@Override
public void meet(SqlEq node) throws RuntimeException {
super.meet(node);
SqlExpr left = node.getLeftArg();
SqlExpr right = node.getRightArg();
if (left instanceof SqlNull || right instanceof SqlNull) {
replace(node, new SqlNull());
} else if (left instanceof SqlConstant<?> && right instanceof SqlConstant<?>) {
SqlConstant<?> l = (SqlConstant<?>) left;
SqlConstant<?> r = (SqlConstant<?>) right;
if (l.getValue().equals(r.getValue())) {
replace(node, new TrueValue());
} else {
replace(node, new FalseValue());
}
}
}
@Override
public void meet(SqlLowerCase node) throws RuntimeException {
super.meet(node);
if (node.getArg() instanceof SqlNull) {
replace(node, new SqlNull());
} else if (node.getArg() instanceof SqlConstant) {
SqlConstant arg = (SqlConstant) node.getArg();
String lower = arg.getValue().toString().toLowerCase(Locale.US);
replace(node, str(lower));
}
}