Purpose
Specifies the maximum number of IN-lists in a single query that can use IN-list rewrite query processing.
Field Group
Performance
Valid Range
0 through 100
Default
2
Changes Take Effect
After the DBS Control Record has been written.
Usage Notes
Increasing the number of per-query IN-lists in rewrite processing requires more search space for join planning. Large values for MaxNumInListRewrite can lead to an increase in query parsing time. Teradata recommends that you keep this value under 10.
Setting this field to 0 effectively disables IN-list rewrite processing.
Related Topics
- For more information on large IN-list processing, see Teradata Vantage™ - SQL Request and Transaction Processing, B035-1142.
- For information on other DBS Control fields related to IN-list processing, see InListRewriteOption and InListRewriteThreshold.