libpq's query to get the OIDs of large-object support functions was not

schema-safe.  Make it so, and improve the internal support for knowledge
of server version.

diff --git a/src/interfaces/libpq/fe-exec.c b/src/interfaces/libpq/fe-exec.c
index eae1b764abbce2bd68e435ebb5113cdda1909195..d2ad75bb23b591662ce46f11651e1b0a72c91bef 100644 (file)
--- a/src/interfaces/libpq/fe-exec.c
+++ b/src/interfaces/libpq/fe-exec.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.156 2003/12/28 17:29:41 tgl Exp $
+ *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.157 2004/03/05 01:53:59 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -609,12 +609,28 @@ pqSaveParameterStatus(PGconn *conn, const char *name, const char *value)
 
    /*
     * Special hacks: remember client_encoding as a numeric value, and
-    * remember at least the first few bytes of server version.
+    * convert server version to a numeric form as well.
     */
    if (strcmp(name, "client_encoding") == 0)
        conn->client_encoding = pg_char_to_encoding(value);
-   if (strcmp(name, "server_version") == 0)
-       StrNCpy(conn->sversion, value, sizeof(conn->sversion));
+   else if (strcmp(name, "server_version") == 0)
+   {
+       int         cnt;
+       int         vmaj,
+                   vmin,
+                   vrev;
+
+       cnt = sscanf(value, "%d.%d.%d", &vmaj, &vmin, &vrev);
+
+       if (cnt < 2)
+           conn->sversion = 0;         /* unknown */
+       else
+       {
+           if (cnt == 2)
+               vrev = 0;
+           conn->sversion = (100 * vmaj + vmin) * 100 + vrev;
+       }
+   }
 }
 
 

diff --git a/src/interfaces/libpq/fe-lobj.c b/src/interfaces/libpq/fe-lobj.c
index 16d4970d9eb32fa7c867a65229894bfff90c4348..e9ef61358ac8a6d23f3f73555ac51bf419922039 100644 (file)
--- a/src/interfaces/libpq/fe-lobj.c
+++ b/src/interfaces/libpq/fe-lobj.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-lobj.c,v 1.47 2004/01/26 22:35:32 tgl Exp $
+ *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-lobj.c,v 1.48 2004/03/05 01:53:59 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -534,6 +534,7 @@ lo_initialize(PGconn *conn)
    PGresult   *res;
    PGlobjfuncs *lobjfuncs;
    int         n;
+   const char *query;
    const char *fname;
    Oid         foid;
 
@@ -550,17 +551,34 @@ lo_initialize(PGconn *conn)
    MemSet((char *) lobjfuncs, 0, sizeof(PGlobjfuncs));
 
    /*
-    * Execute the query to get all the functions at once
+    * Execute the query to get all the functions at once.  In 7.3 and later
+    * we need to be schema-safe.
     */
-   res = PQexec(conn, "select proname, oid from pg_proc    \
-           where proname = 'lo_open'   \
-          or proname = 'lo_close'  \
-          or proname = 'lo_creat'  \
-          or proname = 'lo_unlink' \
-          or proname = 'lo_lseek'  \
-          or proname = 'lo_tell'   \
-          or proname = 'loread'    \
-          or proname = 'lowrite'");
+   if (conn->sversion >= 70300)
+       query = "select proname, oid from pg_catalog.pg_proc "
+           "where proname in ("
+           "'lo_open', "
+           "'lo_close', "
+           "'lo_creat', "
+           "'lo_unlink', "
+           "'lo_lseek', "
+           "'lo_tell', "
+           "'loread', "
+           "'lowrite') "
+           "and pronamespace = (select oid from pg_catalog.pg_namespace "
+           "where nspname = 'pg_catalog')";
+   else
+       query = "select proname, oid from pg_proc "
+           "where proname = 'lo_open' "
+           "or proname = 'lo_close' "
+           "or proname = 'lo_creat' "
+           "or proname = 'lo_unlink' "
+           "or proname = 'lo_lseek' "
+           "or proname = 'lo_tell' "
+           "or proname = 'loread' "
+           "or proname = 'lowrite'";
+
+   res = PQexec(conn, query);
    if (res == NULL)
    {
        free(lobjfuncs);

diff --git a/src/interfaces/libpq/fe-protocol2.c b/src/interfaces/libpq/fe-protocol2.c
index 8c214fa8e9241b448a547dfa9322280b2ebe0ad5..369481b3386c6ef9216660f57c050c48219fb6f1 100644 (file)
--- a/src/interfaces/libpq/fe-protocol2.c
+++ b/src/interfaces/libpq/fe-protocol2.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-protocol2.c,v 1.9 2003/11/29 19:52:12 pgsql Exp $
+ *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-protocol2.c,v 1.10 2004/03/05 01:53:59 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -178,7 +178,9 @@ pqSetenvPoll(PGconn *conn)
                     * default in a 7.3 server.
                     *
                     * Note: version() exists in all
-                    * protocol-2.0-supporting backends.
+                    * protocol-2.0-supporting backends.  In 7.3 it would
+                    * be safer to write pg_catalog.version(), but we can't
+                    * do that without causing problems on older versions.
                     */
                    if (!PQsendQuery(conn, "begin; select version(); end"))
                        goto error_return;
@@ -258,8 +260,9 @@ pqSetenvPoll(PGconn *conn)
                     * in 7.3 servers where we need to prevent
                     * autocommit-off from starting a transaction anyway.
                     */
-                   if (strncmp(conn->sversion, "7.3", 3) == 0)
-                       query = "begin; select pg_client_encoding(); end";
+                   if (conn->sversion >= 70300 &&
+                       conn->sversion < 70400)
+                       query = "begin; select pg_catalog.pg_client_encoding(); end";
                    else
                        query = "select pg_client_encoding()";
                    if (!PQsendQuery(conn, query))

diff --git a/src/interfaces/libpq/libpq-int.h b/src/interfaces/libpq/libpq-int.h
index 97cd55eaa8ad93e9ed3dfe42b2091999c444889d..f2acf2af20a2727f2fdc157f02303d956a0e80a7 100644 (file)
--- a/src/interfaces/libpq/libpq-int.h
+++ b/src/interfaces/libpq/libpq-int.h
@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.84 2004/01/09 02:02:43 momjian Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.85 2004/03/05 01:53:59 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -280,7 +280,7 @@ struct pg_conn
    SockAddr    laddr;          /* Local address */
    SockAddr    raddr;          /* Remote address */
    ProtocolVersion pversion;   /* FE/BE protocol version in use */
-   char        sversion[8];    /* The first few bytes of server version */
+   int         sversion;       /* server version, e.g. 70401 for 7.4.1 */
 
    /* Transient state needed while establishing connection */
    struct addrinfo *addrlist;  /* list of possible backend addresses */