Jiecheng Zhao created IMPALA-6398:
-------------------------------------
Summary: Can we add comment in select list
Key: IMPALA-6398
URL: https://issues.apache.org/jira/browse/IMPALA-6398
Project: IMPALA
Issue Type: Wish
Components: Frontend
Reporter: Jiecheng Zhao
When we working, we always write code like
'''
CREATE TABLE xxxx AS
SELECT
exp_of_a item_a - comment for a
, exp_of_b item_b - comment for b
, exp_of_c item_c - comment for c
FROM ...
'''.
Can we capture the comments of the item or design some syntax at these place
and add these info to table column comment naturally? (instead of adding
comment separately in current syntax)
I have looked at the source code and found we should have nothing like this now.
[https://github.com/cloudera/Impala/blob/114ac271fa4ac991d7c3392128354c0d056cb975/fe/src/main/cup/sql-parser.cup#L2301]
h2.
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