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BLZG-2083 str() produces NotMaterializedException when using group by/sample#28
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igor-kim wants to merge 1 commit intoblazegraph:masterfrom
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BLZG-2083 str() produces NotMaterializedException when using group by/sample#28igor-kim wants to merge 1 commit intoblazegraph:masterfrom
igor-kim wants to merge 1 commit intoblazegraph:masterfrom
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NotMaterializedException can be thrown by a function referenced in group by, to avoid that all variables referenced in group by expressions should be materialized, as MemoryGroupByOp needs real IVs. To avoid excessive adding of unneeded variables, varMap is provided as a reference of variables which might need materialization.