[libgda: 1/2] gda-postgresql-ddl.c: Error reporting added

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 26115e5b1ac3d3b10f3bcb5139cc845d798c55b0
Author: Pavlo Solntsev <p sun fun gmail com>
Date:   Fri Jan 31 00:16:17 2020 -0600

    gda-postgresql-ddl.c: Error reporting added
    
    An error will be reported if GdaDataHandler instance
    has an invalid type.

 providers/postgres/gda-postgres-ddl.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/providers/postgres/gda-postgres-ddl.c b/providers/postgres/gda-postgres-ddl.c
index ed4f111a6..15f59047c 100644
--- a/providers/postgres/gda-postgres-ddl.c
+++ b/providers/postgres/gda-postgres-ddl.c
@@ -1074,7 +1074,15 @@ gda_postgres_render_CREATE_USER (GdaServerProvider *provider, GdaConnection *cnc
                        else
                                g_object_ref (dh);
                
-                       g_assert (dh); // If fails, the type in dh is not implemented. It is a bug.
+                       if (!dh) {
+                               g_set_error (error,
+                                            GDA_SERVER_OPERATION_ERROR,
+                                            GDA_SERVER_OPERATION_INCORRECT_VALUE_ERROR,
+                                            "%s: %s",
+                                            G_STRLOC,
+                                            _ ("Dataholder type is unknown. Report this as a bug."));
+                               return NULL;
+                       }
                        g_string_append (string, " VALID UNTIL ");
                        tmp = gda_data_handler_get_sql_from_value (dh, value);
                        g_object_unref (dh);