[TAJO-595] The same expressions without different alias are not allowed.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: Planner/Optimizer
• Assignee: Hyunsik Choi
• Reporter: Hyunsik Choi
• Created: 12/Feb/14 09:38
• Updated: 17/Feb/14 10:14
• Resolved: 17/Feb/14 10:03

Description

Currently, LogicalPlanner and ProjectionPushDownRule do not allow the same expressions with different alias names. The following query is an example of this restriction.

select l_orderkey + 1 as total1, orderkey + 1 as total2 from ..

The main cause of this bug is that NamedExprManager and TargetListManager only keep 1:1 mapping relationship between alias and expression. This patch changes them to keep 1:N mapping relationship.