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| author | Simon Riggs <simon@2ndQuadrant.com> | 2012-12-01 12:54:20 +0000 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2012-12-01 12:54:20 +0000 |
| commit | 8de72b66a2edcf12c812de0a73bd50b6b7d81d62 (patch) | |
| tree | 3cb4fc55c3d70b7b972910cfeb22cbb7c704875a /src/backend/parser | |
| parent | 44c03efee3d15a1db3d64bc5a2da91c145a91873 (diff) | |
| download | postgresql-8de72b66a2edcf12c812de0a73bd50b6b7d81d62.tar.gz postgresql-8de72b66a2edcf12c812de0a73bd50b6b7d81d62.zip | |
COPY FREEZE and mark committed on fresh tables.
When a relfilenode is created in this subtransaction or
a committed child transaction and it cannot otherwise
be seen by our own process, mark tuples committed ahead
of transaction commit for all COPY commands in same
transaction. If FREEZE specified on COPY
and pre-conditions met then rows will also be frozen.
Both options designed to avoid revisiting rows after commit,
increasing performance of subsequent commands after
data load and upgrade. pg_restore changes later.
Simon Riggs, review comments from Heikki Linnakangas, Noah Misch and design
input from Tom Lane, Robert Haas and Kevin Grittner
Diffstat (limited to 'src/backend/parser')
| -rw-r--r-- | src/backend/parser/gram.y | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y index e4ff76e66e0..ad98b364f13 100644 --- a/src/backend/parser/gram.y +++ b/src/backend/parser/gram.y @@ -2383,6 +2383,10 @@ copy_opt_item: { $$ = makeDefElem("oids", (Node *)makeInteger(TRUE)); } + | FREEZE + { + $$ = makeDefElem("freeze", (Node *)makeInteger(TRUE)); + } | DELIMITER opt_as Sconst { $$ = makeDefElem("delimiter", (Node *)makeString($3)); |