INSERT cursors

Informix®

Informix provides insert cursors to optimize row creation in a database. An insert cursor is declared as a cursor, and rows as added with the PUT instruction. The rows are buffered and sent to the database server when executing a FLUSH instruction, or when the cursor is closed with CLOSE. When using transactions in Informix, the OPEN, PUT and FLUSH instructions must be executed within a transaction block.

DECLARE c1 CURSOR FOR INSERT INTO tab1 ...
BEGIN WORK
OPEN c1
WHILE ...
   PUT c1 USING var-list
END WHILE
CLOSE c1
COMMIT WORK

PostgreSQL

PostgreSQL does not support insert cursors.

Solution

Insert cursors are emulated by the database interface, using basic INSERT SQL instructions.

The performances might be not as good as with Informix, but the feature is fully supported.