mirror of
https://github.com/postgres/postgres.git
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104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/*
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* findoidjoins.c, required pgsql/contrib/pginterface
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "halt.h"
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#include <libpq-fe.h>
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#include "pginterface.h"
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PGresult *attres, *relres;
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int
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main(int argc, char **argv)
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{
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char query[4000];
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char relname[256];
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char relname2[256];
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char attname[256];
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char typname[256];
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int count;
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if (argc != 2)
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halt("Usage: %s database\n", argv[0]);
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connectdb(argv[1], NULL, NULL, NULL, NULL);
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on_error_continue();
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on_error_stop();
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doquery("BEGIN WORK");
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doquery("\
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DECLARE c_attributes BINARY CURSOR FOR \
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SELECT typname, relname, a.attname \
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FROM pg_class c, pg_attribute a, pg_type t \
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WHERE a.attnum > 0 AND \
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relkind = 'r' AND \
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(typname = 'oid' OR \
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typname = 'regproc') AND \
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a.attrelid = c.oid AND \
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a.atttypid = t.oid \
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ORDER BY 2, a.attnum ; \
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");
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doquery("FETCH ALL IN c_attributes");
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attres = get_result();
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doquery("\
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DECLARE c_relations BINARY CURSOR FOR \
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SELECT relname \
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FROM pg_class c \
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WHERE relkind = 'r' AND \
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relname != 'pg_user' \
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ORDER BY 1; \
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");
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doquery("FETCH ALL IN c_relations");
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relres = get_result();
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set_result(attres);
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while (fetch(typname, relname, attname) != END_OF_TUPLES)
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{
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set_result(relres);
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reset_fetch();
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while (fetch(relname2) != END_OF_TUPLES)
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{
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unset_result(relres);
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if (strcmp(typname, "oid") == 0)
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sprintf(query,"\
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DECLARE c_matches BINARY CURSOR FOR \
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SELECT count(*)
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FROM %s t1, %s t2 \
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WHERE t1.%s = t2.oid", relname, relname2, attname);
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else
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sprintf(query,"\
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DECLARE c_matches BINARY CURSOR FOR \
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SELECT count(*)
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FROM %s t1, %s t2 \
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WHERE RegprocToOid(t1.%s) = t2.oid", relname, relname2, attname);
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doquery(query);
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doquery("FETCH ALL IN c_matches");
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fetch(&count);
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if (count != 0)
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printf("Join %s.%s => %s.oid\n", relname, attname, relname2);
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doquery("CLOSE c_matches");
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set_result(relres);
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}
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set_result(attres);
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}
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set_result(relres);
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doquery("CLOSE c_relations");
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PQclear(relres);
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set_result(attres);
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doquery("CLOSE c_attributes");
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PQclear(attres);
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unset_result(attres);
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doquery("COMMIT WORK");
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disconnectdb();
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return 0;
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}
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