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Posted to reviews@spark.apache.org by "jiang13021 (via GitHub)" <gi...@apache.org> on 2023/03/02 12:43:24 UTC
[GitHub] [spark] jiang13021 opened a new pull request, #40253: [SPARK-42553][SQL] Ensure at least one time unit after "interval"
jiang13021 opened a new pull request, #40253:
URL: https://github.com/apache/spark/pull/40253
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### What changes were proposed in this pull request?
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THis PR aims to ensure "at least one time unit should be given for interval literal" by modifying SqlBaseParser
### Why are the changes needed?
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INTERVAL is a Non-Reserved keyword in spark. But when I run
```shell
scala> spark.sql("select interval from mytable")
```
I get
```
org.apache.spark.sql.catalyst.parser.ParseException:
at least one time unit should be given for interval literal(line 1, pos 7)== SQL ==
select interval from mytable
-------^^^ at org.apache.spark.sql.errors.QueryParsingErrors$.invalidIntervalLiteralError(QueryParsingErrors.scala:196)
......
```
It is a bug because "Non-Reserved keywords" have a special meaning in particular contexts and can be used as identifiers in other contexts. So by design, INTERVAL can be used as a column name.
Currently the interval's grammar is
```
interval
: INTERVAL (errorCapturingMultiUnitsInterval | errorCapturingUnitToUnitInterval)?
;
```
There is no need to make the time unit nullable, we can ensure "at least one time unit should be given for interval literal" if the interval's grammar is
```
interval
: INTERVAL (errorCapturingMultiUnitsInterval | errorCapturingUnitToUnitInterval)
;
```
### Does this PR introduce _any_ user-facing change?
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No.
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Unit test: PlanParsserSuite."SPARK-42553: NonReserved keyword 'interval' can be column name"
Local test
```shell
scala> val myDF = spark.sparkContext.makeRDD(1 to 5).toDF("interval")
myDF: org.apache.spark.sql.DataFrame = [interval: int]
scala> myDF.createOrReplaceTempView("mytable")
scala> spark.sql("select interval from mytable;").show()
+--------+
|interval|
+--------+
| 1|
| 2|
| 3|
| 4|
| 5|
+--------+
```
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[GitHub] [spark] MaxGekk commented on pull request #40253: [SPARK-42553][SQL] Ensure at least one time unit after "interval"
Posted by "MaxGekk (via GitHub)" <gi...@apache.org>.
MaxGekk commented on PR #40253:
URL: https://github.com/apache/spark/pull/40253#issuecomment-1451830956
@jiang13021 Thank you for the backport. Could add the following, please:
1. The tag `[3.3]` to PR's title.
2. `This is a backport of https://github.com/apache/spark/pull/40195` to PR's description.
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[GitHub] [spark] jiang13021 commented on pull request #40253: [SPARK-42553][SQL][3.3] Ensure at least one time unit after "interval"
Posted by "jiang13021 (via GitHub)" <gi...@apache.org>.
jiang13021 commented on PR #40253:
URL: https://github.com/apache/spark/pull/40253#issuecomment-1451860426
> @jiang13021 Thank you for the backport. Could add the following, please:
>
> 1. The tag `[3.3]` to PR's title.
> 2. `This is a backport of https://github.com/apache/spark/pull/40195` to PR's description.
Done
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[GitHub] [spark] MaxGekk commented on pull request #40253: [SPARK-42553][SQL][3.3] Ensure at least one time unit after "interval"
Posted by "MaxGekk (via GitHub)" <gi...@apache.org>.
MaxGekk commented on PR #40253:
URL: https://github.com/apache/spark/pull/40253#issuecomment-1452051052
+1, LGTM. All GAs passed. Merging to 3.3.
Thank you, @jiang13021.
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[GitHub] [spark] MaxGekk closed pull request #40253: [SPARK-42553][SQL][3.3] Ensure at least one time unit after "interval"
Posted by "MaxGekk (via GitHub)" <gi...@apache.org>.
MaxGekk closed pull request #40253: [SPARK-42553][SQL][3.3] Ensure at least one time unit after "interval"
URL: https://github.com/apache/spark/pull/40253
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