raminqaf commented on code in PR #29092:
URL: https://github.com/apache/flink/pull/29092#discussion_r3943663705
##########
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/functions/casting/CastRulesTest.java:
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@@ -267,6 +333,16 @@ class CastRulesTest {
"d",
ARRAY(STRING()).getLogicalType())))
.build());
+ // The variant a VARIANT row field round-trips to. A ROW cast serializes
each VARIANT field via
+ // BinaryRowWriter.writeVariant, which stores the field's sliced value and
the object metadata
+ // but
+ // drops the position, so the read-back variant equals neither the
original field view (non-zero
+ // pos) nor a freshly built scalar (empty metadata). This rebuilds that
exact form at pos 0.
Review Comment:
Shortened to 2 line
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