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Harish Butani updated HIVE-7324: -------------------------------- Attachment: HIVE-7324.1.patch > CBO: provide a mechanism to test CBO features based on table stats only (w/o > table data) > ---------------------------------------------------------------------------------------- > > Key: HIVE-7324 > URL: https://issues.apache.org/jira/browse/HIVE-7324 > Project: Hive > Issue Type: Sub-task > Reporter: Harish Butani > Assignee: Harish Butani > Attachments: HIVE-7324.1.patch > > > Since lot of the CBO work is focused on planning, it will be nice to be able > to run explain query to test CBO features. TPCDS has a rich enough schema and > query set. So the patch loads a dump TPCDS(Scale 10000) stats. > 1. TestCBO shows a way to load stats from a dump and run explain on a tpcds > query. The output is currently dumped to Sys.out. This can be improved by > hooking to QTestUtil, but hopefully this is a good start. > 2. Uncovered couple of issues in the process of testing this: > a) PartitionPruner fails on 'true' constants. For e.g. you will get an error > for > {code} > select * from t where partCol < 100 and true > {code} > This gets exposed because the predicates coming out of Optiq can contain > 'true' predicates. > b) OpTraitsRulesProcFactory:checkBucketedTable checks that number of files = > numBuckets. This fails because there are no dataFiles. So I have altered it > to catch exceptions and assume bucketMapJoinConvertible = false if an > exception is encountered here. > Uploading with these changes in this patch for now. Will carve them out as > separate patches. > [~ashutoshc], [~hagleitn] can you please take a look. -- This message was sent by Atlassian JIRA (v6.2#6252)