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| author | Robert Haas <rhaas@postgresql.org> | 2018-03-22 16:09:28 -0400 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2018-03-22 16:09:28 -0400 |
| commit | 88ba0ae2aa4aaba8ea0d85c0ff81cc46912d9308 (patch) | |
| tree | bc30394e2407488fe1c002a0dc1c7dd79b1f0cd9 /src/backend/jit/llvm/llvmjit_expr.c | |
| parent | 7c91a0364fcf5d739a09cc87e7adb1d4a33ed112 (diff) | |
| download | postgresql-88ba0ae2aa4aaba8ea0d85c0ff81cc46912d9308.tar.gz postgresql-88ba0ae2aa4aaba8ea0d85c0ff81cc46912d9308.zip | |
Consider Parallel Append of partial paths for UNION [ALL].
Without this patch, we can implement a UNION or UNION ALL as an
Append where Gather appears beneath one or more of the Append
branches, but this lets us put the Gather node on top, with
a partial path for each relation underneath.
There is considerably more work that could be done to improve
planning in this area, but that will probably need to wait
for a future release.
Patch by me, reviewed and tested by Ashutosh Bapat and Rajkumar
Raghuwanshi.
Discussion: http://postgr.es/m/CA+TgmoaLRAOqHmMZx=ESM3VDEPceg+-XXZsRXQ8GtFJO_zbMSw@mail.gmail.com
Diffstat (limited to 'src/backend/jit/llvm/llvmjit_expr.c')
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