User's Guide
   PART 5. The Adaptive Server Family
     CHAPTER 31. Adaptive Server Anywhere as an Open Server       

Characteristics of Open Client and jConnect connections

When Adaptive Server Anywhere is serving applications over TDS, it automatically sets relevant database options to values that are compatible with Adaptive Server Enterprise default behavior. These options are set temporarily, for the duration of the connection only. They can be overridden by the client application at any time.

Default settings 

The database options that are set on connection using TDS are as follows:

Option	Set to
ALLOW_NULLS_BY_DEFAULT	OFF
ANSINULL	OFF
ANSI_BLANKS	ON
ANSI_INTEGER_OVERFLOW	ON
AUTOMATIC_TIMESTAMP	ON
CHAINED	OFF
CONTINUE_AFTER_RAISERROR	ON
DATE_FORMAT	YYYY-MM-DD
DATE_ORDER	MDY
ESCAPE_CHARACTER	OFF
ISOLATION_LEVEL	1
FLOAT_AS_DOUBLE	ON
QUOTED_IDENTIFIER	OFF
TIME_FORMAT	HH:NN:SS.SSS
TIMESTAMP_FORMAT	YYYY-MM-DD HH:NN:SS.SSS
TSQL_HEX_CONSTANT	ON
TSQL_VARIABLES	ON

How the startup options are set 

The default database options are set for TDS connections using a system procedure named sp_tsql_environment. This procedure sets the following options:

SET TEMPORARY OPTION TSQL_VARIABLES='ON';
SET TEMPORARY OPTION ANSI_BLANKS='ON';
SET TEMPORARY OPTION TSQL_HEX_CONSTANT='ON';
SET TEMPORARY OPTION CHAINED='OFF';
SET TEMPORARY OPTION QUOTED_IDENTIFIER='OFF';
SET TEMPORARY OPTION ALLOW_NULLS_BY_DEFAULT='OFF';
SET TEMPORARY OPTION AUTOMATIC_TIMESTAMP='ON';
SET TEMPORARY OPTION ANSINULL='OFF';
SET TEMPORARY OPTION CONTINUE_AFTER_RAISERROR='ON';
SET TEMPORARY OPTION FLOAT_AS_DOUBLE='ON';
SET TEMPORARY OPTION ISOLATION_LEVEL='1';
SET TEMPORARY OPTION DATE_FORMAT='YYYY-MM-DD';
SET TEMPORARY OPTION TIMESTAMP_FORMAT='YYYY-MM-DD HH:NN:SS.SSS';
SET TEMPORARY OPTION TIME_FORMAT='HH:NN:SS.SSS';
SET TEMPORARY OPTION DATE_ORDER='MDY';
SET TEMPORARY OPTION ESCAPE_CHARACTER='OFF' 

The procedure only sets options for connections that use the TDS communications protocol. This includes Open Client and JDBC connections using jConnect. Other connections (ODBC and Embedded SQL) have the default settings for the database.

You can change the options for TDS connections as follows:

  To change the option settings for TDS connections:

1. Create a procedure that sets the database options you want. For example, you could use a procedure such as the following:

   CREATE PROCEDURE my_startup_procedure()
   BEGIN
     IF connection_property('CommProtocol')='TDS' THEN
       SET TEMPORARY OPTION QUOTED_IDENTIFIER='OFF';
     END IF
   END

   This procedure changes only the QUOTED_IDENTIFIER option from the default settings.

2. Set the LOGIN_PROCEDURE option to the name of a new procedure:

   SET OPTION LOGIN_PROCEDURE= 'dba.my_startup_procedure'

3. Future connections will use the procedure.

     For more information about database options, see Database Options.

Data type mappings 

If you are developing Open Client applications, you should be aware of mappings between the data types supported by Adaptive Server Anywhere and those expected by Open Client.

     For more information about these data type mappings, see Data type mappings.