Oracle® Text Reference 10g Release 1 (10.1) Part No. B10730-01 December 2003 Oracle Text Reference, 10g Release 1 (10.1) Part No. B10730-01 Copyright © 2003 Oracle Corporation. All rights reserved. Primary Author: Colin McGregor Contributors: Omar Alonso, Shamim Alpha, Edwin Balthes, Steve Buxton, Chung-Ho Chen, Jack Chen, Yun Cheng, Michele Cyran, Paul Dixon, Mohammad Faisal, Roger Ford, Elena Huang, Garrett Kaminaga, Ji Sun Kang, Ciya Liao, Wesley Lin, Bryn Llewellyn, Yasuhiro Matsuda, Valarie Moore, Takeshi Okawa, Gerda Shank, Qunong Xiao, Steve Yang The Programs (which include both the software and documentation) contain proprietary information of Oracle Corporation; they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent and other intellectual and industrial property laws. 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Contents Send Us Your Comments ............................................................................................................... xvii Preface.......................................................................................................................................................... xix Audience ............................................................................................................................................... xix Organization......................................................................................................................................... xix Related Documentation ..................................................................................................................... xxii Conventions........................................................................................................................................ xxiii Documentation Accessibility ............................................................................................................ xxv What's New in Oracle Text? ........................................................................................................ xxvii Oracle Database 10g R1 New Features .......................................................................................... xxvii Security Improvements.................................................................................................................... xxvii Classification and Clustering .......................................................................................................... xxvii Indexing ............................................................................................................................................ xxviii Language Features............................................................................................................................. xxxi Querying ............................................................................................................................................ xxxii Document Services .......................................................................................................................... xxxiii 1 SQL Statements and Operators ALTER INDEX .................................................................................................................................... 1-2 ALTER TABLE: Supported Partitioning Statements.................................................................. 1-18 CATSEARCH .................................................................................................................................... 1-25 CONTAINS........................................................................................................................................ 1-34 CREATE INDEX ............................................................................................................................... 1-43 iii DROP INDEX ................................................................................................................................... 1-65 MATCHES ......................................................................................................................................... 1-66 MATCH_SCORE............................................................................................................................... 1-68 SCORE................................................................................................................................................. 1-69 2 Oracle Text Indexing Elements Overview............................................................................................................................................... 2-1 Creating Preferences..................................................................................................................... 2-2 Datastore Types .................................................................................................................................. 2-3 DIRECT_DATASTORE ............................................................................................................... 2-3 MULTI_COLUMN_DATASTORE............................................................................................. 2-4 DETAIL_DATASTORE ............................................................................................................. 2-8 FILE_DATASTORE .................................................................................................................... 2-10 URL_DATASTORE ................................................................................................................... 2-12 USER_DATASTORE ................................................................................................................. 2-15 NESTED_DATASTORE............................................................................................................. 2-18 Filter Types......................................................................................................................................... 2-21 CHARSET_FILTER .................................................................................................................... 2-21 INSO_FILTER ............................................................................................................................. 2-23 NULL_FILTER ........................................................................................................................... 2-27 MAIL_FILTER ............................................................................................................................. 2-27 USER_FILTER ............................................................................................................................. 2-30 PROCEDURE_FILTER............................................................................................................... 2-31 Lexer Types......................................................................................................................................... 2-36 BASIC_LEXER............................................................................................................................. 2-36 MULTI_LEXER ........................................................................................................................... 2-46 CHINESE_VGRAM_LEXER ..................................................................................................... 2-48 CHINESE_LEXER......................................................................................................................