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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2019-12-02 18:05:29 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2019-12-02 18:05:29 -0500 |
| commit | ce76c0ba53e4bd0daf3db7a703671b27797b7244 (patch) | |
| tree | 920ca4a5cc36e169181e12cc3880f2295f28e17a /src/backend/nodes/copyfuncs.c | |
| parent | 4526951d564a7eed512b4a0ac3b5893e0a115690 (diff) | |
| download | postgresql-ce76c0ba53e4bd0daf3db7a703671b27797b7244.tar.gz postgresql-ce76c0ba53e4bd0daf3db7a703671b27797b7244.zip | |
Add a reverse-translation column number array to struct AppendRelInfo.
This provides for cheaper mapping of child columns back to parent
columns. The one existing use-case in examine_simple_variable()
would hardly justify this by itself; but an upcoming bug fix will
make use of this array in a mainstream code path, and it seems
likely that we'll find other uses for it as we continue to build
out the partitioning infrastructure.
Discussion: https://postgr.es/m/12424.1575168015@sss.pgh.pa.us
Diffstat (limited to 'src/backend/nodes/copyfuncs.c')
| -rw-r--r-- | src/backend/nodes/copyfuncs.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c index 2f267e4bb65..a74b56bb599 100644 --- a/src/backend/nodes/copyfuncs.c +++ b/src/backend/nodes/copyfuncs.c @@ -2327,6 +2327,8 @@ _copyAppendRelInfo(const AppendRelInfo *from) COPY_SCALAR_FIELD(parent_reltype); COPY_SCALAR_FIELD(child_reltype); COPY_NODE_FIELD(translated_vars); + COPY_SCALAR_FIELD(num_child_cols); + COPY_POINTER_FIELD(parent_colnos, from->num_child_cols * sizeof(AttrNumber)); COPY_SCALAR_FIELD(parent_reloid); return newnode; |