AsterixDB changes for fixing issue873.
For example, in the following query plan, the change lets the optimizer recognize that $12 and $20 are equivalent.
Therefore, HASH_PARTITION_EXCHANGE [$$12] can be replaced by ONE_TO_ONE_EXCHANGE.
-- COMMIT |PARTITIONED|
project ([$$12])
-- STREAM_PROJECT |PARTITIONED|
exchange
-- ONE_TO_ONE_EXCHANGE |PARTITIONED|
delete from TinySocial:TweetMessages from %0->$$4 partitioned by [%0->$$12]
-- INSERT_DELETE |PARTITIONED|
exchange
-- ONE_TO_ONE_EXCHANGE |PARTITIONED|
materialize
-- MATERIALIZE |PARTITIONED|
exchange
-- HASH_PARTITION_EXCHANGE [$$12] |PARTITIONED|
assign [$$12] <- [function-call: asterix:field-access-by-index, Args:[%0->$$4, AInt32: {0}]]
-- ASSIGN |PARTITIONED|
project ([$$4])
-- STREAM_PROJECT |PARTITIONED|
assign [$$4] <- [function-call: asterix:open-record-constructor, Args:[AString: {tweetid}, %0->$$14, AString: {user}, function-call: asterix:field-access-by-index, Args:[%0->$$0, AInt32: {1}], AString: {sender-location}, function-call: asterix:field-access-by-index, Args:[%0->$$0, AInt32: {2}], AString: {send-time}, function-call: asterix:field-access-by-index, Args:[%0->$$0, AInt32: {3}], AString: {referred-topics}, function-call: asterix:field-access-by-index, Args:[%0->$$0, AInt32: {4}], AString: {message-text}, function-call: asterix:field-access-by-index, Args:[%0->$$0, AInt32: {5}]]]
-- ASSIGN |PARTITIONED|
exchange
-- ONE_TO_ONE_EXCHANGE |PARTITIONED|
unnest-map [$$14, $$0] <- function-call: asterix:index-search, Args:[AString: {TweetMessages}, AInt32: {0}, AString: {TinySocial}, AString: {TweetMessages}, ABoolean: {false}, ABoolean: {false}, ABoolean: {false}, AInt32: {1}, %0->$$20, AInt32: {1}, %0->$$21, TRUE, TRUE, TRUE]
-- BTREE_SEARCH |PARTITIONED|
exchange
-- ONE_TO_ONE_EXCHANGE |PARTITIONED|
assign [$$20, $$21] <- [AString: {15}, AString: {15}]
-- ASSIGN |PARTITIONED|
empty-tuple-source
-- EMPTY_TUPLE_SOURCE |PARTITIONED|
Change-Id: Ife8c378a62cdbbcd8c19b521de246162f1f3d6ec
Reviewed-on: https://asterix-gerrit.ics.uci.edu/267
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Wenhai Li <lwhaymail@yahoo.com>
Reviewed-by: Ildar Absalyamov <ildar.absalyamov@gmail.com>
diff --git a/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan b/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan
index 0a66ccb..e2e6dff 100644
--- a/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan
+++ b/asterix-app/src/test/resources/optimizerts/results/skip-index/dont-skip-primary-index-search-in-delete.plan
@@ -4,7 +4,7 @@
-- INSERT_DELETE |PARTITIONED|
-- ONE_TO_ONE_EXCHANGE |PARTITIONED|
-- MATERIALIZE |PARTITIONED|
- -- HASH_PARTITION_EXCHANGE [$$12] |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
-- ASSIGN |PARTITIONED|
-- STREAM_PROJECT |PARTITIONED|
-- ASSIGN |PARTITIONED|