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@ -7,6 +7,7 @@ |
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*/ |
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*/ |
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namespace yii\db\pgsql; |
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namespace yii\db\pgsql; |
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use yii\base\InvalidParamException; |
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/** |
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/** |
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* QueryBuilder is the query builder for PostgreSQL databases. |
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* QueryBuilder is the query builder for PostgreSQL databases. |
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@ -62,6 +63,66 @@ class QueryBuilder extends \yii\db\QueryBuilder |
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} |
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} |
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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, $value = null) |
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{ |
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$table = $this->db->getTableSchema($tableName); |
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if ($table !== null && $table->sequenceName !== null) { |
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$sequence='"'.$table->sequenceName.'"'; |
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if(strpos($sequence,'.')!==false) |
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$sequence=str_replace('.','"."',$sequence); |
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$tableName = $this->db->quoteTableName($tableName); |
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if ($value === null) { |
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$key = reset($table->primaryKey); |
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$value="(SELECT COALESCE(MAX(\"{$key}\"),0) FROM {$tableName})+1"; |
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} else { |
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$value = (int)$value; |
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} |
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return "SELECT SETVAL('$sequence',$value,false)"; |
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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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* Builds a SQL statement for enabling or disabling integrity check. |
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* @param boolean $check whether to turn on or off the integrity check. |
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* @param string $table the table name. Meaningless for MySQL. |
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* @param string $schema the schema of the tables. Meaningless for MySQL. |
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* @return string the SQL statement for checking integrity |
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*/ |
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public function checkIntegrity($check = true, $schema = '', $table = '') |
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{ |
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$enable=$check ? 'ENABLE' : 'DISABLE'; |
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$tableNames=$this->db->schema->findTableNames($schema); |
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$command = ''; |
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foreach($tableNames as $tableName) |
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{ |
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$tableName='"'.$tableName.'"'; |
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if(strpos($tableName,'.')!==false) |
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$tableName=str_replace('.','"."',$tableName); |
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$command .= "ALTER TABLE $tableName $enable TRIGGER ALL; "; |
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} |
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#enable to have ability to alter several tables |
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$this->db->pdo->setAttribute(\PDO::ATTR_EMULATE_PREPARES, true); |
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return $command; |
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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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* 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 $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 $column the name of the column to be changed. The name will be properly quoted by the method. |
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