Hi, I need to evaluate an _expression_ that I have stored in a table, and not sure how to force evaluation of a column value. Some background. This is a generic testing application that we’re using to test source to target ETL’s. The specifics of the test _expression_ depend on the actual tables involved. Typicallly it’s been table_a.col_a = table_b.col_b but now they want to use inequality or other operators. The tester’s define the test criteria in a table, then we use that criteria to actually score the runtime results. In my design I have 3 tables. Test – stores the test definition Testrun – stores the actual sql for a specific execution of a test Testscore – stores the actual values of the source and target values. The scores are stored in different rows, with a common name to allow them to be matched in the query. The pass/fail query looks something like this Update testscore Set metricstatus = case when table_a.col_a = table_b.col_b then ‘PASS’ else ‘FAIL’ end .. Where testrunid=x I want to replace the table_a.col_a = table_b.col_b with the _expression_ stored in the test table and evaluate. I’m thinking – it’s dynamic sql, so I need to build the statement and then evaluate using a function. Anybody have any comments? Thanks Doug Little Sr. Data Warehouse Architect | Business Intelligence Architecture | Orbitz Worldwide 500 W. Madison, Suite 1000 Chicago IL 60661| Office 312.260.2588 | Fax 312.894.5164 | Cell 847-997-5741 |
