mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2024-12-09 08:10:09 +08:00
Code Issues Packages Projects Releases Wiki Activity

Fix performance regression in dblink connection speed.

Browse Source 
Previous commit e5de601267 modified dblink
to ensure client encoding matched the server. However the added
PQsetClientEncoding() call added significant overhead. Restore original
performance in the common case where client encoding already matches
server encoding by doing nothing in that case. Applies to all active
branches.

Issue reported and work sponsored by Zonar Systems.
This commit is contained in:
Joe Conway 2013-12-07 17:00:10 -08:00
parent 2dcc48c35a
commit 0ec530625f
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
contrib/dblink/dblink.c
View File

@ -209,7 +209,8 @@ typedef struct remoteConnHashEnt
errdetail_internal("%s", msg))); \
} \
dblink_security_check(conn, rconn); \
PQsetClientEncoding(conn, GetDatabaseEncodingName()); \
if (PQclientEncoding(conn) != GetDatabaseEncoding()) \
PQsetClientEncoding(conn, GetDatabaseEncodingName()); \
freeconn = true; \
} \
} while (0)
@ -288,8 +289,9 @@ dblink_connect(PG_FUNCTION_ARGS)
/* check password actually used if not superuser */
dblink_security_check(conn, rconn);
/* attempt to set client encoding to match server encoding */
PQsetClientEncoding(conn, GetDatabaseEncodingName());
/* attempt to set client encoding to match server encoding, if needed */
if (PQclientEncoding(conn) != GetDatabaseEncoding())
PQsetClientEncoding(conn, GetDatabaseEncodingName());
if (connname)
{