Christopher Channing has posted comments on this change.

Change subject: IMPALA-3938: Prevent illegal implicit collection references 
being used.
......................................................................


Patch Set 1:

(3 comments)

I made the changes that you requested.

http://gerrit.cloudera.org:8080/#/c/4079/1/fe/src/main/java/com/cloudera/impala/analysis/Path.java
File fe/src/main/java/com/cloudera/impala/analysis/Path.java:

Line 232:           if (!structType.isMapType() && field.getType() instanceof 
MapType) {
> how could structType every be a map type? do you mean to call isMapStruct()
Sorry, not sure how I missed that. I tried out your suggestion, but it did not 
catch the following broken query: "select key from test_table.locations" (same 
behaviour that the bug exhibits). For this broken scenario, the flag @ L219 
could be set if the type is a collection and we look at the optional type, but 
it would mean duplicating a little code to recreate the structure (in order to 
get the optional field). Instead of that approach, I've reworked this a little 
to populate expectExplicitMatch inside the loop when we're dealing with a 
hierarchy of nested collections.


http://gerrit.cloudera.org:8080/#/c/4079/1/fe/src/test/java/com/cloudera/impala/analysis/AnalyzeStmtsTest.java
File fe/src/test/java/com/cloudera/impala/analysis/AnalyzeStmtsTest.java:

Line 438:     // Array of structs and maps with name conflicts. Both implicit 
and explicit
> your new tests don't really belong in this test 'cluster' because there are
Done


Line 467:         "Could not resolve column/field reference: 'm.value'");    
> whitespace
Done


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Gerrit-MessageType: comment
Gerrit-Change-Id: I703c7e9c8c9c95c9fee714767367373eec10cd0c
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Christopher Channing <[email protected]>
Gerrit-Reviewer: Alex Behm <[email protected]>
Gerrit-Reviewer: Christopher Channing <[email protected]>
Gerrit-HasComments: Yes

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