Taras Bobrovytsky has posted comments on this change. Change subject: IMPALA-5188: Add slot sorting in TupleDescriptor::LayoutEquals() ......................................................................
Patch Set 1: (1 comment) http://gerrit.cloudera.org:8080/#/c/6610/1/be/src/runtime/descriptors.cc File be/src/runtime/descriptors.cc: Line 344: // The vectors get copied because we intend to sort them and it is better to keep this > Can you point out an example of where that assumption is used? This all see Well, for example it's used here: http://github.mtv.cloudera.com/CDH/Impala/blob/cdh5-trunk/be/src/exec/topn-node-ir.cc#L40 The expressions here: sort_exec_exprs_.sort_tuple_slot_expr_ctxs() should be in the same order as the slots in output tuple. This causes a DCHECK in topn codegen: Otherwise it hits a DCHECK: tuple.cc:379] Check failed: slot_desc->type().type == TYPE_NULL || slot_desc->type() == materialize_expr_ctxs[i]->root()->type() -- To view, visit http://gerrit.cloudera.org:8080/6610 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I426ad244678dbfe517262dfb7bbf4adc0247a35e Gerrit-PatchSet: 1 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Taras Bobrovytsky <[email protected]> Gerrit-Reviewer: Alex Behm <[email protected]> Gerrit-Reviewer: Dan Hecht <[email protected]> Gerrit-Reviewer: Michael Brown <[email protected]> Gerrit-Reviewer: Taras Bobrovytsky <[email protected]> Gerrit-HasComments: Yes
