xiedeyantu commented on code in PR #4665:
URL: https://github.com/apache/calcite/pull/4665#discussion_r2627122626
##########
core/src/main/codegen/templates/Parser.jj:
##########
@@ -3925,27 +3940,38 @@ SqlNode Expression3(ExprContext exprContext) :
LOOKAHEAD(3)
<ROW> {
s = span();
+ pushRowValueStar();
Review Comment:
Pgsql can support this syntax, following:
```
SELECT ROW(DEPT.*, ROW(DEPT.*)) FROM DEPT;
row
-----------------------------------------------------------
(10,ACCOUNTING,"NEW YORK","(10,ACCOUNTING,""NEW YORK"")")
(20,RESEARCH,DALLAS,"(20,RESEARCH,DALLAS)")
(30,SALES,CHICAGO,"(30,SALES,CHICAGO)")
(40,OPERATIONS,BOSTON,"(40,OPERATIONS,BOSTON)")
(4 rows)
```
It doesn't support `ROW(*, ROW(*))`. But I think we can support this form.
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