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Commit40b9c27

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pg_restore cleanups
. remove unnecessary oid_string list stuff. use pg_get_line_buf() instead of open-coding it. cleaner parsing of map.dat linesReverts2b69afb add new list type simple_oid_string_list to fe-utils/simple_listAuthor: Álvaro Herrera <alvherre@kurilemu.de>Author: Andrew Dunstan <andrew@dunslane.net>Discussion:https://postgr.es/m/202504141220.343fmoxfsbj4@alvherre.pgsql
1 parent3b35f9a commit40b9c27

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4 files changed

+65
-100
lines changed

4 files changed

+65
-100
lines changed

‎src/bin/pg_dump/pg_restore.c

Lines changed: 64 additions & 41 deletions
Original file line numberDiff line numberDiff line change
@@ -67,10 +67,20 @@ static intprocess_global_sql_commands(PGconn *conn, const char *dumpdirpath,
6767
constchar*outfile);
6868
staticvoidcopy_or_print_global_file(constchar*outfile,FILE*pfile);
6969
staticintget_dbnames_list_to_restore(PGconn*conn,
70-
SimpleOidStringList*dbname_oid_list,
70+
SimplePtrList*dbname_oid_list,
7171
SimpleStringListdb_exclude_patterns);
7272
staticintget_dbname_oid_list_from_mfile(constchar*dumpdirpath,
73-
SimpleOidStringList*dbname_oid_list);
73+
SimplePtrList*dbname_oid_list);
74+
75+
/*
76+
* Stores a database OID and the corresponding name.
77+
*/
78+
typedefstructDbOidName
79+
{
80+
Oidoid;
81+
charstr[FLEXIBLE_ARRAY_MEMBER];/* null-terminated string here */
82+
}DbOidName;
83+
7484

7585
int
7686
main(intargc,char**argv)
@@ -927,7 +937,7 @@ read_one_statement(StringInfo inBuf, FILE *pfile)
927937
*/
928938
staticint
929939
get_dbnames_list_to_restore(PGconn*conn,
930-
SimpleOidStringList*dbname_oid_list,
940+
SimplePtrList*dbname_oid_list,
931941
SimpleStringListdb_exclude_patterns)
932942
{
933943
intcount_db=0;
@@ -943,21 +953,22 @@ get_dbnames_list_to_restore(PGconn *conn,
943953
* Process one by one all dbnames and if specified to skip restoring, then
944954
* remove dbname from list.
945955
*/
946-
for (SimpleOidStringListCell*db_cell=dbname_oid_list->head;
956+
for (SimplePtrListCell*db_cell=dbname_oid_list->head;
947957
db_cell;db_cell=db_cell->next)
948958
{
959+
DbOidName*dbidname= (DbOidName*)db_cell->ptr;
949960
boolskip_db_restore= false;
950961
PQExpBufferdb_lit=createPQExpBuffer();
951962

952-
appendStringLiteralConn(db_lit,db_cell->str,conn);
963+
appendStringLiteralConn(db_lit,dbidname->str,conn);
953964

954965
for (SimpleStringListCell*pat_cell=db_exclude_patterns.head;pat_cell;pat_cell=pat_cell->next)
955966
{
956967
/*
957968
* If there is an exact match then we don't need to try a pattern
958969
* match
959970
*/
960-
if (pg_strcasecmp(db_cell->str,pat_cell->val)==0)
971+
if (pg_strcasecmp(dbidname->str,pat_cell->val)==0)
961972
skip_db_restore= true;
962973
/* Otherwise, try a pattern match if there is a connection */
963974
elseif (conn)
@@ -972,7 +983,7 @@ get_dbnames_list_to_restore(PGconn *conn,
972983
if (dotcnt>0)
973984
{
974985
pg_log_error("improper qualified name (too many dotted names): %s",
975-
db_cell->str);
986+
dbidname->str);
976987
PQfinish(conn);
977988
exit_nicely(1);
978989
}
@@ -982,7 +993,7 @@ get_dbnames_list_to_restore(PGconn *conn,
982993
if ((PQresultStatus(res)==PGRES_TUPLES_OK)&&PQntuples(res))
983994
{
984995
skip_db_restore= true;
985-
pg_log_info("database \"%s\" matches exclude pattern: \"%s\"",db_cell->str,pat_cell->val);
996+
pg_log_info("database \"%s\" matches exclude pattern: \"%s\"",dbidname->str,pat_cell->val);
986997
}
987998

