replicateattunity

Alter CLOB without SOURCE_LOOKUP

I am attempting to alter CLOB data to STRING(3999) row by row in a table. I am currently using SUBSTR([fieldname],1,3999), however when checking the result table against the source table it shows a NULL result despite data existing within the source.

Using:

substr(source_lookup(1,[SCHEMA],[TABLE],[FIELD],[KEYDEFS],[KEYS]),1,3900)

works, however it alters the processing time from 5 minutes to just shy of 2 hours.

Solution

  • Attunity provided workaround for this issue is as follows:

    Create a secondary task, specifically loading just the key fields and the CLOB data. When this is ported into the staging area a view should be created using DBMS_LOB.SUBSTR() to convert it. Compose can then match the ETL set to the view via a lookup matching on the keys.