Information générale
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Rushmore failing for most tags on one table
Versions des environnements
Got a really weird one here. I have a table from a client app where Rushmore is not kicking in for most of the tags. The table has over 100 fields. (I didn't design this; I inherited it.) There are 19 tags; 10 of them are filtered. Obviously, I'm not expecting those to help with optimization.
When I test queries with SYS(3054), only one of the other 9 tags contributes to optimization. That tag corresponds to the table's effective primary key (it's a regular tag, but it's the PK field). When I run a query that filters on any of the others, I get optimization of "None".
I've rebuilt all the tags from scratch. I also tried adding a tag on a previously unindexed field and using that in a WHERE clause. No optimization.
I've tried this with two different copies of the table in different folders with the same results.
I made a copy of the table and started indexing one tag at a time and optimization worked as I expected. I thought maybe the problem was the presence of the filtered tags, so I added one of those, and optimization still worked as I expected for the other tags.
Anybody seen anything like this before?
Tamar
Suivant
Répondre
Voir le fil de ce thread
Voir le fil de ce thread à partir de ce message seulement
Voir tous les messages de ce thread
Voir tous les messages de ce thread à partir de ce message seulement