_FLOAT => 'float', |
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Schema::TYPE_DECIMAL => 'decimal(10,0)', |
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Schema::TYPE_DATETIME => 'datetime', |
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Schema::TYPE_TIMESTAMP => 'timestamp', |
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Schema::TYPE_TIME => 'time', |
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Schema::TYPE_DATE => 'date', |
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Schema::TYPE_BINARY => 'blob', |
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Schema::TYPE_BOOLEAN => 'boolean', |
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Schema::TYPE_MONEY => 'decimal(19,4)', |
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]; |
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/** |
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* Generates a batch INSERT SQL statement. |
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* For example, |
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* |
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* ~~~ |
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* $connection->createCommand()->batchInsert('tbl_user', ['name', 'age'], [ |
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* ['Tom', 30], |
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* ['Jane', 20], |
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* ['Linda', 25], |
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* ])->execute(); |
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* ~~~ |
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* |
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* Note that the values in each row must match the corresponding column names. |
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* |
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* @param string $table the table that new rows will be inserted into. |
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* @param array $columns the column names |
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* @param array $rows the rows to be batch inserted into the table |
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* @return string the batch INSERT SQL statement |
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*/ |
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public function batchInsert($table, $columns, $rows) |
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{ |
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if (($tableSchema = $this->db->getTableSchema($table)) !== null) { |
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$columnSchemas = $tableSchema->columns; |
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} else { |
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$columnSchemas = []; |
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} |
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foreach ($columns as $i => $name) { |
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$columns[$i] = $this->db->quoteColumnName($name); |
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} |
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$values = []; |
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foreach ($rows as $row) { |
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$vs = []; |
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foreach ($row as $i => $value) { |
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if (!is_array($value) && isset($columnSchemas[$columns[$i]])) { |
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$value = $columnSchemas[$columns[$i]]->typecast($value); |
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} |
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$vs[] = is_string($value) ? $this->db->quoteValue($value) : $value; |
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} |
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$values[] = implode(', ', $vs); |
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} |
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return 'INSERT INTO ' . $this->db->quoteTableName($table) |
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. ' (' . implode(', ', $columns) . ') SELECT ' . implode(' UNION ALL ', $values); |
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} |
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/** |
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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 |
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* will have the specified value or 1. |
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* @param string $tableName the name of the table whose primary key sequence will be reset |
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* @param mixed $value the value for the primary key of the next new row inserted. If this is not set, |
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* the next new row's primary key will have a value 1. |
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* @return string the SQL statement for resetting sequence |
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* @throws InvalidParamException if the table does not exist or there is no sequence associated with the table. |
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*/ |
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public function resetSequence($tableName, $value = null) |
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{ |
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$db = $this->db; |
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$table = $db->getTableSchema($tableName); |
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if ($table !== null && $table->sequenceName !== null) { |
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if ($value === null) { |
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$key = reset($table->primaryKey); |
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$tableName = $db->quoteTableName($tableName); |
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$value = $db->createCommand("SELECT MAX('$key') FROM $tableName")->queryScalar(); |
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} else { |
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$value = (int)$value - 1; |
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} |
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try { |
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// it's possible sqlite_sequence does not exist |
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$db->createCommand("UPDATE sqlite_sequence SET seq='$value' WHERE name='{$table->name}'")->execute(); |
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} catch (Exception $e) { |
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} |
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} elseif ($table === null) { |
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throw new InvalidParamException("Table not found: $tableName"); |
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} else { |
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throw new InvalidParamException("There is not sequence associated with table '$tableName'.'"); |
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} |
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} |
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/** |
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* Enables or disables integrity check. |
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* @param boolean $check whether to turn on or off the integrity check. |
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* @param string $schema the schema of the tables. Meaningless for SQLite. |
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* @param string $table the table name. Meaningless for SQLite. |
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* @return string the SQL statement for checking integrity |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function checkIntegrity($check = true, $schema = '', $table = '') |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for truncating a DB table. |
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* @param string $table the table to be truncated. The name will be properly quoted by the method. |
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* @return string the SQL statement for truncating a DB table. |
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*/ |
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public function truncateTable($table) |
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{ |
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return "DELETE FROM " . $this->db->quoteTableName($table); |
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} |
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/** |
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* Builds a SQL statement for dropping an index. |
