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https://issues.apache.org/jira/browse/ASTERIXDB-1285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202420#comment-15202420
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Ildar Absalyamov commented on ASTERIXDB-1285:
---------------------------------------------
Fixed in stats branch
> Introduce index rewrite does not properly handle conjunctive predicates
> -----------------------------------------------------------------------
>
> Key: ASTERIXDB-1285
> URL: https://issues.apache.org/jira/browse/ASTERIXDB-1285
> Project: Apache AsterixDB
> Issue Type: Bug
> Reporter: Ildar Absalyamov
> Assignee: Ildar Absalyamov
> Priority: Minor
>
> The following query with a conjunctive predicate produces incorrect B-tree
> search argument
> {noformat}
> drop dataverse tpch if exists;
> create dataverse tpch;
> use dataverse tpch;
> create type OrderType as open {
> o_orderkey: int32,
> o_custkey: int32,
> o_orderstatus: string,
> o_totalprice: double,
> o_orderdate: string,
> o_orderpriority: string,
> o_clerk: string,
> o_shippriority: int32,
> o_comment: string
> }
> create dataset Orders(OrderType) primary key o_orderkey;
> for $o in dataset('Orders')
> where $o.o_orderkey >=int32("0") and $o.o_orderkey < "foo"
> order by $o.o_orderkey
> return $o
> {noformat}
> Incorrect query plan:
> {noformat}
> distribute result [%0->$$0]
> -- DISTRIBUTE_RESULT |PARTITIONED|
> exchange
> -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
> project ([$$0])
> -- STREAM_PROJECT |PARTITIONED|
> exchange
> -- SORT_MERGE_EXCHANGE [$$10(ASC) ] |PARTITIONED|
> unnest-map [$$10, $$0] <- function-call: asterix:index-search,
> Args:[AString: {Orders}, AInt32: {0}, AString: {tpch}, AString: {Orders},
> ABoolean: {false}, ABoolean: {false}, ABoolean: {false}, AInt32: {1},
> %0->$$12, AInt32: {1}, %0->$$13, TRUE, FALSE, FALSE]
> -- BTREE_SEARCH |PARTITIONED|
> exchange
> -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
> assign [$$12, $$13] <- [AInt32: {0}, AString: {foo}]
> -- ASSIGN |PARTITIONED|
> empty-tuple-source
> -- EMPTY_TUPLE_SOURCE |PARTITIONED|
> {noformat}
> The correct query plan should have created a search argument on the first
> part of conjunctive predicate and leave selectOp to filter out the second
> part.
> This happens because introduce index rewrite rule only considers first part
> of conjunctive predicate to determine the index applicability
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