Fix pg_dump for non-babelfish databases (babelfish-for-postgresql#237)

Recently, we introduced a change where we mistakenly disallowed pg_dump
for a non-Babelfish databases. This commit fixes this issue.

Task: MANFRED-19333

Signed-off-by: Rishabh Tanwar [email protected]

src/bin/pg_dump/dump_babel_utils.c

@@ -878,15 +878,9 @@ prepareForBabelfishDatabaseDump(Archive *fout, SimpleStringList *schema_include_
 	int 		ntups;
 	int 		i;
 
-	if (fout->dopt->binary_upgrade)
+	if (!isBabelfishDatabase(fout) || fout->dopt->binary_upgrade)
 		return;
 
-	if (!isBabelfishDatabase(fout))
-	{
-		pg_log_error("\"%s\" is not a Babelfish Database.", fout->dopt->cparams.dbname);
-		exit_nicely(1);
-	}
-
 	query = createPQExpBuffer();
 	/*
 	 * Get oids of all the Babelfish catalog configuration tables.
@@ -921,6 +915,7 @@ prepareForBabelfishDatabaseDump(Archive *fout, SimpleStringList *schema_include_
 	PQclear(res);
 	destroyPQExpBuffer(query);
 
+	/* Return if not logical database dump, continue otherwise. */
 	if (bbf_db_name == NULL)
 		return;
 	/*
@@ -1153,7 +1148,7 @@ fixCursorForBbfCatalogTableData(Archive *fout, TableInfo *tbinfo, PQExpBuffer bu
 	 */
 
 	if (!isBabelfishDatabase(fout) || !isBabelfishConfigTable(tbinfo))
-			return;
+		return;
 
 	if (bbf_db_name != NULL)
 		is_builtin_db = (pg_strcasecmp(bbf_db_name, "master") == 0 ||
@@ -1370,6 +1365,9 @@ getMbstrlen(const char *mbstr, Archive *fout)
  * fixCursorForBbfSqlvariantTableData:
  * Prepare custom cursor for all Babelfish tables with atleast one sql_variant
  * datatype column to correctly dump sql_variant data.
+ *
+ * Returns total number of fields in the cursor which is the sum of existing
+ * nfields and the extra fields added for each sql_variant column.
  */
 int
 fixCursorForBbfSqlvariantTableData( Archive *fout,