Commits on Sep 11, 2019

1. opt: fix execbuilder output column count for lookup joins …

   This commit fixes a bug in the execbuilder, which was determining
   the number of output columns incorrectly for lookup joins. In particular,
   if the join was a semi- or anti-join, the execbuilder was incorrectly
   including the right side columns in the column count. This commit
   fixes the code so it only includes left side columns for semi- and
   anti-joins.
   
   This commit also fixes a bug in the DistSQL planner that was masked
   by the bug in the execbuilder. In particular, the output types slice
   for lookup semi- and anti-joins incorrectly included the types from the
   right side columns. This commit fixes it to only include types for the
   left side columns.
   
   Fixes cockroachdb#40562
   
   Release note (bug fix): Fixed an error that could occur when the
   optimizer created a plan with a lookup semi- or anti-join nested
   inside of another join.

   

   rytaft committed Sep 11, 2019
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