nebojsa-db opened a new pull request, #47180:
URL: https://github.com/apache/spark/pull/47180
### What changes were proposed in this pull request?
DECLARE agg = 'max';
DECLARE col = 'c1';
DECLARE tab = 'T';
WITH S(c1, c2) AS (VALUES(1, 2), (2, 3)),
T(c1, c2) AS (VALUES ('a', 'b'), ('c', 'd'))
SELECT IDENTIFIER(agg)(IDENTIFIER(col)) FROM IDENTIFIER(tab);
-- OR
WITH S(c1, c2) AS (VALUES(1, 2), (2, 3)),
T(c1, c2) AS (VALUES ('a', 'b'), ('c', 'd'))
SELECT IDENTIFIER('max')(IDENTIFIER('c1')) FROM IDENTIFIER('T');
Currently we don't support Identifier clause as part of CTE reference.
### Why are the changes needed?
Adding support for Identifier clause as part of CTE reference for both
constant string expressions and session variables.
### Does this PR introduce _any_ user-facing change?
It contains user facing changes in sense that identifier clause as cte
reference will now be supported.
### How was this patch tested?
Added tests as part of this PR.
### Was this patch authored or co-authored using generative AI tooling?
No.
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