maropu commented on issue #27651: [SPARK-30903][SQL] Fail fast on duplicate
columns when analyze columns
URL: https://github.com/apache/spark/pull/27651#issuecomment-590014317
Thanks! Merged to master/3.0!
Just in case, I've checked that pgSQL has the same behaivour;
```
postgres=# \d t
Table "public.t"
Column | Type | Collation | Nullable | Default
+-+---+--+-
k | integer | | |
v | integer | | |
postgres=# analyze t (k, k);
ERROR: column "k" of relation "t" appears more than once
```
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