[libgda] Docs: gda_sql_builder_join_add_field(): Clarify

[Murray Cumming <murrayc src gnome org>]

commit 09ef8c4d502eb75056e49035bc9e0269ce3393b5
Author: Murray Cumming <murrayc murrayc com>
Date:   Sat Oct 16 14:54:10 2010 +0200

    Docs: gda_sql_builder_join_add_field(): Clarify

 libgda/gda-sql-builder.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/libgda/gda-sql-builder.c b/libgda/gda-sql-builder.c
index dee031d..f8e9f64 100644
--- a/libgda/gda-sql-builder.c
+++ b/libgda/gda-sql-builder.c
@@ -1361,8 +1361,8 @@ gda_sql_builder_select_join_targets (GdaSqlBuilder *builder,
  * @join_id: the ID of the join to modify (not %0)
  * @field_name: the name of the field to use in the join condition (not %NULL)
  *
- * Alter a joins in a SELECT statement to make its condition on the field which name
- * is @field_name
+ * Alter a join in a SELECT statement to make its condition use equal field 
+ * values in the fields named @field_name in both tables, via the USING keyword.
  *
  * Returns: the ID of the new join, or %0 if there was an error
  *