988999
PQclear(res);
@@ -1001,8 +1012,8 @@ get_dbnames_list_to_restore(PGconn *conn,
10011012
*/
10021013
if (skip_db_restore)
10031014
{
1004-
pg_log_info("excluding database \"%s\"",db_cell->str);
1005-
db_cell->oid=InvalidOid;
1015+
pg_log_info("excluding database \"%s\"",dbidname->str);
1016+
dbidname->oid=InvalidOid;
10061017
}
10071018
else
10081019
{
@@ -1024,13 +1035,14 @@ get_dbnames_list_to_restore(PGconn *conn,
10241035
* Returns, total number of database names in map.dat file.
10251036
*/
10261037
staticint
1027-
get_dbname_oid_list_from_mfile(constchar*dumpdirpath,SimpleOidStringList*dbname_oid_list)
1038+
get_dbname_oid_list_from_mfile(constchar*dumpdirpath,SimplePtrList*dbname_oid_list)
10281039
{
1040+
StringInfoDatalinebuf;
10291041
FILE*pfile;
10301042
charmap_file_path[MAXPGPATH];
1031-
charline[MAXPGPATH];
10321043
intcount=0;
10331044

1045+
10341046
/*
10351047
* If there is only global.dat file in dump, then return from here as
10361048
* there is no database to restore.
@@ -1049,32 +1061,43 @@ get_dbname_oid_list_from_mfile(const char *dumpdirpath, SimpleOidStringList *dbn
10491061
if (pfile==NULL)
10501062
pg_fatal("could not open \"%s\": %m",map_file_path);
10511063

1064+
initStringInfo(&linebuf);
1065+
10521066
/* Append all the dbname/db_oid combinations to the list. */
1053-
while ((fgets(line,MAXPGPATH,pfile))!=NULL)
1067+
while (pg_get_line_buf(pfile,&linebuf))
10541068
{
10551069
Oiddb_oid=InvalidOid;
1056-
chardb_oid_str[MAXPGPATH+1]="";
10571070
char*dbname;
1071+
DbOidName*dbidname;
1072+
intnamelen;
1073+
char*p=linebuf.data;
10581074

10591075
/* Extract dboid. */
1060-
sscanf(line,"%u",&db_oid);
1061-
sscanf(line,"%20s",db_oid_str);
1076+
while (isdigit(*p))
1077+
p++;
1078+
if (p>linebuf.data&&*p==' ')
1079+
{
1080+
sscanf(linebuf.data,"%u",&db_oid);
1081+
p++;
1082+
}
10621083

10631084
/* dbname is the rest of the line */
1064-
dbname=line+strlen(db_oid_str)+1;
1085+
dbname=p;
1086+
namelen=strlen(dbname);
10651087

1066-
/* Remove \n from dbname. */
1067-
dbname[strlen(dbname)-1]='\0';
1088+
/* Report error and exit if the file has any corrupted data. */
1089+
if (!OidIsValid(db_oid)||namelen <=1)
1090+
pg_fatal("invalid entry in \"%s\" at line: %d",map_file_path,
1091+
count+1);
10681092

10691093
pg_log_info("found database \"%s\" (OID: %u) in \"%s\"",
10701094
dbname,db_oid,map_file_path);
10711095

1072-
/* Report error and exit if the file has any corrupted data. */
1073-
if (!OidIsValid(db_oid)||strlen(dbname)==0)
1074-
pg_fatal("invalid entry in \"%s\" at line : %d",map_file_path,
1075-
count+1);
1096+
dbidname=pg_malloc(offsetof(DbOidName,str)+namelen+1);
1097+
dbidname->oid=db_oid;
1098+
strlcpy(dbidname->str,dbname,namelen);
10761099

1077-
simple_oid_string_list_append(dbname_oid_list,db_oid,dbname);
1100+
simple_ptr_list_append(dbname_oid_list,dbidname);
10781101
count++;
10791102
}
10801103

@@ -1100,7 +1123,7 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
11001123
SimpleStringListdb_exclude_patterns,RestoreOptions*opts,
11011124
intnumWorkers)
11021125
{
1103-
SimpleOidStringListdbname_oid_list= {NULL,NULL};
1126+
SimplePtrListdbname_oid_list= {NULL,NULL};
11041127
intnum_db_restore=0;
11051128
intnum_total_db;
11061129
intn_errors_total;
@@ -1116,7 +1139,7 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
11161139

