cty123 opened a new pull request, #52988:
URL: https://github.com/apache/spark/pull/52988
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### What changes were proposed in this pull request?
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This PR aims to do a minor correction on the current get* functions from
`SparkConnectResultSet` class. As previously discussed in the PR
https://github.com/apache/spark/pull/52947,
>1. For every getter function, if the statement is closed, the ResultSet
should be unusable. I have verified this with MySQL driver and Postgresql
driver.
>
>2. Right now when index goes out of bound, it throws
`java.lang.ArrayIndexOutOfBoundsException`, but based on the specification on
`java.sql.ResultSet` which is implemented by `SparkConnectResultSet` class, it
should throw `java.sql.SQLException`
>
>```
> * @throws SQLException if the columnIndex is not valid;
>```
This PR proposes a unified wrapper function called `getField(columnIndex:
Int)` that aims to wrap the `checkOpen` as well as the index boundary check.
### Why are the changes needed?
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Currently the get* functions don't follow the expected behaviors of
`java.sql.ResultSet`. It's technically not a big problem, but since the
`SparkConnectResultSet` aims to implement the `java.sql.ResultSet` class, it
should strictly follow the specification documented on the interface definition.
### Does this PR introduce _any_ user-facing change?
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This PR is a small fix related to a new feature introduced recently.
### How was this patch tested?
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I added 2 tests each covering a bullet point I named above. These 2
functions calls all the get* functions inside `SparkConnectResultSet` class to
make sure the correct exception(java.sql.SQLException) is thrown.
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No
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