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<?php |
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namespace Tsukasa\QueryBuilder\Database\Sqlite; |
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use Exception; |
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use Tsukasa\QueryBuilder\BaseAdapter; |
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use Tsukasa\QueryBuilder\Exception\NotSupportedException; |
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use Tsukasa\QueryBuilder\Interfaces\IAdapter; |
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use Tsukasa\QueryBuilder\Interfaces\ISQLGenerator; |
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class Adapter extends BaseAdapter implements IAdapter, ISQLGenerator |
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{ |
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/** |
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* Quotes a table name for use in a query. |
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* A simple table name has no schema prefix. |
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* @param string $name table name |
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* @return string the properly quoted table name |
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*/ |
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public function quoteSimpleTableName($name) |
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{ |
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return strpos($name, "`") !== false ? $name : "`" . $name . "`"; |
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} |
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/** |
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* Quotes a column name for use in a query. |
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* A simple column name has no prefix. |
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* @param string $name column name |
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* @return string the properly quoted column name |
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*/ |
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public function quoteSimpleColumnName($name) |
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{ |
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return strpos($name, '`') !== false || $name === '*' ? $name : '`' . $name . '`'; |
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} |
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public function getLookupCollection() |
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{ |
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return new LookupCollection(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getRandomOrder() |
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{ |
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return 'RANDOM()'; |
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} |
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/** |
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* @param $oldTableName |
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* @param $newTableName |
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* @return string |
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*/ |
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public function sqlRenameTable($oldTableName, $newTableName) |
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{ |
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return 'ALTER TABLE ' . $this->quoteTableName($oldTableName) . ' RENAME TO ' . $this->quoteTableName($newTableName); |
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} |
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/** |
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* @param $tableName |
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* @param bool $cascade |
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* @return string |
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*/ |
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public function sqlTruncateTable($tableName, $cascade = false) |
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{ |
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return "DELETE FROM " . $this->quoteTableName($tableName); |
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} |
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/** |
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* @param $tableName |
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* @param $name |
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* @return string |
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*/ |
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public function sqlDropIndex($tableName, $name) |
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{ |
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return 'DROP INDEX ' . $this->quoteColumn($name); |
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} |
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/** |
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* @param $tableName |
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* @param $column |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlDropColumn($tableName, $column) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $tableName |
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* @param $oldName |
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* @param $newName |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlRenameColumn($tableName, $oldName, $newName) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $tableName |
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* @param $name |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlDropForeignKey($tableName, $name) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $tableName |
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* @param $name |
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* @param $columns |
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* @param $refTable |
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* @param $refColumns |
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* @param null $delete |
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* @param null $update |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlAddForeignKey($tableName, $name, $columns, $refTable, $refColumns, $delete = null, $update = null) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $tableName |
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* @param $column |
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* @param $type |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlAlterColumn($tableName, $column, $type) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $tableName |
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* @param $name |
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* @param $columns |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlAddPrimaryKey($tableName, $name, $columns) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $tableName |
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* @param $name |
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* @return string |
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* @throws Exception |
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*/ |
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public function sqlDropPrimaryKey($tableName, $name) |
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{ |
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throw new NotSupportedException('not supported by SQLite'); |
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} |
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/** |
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* @param $value |
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* @return string |
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*/ |
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public function getBoolean($value = null) |
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{ |
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return (bool)$value ? 1 : 0; |
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} |
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/** |
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* @param $value string|\DateTime |
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* @param $format string |
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* @return string |
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*/ |
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protected function formatDateTime($value, $format) |
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{ |
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if ($value instanceof \DateTime) { |
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$value = $value->format($format); |
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} |
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elseif ($value === null) { |
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$value = date($format); |
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} |
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elseif (is_numeric($value)) { |
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$value = date($format, $value); |
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} |
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elseif (is_string($value)) { |
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$value = date($format, strtotime($value)); |
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} |
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return (string)$value; |
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} |
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public function getDateTime($value = null) |
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{ |
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return $this->formatDateTime($value, "Y-m-d H:i:s"); |
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} |
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public function getDate($value = null) |
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{ |
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return $this->formatDateTime($value, "Y-m-d"); |
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} |
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/** |
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* @param $limit |
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* @param null $offset |
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* @return mixed |
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*/ |
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public function sqlLimitOffset($limit = null, $offset = null) |
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{ |
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if ($this->hasLimit($limit)) { |
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$sql = 'LIMIT ' . $limit; |
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if ($this->hasOffset($offset)) { |
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$sql .= ' OFFSET ' . $offset; |
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} |
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return ' ' . $sql; |
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} |
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if ($this->hasOffset($offset)) { |
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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 the LIMIT expression evaluates to a negative value, then there |
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// is no upper bound on the number of rows returned. |
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// -1 or 9223372036854775807 2^63-1 |
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return ' LIMIT 9223372036854775807 OFFSET ' . $offset; // 2^63-1 |
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} |
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return ''; |
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} |
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/** |
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* @param $tableName |
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* @param $column |
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* @param $type |
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* @return string |
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*/ |
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public function sqlAddColumn($tableName, $column, $type) |
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{ |
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return 'ALTER TABLE ' . $this->quoteTableName($tableName) . ' ADD COLUMN ' . $this->quoteColumn($column) . ' ' . $type; |
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} |
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/** |
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* @param $sequenceName |
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* @param $value |
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* @return string |
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*/ |
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public function sqlResetSequence($sequenceName, $value = null) |
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{ |
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return 'UPDATE sqlite_sequence SET seq=' . $this->quoteValue($value) . ' WHERE name=' . $this->quoteValue($sequenceName); |
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} |
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/** |
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* @param bool $check |
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* @param string $schema |
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* @param string $table |
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* @return string |
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*/ |
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public function sqlCheckIntegrity($check = true, $schema = '', $table = '') |
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{ |
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return 'PRAGMA foreign_keys=' . $this->getBoolean($check); |
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} |
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} |