Abstract: A method and apparatus for managing numerous messages are provided. The method includes: A. pulling, by a client terminal, a message index list from a server; B. pulling, by the client terminal, message bodies corresponding to message indexes in the message index list in batches; C. managing, by the client terminal, the pulled message bodies and message indexes by using a message pool mode; D. after receiving a finish indication triggered by a user, storing, by the client terminal, the message indexes and the message bodies in the message pool to a local disk. By using the present invention, numerous messages are managed.

Abstract: An e-book server creates index information for encrypted e-book content. The index information is used by a reader module to efficiently search the encrypted content. To create the index information, the e-book server identifies logical partitions of an e-book that include phrases, and creates encrypted segments including a portion of the e-book content that is not necessarily aligned with the logical partitions of the e-book. The e-book server then stores index information including a mapping between the encrypted segments and the phrases located in the logical partitions.

Abstract: A method and system for creating an index of content without interfering with the source of the content includes an offline content indexing system that creates an index of content from an offline copy of data. The system may associate additional properties or tags with data that are not part of traditional indexing of content, such as the time the content was last available or user attributes associated with the content. Users can search the created index to locate content that is no longer available or based on the associate attributes.

Abstract: A system, method, and computer program product are provided for improving performance of positional text conditions in concert with bitmap-based conditions. This is accomplished, for example, by focusing positional text condition evaluation to candidate rows based on a bitmap resulting from application of a prior condition. Additionally, the result of a positional text condition may itself be provided in the form of a bitmap to accelerate further bitmap-based condition processing.

Abstract: Systems, methods, and other embodiments associated with text indexing for updateable tokenized text are described. One example method includes receiving revised tokenized text intended to replace existing tokenized text in an indexed document. Token location information corresponding to the revised tokenized text is stored in an allocated free space portion of a text index posting.

Abstract: A disappearing index allows faster processing of a database query without the startup time of a prior art sparse index. The disappearing index starts as a full index but is trimmed of index values that point to a row in the table that is not selected by the query. Thus the traditional index disappears as it becomes a sparse index tailored to the query. The query is able to execute faster using the now sparse index since the target database table is not accessed for duplicate values in the base table of the query. The query optimizer may determine to use a disappearing index based on estimates of the number of duplicate values in the base table. When the query is complete, the created disappearing table may be discarded or used for other queries that match the selection of the query that created the disappearing index.

Abstract: When a collation result of user information is not matched, user information in one system need be prevented from being leaked to the other system. When hash values for an item serving as a key of correlation match with each other between a plurality of user information lists, it is determined that relevance is present, and then user information of the corresponding user is correlated.