stefankandic opened a new pull request, #53609:
URL: https://github.com/apache/spark/pull/53609
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### What changes were proposed in this pull request?
Catching the case in `ToNumberParser` when the input string only consists of
whitespace, preventing a failure with an internal error later on when creating
`BigDecimal`.
### Why are the changes needed?
Without this change passing an empty string (`select try_to_number('',
'99')`) would fail with the following exception:
```
JVM stacktrace:
java.lang.NumberFormatException
at java.base/java.math.BigDecimal.(BigDecimal.java:692)
at java.base/java.math.BigDecimal.(BigDecimal.java:471)
at java.base/java.math.BigDecimal.(BigDecimal.java:900)
at
org.apache.spark.sql.catalyst.util.ToNumberParser.parseResultToDecimalValue(ToNumberParser.scala:627)
at
org.apache.spark.sql.catalyst.util.ToNumberParser.parse(ToNumberParser.scala:499)
```
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
New unit tests.
### Was this patch authored or co-authored using generative AI tooling?
No.
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