ON COMMIT clause
By default, the rows of a temporary table are deleted on a COMMIT. You can use the ON COMMIT clause to preserve rows
on a COMMIT.
NOT TRANSACTIONAL clause
A table created using this clause is not affected by either COMMIT or ROLLBACK. The NOT TRANSACTIONAL clause provides
performance improvements in some circumstances because operations on non-transactional temporary tables do not cause entries
to be made in the rollback log. For example, NOT TRANSACTIONAL can be useful if procedures that use the temporary table are
called repeatedly with no intervening COMMITs or ROLLBACKs.
You cannot use the REFERENCES column-constraint or the FOREIGN KEY table-constraint on a local temporary table.
The DECLARE LOCAL TEMPORARY TABLE statement declares a temporary table.
Tables created using DECLARE LOCAL TEMPORARY TABLE do not appear in the SYSTABLE view of the system catalog.
The rows of a declared temporary table are deleted when the table is explicitly dropped or when the table goes out of scope.
You can also explicitly delete rows using TRUNCATE or DELETE.
Declared local temporary tables within compound statements exist within the compound statement. Otherwise, the declared local
temporary table exists until the end of the connection.
Two local temporary tables within the same scope cannot have the same name. If you create temporary table with the same name
as a base table, the base table only becomes visible within the connection once the scope of the local temporary table ends.
A connection cannot create a base table with the same name as an existing temporary table.
If you want a procedure to create a local temporary table that persists after the procedure completes, use the CREATE LOCAL
TEMPORARY TABLE statement instead.
DECLARE LOCAL TEMPORARY TABLE is part of optional language feature F531 of the SQL/2008 standard. The PCTFREE and NOT
TRANSACTIONAL clauses are vendor extensions. The column and constraint definitions defined by the statement may also include
vendor extension syntax. In SQL/2008, the standard stipulates that tables created via the DECLARE LOCAL TEMPORARY TABLE statement
appear in the system catalog; this is not the case with SQL Anywhere.
DECLARE LOCAL TEMPORARY TABLE is not supported by Adaptive Server Enterprise. In Sybase Adaptive Server Enterprise, one
creates a temporary table using the CREATE TABLE statement with a table name that begins with the special character #.