@Override
public void meet(Exists node) throws RuntimeException {
// TODO: need to make sure that variables of the parent are visible in the subquery
// - pattern names need to be unique even in subqueries
// - variable lookup for expressions in the subquery need to refer to the parent
SQLBuilder sq_builder =
new SQLBuilder(
node.getSubQuery(),
parent.getBindings(),
parent.getDataset(),
parent.getConverter(),
parent.getDialect(),
"_",
Collections.EMPTY_SET,
copyVariables(parent.getVariables()));
builder.append("EXISTS (").append(sq_builder.build()).append(")");
}
