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Original file line number Diff line number Diff line change
Expand Up @@ -293,7 +293,7 @@ public static final class TableColumn
private final String columnName;
// This signifies whether the mapping is direct or not.
// Mapping is always direct in inner join case. In the outer join case, only the mapping from a column to its source column in the join input table is direct.
// For e.g. in case of SELECT t1_a as t1.a, t2_a as t2.a FROM t1 LEFT JOIN t2 ON t1.a = t2.a
// For e.g. in case of SELECT t1.a as t1_a, t2.a as t2_a FROM t1 LEFT JOIN t2 ON t1.a = t2.a
// t1_a -> t1.a is direct mapped
// t1_a -> t2.a is NOT direct mapped(as t1,t2 are in outer join)
// t2_a -> t2.a is direct mapped(value can become null but column mapping is not altered)
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