[libgda] SQL rendering correction

[Vivien Malerba <vivien src gnome org>]

commit f4f6fb8fc0df327d747d39e38b3155fa05e2b1eb
Author: Vivien Malerba <malerba gnome-db org>
Date:   Thu Dec 29 18:43:19 2011 +0100

    SQL rendering correction
    
    correctly enclose between parenthesis SELECT statements in expressions

 libgda/gda-statement.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/libgda/gda-statement.c b/libgda/gda-statement.c
index 5fd2a7c..f5c92cf 100644
--- a/libgda/gda-statement.c
+++ b/libgda/gda-statement.c
@@ -1729,7 +1729,11 @@ default_render_function (GdaSqlFunction *func, GdaSqlRenderingContext *context,
 			g_string_append (string, ", ");
 		str = context->render_expr (list->data, context, NULL, NULL, error);
 		if (!str) goto err;
+		if (((GdaSqlExpr*) list->data)->select)
+			g_string_append_c (string, '(');
 		g_string_append (string, str);
+		if (((GdaSqlExpr*) list->data)->select)
+			g_string_append_c (string, ')');
 		g_free (str);
 	}
 	g_string_append_c (string, ')');