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<?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\oci; |
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use yii\base\InvalidParamException; |
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use yii\db\Connection; |
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use yii\db\Exception; |
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use yii\db\Expression; |
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/** |
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* QueryBuilder is the query builder for Oracle databases. |
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* |
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* @author Qiang Xue <[email protected]> |
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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 => 'NUMBER(10) NOT NULL PRIMARY KEY', |
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Schema::TYPE_UPK => 'NUMBER(10) UNSIGNED NOT NULL PRIMARY KEY', |
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Schema::TYPE_BIGPK => 'NUMBER(20) NOT NULL PRIMARY KEY', |
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Schema::TYPE_UBIGPK => 'NUMBER(20) UNSIGNED NOT NULL PRIMARY KEY', |
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Schema::TYPE_CHAR => 'CHAR(1)', |
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Schema::TYPE_STRING => 'VARCHAR2(255)', |
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Schema::TYPE_TEXT => 'CLOB', |
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Schema::TYPE_SMALLINT => 'NUMBER(5)', |
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Schema::TYPE_INTEGER => 'NUMBER(10)', |
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Schema::TYPE_BIGINT => 'NUMBER(20)', |
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Schema::TYPE_FLOAT => 'NUMBER', |
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Schema::TYPE_DOUBLE => 'NUMBER', |
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Schema::TYPE_DECIMAL => 'NUMBER', |
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Schema::TYPE_DATETIME => 'TIMESTAMP', |
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Schema::TYPE_TIMESTAMP => 'TIMESTAMP', |
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Schema::TYPE_TIME => 'TIMESTAMP', |
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Schema::TYPE_DATE => 'DATE', |
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Schema::TYPE_BINARY => 'BLOB', |
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Schema::TYPE_BOOLEAN => 'NUMBER(1)', |
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Schema::TYPE_MONEY => 'NUMBER(19,4)', |
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]; |
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/** |
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* @inheritdoc |
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*/ |
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public function buildOrderByAndLimit($sql, $orderBy, $limit, $offset) |
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{ |
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$orderBy = $this->buildOrderBy($orderBy); |
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if ($orderBy !== '') { |
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$sql .= $this->separator . $orderBy; |
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} |
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$filters = []; |
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if ($this->hasOffset($offset)) { |
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$filters[] = 'rowNumId > ' . $offset; |
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} |
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if ($this->hasLimit($limit)) { |
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$filters[] = 'rownum <= ' . $limit; |
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} |
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if (empty($filters)) { |
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return $sql; |
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} |
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$filter = implode(' AND ', $filters); |
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return <<<EOD |
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WITH USER_SQL AS ($sql), |
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PAGINATION AS (SELECT USER_SQL.*, rownum as rowNumId FROM USER_SQL) |
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SELECT * |
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FROM PAGINATION |
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WHERE $filter |
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EOD; |
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} |
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/** |
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* Builds a SQL statement for renaming a DB table. |
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* |
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* @param string $table the table to be renamed. The name will be properly quoted by the method. |
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* @param string $newName the new table name. The name will be properly quoted by the method. |
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* @return string the SQL statement for renaming a DB table. |
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*/ |
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public function renameTable($table, $newName) |
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{ |
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return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' RENAME TO ' . $this->db->quoteTableName($newName); |
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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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* |
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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 $type the new column type. The [[getColumnType]] method will be invoked to convert abstract column type (if any) |
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* into the physical one. Anything that is not recognized as abstract type will be kept in the generated SQL. |
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* For example, 'string' will be turned into 'varchar(255)', while 'string not null' will become 'varchar(255) not null'. |
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* @return string the SQL statement for changing the definition of a column. |
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*/ |
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public function alterColumn($table, $column, $type) |
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{ |
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$type = $this->getColumnType($type); |
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return 'ALTER TABLE ' . $this->db->quoteTableName($table) . ' MODIFY ' . $this->db->quoteColumnName($column) . ' ' . $this->getColumnType($type); |
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} |
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/** |
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* Builds a SQL statement for dropping an index. |
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* |
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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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* @inheritdoc |
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*/ |
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public function resetSequence($table, $value = null) |
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{ |
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$tableSchema = $this->db->getTableSchema($table); |
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if ($tableSchema === null) { |
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throw new InvalidParamException("Unknown table: $table"); |
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} |
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if ($tableSchema->sequenceName === null) { |
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return ''; |
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} |
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if ($value !== null) { |
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$value = (int) $value; |
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} else { |
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// use master connection to get the biggest PK value |
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$value = $this->db->useMaster(function (Connection $db) use ($tableSchema) { |
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return $db->createCommand("SELECT MAX(\"{$tableSchema->primaryKey}\") FROM \"{$tableSchema->name}\"")->queryScalar(); |
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}) + 1; |
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} |
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return "DROP SEQUENCE \"{$tableSchema->name}_SEQ\";" |
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. "CREATE SEQUENCE \"{$tableSchema->name}_SEQ\" START WITH {$value} INCREMENT BY 1 NOMAXVALUE NOCACHE"; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function addForeignKey($name, $table, $columns, $refTable, $refColumns, $delete = null, $update = null) |
