Method Validate

cpp/src/gandiva/expr_validator.cc:51–67

}  // namespace

Status ExprValidator::Validate(const ExpressionPtr& expr) {
  ARROW_RETURN_IF(expr == nullptr,
                  Status::ExpressionValidationError("Expression cannot be null"));

  Node& root = *expr->root();
  ARROW_RETURN_NOT_OK(root.Accept(*this));

  // Ensure root's return type match the expression return type. Type
  // support validation is not required because root type is already supported.
  ARROW_RETURN_IF(!root.return_type()->Equals(*expr->result()->type()),
                  Status::ExpressionValidationError("Return type of root node ",
                                                    root.return_type()->ToString(),
                                                    " does not match that of expression ",
                                                    expr->result()->type()->ToString()));

  return Status::OK();
}

Status ExprValidator::Visit(const FieldNode& node) {
  auto llvm_type = types_->IRType(node.return_type()->id());