branch-4.1: [fix](eagerAgg) Fix eager aggregation incorrectly pushing agg(literal) to nullable side of outer joins #62107#63575
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…) to nullable side of outer joins (apache#62107) Issue Number: close #xxx Problem Summary: The EagerAggRewriter only blocked count(*)/count(literal) from being pushed to the nullable side of outer joins (via instanceof Count check). But the same logic applies to ALL aggregate functions whose input slots do not reference columns from the target side, e.g. sum(2), min(1), max(3). For unmatched rows in outer joins, these aggregates should produce their literal-based result (e.g. sum(2) adds 2 per unmatched row). After incorrect pushdown to the nullable side, the pre-aggregated slot becomes NULL for unmatched rows, and sum(NULL)/min(NULL)/max(NULL) loses the contribution entirely. The fix generalizes the existing Count-only guard to all aggregate functions: for any agg function with no input slots from the target side, block pushdown to the nullable side of outer joins. agg(nullable_side_col) is still safe to push because NULL values are naturally handled by aggregates. case
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pick #62107