[LUCENE-4103] AnalyzerQueryNodeProcessor throws a class cast exception with the RegexpQueryNode

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0-ALPHA
• Fix Version/s: 4.0-ALPHA, 6.0
• Component/s: modules/queryparser
• Lucene Fields: New, Patch Available
• Assignee: Unassigned
• Reporter: Daniel Truemper
• Created: 03/Jun/12 18:16
• Updated: 09/May/16 18:30
• Resolved: 05/Jun/12 23:03

Description

When using the flexible query parser with the regular expression syntax the processing pipeline fails with the following class cast exception:

java.lang.ClassCastException: org.apache.lucene.queryparser.flexible.standard.nodes.RegexpQueryNode cannot be cast to org.apache.lucene.queryparser.flexible.core.nodes.FieldQueryNode
	at __randomizedtesting.SeedInfo.seed([34AF003D9388DF45:CB5F8BB4EE483FEE]:0)
	at org.apache.lucene.queryparser.flexible.standard.processors.AnalyzerQueryNodeProcessor.postProcessNode(AnalyzerQueryNodeProcessor.java:114)

A very simple patch is attached that will simply add the RegexpQueryNode to the nodes that should not get processed by the AnalyzerQueryNodeProcessor. I think this means that the regular expression is not analyzed, which should be ok!?