amogh-jahagirdar commented on code in PR #13464:
URL: https://github.com/apache/iceberg/pull/13464#discussion_r2190942553
##########
spark/v3.4/spark/src/main/java/org/apache/iceberg/spark/Spark3Util.java:
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@@ -234,6 +234,13 @@ private static void apply(UpdateSchema pendingUpdate,
TableChange.AddColumn add)
add.isNullable(),
"Incompatible change: cannot add required column: %s",
leafName(add.fieldNames()));
+ if (add.defaultValue() != null) {
+ throw new UnsupportedOperationException(
+ String.format(
+ "Cannot add column %s since default values are currently
unsupported",
Review Comment:
Yeah they can be read, you're right this error message does leave the
impression that it's generally not supported but that's not true. it's
specifically that setting default values in Spark is unsupported
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