Setting length for a column in the schema
You can use the length setting of a schema for the following two purposes. 
      - Setting the length of a table column when creating a database table.
 - Validating incoming data through tSchemaComplianceCheck.
 
This section gives an example of using the length setting in a schema to set the length of a column of a database table. For more information about using tSchemaComplianceCheck to validate data, see Validating data.