A method and system generates an index for efficient processing of search queries. The system receives documents. Each document is of a document type. The system identifies a template configured for the document type. The template comprises fields arranged in a template structure. The system determines whether the template structure matches the document structure. If the template structure does not match the document structure, the system updates the template by matching the template structure to the document structure. The system generates an index from the updated template with the document data. The system stores the index in an index database. The system uses the index for efficient execution of search queries.