dtenedor opened a new pull request, #36415:
URL: https://github.com/apache/spark/pull/36415
## What changes were proposed in this pull request?
DEFAULT columns are now supported in UPDATE commands.
Example:
```
CREATE TABLE t(
i STRING,
c CHAR(5),
d VARCHAR(5),
e STRING DEFAULT 'abc',
f BIGINT DEFAULT 42)
USING DELTA;
INSERT INTO t VALUES('1', '12345', '67890', 'def', 31);
UPDATE t SET c = DEFAULT WHERE i = '1';
SELECT * FROM t;
> "1", NULL, "67890", "def", 31
UPDATE t SET e = DEFAULT WHERE i = '1';
SELECT * FROM t;
> "1", NULL, "67890", "abc", 31
UPDATE t SET e = 'ghi' WHERE i = '1';
SELECT * FROM t;
> "1", NULL, "67890", "ghi", 31
```
### Why are the changes needed?
This makes UPDATE commands easier to use.
### Does this PR introduce _any_ user-facing change?
Yes.
## How was this patch tested?
This PR adds new unit test coverage.
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