Mercurial > urweb
diff src/mysql.sml @ 1600:8128fcb2d4a4
Fix catalog querying about empty tables
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Fri, 18 Nov 2011 17:44:12 -0500 |
| parents | 969b90b1f2f9 |
| children | 3e7c7e200713 |
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--- a/src/mysql.sml Fri Nov 18 17:17:22 2011 -0500 +++ b/src/mysql.sml Fri Nov 18 17:44:12 2011 -0500 @@ -83,26 +83,28 @@ val q' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE ", both, " AND (", - String.concatWith " OR " - (map (fn (x, t) => - String.concat ["(column_name IN ('uw_", - CharVector.map - Char.toLower (ident x), - "', 'uw_", - ident x, - "') AND data_type = '", - p_sql_type_base t, - "'", - if checkNullable then - (" AND is_nullable = '" - ^ (if isNotNull t then - "NO" - else - "YES") - ^ "'") - else - "", - ")"]) xts), + case String.concatWith " OR " + (map (fn (x, t) => + String.concat ["(column_name IN ('uw_", + CharVector.map + Char.toLower (ident x), + "', 'uw_", + ident x, + "') AND data_type = '", + p_sql_type_base t, + "'", + if checkNullable then + (" AND is_nullable = '" + ^ (if isNotNull t then + "NO" + else + "YES") + ^ "'") + else + "", + ")"]) xts) of + "" => "FALSE" + | s => s, ")"] val q'' = String.concat ["SELECT COUNT(*) FROM information_schema.columns WHERE ",