6. A computer-implemented system, comprising: a processor coupled to tangible memory, the tangible memory including instructions that, when executed, cause the system to carry out actions including: transmitting a pilot query to an unstructured data system, the pilot query requesting that the unstructured data system identify a first set of one or more fields that the unstructured data system can use to search raw machine data stored in textual form, wherein a field is defined by an extraction rule specifying where to find a subportion of text within a larger segment of text of the raw machine data; receiving the identified first set of one or more fields; receiving, at a query converter, a structured query whose portions all correspond to a structured query language; converting, by the query converter, the structured query into an unstructured query in an unstructured query language associated with searching the raw machine data in the unstructured data system, the unstructured query referencing at least one field in the first set of one or more fields; and transmitting an instruction to the unstructured data system requesting that the unstructured data system execute the unstructured query against the raw machine data in the textual form.
6. A computer-implemented system, comprising: a processor coupled to tangible memory, the tangible memory including instructions that, when executed, cause the system to carry out actions including: transmitting a pilot query to an unstructured data system, the pilot query requesting that the unstructured data system identify a first set of one or more fields that the unstructured data system can use to search raw machine data stored in textual form, wherein a field is defined by an extraction rule specifying where to find a subportion of text within a larger segment of text of the raw machine data; receiving the identified first set of one or more fields; receiving, at a query converter, a structured query whose portions all correspond to a structured query language; converting, by the query converter, the structured query into an unstructured query in an unstructured query language associated with searching the raw machine data in the unstructured data system, the unstructured query referencing at least one field in the first set of one or more fields; and transmitting an instruction to the unstructured data system requesting that the unstructured data system execute the unstructured query against the raw machine data in the textual form. 8. The computer-implemented system of claim 6 , wherein requesting that the unstructured data system identify the first set of one or more fields that the unstructured data system can use to search the raw machine data causes the unstructured data system to identify the first set of one or more fields from a subset of the raw machine data that the unstructured data system can search.