Github user zellerh commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/60#discussion_r37246902
--- Diff: core/sql/optimizer/NATable.cpp ---
@@ -1472,58 +1478,161 @@ static ItemExpr *
getRangePartitionBoundaryValuesFromEncodedKeys(
// value. Note that the buffer has a prefix of some bytes
with actual key
// values, followed by bytes that are zeroed out.
+ // the number of bytes actually provided in the key (not
filled in)
+ int numBytesInProvidedVal = encodedKeyLen-valOffset;
+
+ if (nullHdrSize && numBytesInProvidedVal <= 0)
--- End diff --
Couldn't this happen, for example?
currOffset = 10
encodedKeyLen = 11
nullHdrSize = 2
valOffset = 12
In other words, the partially provided key covers only the NULL indicator
or part of it.
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