11171140
num_total_db=get_dbname_oid_list_from_mfile(dumpdirpath,&dbname_oid_list);
11181141

1119-
/* If map.dat has noentry, return after processing global.dat */
1142+
/* If map.dat has noentries, return after processing global.dat */
11201143
if (dbname_oid_list.head==NULL)
11211144
returnprocess_global_sql_commands(conn,dumpdirpath,opts->filename);
11221145

@@ -1164,20 +1187,20 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
11641187
pg_log_info("need to restore %d databases out of %d databases",num_db_restore,num_total_db);
11651188

11661189
/*
1167-
* Till now, we made a list of databases, those needs to be restored after
1168-
* skipping names of exclude-database. Now we can launch parallel workers
1169-
* to restore these databases.
1190+
* We have a list of databases to restore after processing the
1191+
* exclude-database switch(es). Now we can restore them one by one.
11701192
*/
1171-
for (SimpleOidStringListCell*db_cell=dbname_oid_list.head;
1193+
for (SimplePtrListCell*db_cell=dbname_oid_list.head;
11721194
db_cell;db_cell=db_cell->next)
11731195
{
1196+
DbOidName*dbidname= (DbOidName*)db_cell->ptr;
11741197
charsubdirpath[MAXPGPATH];
11751198
charsubdirdbpath[MAXPGPATH];
11761199
chardbfilename[MAXPGPATH];
11771200
intn_errors;
11781201

11791202
/* ignore dbs marked for skipping */
1180-
if (db_cell->oid==InvalidOid)
1203+
if (dbidname->oid==InvalidOid)
11811204
continue;
11821205

11831206
/*
@@ -1197,27 +1220,27 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
11971220
* {oid}.dmp file, use it. Otherwise try to use a directory called
11981221
* {oid}
11991222
*/
1200-
snprintf(dbfilename,MAXPGPATH,"%u.tar",db_cell->oid);
1223+
snprintf(dbfilename,MAXPGPATH,"%u.tar",dbidname->oid);
12011224
if (file_exists_in_directory(subdirdbpath,dbfilename))
1202-
snprintf(subdirpath,MAXPGPATH,"%s/databases/%u.tar",dumpdirpath,db_cell->oid);
1225+
snprintf(subdirpath,MAXPGPATH,"%s/databases/%u.tar",dumpdirpath,dbidname->oid);
12031226
else
12041227
{
1205-
snprintf(dbfilename,MAXPGPATH,"%u.dmp",db_cell->oid);
1228+
snprintf(dbfilename,MAXPGPATH,"%u.dmp",dbidname->oid);
12061229

12071230
if (file_exists_in_directory(subdirdbpath,dbfilename))
1208-
snprintf(subdirpath,MAXPGPATH,"%s/databases/%u.dmp",dumpdirpath,db_cell->oid);
1231+
snprintf(subdirpath,MAXPGPATH,"%s/databases/%u.dmp",dumpdirpath,dbidname->oid);
12091232
else
1210-
snprintf(subdirpath,MAXPGPATH,"%s/databases/%u",dumpdirpath,db_cell->oid);
1233+
snprintf(subdirpath,MAXPGPATH,"%s/databases/%u",dumpdirpath,dbidname->oid);
12111234
}
12121235

1213-
pg_log_info("restoring database \"%s\"",db_cell->str);
1236+
pg_log_info("restoring database \"%s\"",dbidname->str);
12141237

12151238
/* If database is already created, then don't set createDB flag. */
12161239
if (opts->cparams.dbname)
12171240
{
12181241
PGconn*test_conn;
12191242

1220-
test_conn=ConnectDatabase(db_cell->str,NULL,opts->cparams.pghost,
1243+
test_conn=ConnectDatabase(dbidname->str,NULL,opts->cparams.pghost,
12211244
opts->cparams.pgport,opts->cparams.username,TRI_DEFAULT,
12221245
false,progname,NULL,NULL,NULL,NULL);
12231246
if (test_conn)
@@ -1226,7 +1249,7 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
12261249

