When the SQL query contains a SELECT statement, the transformation returns one row for each database row it retrieves. You must configure an output port for each column in the SELECT statement. The output ports must be in the same order as the columns in the SELECT statement.
When you configure output ports for database columns, you need to configure the datatype of each database column you select. Select a native datatype from the list. When you select the native datatype, the Designer configures the transformation datatype for you.
The native datatype in the transformation must match the database column datatype. The Integration Service matches the column datatype in the database with the native database type in the transformation at run time. If the datatypes do not match, the Integration Service generates a row error.
Although the Teradata database allows Bigint columns, the Transformation Developer does not include Bigint datatype as one of the native datatypes you can use in the SQL transformation.
The following figure shows the ports in the transformation configured to run in query mode:
The input ports receive the data in the WHERE clause. The output ports return the columns from the SELECT statement. The SQL query selects name and address from the employees table. The SQL transformation writes a row to the target for each database row it retrieves.
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