DaveBirdsall opened a new pull request #1853: [TRAFODION-3324] Prevent core when histogram exists on non-existent column URL: https://github.com/apache/trafodion/pull/1853 Formerly, if we create a Hive table, populate it with some rows, do UPDATE STATISTICS on it within Trafodion, then drop and recreate the table with fewer columns in Hive (bypassing Trafodion), we would get a core if we subsequently tried to access that table via a Trafodion DML statement. This has been fixed. Trafodion will now detect histograms on non-existent columns, and ignore them instead. A new warning, 9235, is raised in this case. Note that Trafodion supports performing Hive DDL from Trafodion sqlci and trafci, and this is the recommended practice when using Trafodion. In that case, Trafodion will automatically drop any histograms it has on the Hive table, avoiding this issue. The change here simply makes Trafodion a bit more robust when this recommendation is not followed.
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