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* @param string $name the name of the index to be dropped. The name will be properly quoted by the method. |
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* @param string $table the table whose index is to be dropped. The name will be properly quoted by the method. |
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* @return string the SQL statement for dropping an index. |
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*/ |
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public function dropIndex($name, $table) |
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{ |
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return 'DROP INDEX ' . $this->db->quoteTableName($name); |
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} |
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/** |
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* Builds a SQL statement for dropping a DB column. |
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* @param string $table the table whose column is to be dropped. The name will be properly quoted by the method. |
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* @param string $column the name of the column to be dropped. The name will be properly quoted by the method. |
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* @return string the SQL statement for dropping a DB column. |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function dropColumn($table, $column) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for renaming a column. |
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* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method. |
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* @param string $oldName the old name of the column. The name will be properly quoted by the method. |
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* @param string $newName the new name of the column. The name will be properly quoted by the method. |
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* @return string the SQL statement for renaming a DB column. |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function renameColumn($table, $oldName, $newName) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for adding a foreign key constraint to an existing table. |
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* The method will properly quote the table and column names. |
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* @param string $name the name of the foreign key constraint. |
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* @param string $table the table that the foreign key constraint will be added to. |
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* @param string|array $columns the name of the column to that the constraint will be added on. |
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* If there are multiple columns, separate them with commas or use an array to represent them. |
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* @param string $refTable the table that the foreign key references to. |
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* @param string|array $refColumns the name of the column that the foreign key references to. |
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* If there are multiple columns, separate them with commas or use an array to represent them. |
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* @param string $delete the ON DELETE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL |
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* @param string $update the ON UPDATE option. Most DBMS support these options: RESTRICT, CASCADE, NO ACTION, SET DEFAULT, SET NULL |
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* @return string the SQL statement for adding a foreign key constraint to an existing table. |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for dropping a foreign key constraint. |
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* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method. |
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* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method. |
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* @return string the SQL statement for dropping a foreign key constraint. |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function dropForeignKey($name, $table) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for changing the definition of a column. |
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* @param string $table the table whose column is to be changed. The table name will be properly quoted by the method. |
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* @param string $column the name of the column to be changed. The name will be properly quoted by the method. |
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* @param string $type the new column type. The [[getColumnType()]] method will be invoked to convert abstract |
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* column type (if any) into the physical one. Anything that is not recognized as abstract type will be kept |
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* in the generated SQL. For example, 'string' will be turned into 'varchar(255)', while 'string not null' |
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* will become 'varchar(255) not null'. |
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* @return string the SQL statement for changing the definition of a column. |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function alterColumn($table, $column, $type) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for adding a primary key constraint to an existing table. |
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* @param string $name the name of the primary key constraint. |
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* @param string $table the table that the primary key constraint will be added to. |
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* @param string|array $columns comma separated string or array of columns that the primary key will consist of. |
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* @return string the SQL statement for adding a primary key constraint to an existing table. |
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* @throws NotSupportedException this is not supported by SQLite |
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*/ |
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public function addPrimaryKey($name, $table, $columns) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* Builds a SQL statement for removing a primary key constraint to an existing table. |
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* @param string $name the name of the primary key constraint to be removed. |
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* @param string $table the table that the primary key constraint will be removed from. |
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* @return string the SQL statement for removing a primary key constraint from an existing table. |
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* @throws NotSupportedException this is not supported by SQLite * |
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*/ |
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public function dropPrimaryKey($name, $table) |
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{ |
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throw new NotSupportedException(__METHOD__ . ' is not supported by SQLite.'); |
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} |
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/** |
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* @inheritDocs |
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*/ |
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public function buildLimit($limit, $offset) |
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{ |
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$sql = ''; |
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// limit is not optional in SQLite |
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// http://www.sqlite.org/syntaxdiagrams.html#select-stmt |
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if ($limit !== null && $limit >= 0) { |
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$sql = 'LIMIT ' . (int)$limit; |
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if ($offset > 0) { |
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$sql .= ' OFFSET ' . (int)$offset; |
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} |
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} elseif ($offset > 0) { |
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$sql = 'LIMIT 9223372036854775807 OFFSET ' . (int)$offset; // 2^63-1 |
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} |
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return $sql; |
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} |
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}
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