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[SPARK-19472][SQL] Parser should not mistake CASE WHEN(...) for a function call - #16821
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hvanhovell wants to merge 1 commit into
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[SPARK-19472][SQL] Parser should not mistake CASE WHEN(...) for a function call#16821hvanhovell wants to merge 1 commit into
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dongjoon-hyun
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Feb 6, 2017
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+1 |
SparkQA
commented
Feb 6, 2017
Test build #72454 has finished for PR 16821 at commit
|
gatorsmile
commented
Feb 6, 2017
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LGTM |
| assertEqual("case when a = 1 then b when a = 2 then c else d end", | ||
| CaseWhen(Seq(('a === 1, 'b.expr), ('a === 2, 'c.expr)), 'd)) | ||
| assertEqual("case when (1) + case when a > b then c else d end then f else g end", | ||
| CaseWhen(Seq((Literal(1) + CaseWhen(Seq(('a > 'b, 'c.expr)), 'd.expr), 'f.expr)), 'g)) |
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To other reviewers: before the fix, if users do not put round brackets ( ), it works well. For example, case when 1 + case when a > b then c else d end then f else g end
asfgit pushed a commit
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Feb 6, 2017
…ction call ## What changes were proposed in this pull request? The SQL parser can mistake a `WHEN (...)` used in `CASE` for a function call. This happens in cases like the following: ```sql select case when (1) + case when 1 > 0 then 1 else 0 end = 2 then 1 else 0 end from tb ``` This PR fixes this by re-organizing the case related parsing rules. ## How was this patch tested? Added a regression test to the `ExpressionParserSuite`. Author: Herman van Hovell <hvanhovell@databricks.com> Closes#16821 from hvanhovell/SPARK-19472. (cherry picked from commit cb2677b) Signed-off-by: gatorsmile <gatorsmile@gmail.com>
asfgit pushed a commit
that referenced
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Feb 6, 2017
…ction call ## What changes were proposed in this pull request? The SQL parser can mistake a `WHEN (...)` used in `CASE` for a function call. This happens in cases like the following: ```sql select case when (1) + case when 1 > 0 then 1 else 0 end = 2 then 1 else 0 end from tb ``` This PR fixes this by re-organizing the case related parsing rules. ## How was this patch tested? Added a regression test to the `ExpressionParserSuite`. Author: Herman van Hovell <hvanhovell@databricks.com> Closes#16821 from hvanhovell/SPARK-19472. (cherry picked from commit cb2677b) Signed-off-by: gatorsmile <gatorsmile@gmail.com>
gatorsmile
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Feb 6, 2017
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Thanks! Merging to master/2.1/2.0 |
cmonkey pushed a commit
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Feb 15, 2017
…ction call ## What changes were proposed in this pull request? The SQL parser can mistake a `WHEN (...)` used in `CASE` for a function call. This happens in cases like the following: ```sql select case when (1) + case when 1 > 0 then 1 else 0 end = 2 then 1 else 0 end from tb ``` This PR fixes this by re-organizing the case related parsing rules. ## How was this patch tested? Added a regression test to the `ExpressionParserSuite`. Author: Herman van Hovell <hvanhovell@databricks.com> Closesapache#16821 from hvanhovell/SPARK-19472.
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What changes were proposed in this pull request?
The SQL parser can mistake a
WHEN (...)used inCASEfor a function call. This happens in cases like the following:This PR fixes this by re-organizing the case related parsing rules.
How was this patch tested?
Added a regression test to the
ExpressionParserSuite.