12271250
/* Use already created database for connection. */
12281251
opts->createDB=0;
1229-
opts->cparams.dbname=db_cell->str;
1252+
opts->cparams.dbname=dbidname->str;
12301253
}
12311254
else
12321255
{
@@ -1251,7 +1274,7 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
12511274
if (n_errors)
12521275
{
12531276
n_errors_total+=n_errors;
1254-
pg_log_warning("errors ignored on database \"%s\" restore: %d",db_cell->str,n_errors);
1277+
pg_log_warning("errors ignored on database \"%s\" restore: %d",dbidname->str,n_errors);
12551278
}
12561279

12571280
count++;
@@ -1261,7 +1284,7 @@ restore_all_databases(PGconn *conn, const char *dumpdirpath,
12611284
pg_log_info("number of restored databases is %d",num_db_restore);
12621285

12631286
/* Free dbname and dboid list. */
1264-
simple_oid_string_list_destroy(&dbname_oid_list);
1287+
simple_ptr_list_destroy(&dbname_oid_list);
12651288

12661289
returnn_errors_total;
12671290
}

‎src/fe_utils/simple_list.c

Lines changed: 0 additions & 41 deletions
Original file line numberDiff line numberDiff line change
@@ -192,44 +192,3 @@ simple_ptr_list_destroy(SimplePtrList *list)
192192
cell=next;
193193
}
194194
}
195-
196-
/*
197-
* Add to an oid_string list
198-
*/
199-
void
200-
simple_oid_string_list_append(SimpleOidStringList*list,Oidoid,constchar*str)
201-
{
202-
SimpleOidStringListCell*cell;
203-
204-
cell= (SimpleOidStringListCell*)
205-
pg_malloc(offsetof(SimpleOidStringListCell,str)+strlen(str)+1);
206-
207-
cell->next=NULL;
208-
cell->oid=oid;
209-
strcpy(cell->str,str);
210-
211-
if (list->tail)
212-
list->tail->next=cell;
213-
else
214-
list->head=cell;
215-
list->tail=cell;
216-
}
217-
218-
/*
219-
* Destroy an oid_string list
220-
*/
221-
void
222-
simple_oid_string_list_destroy(SimpleOidStringList*list)
223-
{
224-
SimpleOidStringListCell*cell;
225-
226-
cell=list->head;
227-
while (cell!=NULL)
228-
{
229-
SimpleOidStringListCell*next;
230-
231-
next=cell->next;
232-
pg_free(cell);
233-
cell=next;
234-
}
235-
}

‎src/include/fe_utils/simple_list.h

Lines changed: 0 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -55,19 +55,6 @@ typedef struct SimplePtrList
5555
SimplePtrListCell*tail;
5656
}SimplePtrList;
5757

58-
typedefstructSimpleOidStringListCell
59-
{
60-
structSimpleOidStringListCell*next;
61-
Oidoid;
62-
charstr[FLEXIBLE_ARRAY_MEMBER];/* null-terminated string here */
63-
}SimpleOidStringListCell;
64-
65-
typedefstructSimpleOidStringList
66-
{
67-
SimpleOidStringListCell*head;
68-
SimpleOidStringListCell*tail;
69-
}SimpleOidStringList;
70-
7158
externvoidsimple_oid_list_append(SimpleOidList*list,Oidval);
7259
externboolsimple_oid_list_member(SimpleOidList*list,Oidval);
7360
externvoidsimple_oid_list_destroy(SimpleOidList*list);
@@ -81,7 +68,4 @@ extern const char *simple_string_list_not_touched(SimpleStringList *list);
8168
externvoidsimple_ptr_list_append(SimplePtrList*list,void*ptr);
8269
externvoidsimple_ptr_list_destroy(SimplePtrList*list);
8370

84-
externvoidsimple_oid_string_list_append(SimpleOidStringList*list,Oidoid,constchar*str);
85-
externvoidsimple_oid_string_list_destroy(SimpleOidStringList*list);
86-
8771
#endif/* SIMPLE_LIST_H */

‎src/tools/pgindent/typedefs.list

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -615,6 +615,7 @@ DatumTupleFields
615615
DbInfo
616616
DbInfoArr
617617
DbLocaleInfo
618+
DbOidName
618619
DeClonePtrType
619620
DeadLockState
620621
DeallocateStmt
@@ -2756,8 +2757,6 @@ SimpleActionListCell
27562757
SimpleEcontextStackEntry
27572758
SimpleOidList
27582759
SimpleOidListCell
2759-
SimpleOidStringList
2760-
SimpleOidListStringCell
27612760
SimplePtrList
27622761
SimplePtrListCell
27632762
SimpleStats

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