Taewoo Kim created ASTERIXDB-1762:
-------------------------------------
Summary: AQL+ needs to be revised.
Key: ASTERIXDB-1762
URL: https://issues.apache.org/jira/browse/ASTERIXDB-1762
Project: Apache AsterixDB
Issue Type: Improvement
Reporter: Taewoo Kim
Assignee: Taewoo Kim
AQL+ is a super set of AQL (two differences: meta-variable and meta-clause),
and is used to transform the given plan using a rewritten AQL+ statements.
Using AQL+ to construct AQL+ statements and translate it to expressions and a
plan, the sub plan of the given operator as well as the operator itself can be
transformed into a new plan.
Currently, AQL+ is not synced with AQL grammar. Actually, it only uses a
certain portion of AQL constructs in one rule - FuzzyJoinRule. Since AQL+ is a
super set of AQL and the concepts (meta-variable and meta-clause) of AQL+ is
not used by other AQL constructs, I think we can integrate AQL and AQL+.
1) Integrate AQL and AQL+
Then, we do not need to maintain separate grammar and ExpressionToPlan
Translator. And since normal AQL grammar doesn't interfere with AQL+ grammar
(we never expose the AQL+ grammar to the user level). Currently, FuzzyJoin
requires AQL+ functionality to build the transformed plan. Unless we want to
introduce the massive number of operators in hand in the plan, I think it's
better remove separate grammar and integrate it with AQL.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
