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Yingyi Bu <yingyi@couchbase.com>
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on 15 Aug 16
Clean up GROUP BY and WITH clause.
- fix ASTERIXDB-971, i.e., the expression to plan translator for FLWOGR without a "for";
- fix the scopin… Show more
Clean up GROUP BY and WITH clause.

- fix ASTERIXDB-971, i.e., the expression to plan translator for FLWOGR without a "for";

- fix the scoping for nested WITH clause;

- fix the scoping for nested GROUP BY clause;

- fix default fields in group variables;

- fix/unify the expression substition AST visitor;

- enhance RemoveUnusedAssignAndAggregateRule to be able to remove unused GROUP BY

 decoration varaibles;

- clearly sperate SQL++ aggregate functions and SQL-92 aggregate functions, i.e.,

 SQL-92 aggregate sugars cannot apply to SQL++ aggregate functions;

- fix PushAggregateIntoGroupbyRule for nested plan deletions;

- enhance RemoveCartesianProductWithEmptyBranchRule;

- add ExtractGroupByDecorVariablesRule;

- add an aggregate function first-element;

- fix ASTERIXDB-1560, an error message issue.

Change-Id: I62fca7f937aa007d97ed87c75cef19f6aa3e5ade

Reviewed-on: https://asterix-gerrit.ics.uci.edu/1050

Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>

Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>

Reviewed-by: Till Westmann <tillw@apache.org>

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