GitHub user haohui opened a pull request:
https://github.com/apache/storm/pull/860
STORM-1159. Support nullable operations in StormSQL
This PR implements the support of the nullable semantics of the expressions
available in StormSQL.
It also implements the `IS_NULL`, `IS_NOT_NULL` operators.
Currently the `ExprCompiler` directly prints out Java source code with
`printf`. A cleaner approach is to introduce the `Expression` class in the
Apache Calcite project to avoid the printf statements. It'll be cleaned up in
follow-up PRs.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/haohui/storm STORM-1159
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/storm/pull/860.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #860
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commit 183b5ac926ad25b1c504c8822ebbdd236ecd0963
Author: Haohui Mai <[email protected]>
Date: 2015-11-03T23:06:22Z
Implement IS operators in StormSQL.
commit 8890de3e098b759d0a2938e06b4841d371066b7e
Author: Haohui Mai <[email protected]>
Date: 2015-11-04T17:24:32Z
Implement nullable semantics for AND, OR and NOT operators.
commit d11dabd25a7e4962a48b7d2682c319dac31acc3c
Author: Haohui Mai <[email protected]>
Date: 2015-11-04T21:48:40Z
STORM-1159. Support nullable operations in StormSQL.
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