[CALCITE-4043] Improve IllegalArgumentException message in RelBuilder#field

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 1.23.0
• Fix Version/s: 1.24.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Ruben Q L
• Reporter: Ruben Q L
• Created: 04/Jun/20 12:09
• Updated: 25/Jul/20 14:59
• Resolved: 04/Jun/20 15:01

Description

The RelBuilder#field method that creates a RexNode based on alias + fieldName throws an IllegalArgumentException if the corresponding field is not found:

  public RexNode field(int inputCount, String alias, String fieldName) {
    ...
    throw new IllegalArgumentException("no aliased field found; fields are: " + fields);
  }

However, the exception message does not include the requested alias & fieldName, which is relevant information, definitively useful for troubleshooting.

Issue Links

• links to: PR#2003