Creating Models › Creating a Physical Model › Scripts › Schema Script Example

Schema Script Example

The following example shows how you can use a macro in a schema script to drop existing tables before the schema is generated on a Sybase target server:

%ForEachTable() {
if exists (select * from sysobjects 
 where id = object_id('dbo.%tablename') and sysstat & 0xf = 3)
 drop table dbo.%tablename

GO

}

The expanded code is generated and executed with the GO statement during schema generation:

if exists (select * from sysobjects 
 where id = object_id('dbo.MOVIE_RENTAL_RECORD') and sysstat & 0xf = 3)
 drop table dbo.MOVIE_RENTAL_RECORD

GO

if exists (select * from sysobjects 
 where id = object_id('dbo.MOVIE') and sysstat & 0xf = 3)
 drop table dbo.MOVIE

GO

if exists (select * from sysobjects 
 where id = object_id('dbo.MOVIE_COPY') and sysstat & 0xf = 3)
 drop table dbo.MOVIE_COPY

GO

if exists (select * from sysobjects 
 where id = object_id('dbo.CUSTOMER') and sysstat & 0xf = 3)
 drop table dbo.CUSTOMER

GO