[ARROW-4203] [Gandiva] use aliases when building expressions to simplify tests

• Type: Task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: C++ - Gandiva
• External issue URL: https://github.com/apache/arrow/issues/20783
• Assignee: Unassigned
• Reporter: Pindikura Ravindra
• Created: 08/Jan/19 18:40
• Updated: 11/Jan/23 07:32

Description

// code placeholder
auto node_c = TreeExprBuilder::MakeField(field_c);
auto if_node = TreeExprBuilder::MakeIf(node_c, node_a, node_b, decimal_type);

auto expr = TreeExprBuilder::MakeExpression(if_node, field_result);

@wesm suggested that code like the above can be simplified with aliases :

gandiva::expr(gandiva::if_(gandiva::field(...))