Just wondered why I got no results after executing a search via Sphinx and Thinking Sphinx. The problem was, that I used a negative value in a filter attribute and that Sphinx only supports unsigned integers:
Attributes are named. Attribute names are case insensitive. Attributes are not full-text indexed; they are stored in the index as is. Currently supported attribute types are:
- unsigned integers (1-bit to 32-bit wide);
- UNIX timestamps;
- floating point values (32-bit, IEEE 754 single precision);
- string ordinals (specially computed integers);
- strings (since 1.10-beta);
MVA, multi-value attributes (variable-length lists of 32-bit unsigned integers).