IGNITE-27976 Support OVER clause with unbounded frame

[vldpyatkov]

https://issues.apache.org/jira/browse/IGNITE-27976

[zstan]

no one test is covered case where inputFieldCnt != 0, it need to be covered or removed if unnecessary

[vldpyatkov]

inputFieldCnt - count of fields in the input projection, before a window group calculation.
grpKeyCnt - count of fields into "PARTITION BY" clause.
aggFieldCnt - count of aggregate functions in the windows group.
These vars are not 0 in almost all queries.

[zstan]

Suggested change

	RexNode left = rexBuilder.makeInputRef(joinRowType, keyIdx);
	RexNode right = rexBuilder.makeInputRef(joinRowType, inputFieldCnt + i);
	RexNode left = rexBuilder.makeInputRef(input.getRowType(), keyIdx);
	RexNode right = rexBuilder.makeInputRef(agg.getRowType(), inputFieldCnt + i);

[vldpyatkov]

I doubt the type calculation, but nothing failed when I did it like you said.
So, finally, this change applied.

[zstan]

Overall looks good, one case is questionable - what the plan for supporting "ORDER BY" ? Did this rule still be helpful or it need to be ovewritten at all ? @alex-plekhanov plz take a look too ?

[vldpyatkov]

Overall looks good, one case is questionable - what the plan for supporting "ORDER BY" ? Did this rule still be helpful or it need to be ovewritten at all ? @alex-plekhanov plz take a look too ?

Unfortunately, the "ORDER BY" clause is far from the entire implementation of window functions.
This implementation is limited by the ticket description.

[sonarqubecloud]

Quality Gate failed

Failed conditions
3 New Code Smells (required ≤ 1)

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