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{ |
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$sql = 'ALTER TABLE ' . $this->db->quoteTableName($table) |
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. ' ADD CONSTRAINT ' . $this->db->quoteColumnName($name) |
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. ' FOREIGN KEY (' . $this->buildColumns($columns) . ')' |
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. ' REFERENCES ' . $this->db->quoteTableName($refTable) |
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. ' (' . $this->buildColumns($refColumns) . ')'; |
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if ($delete !== null) { |
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$sql .= ' ON DELETE ' . $delete; |
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} |
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if ($update !== null) { |
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throw new Exception('Oracle does not support ON UPDATE clause.'); |
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} |
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return $sql; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function insert($table, $columns, &$params) |
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{ |
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$schema = $this->db->getSchema(); |
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if (($tableSchema = $schema->getTableSchema($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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$names = []; |
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$placeholders = []; |
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$values = ' DEFAULT VALUES'; |
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if ($columns instanceof \yii\db\Query) { |
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list($names, $values) = $this->prepareInsertSelectSubQuery($columns, $schema); |
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} else { |
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foreach ($columns as $name => $value) { |
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$names[] = $schema->quoteColumnName($name); |
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if ($value instanceof Expression) { |
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$placeholders[] = $value->expression; |
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foreach ($value->params as $n => $v) { |
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$params[$n] = $v; |
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} |
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} elseif ($value instanceof \yii\db\Query) { |
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list($sql, $params) = $this->build($value, $params); |
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$placeholders[] = "($sql)"; |
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} else { |
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$phName = self::PARAM_PREFIX . count($params); |
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$placeholders[] = $phName; |
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$params[$phName] = !is_array($value) && isset($columnSchemas[$name]) ? $columnSchemas[$name]->dbTypecast($value) : $value; |
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} |
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} |
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if (empty($names) && $tableSchema !== null) { |
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$columns = !empty($tableSchema->primaryKey) ? $tableSchema->primaryKey : [reset($tableSchema->columns)->name]; |
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foreach ($columns as $name) { |
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$names[] = $schema->quoteColumnName($name); |
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$placeholders[] = 'DEFAULT'; |
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} |
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} |
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} |
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return 'INSERT INTO ' . $schema->quoteTableName($table) |
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. (!empty($names) ? ' (' . implode(', ', $names) . ')' : '') |
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. (!empty($placeholders) ? ' VALUES (' . implode(', ', $placeholders) . ')' : $values); |
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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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* ```php |
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* $sql = $queryBuilder->batchInsert('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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* ]); |
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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, $rows) |
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{ |
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if (empty($rows)) { |
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return ''; |
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} |
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$schema = $this->db->getSchema(); |
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if (($tableSchema = $schema->getTableSchema($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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$values = []; |
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foreach ($rows as $row) { |
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$vs = []; |
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foreach ($row as $i => $value) { |
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if (isset($columns[$i], $columnSchemas[$columns[$i]]) && !is_array($value)) { |
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$value = $columnSchemas[$columns[$i]]->dbTypecast($value); |
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} |
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if (is_string($value)) { |
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$value = $schema->quoteValue($value); |
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} elseif ($value === false) { |
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$value = 0; |
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} elseif ($value === null) { |
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$value = 'NULL'; |
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} |
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$vs[] = $value; |
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} |
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$values[] = '(' . implode(', ', $vs) . ')'; |
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} |
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foreach ($columns as $i => $name) { |
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$columns[$i] = $schema->quoteColumnName($name); |
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} |
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$tableAndColumns = ' INTO ' . $schema->quoteTableName($table) |
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. ' (' . implode(', ', $columns) . ') VALUES '; |
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return 'INSERT ALL ' . $tableAndColumns . implode($tableAndColumns, $values) . ' SELECT 1 FROM SYS.DUAL'; |
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} |
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/** |
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* @inheritdoc |
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* @since 2.0.8 |
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*/ |
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public function selectExists($rawSql) |
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{ |
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return 'SELECT CASE WHEN EXISTS(' . $rawSql . ') THEN 1 ELSE 0 END FROM DUAL'; |
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} |
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/** |
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* @inheritdoc |
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* @since 2.0.8 |
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*/ |
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public function dropCommentFromColumn($table, $column) |
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{ |
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return 'COMMENT ON COLUMN ' . $this->db->quoteTableName($table) . '.' . $this->db->quoteColumnName($column) . " IS ''"; |
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} |
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/** |
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* @inheritdoc |
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* @since 2.0.8 |
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*/ |
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public function dropCommentFromTable($table) |
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{ |
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return 'COMMENT ON TABLE ' . $this->db->quoteTableName($table) . " IS ''"; |
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} |
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} |
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rob006 /
yii2-dev
