Oracle Text. Reference by McGregor C.

By McGregor C.

This handbook offers reference details for Oracle textual content. Use it as a reference for developing Oracle textual content indexes, for issuing Oracle textual content queries, for featuring records, and for utilizing the Oracle textual content PL/SQL programs.

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Extra info for Oracle Text. Reference

Example text

When you optimize in full mode, you can optimize the whole index or a portion. This method compacts rows and removes old data (deleted rows). Note: Optimizing in full mode runs even when there are no deleted document rows. This is useful when you need to optimize time-limited batches with the maxtime parameter. You use the maxtime parameter to specify in minutes the time Oracle is to spend on the optimization operation. Oracle starts the optimization where it left off and optimizes until complete or until the time limit has been reached, whichever comes first.

SQL Statements and Operators 1-9 ALTER INDEX ■ You cannot have the same tag for two different sections. ■ Section names for zone, field, and attribute sections cannot intersect. ■ You cannot exceed 64 field sections. ■ You cannot add stop sections to basic, HTML, XML, or news section groups. ■ SENTENCE and PARAGRAPH are reserved section names. Examples Resuming Failed Index The following statement resumes the indexing operation on newsindex with 2 megabytes of memory: ALTER INDEX newsindex REBUILD PARAMETERS(’resume memory 2M’); Rebuilding an Index The following statement rebuilds the index, replacing the stoplist preference with new_stop.

Sync [memory memsize] Note: This ALTER INDEX operation will not be supported in future releases. SYNC_INDEX. Synchronizes the index. You can optionally specify the amount of runtime memory to use with memsize. You synchronize the index when you have DML operations on your base table. Note: This ALTER INDEX operation applies only to context and ctxrule indexes. It does not apply to ctxcat indexes. Memory Considerations The memory parameter memsize specifies the amount of memory Oracle uses for the ALTER INDEX operation before flushing the index to disk.

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