JingsongLi commented on code in PR #4992:
URL: https://github.com/apache/paimon/pull/4992#discussion_r1928155326
##########
paimon-common/src/main/java/org/apache/paimon/data/columnar/ColumnarRowIterator.java:
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@@ -89,9 +95,11 @@ public Path filePath() {
}
protected ColumnarRowIterator copy(ColumnVector[] vectors) {
+ // We should call copy only when the iterator is at the beginning of
the file.
+ assert nextPos == 0;
Review Comment:
Use `checkPrecondition`
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