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1. 发明专利

DE3588212D1 未知
公开(公告)号：DE3588212D1
公开(公告)日：1999-06-17
申请号：DE3588212
申请日：1985-08-08
申请人： HITACHI LTD , TANAKA YUZURU
发明人： TANAKA YUZURU , YAMAMOTO AKIRA , TSUCHIDA MASASHI
IPC分类号： G06F7/36 , G06F15/78 , G06F17/30
摘要： In order to perform merging/sorting which can flexibly cope with the variation of a data length, data is divided every predetermined number of bits (m bits), a plurality of processors each of which process the m-bit data are connected, and the alteration of the data length can be coped with by changing the number of the connected processors. On this occasion, in order to permit reduction in the quantity of information items which are exchanged among the respective processors, the merging/sorting is so carried out that the processor processing certain m bits receives input information from only the processor processing immediately upper m bits and delivers output information to only the processor processing immediately lower m bits. Besides, in order to perform searching, each of key words to be searched is subjected to m-bit slicing and a search key and data in areas storing the m-bit sliced key words are compared so as to find areas storing key words which agree with the search key.

2. 发明专利

DE68927413T2 未知
公开(公告)号：DE68927413T2
公开(公告)日：1997-05-22
申请号：DE68927413
申请日：1989-01-25
申请人： HITACHI LTD
发明人： TSUCHIDA MASASHI , OHMACHI KAZUHIKO
IPC分类号： G06F12/00 , G06F17/30
摘要： A method for processing a database for analyzing a query to the database from a user to determine an internal processing procedure therefor and executing it (910) comprises the steps of preparing single or a plurality of internal processing procedures based on analysis result of the query including a variable inputted in a preprocess step and statistical information of a database system (940), selecting an optimum one of the internal processing procedures based on a value substituted for the variable of the query in a query execution stage and the statistical information of the database system (970), and executing the query in accordance with the selected internal processing procedure (980).

3. 发明专利

DE3587176T2 未知
公开(公告)号：DE3587176T2
公开(公告)日：1993-07-01
申请号：DE3587176
申请日：1985-08-08
申请人： HITACHI LTD , TANAKA YUZURU
发明人： TANAKA YUZURU , YAMAMOTO AKIRA , TSUCHIDA MASASHI
IPC分类号： G06F7/36 , G06F15/78 , G06F17/30 , G06F15/40 , G06F15/76 , G06F7/32
摘要： In order to perform merging/sorting which can flexibly cope with the variation of a data length, data is divided every predetermined number of bits (m bits), a plurality of processors each of which process the m-bit data are connected, and the alteration of the data length can be coped with by changing the number of the connected processors. On this occasion, in order to permit reduction in the quantity of information items which are exchanged among the respective processors, the merging/sorting is so carried out that the processor processing certain m bits receives input information from only the processor processing immediately upper m bits and delivers output information to only the processor processing immediately lower m bits. Besides, in order to perform searching, each of key words to be searched is subjected to m-bit slicing and a search key and data in areas storing the m-bit sliced key words are compared so as to find areas storing key words which agree with the search key.

4. 发明专利

DE3588212T2 未知
公开(公告)号：DE3588212T2
公开(公告)日：1999-12-30
申请号：DE3588212
申请日：1985-08-08
申请人： HITACHI LTD , TANAKA YUZURU
发明人： TANAKA YUZURU , YAMAMOTO AKIRA , TSUCHIDA MASASHI
IPC分类号： G06F7/36 , G06F15/78 , G06F17/30
摘要： In order to perform merging/sorting which can flexibly cope with the variation of a data length, data is divided every predetermined number of bits (m bits), a plurality of processors each of which process the m-bit data are connected, and the alteration of the data length can be coped with by changing the number of the connected processors. On this occasion, in order to permit reduction in the quantity of information items which are exchanged among the respective processors, the merging/sorting is so carried out that the processor processing certain m bits receives input information from only the processor processing immediately upper m bits and delivers output information to only the processor processing immediately lower m bits. Besides, in order to perform searching, each of key words to be searched is subjected to m-bit slicing and a search key and data in areas storing the m-bit sliced key words are compared so as to find areas storing key words which agree with the search key.

5. 发明专利

DE3750277D1 未知
公开(公告)号：DE3750277D1
公开(公告)日：1994-09-01
申请号：DE3750277
申请日：1987-02-10
申请人： HITACHI LTD
发明人： OHSONE TADASHI , YAMAMOTO AKIRA , KITAJIMA HIROYUKI , TSUCHIDA MASASHI , TANIGUCHI NOBUHIRO , YAMASHITA YOSHIAKI
IPC分类号： G06F17/30 , G06F15/40
摘要： A skip table (200) is prepared from which a state of a subsequent symbol string and an address of one or plural symbols to be subsequently inputted can be readily determined by making reference to a set of a current symbol string search state and one or plural symbols to be subsequently inputted of the symbol string. When executing searching for the symbol string, data stored in the skip table are looked up to assure the symbol string search by inputting only a minimized number of necessary characters of the symbol string. Necessity of inputting all the characters of the symbol string for searching is eliminated and the processing speed can be increased considerably. A plurality of symbol strings may be searched for.

6. 发明专利

DE68927413D1 未知
公开(公告)号：DE68927413D1
公开(公告)日：1996-12-12
申请号：DE68927413
申请日：1989-01-25
申请人： HITACHI LTD
发明人： TSUCHIDA MASASHI , OHMACHI KAZUHIKO
IPC分类号： G06F12/00 , G06F17/30
摘要： A method for processing a database for analyzing a query to the database from a user to determine an internal processing procedure therefor and executing it (910) comprises the steps of preparing single or a plurality of internal processing procedures based on analysis result of the query including a variable inputted in a preprocess step and statistical information of a database system (940), selecting an optimum one of the internal processing procedures based on a value substituted for the variable of the query in a query execution stage and the statistical information of the database system (970), and executing the query in accordance with the selected internal processing procedure (980).

