Avoid useless buffer allocations during binary COPY FROM.
authorTom Lane <tgl@sss.pgh.pa.us>
Sat, 11 Jul 2020 18:21:28 +0000 (14:21 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Sat, 11 Jul 2020 18:21:28 +0000 (14:21 -0400)
commitcd22d3cdb9bd9963c694c01a8c0232bbae3ddcfb
treedb03825cd2d21a726efcc59e71780f4758cc795f
parentea9125304dc6e90eabad165bd120eb1e667525d4
Avoid useless buffer allocations during binary COPY FROM.

The raw_buf and line_buf buffers aren't used when reading binary format,
so skip allocating them.  raw_buf is 64K so that seems like a worthwhile
savings.  An unused line_buf only wastes 1K, but as long as we're checking
it's free to avoid allocating that too.

Bharath Rupireddy, tweaked a bit by me

Discussion: https://postgr.es/m/CALj2ACXcCKaGPY0whowqrJ4OPJvDnTssgpGCzvuFQu5z0CXb-g@mail.gmail.com
src/backend/commands/copy.c