I have worked on several warehouses and have found that host/4GL languages have a difficult time in performance compared to the inherent internal database processing that a high-performance database stored procedures can offer... even embedded SQL is no match. If a tool can save development time but suffers host/4GL language performance issues, is the development time saved really worth it? For example, in a terabyte database I saw an embedded SQL loading process that took 18 hours reduced to 3 hours using stored procedures direct bulk loading and parallel query options that external languages could not match.
Sid Adelman's Answer: It's going to depend on the size of your tables, how often they are loaded, your load windows and then the savings in the development and maintenance using a product that improves the productivity of those developing the extract, transform and load.
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