figuring out reason for maxClauseCount is set to 1024 error
I've two sets of search indexes. TestIndex (used in our test environment) and ProdIndex(used in PRODUCTION environment). Lucene search query: +date:[20090410184806 TO 20091007184806] works fine for test index but gives this error message for Prod index.
"maxClauseCount is set to 1024"
If I execute following line just before executing search query, then I do not get this error. BooleanQuery.SetMaxClauseCount(Int16.MaxValue); searcher.Search(myQuery, collector);
Am I missing something here? Why am not getting this error in test index?The schema for two indexes are same.They only differ wrt to number of records/data.PROD index has got higher number of records(around 1300) than those in test one (around 950).
Answer
The range query essentially gets transformed to a boolean query with one clause for every possible value, ORed together.
For example, the query +price:[10 to 13] is tranformed to a boolean query
+(price:10 price:11 price:12 price:13)
assuming all the values 10-13 exist in the index.
I suppose, all of your 1300 values fall in the range you have given. So, boolean query has 1300 clauses, which is higher than the default value of 1024. In the test index, the limit of 1024 is not reached as there are only 950 values.