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Commit4db44b4

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Adjust pg_dumpall so that it emits ENCODING, LC_COLLATE, and LC_CTYPE options
in its CREATE DATABASE commands only for databases that have settingsdifferent from the installation defaults. This is a low-tech method ofavoiding unnecessary platform dependencies in dump files. Eventually we oughtto have a platform-independent way of specifying LC_COLLATE and LC_CTYPE, butthat's not going to happen for 8.4, and this patch at least avoids the issuefor people who aren't setting up per-database locales. ENCODING doesn't havethe platform dependency problem, but it seems consistent to make it act thesame as the locale settings.
1 parent8dcf184 commit4db44b4

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1 file changed

+62
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‎src/bin/pg_dump/pg_dumpall.c

Lines changed: 62 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
* Portions Copyright (c) 1994, Regents of the University of California
77
*
88
*
9-
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dumpall.c,v 1.124 2009/04/11 20:23:05 tgl Exp $
9+
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_dumpall.c,v 1.125 2009/05/10 02:51:44 tgl Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -1076,11 +1076,59 @@ static void
10761076
dumpCreateDB(PGconn*conn)
10771077
{
10781078
PQExpBufferbuf=createPQExpBuffer();
1079+
char*default_encoding=NULL;
1080+
char*default_collate=NULL;
1081+
char*default_ctype=NULL;
10791082
PGresult*res;
10801083
inti;
10811084

10821085
fprintf(OPF,"--\n-- Database creation\n--\n\n");
10831086

1087+
/*
1088+
* First, get the installation's default encoding and locale information.
1089+
* We will dump encoding and locale specifications in the CREATE DATABASE
1090+
* commands for just those databases with values different from defaults.
1091+
*
1092+
* We consider template0's encoding and locale (or, pre-7.1, template1's)
1093+
* to define the installation default. Pre-8.4 installations do not
1094+
* have per-database locale settings; for them, every database must
1095+
* necessarily be using the installation default, so there's no need to
1096+
* do anything (which is good, since in very old versions there is no
1097+
* good way to find out what the installation locale is anyway...)
1098+
*/
1099+
if (server_version >=80400)
1100+
res=executeQuery(conn,
1101+
"SELECT pg_encoding_to_char(encoding), "
1102+
"datcollate, datctype "
1103+
"FROM pg_database "
1104+
"WHERE datname = 'template0'");
1105+
elseif (server_version >=70100)
1106+
res=executeQuery(conn,
1107+
"SELECT pg_encoding_to_char(encoding), "
1108+
"null::text AS datcollate, null::text AS datctype "
1109+
"FROM pg_database "
1110+
"WHERE datname = 'template0'");
1111+
else
1112+
res=executeQuery(conn,
1113+
"SELECT pg_encoding_to_char(encoding), "
1114+
"null::text AS datcollate, null::text AS datctype "
1115+
"FROM pg_database "
1116+
"WHERE datname = 'template1'");
1117+
1118+
/* If for some reason the template DB isn't there, treat as unknown */
1119+
if (PQntuples(res)>0)
1120+
{
1121+
if (!PQgetisnull(res,0,0))
1122+
default_encoding=strdup(PQgetvalue(res,0,0));
1123+
if (!PQgetisnull(res,0,1))
1124+
default_collate=strdup(PQgetvalue(res,0,1));
1125+
if (!PQgetisnull(res,0,2))
1126+
default_ctype=strdup(PQgetvalue(res,0,2));
1127+
}
1128+
1129+
PQclear(res);
1130+
1131+
/* Now collect all the information about databases to dump */
10841132
if (server_version >=80400)
10851133
res=executeQuery(conn,
10861134
"SELECT datname, "
@@ -1184,16 +1232,19 @@ dumpCreateDB(PGconn *conn)
11841232
if (strlen(dbowner)!=0)
11851233
appendPQExpBuffer(buf," OWNER = %s",fmtId(dbowner));
11861234

1187-
appendPQExpBuffer(buf," ENCODING = ");
1188-
appendStringLiteralConn(buf,dbencoding,conn);
1235+
if (default_encoding&&strcmp(dbencoding,default_encoding)!=0)
1236+
{
1237+
appendPQExpBuffer(buf," ENCODING = ");
1238+
appendStringLiteralConn(buf,dbencoding,conn);
1239+
}
11891240

1190-
if (strlen(dbcollate)!=0)
1241+
if (default_collate&&strcmp(dbcollate,default_collate)!=0)
11911242
{
11921243
appendPQExpBuffer(buf," LC_COLLATE = ");
11931244
appendStringLiteralConn(buf,dbcollate,conn);
11941245
}
11951246

1196-
if (strlen(dbctype)!=0)
1247+
if (default_ctype&&strcmp(dbctype,default_ctype)!=0)
11971248
{
11981249
appendPQExpBuffer(buf," LC_CTYPE = ");
11991250
appendStringLiteralConn(buf,dbctype,conn);
@@ -1219,18 +1270,18 @@ dumpCreateDB(PGconn *conn)
12191270

12201271
if (strcmp(dbistemplate,"t")==0)
12211272
{
1222-
appendPQExpBuffer(buf,"UPDATE pg_database SET datistemplate = 't' WHERE datname = ");
1273+
appendPQExpBuffer(buf,"UPDATEpg_catalog.pg_database SET datistemplate = 't' WHERE datname = ");
12231274
appendStringLiteralConn(buf,dbname,conn);
12241275
appendPQExpBuffer(buf,";\n");
12251276
}
12261277

12271278
if (binary_upgrade)
12281279
{
1229-
appendPQExpBuffer(buf,"\n-- For binary upgrade, set datfrozenxid.\n");
1230-
appendPQExpBuffer(buf,"UPDATE pg_database\n"
1231-
"SET datfrozenxid = '%u'\n"
1232-
"WHEREdatname = ",
1233-
dbfrozenxid);
1280+
appendPQExpBuffer(buf,"-- For binary upgrade, set datfrozenxid.\n");
1281+
appendPQExpBuffer(buf,"UPDATEpg_catalog.pg_database"
1282+
"SET datfrozenxid = '%u'"
1283+
"WHEREdatname = ",
1284+
dbfrozenxid);
12341285
appendStringLiteralConn(buf,dbname,conn);
12351286
appendPQExpBuffer(buf,";\n");
12361287
}

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