Joe McDonnell has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/21194 )

Change subject: IMPALA-12934: Added Calcite parsing files to Impala
......................................................................

IMPALA-12934: Added Calcite parsing files to Impala

Adding the framework to create our own parsing syntax for Impala using
the base Calcite Parser.jj file.

The Parser.jj file here was grabbed from Calcite 1.36. So with this commit,
we are using the same parsing analysis as Calcite 1.36. Any changes made
on top of the Parser.jj file or the config.fmpp file in the future are Impala
specific changes, so a diff can be done from this commit to see all the Impala
parsing changes.

The config.fmpp file was grabbed from Calcite 1.36 default_config.fmpp. The
Calcite intention of the config.fmpp file is to allow markup of variables in
the Parser.jj file. So it is always preferable to modify the
default_config.fmpp file when possible. Our version is grabbed from
https://github.com/apache/calcite/blob/main/core/src/main/codegen/config.fmpp
and slightly modified with the class name to make it compile for Impala.

There's no unit test needed since there is no functional change. The Calcite
planner will eventually make changes in the ".jj" file to support the 
differences
between the Impala parser and the Calcite parser.
Change-Id: If756b5ea8beb85661a30fb5d029e74ebb6719767
Reviewed-on: http://gerrit.cloudera.org:8080/21194
Tested-by: Impala Public Jenkins <[email protected]>
Reviewed-by: Joe McDonnell <[email protected]>
---
M java/calcite-planner/pom.xml
A java/calcite-planner/src/main/codegen/config.fmpp
A java/calcite-planner/src/main/codegen/templates/Parser.jj
M 
java/calcite-planner/src/main/java/org/apache/impala/calcite/service/CalciteQueryParser.java
4 files changed, 9,616 insertions(+), 1 deletion(-)

Approvals:
  Impala Public Jenkins: Verified
  Joe McDonnell: Looks good to me, approved

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: If756b5ea8beb85661a30fb5d029e74ebb6719767
Gerrit-Change-Number: 21194
Gerrit-PatchSet: 11
Gerrit-Owner: Steve Carlin <[email protected]>
Gerrit-Reviewer: Aman Sinha <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>
Gerrit-Reviewer: Steve Carlin <[email protected]>

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