DEALLOCATE
DEALLOCATE — deallocate a prepared statement
Synopsis
DEALLOCATE [ PREPARE ] { name | ALL }
Description
DEALLOCATE is used to deallocate a previously prepared SQL statement. If you do not explicitly deallocate a prepared statement, it is deallocated when the session ends.
For more information on prepared statements, see PREPARE.
Parameters
PREPARE-
This key word is ignored.
name-
The name of the prepared statement to deallocate.
ALL-
Deallocate all prepared statements.
Compatibility
The SQL standard includes a DEALLOCATE statement, but it is only for use in embedded SQL.
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https://www.postgresql.org/docs/12/sql-deallocate.html