SET ansinull { On | Off }   The default behavior for comparing values to NULL is different in SQL Anywhere and Adaptive Server Enterprise. Setting ansinull to Off provides Transact-SQL compatible comparisons with NULL.

SQL Anywhere also supports the following syntax:

SET ansi_nulls { On | Off }

For more information, see ansinull option.

SET ansi_permissions { On | Off }   The default behavior is different in SQL Anywhere and Adaptive Server Enterprise regarding permissions required to perform an UPDATE or DELETE containing a column reference. Setting ansi_permissions to Off provides Transact-SQL-compatible permissions on UPDATE and DELETE.

SET close_on_endtrans { On | Off }   The default behavior is different in SQL Anywhere and Adaptive Server Enterprise for closing cursors at the end of a transaction. Setting close_on_endtrans to Off provides Transact-SQL compatible behavior.

SET datefirst { 1 | 2 | 3 | 4 | 5 | 6 | 7 }   The default is 7, which means that the first day of the week is by default Sunday.

SET quoted_identifier { On | Off }   Controls whether strings enclosed in double quotes are interpreted as identifiers (On) or as literal strings (Off).

SET rowcount   integer The Transact-SQL ROWCOUNT option limits the number of rows fetched for any cursor to the specified integer. This includes rows fetched by re-positioning the cursor. Any fetches beyond this maximum return a warning. The option setting is considered when returning the estimate of the number of rows for a cursor on an OPEN request.

SET ROWCOUNT also limits the number of rows affected by a searched UPDATE or DELETE statement to integer. This might be used, for example, to allow COMMIT statements to be performed at regular intervals to limit the size of the rollback log and lock table. The application (or procedure) would need to provide a loop to cause the update/delete to be re-issued for rows that are not affected by the first operation. A simple example is given below:

BEGIN
   DECLARE @count INTEGER
   SET rowcount 20
   WHILE(1=1) BEGIN
      UPDATE Employees SET Surname='new_name'
      WHERE Surname <> 'old_name'
      /* Stop when no rows changed */
      SELECT @count = @@rowcount
      IF @count = 0 BREAK
      PRINT string('Updated ',
               @count,' rows; repeating...')
      COMMIT
   END
   SET rowcount 0
END

In SQL Anywhere, if the ROWCOUNT setting is greater than the number of rows that Interactive SQL can display, Interactive SQL may do some extra fetches to reposition the cursor. So, the number of rows actually displayed may be less than the number requested. Also, if any rows are re-fetched due to truncation warnings, the count may be inaccurate.

A value of zero resets the option to get all rows.

SET self_recursion { On | Off }   The self_recursion option is used within triggers to enable (On) or prevent (Off) operations on the table associated with the trigger from firing other triggers.

SET string_rtruncation { On | Off }   The default behavior is different between SQL Anywhere and Adaptive Server Enterprise when non-space characters are truncated during assignment of SQL string data. Setting string_rtruncation to On provides Transact-SQL-compatible string comparisons.

SET textsize   Specifies the maximum size (in bytes) of TEXT or IMAGE type data to be returned with a SELECT statement. The @@textsize global variable stores the current setting. To reset to the default size (32 KB), use the command:

set textsize 0

SET transaction isolation level { 0 | 1 | 2 | 3 | snapshot | statement snapshot | readonly statement snapshot }   Sets the locking isolation level for the current connection.

For Adaptive Server Enterprise, only 1 and 3 are valid options. For SQL Anywhere, any of 0, 1, 2, 3, snapshot, statement snapshot, and read only statement snapshot is a valid option.

SQL/2008   Transact-SQL extension.