ParameterMetaData now also returns the right data type for most

        conditions, as in WHERE ID=?.

h2/src/main/org/h2/expression/Comparison.java

@@ -136,10 +136,18 @@ public class Comparison extends Condition {
         } else {
             right = right.optimize(session);
             try {
-                if (left instanceof ExpressionColumn && right.isConstant()) {
+                if (left instanceof ExpressionColumn) {
+                    if (right.isConstant()) {
                         right = getCast(right, left.getType(), left.getPrecision(), left.getScale(), left.getDisplaySize(), session);
-                } else if (right instanceof ExpressionColumn && left.isConstant()) {
+                    } else if (right instanceof Parameter) {
+                        ((Parameter) right).setColumn(((ExpressionColumn) left).getColumn());
+                    }
+                } else if (right instanceof ExpressionColumn) {
+                    if (left.isConstant()) {
                         left = getCast(left, right.getType(), right.getPrecision(), right.getScale(), right.getDisplaySize(), session);
+                    } else if (left instanceof Parameter) {
+                        ((Parameter) left).setColumn(((ExpressionColumn) right).getColumn());
+                    }
                 }
             } catch (SQLException e) {
                 int code = e.getErrorCode();