Add -q option to oid2name. Add sample session to README.
This commit is contained in:
Bruce Momjian
parent
0f865e17e2
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5a8f555e41
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@ -1,17 +1,20 @@
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With version 7.1 of PostgreSQL server, the old naming scheme for
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databases and tables (in $PGDATA/base) has changed. The databases
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are put in folders for their OID in pg_database and the tables in
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that folder are named for their OIDs in pg_class. This app connects
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to the database (you can specify host, port, user, pass etc to
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connect to a host other than localhost) and extracts the OID and
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table name information. It has 4 ways it can be run:
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This utility allows administrators to view the file structure used by
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PostgreSQL. Databases are placed in directories based on their OIDs in
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pg_database, and the tables in that directory are named by their OIDs,
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stored in pg_class.relfilenode. Oid2name connects to the database and
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extracts the OID and table name information.
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pg_oid2name
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---------------------------------------------------------------------------
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It can be used in four ways:
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oid2name
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This will connect to the template1 database and display all databases
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in the system.
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in the system:
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$ ./pg_oid2name
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$ oid2name
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All databases:
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---------------------------------
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18720 = test1
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@ -21,52 +24,88 @@ table name information. It has 4 ways it can be run:
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18735 = postgres
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18736 = cssi
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pg_oid2name -d test [-x]
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This connects to the database test and shows all tables and their OIDs.
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oid2name -d test [-x]
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$ ./pg_oid2name -d test
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This connects to the database test and shows all tables and their OIDs:
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$ oid2name -d test
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All tables from database "test":
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---------------------------------
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18766 = dns
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18737 = ips
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18722 = testdate
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pg_oid2name -d test -o 18737 or
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pg_oid2name -d test -t testdate
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oid2name -d test -o 18737
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oid2name -d test -t testdate
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This will connect to the database test and display the table name for oid
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18737 and the oid for table name testdate respectivly.
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18737 and the oid for table name testdate respectively:
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$ ./pg_oid2name -d test -o 18737
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$ oid2name -d test -o 18737
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Tablename of oid 18737 from database "test":
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---------------------------------
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18737 = ips
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$ ./pg_oid2name -d test -t testdate
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$ oid2name -d test -t testdate
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Oid of table testdate from database "test":
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_______________________________
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---------------------------------
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18722 = testdate
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---------------------------------------------------------------------------
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There should be a decent amount of error handling in the app, a lot of it
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dealt with via the postgres function calls.
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Sample session:
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$ ./pg_oid2name -d nothere -t testdate
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Oid of table testdate from database "nothere":
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_______________________________
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Connection to database 'nothere' failed.
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FATAL 1: Database "nothere" does not exist in the system catalog.
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$ cd /u/pg/data/base
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$ oid2name
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All databases:
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---------------------------------
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16817 = test2
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16578 = x
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16756 = test
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1 = template1
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16569 = template0
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16818 = test3
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16811 = floattest
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$ ./pg_oid2name -d test -t nothere
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Oid of table nothere from database "test":
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_______________________________
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No tables with that name found
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$ cd 16756
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$ ls 1873*
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18730 18731 18732 18735 18736 18737 18738 18739
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$ oid2name -d test -o 18737
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Tablename of oid 18737 from database "test":
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---------------------------------
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18737 = ips
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$ oid2name -d test -t ips
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Oid of table ips from database "test":
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---------------------------------
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18737 = ips
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$ du * | while read SIZE OID
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> do
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> echo "$SIZE `oid2name -q -d test -o $OID`"
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> done
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24 18737 = ips
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36 18722 = cities
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...
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$ du * | while read SIZE OID
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> do
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> echo "$SIZE `oid2name -q -d test -o $OID`"
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> done |
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> sort -rn
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2048 19324 = bigtable
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1950 23903 = customers
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...