7. 发明专利

DE3750277T2 未知
公开(公告)号：DE3750277T2
公开(公告)日：1994-11-17
申请号：DE3750277
申请日：1987-02-10
申请人： HITACHI LTD
发明人： OHSONE TADASHI , YAMAMOTO AKIRA , KITAJIMA HIROYUKI , TSUCHIDA MASASHI , TANIGUCHI NOBUHIRO , YAMASHITA YOSHIAKI
IPC分类号： G06F17/30 , G06F15/40
摘要： A skip table (200) is prepared from which a state of a subsequent symbol string and an address of one or plural symbols to be subsequently inputted can be readily determined by making reference to a set of a current symbol string search state and one or plural symbols to be subsequently inputted of the symbol string. When executing searching for the symbol string, data stored in the skip table are looked up to assure the symbol string search by inputting only a minimized number of necessary characters of the symbol string. Necessity of inputting all the characters of the symbol string for searching is eliminated and the processing speed can be increased considerably. A plurality of symbol strings may be searched for.

8. 发明专利

DE3587176D1 未知
公开(公告)号：DE3587176D1
公开(公告)日：1993-04-15
申请号：DE3587176
申请日：1985-08-08
申请人： HITACHI LTD , TANAKA YUZURU
发明人： TANAKA YUZURU , YAMAMOTO AKIRA , TSUCHIDA MASASHI
IPC分类号： G06F7/36 , G06F15/78 , G06F17/30 , G06F15/40 , G06F15/76 , G06F7/32
摘要： In order to perform merging/sorting which can flexibly cope with the variation of a data length, data is divided every predetermined number of bits (m bits), a plurality of processors each of which process the m-bit data are connected, and the alteration of the data length can be coped with by changing the number of the connected processors. On this occasion, in order to permit reduction in the quantity of information items which are exchanged among the respective processors, the merging/sorting is so carried out that the processor processing certain m bits receives input information from only the processor processing immediately upper m bits and delivers output information to only the processor processing immediately lower m bits. Besides, in order to perform searching, each of key words to be searched is subjected to m-bit slicing and a search key and data in areas storing the m-bit sliced key words are compared so as to find areas storing key words which agree with the search key.

9. 发明专利

JP2009037359A Data registration retrieval method, data registration retrieval program, and database system 审中-公开
标题翻译：数据注册检索方法，数据注册检索程序和数据库系统
公开(公告)号：JP2009037359A
公开(公告)日：2009-02-19
申请号：JP2007200116
申请日：2007-07-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OSHIMA MIHOSHI , HARA NORIHIRO , MARUYAMA TAKEO , TSUCHIDA MASASHI
IPC分类号： G06F17/30
CPC分类号： G06F17/30613 , G06F17/30911
摘要： PROBLEM TO BE SOLVED: To prevent the increase of a retrieval time even when data on which any index is not reflected is increased in a text buffer for registration of a database.
SOLUTION: A database system registers data on which an index is not reflected in a text buffer 39 for registration. Then, when retrieving the text buffer 39 for registration, the database system creates an index 40 for registration buffer by using retrieval characters shown in the retrieval request. Afterwards, when accepting the retrieval request, the database system retrieves an index 63 of the database, and when there is not any pertinent data in the index 63, the database system retrieves the index 40 for a registration buffer, and retrieves the text buffer 39 for registration by using the index shown in the index 40 for a registration buffer. The database system reflects the index 40 for the registration buffer on the index 63 in a predetermined timing.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了防止在用于注册数据库的文本缓冲器中增加没有反映任何索引的数据的检索时间的增加。解决方案：数据库系统注册索引没有反映在文本缓冲器39中用于注册的数据。然后，当检索用于注册的文本缓冲器39时，数据库系统通过使用检索请求中显示的检索字符来创建用于注册缓冲器的索引40。之后，当接受检索请求时，数据库系统检索数据库的索引63，当索引63中没有任何相关数据时，数据库系统检索注册缓冲区的索引40，并检索文本缓冲区39 用于通过使用索引40中所示的索引用于注册缓冲器来进行注册。数据库系统在预定定时反映索引63上的注册缓冲器的索引40。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2006302307A Storage device management method 审中-公开
标题翻译：存储设备管理方法
公开(公告)号：JP2006302307A
公开(公告)日：2006-11-02
申请号：JP2006159237
申请日：2006-06-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TSUCHIDA MASASHI , MASAI KAZUO , TORII SHUNICHI
IPC分类号： G06F12/00
摘要： PROBLEM TO BE SOLVED: To reduce imbalance of loads by operating assignment of a storage area for performing division storage of a database. SOLUTION: A plurality of set key ranges are associated with a plurality of data storage areas provided to a storage device, when data is stored in the database, the data is stored in a data storage area corresponding to a key range including the data, when an assignment request of the data storage area and the key range is accepted, the data storage area is associated with the key range. Since the data storage area is associated with a key range to which many pieces or small pieces of data are assigned, the imbalance of the loads to each data storage area is reduced. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：通过操作分配用于执行数据库的分割存储的存储区域来减少负载的不平衡。解决方案：当数据存储在数据库中时，多个设置的关键字范围与提供给存储装置的多个数据存储区域相关联，数据被存储在对应于包括数据，当数据存储区域的分配请求和密钥范围被接受时，数据存储区域与密钥范围相关联。由于数据存储区域与分配有多个或多个数据片段的关键范围相关联，所以减少了对每个数据存储区域的负载的不平衡。版权所有（C）2007，JPO＆INPIT

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