diff options
Diffstat (limited to 'contrib/dblink/dblink.c')
| -rw-r--r-- | contrib/dblink/dblink.c | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/contrib/dblink/dblink.c b/contrib/dblink/dblink.c index 234d84cf831..1360c7a00dc 100644 --- a/contrib/dblink/dblink.c +++ b/contrib/dblink/dblink.c @@ -8,7 +8,7 @@ * Darko Prenosil <Darko.Prenosil@finteh.hr> * Shridhar Daithankar <shridhar_daithankar@persistent.co.in> * - * $PostgreSQL: pgsql/contrib/dblink/dblink.c,v 1.69.2.2 2009/01/03 19:57:54 joe Exp $ + * $PostgreSQL: pgsql/contrib/dblink/dblink.c,v 1.69.2.3 2010/02/03 23:01:34 joe Exp $ * Copyright (c) 2001-2008, PostgreSQL Global Development Group * ALL RIGHTS RESERVED; * @@ -94,6 +94,7 @@ static HeapTuple get_tuple_of_interest(Oid relid, int2vector *pkattnums, int16 p static Oid get_relid_from_relname(text *relname_text); static char *generate_relation_name(Oid relid); static void dblink_security_check(PGconn *conn, remoteConn *rconn); +static int get_nondropped_natts(Oid relid); /* Global */ static remoteConn *pconn = NULL; @@ -1391,6 +1392,7 @@ dblink_build_sql_insert(PG_FUNCTION_ARGS) int src_nitems; int tgt_nitems; char *sql; + int nondropped_natts; /* * Convert relname to rel OID. @@ -1419,6 +1421,15 @@ dblink_build_sql_insert(PG_FUNCTION_ARGS) "attributes too large"))); /* + * ensure we don't ask for more pk attributes than we have + * non-dropped columns + */ + nondropped_natts = get_nondropped_natts(relid); + if (pknumatts > nondropped_natts) + ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), + errmsg("number of primary key fields exceeds number of specified relation attributes"))); + + /* * Source array is made up of key values that will be used to locate the * tuple of interest from the local system. */ @@ -1483,6 +1494,7 @@ dblink_build_sql_delete(PG_FUNCTION_ARGS) int2vector *pkattnums = (int2vector *) PG_GETARG_POINTER(1); int32 pknumatts_tmp = PG_GETARG_INT32(2); ArrayType *tgt_pkattvals_arry = PG_GETARG_ARRAYTYPE_P(3); + int nondropped_natts; Oid relid; int16 pknumatts = 0; char **tgt_pkattvals; @@ -1516,6 +1528,15 @@ dblink_build_sql_delete(PG_FUNCTION_ARGS) "attributes too large"))); /* + * ensure we don't ask for more pk attributes than we have + * non-dropped columns + */ + nondropped_natts = get_nondropped_natts(relid); + if (pknumatts > nondropped_natts) + ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), + errmsg("number of primary key fields exceeds number of specified relation attributes"))); + + /* * Target array is made up of key values that will be used to build the * SQL string for use on the remote system. */ @@ -1570,6 +1591,7 @@ dblink_build_sql_update(PG_FUNCTION_ARGS) int32 pknumatts_tmp = PG_GETARG_INT32(2); ArrayType *src_pkattvals_arry = PG_GETARG_ARRAYTYPE_P(3); ArrayType *tgt_pkattvals_arry = PG_GETARG_ARRAYTYPE_P(4); + int nondropped_natts; Oid relid; int16 pknumatts = 0; char **src_pkattvals; @@ -1605,6 +1627,15 @@ dblink_build_sql_update(PG_FUNCTION_ARGS) "attributes too large"))); /* + * ensure we don't ask for more pk attributes than we have + * non-dropped columns + */ + nondropped_natts = get_nondropped_natts(relid); + if (pknumatts > nondropped_natts) + ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), + errmsg("number of primary key fields exceeds number of specified relation attributes"))); + + /* * Source array is made up of key values that will be used to locate the * tuple of interest from the local system. */ @@ -2319,3 +2350,28 @@ dblink_security_check(PGconn *conn, remoteConn *rconn) } } } + +static int +get_nondropped_natts(Oid relid) +{ + int nondropped_natts = 0; + TupleDesc tupdesc; + Relation rel; + int natts; + int i; + + rel = relation_open(relid, AccessShareLock); + tupdesc = rel->rd_att; + natts = tupdesc->natts; + + for (i = 0; i < natts; i++) + { + if (tupdesc->attrs[i]->attisdropped) + continue; + nondropped_natts++; + } + + relation_close(rel, AccessShareLock); + return nondropped_natts; +} + |