The PostgreSQL 9.0 Reference Manual - Volume 1A - SQL Language Reference by The PostgreSQL Global Development Group Paperback (6"x9"), 454 pages ISBN 9781906966041 RRP £14.95 ($19.95) Sales of this book support the PostgreSQL project! Get a printed copy>>>

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6.11 Text Search Types

PostgreSQL provides two data types that are designed to support full text search, which is the activity of searching through a collection of natural-language documents to locate those that best match a query. The tsvector type represents a document in a form optimized for text search; the tsquery type similarly represents a text query. section 10 Full Text Search provides a detailed explanation of this facility, and section 7.13 Text Search Functions and Operators summarizes the related functions and operators.