JoshRosen opened a new pull request, #36814:
URL: https://github.com/apache/spark/pull/36814
### What changes were proposed in this pull request?
This PR improves the error message that is thrown when trying to run `SHOW
CREATE TABLE` on a Hive table with an unsupported serde. Currently this results
in an error like
```
org.apache.spark.sql.AnalysisException: Failed to execute SHOW CREATE TABLE
against table rcFileTable, which is created by Hive and uses the following
unsupported serde configuration
SERDE: org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe
INPUTFORMAT: org.apache.hadoop.hive.ql.io.RCFileInputFormat OUTPUTFORMAT:
org.apache.hadoop.hive.ql.io.RCFileOutputFormat
```
This patch improves this error message by adding a suggestion to use `SHOW
CREATE TABLE ... AS SERDE`:
```
org.apache.spark.sql.AnalysisException: Failed to execute SHOW CREATE TABLE
against table rcFileTable, which is created by Hive and uses the following
unsupported serde configuration
SERDE: org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe
INPUTFORMAT: org.apache.hadoop.hive.ql.io.RCFileInputFormat OUTPUTFORMAT:
org.apache.hadoop.hive.ql.io.RCFileOutputFormat
Please use `SHOW CREATE TABLE rcFileTable AS SERDE` to show Hive DDL instead.
```
### Why are the changes needed?
The existing error message is confusing.
### Does this PR introduce _any_ user-facing change?
Yes, it improves a user-facing error message.
### How was this patch tested?
Manually tested with
```
CREATE TABLE rcFileTable(i INT)
ROW FORMAT SERDE
'org.apache.hadoop.hive.serde2.columnar.LazyBinaryColumnarSerDe'
STORED AS INPUTFORMAT 'org.apache.hadoop.hive.ql.io.RCFileInputFormat'
OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.RCFileOutputFormat'
SHOW CREATE TABLE rcFileTable
```
to trigger the error.
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