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---------------------------------------------------------------------------
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Mail me with any problems or additions you would like to see. Clearing
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house for the code will be at: http://www.crimelabs.net
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house for the code will be at: http://www.crimelabs.net
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b. palmer, bpalmer@crimelabs.net
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@ -21,6 +21,8 @@ struct options
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int gettable;
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int getoid;
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int quiet;
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int systables;
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int remotehost;
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@ -59,6 +61,8 @@ get_opts(int argc, char **argv, struct options * my_opts)
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my_opts->gettable = 0;
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my_opts->getoid = 0;
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my_opts->quiet = 0;
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my_opts->systables = 0;
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my_opts->remotehost = 0;
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@ -67,7 +71,7 @@ get_opts(int argc, char **argv, struct options * my_opts)
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my_opts->remotepass = 0;
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/* get opts */
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while ((c = getopt(argc, argv, "H:p:U:P:d:t:o:xh?")) != -1)
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while ((c = getopt(argc, argv, "H:p:U:P:d:t:o:qxh?")) != -1)
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{
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switch (c)
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{
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@ -82,13 +86,13 @@ get_opts(int argc, char **argv, struct options * my_opts)
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/* make sure we set the database first */
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if (!my_opts->getdatabase)
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{
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fprintf(stderr, "Sorry, but you must specify a database to dump from.\n");
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fprintf(stderr, "You must specify a database to dump from.\n");
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exit(1);
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}
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/* make sure we don't try to do a -o also */
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if (my_opts->getoid)
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{
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fprintf(stderr, "Sorry, you can only specify either oid or table\n");
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fprintf(stderr, "You can only specify either oid or table\n");
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exit(1);
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}
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@ -102,13 +106,13 @@ get_opts(int argc, char **argv, struct options * my_opts)
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/* make sure we set the database first */
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if (!my_opts->getdatabase)
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{
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fprintf(stderr, "Sorry, but you must specify a database to dump from.\n");
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fprintf(stderr, "You must specify a database to dump from.\n");
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exit(1);
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}
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/* make sure we don't try to do a -t also */
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if (my_opts->gettable)
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{
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fprintf(stderr, "Sorry, you can only specify either oid or table\n");
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fprintf(stderr, "You can only specify either oid or table\n");
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exit(1);
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}
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@ -117,6 +121,10 @@ get_opts(int argc, char **argv, struct options * my_opts)
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break;
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case 'q':
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my_opts->quiet = 1;
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break;
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/* host to connect to */
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case 'H':
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my_opts->remotehost = 1;
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@ -149,17 +157,18 @@ get_opts(int argc, char **argv, struct options * my_opts)
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/* help! (ugly in code for easier editing) */
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case '?':
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case 'h':
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fprintf(stderr, "\n\
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Usage: pg_oid2name [-d database [-x] ] [-t table | -o oid] \n\
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fprintf(stderr, "\
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Usage: pg_oid2name [-d database [-x] ] [-t table | -o oid]\n\
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default action display all databases\n\
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-d database database to oid2name\n\
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-x display system tables\n\
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-t table | -o oid search for table name (-t) or\n\
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oid (-o) in -d database\n\
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-q quiet\n\
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-H host connect to remote host\n\
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-p port host port to connect to\n\
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-U username username to connect with\n\
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-P password password for username\n\n\
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-P password password for username\n\
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");
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exit(1);
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break;
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@ -402,9 +411,11 @@ main(int argc, char **argv)
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/* display all the tables in the database */
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if (my_opts->getdatabase & my_opts->gettable)
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{
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printf("Oid of table %s from database \"%s\":\n", my_opts->_tbname, my_opts->_dbname);
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printf("_______________________________\n");
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if (!my_opts->quiet)
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{
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printf("Oid of table %s from database \"%s\":\n", my_opts->_tbname, my_opts->_dbname);
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printf("---------------------------------\n");
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}
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pgconn = sql_conn(my_opts->_dbname, my_opts);
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sql_exec_searchtable(pgconn, my_opts->_tbname);
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PQfinish(pgconn);
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@ -415,9 +426,11 @@ main(int argc, char **argv)
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/* search for the tablename of the given OID */
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if (my_opts->getdatabase & my_opts->getoid)
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{
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printf("Tablename of oid %i from database \"%s\":\n", my_opts->_oid, my_opts->_dbname);
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printf("---------------------------------\n");
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if (!my_opts->quiet)
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{
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printf("Tablename of oid %i from database \"%s\":\n", my_opts->_oid, my_opts->_dbname);
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printf("---------------------------------\n");
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}
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pgconn = sql_conn(my_opts->_dbname, my_opts);
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sql_exec_searchoid(pgconn, my_opts->_oid);
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PQfinish(pgconn);
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@ -428,9 +441,11 @@ main(int argc, char **argv)
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/* search for the oid for the given tablename */
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if (my_opts->getdatabase)
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{
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printf("All tables from database \"%s\":\n", my_opts->_dbname);
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printf("---------------------------------\n");
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if (!my_opts->quiet)
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{
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printf("All tables from database \"%s\":\n", my_opts->_dbname);
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printf("---------------------------------\n");
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}
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pgconn = sql_conn(my_opts->_dbname, my_opts);
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sql_exec_dumptable(pgconn, my_opts->systables);
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PQfinish(pgconn);
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@ -439,9 +454,11 @@ main(int argc, char **argv)
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}
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/* display all the databases for the server we are connected to.. */
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printf("All databases:\n");
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printf("---------------------------------\n");
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if (!my_opts->quiet)
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{
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printf("All databases:\n");
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printf("---------------------------------\n");
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}
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pgconn = sql_conn("template1", my_opts);
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sql_exec_dumpdb(pgconn);
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PQfinish(pgconn);
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