generic (jdbc adapter) JDBC API impl for supports_views?

Author: kares

lib/arjdbc/jdbc/adapter.rb

@@ -418,6 +418,11 @@ def current_savepoint_name(create = nil)
         end
       end
 
+      # @override
+      def supports_views?
+        @connection.supports_views?
+      end
+
       # Executes a SQL query in the context of this connection using the bind
       # substitutes.
       # @param sql the query string (or AREL object)

src/java/arjdbc/jdbc/RubyJdbcConnection.java

@@ -1226,6 +1226,27 @@ runtime, caseConvertIdentifierForRails(metaData, columnName)
         });
     }
 
+    @JRubyMethod(name = "supports_views?")
+    public IRubyObject supports_views_p(final ThreadContext context) throws SQLException {
+        return withConnection(context, new Callable<IRubyObject>() {
+            public IRubyObject call(final Connection connection) throws SQLException {
+                final DatabaseMetaData metaData = connection.getMetaData();
+                final ResultSet tableTypes = metaData.getTableTypes();
+                try {
+                    while ( tableTypes.next() ) {
+                        if ( "VIEW".equalsIgnoreCase( tableTypes.getString(1) ) ) {
+                            return context.getRuntime().newBoolean( true );
+                        }
+                    }
+                }
+                finally {
+                    close(tableTypes);
+                }
+                return context.getRuntime().newBoolean( false );
+            }
+        });
+    }
+
     // NOTE: this seems to be not used ... at all ?!
     /*
      * sql, values (array), types (column.type array), name = nil, pk = nil, id_value = nil, sequence_name = nil