Github user JamesRTaylor commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/34#discussion_r22993421
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/index/IndexMaintainer.java ---
@@ -883,6 +903,14 @@ public void readFields(DataInput input) throws
IOException {
dataEmptyKeyValueCF = Bytes.readByteArray(input);
emptyKeyValueCFPtr = new
ImmutableBytesPtr(Bytes.readByteArray(input));
+ int numIndexedExpressions = WritableUtils.readVInt(input);
--- End diff --
This will likely be a b/w compat issue (as old clients wouldn't serialize
this. We may need to do something somewhat hacky, like negate an already
serialized value as a flag that this index maintainer may contain expressions.
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