MaxGekk opened a new pull request #30615:
URL: https://github.com/apache/spark/pull/30615
### What changes were proposed in this pull request?
Preprocess the partition spec passed to the V1 SHOW PARTITIONS
implementation `ShowPartitionsCommand`, and normalize the passed spec according
to the partition columns w.r.t the case sensitivity flag
**spark.sql.caseSensitive**.
### Why are the changes needed?
V1 SHOW PARTITIONS is case sensitive in fact, and doesn't respect the SQL
config **spark.sql.caseSensitive** which is false by default, for instance:
```sql
spark-sql> CREATE TABLE tbl1 (price int, qty int, year int, month int)
> USING parquet
> PARTITIONED BY (year, month);
spark-sql> INSERT INTO tbl1 PARTITION(year = 2015, month = 1) SELECT 1, 1;
spark-sql> SHOW PARTITIONS tbl1 PARTITION(YEAR = 2015, Month = 1);
Error in query: Non-partitioning column(s) [YEAR, Month] are specified for
SHOW PARTITIONS;
```
### Does this PR introduce _any_ user-facing change?
Yes. After the changes, the command above works as expected:
```sql
spark-sql> SHOW PARTITIONS tbl1 PARTITION(YEAR = 2015, Month = 1);
year=2015/month=1
```
### How was this patch tested?
By running the affected test suites:
- `v1/ShowPartitionsSuite`
- `v2/ShowPartitionsSuite`
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