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Statements

Subject Item
dbr:Data_Access_Language
dbo:wikiPageWikiLink
dbr:Butler_SQL
Subject Item
dbr:Butler_SQL
rdf:type
yago:Writing106359877 yago:Communication100033020 yago:CodingSystem106353757 dbo:Software yago:WrittenCommunication106349220 yago:Software106566077 yago:Abstraction100002137 yago:DatabaseManagementSystem106588785 yago:WikicatProprietaryDatabaseManagementSystems yago:Code106355894
rdfs:label
Butler SQL
rdfs:comment
Butler SQL is a now-defunct SQL-based database server for the "classic" Mac OS from EveryWare Development. For much of its history, it was partnered with another EveryWare product, Tango, that built dynamic database pages from SQL data. The product eventually ended up with Pervasive Software, although it is no longer sold. Butler suffered from performance problems due to the single-user nature of the Mac OS. In particular, file access was single-threaded and multitasking was coordinated by the applications, not the operating system.
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dbc:Proprietary_database_management_systems dbc:Classic_Mac_OS_software dbc:Discontinued_software dbc:MacOS_database-related_software
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847637672
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dbo:abstract
Butler SQL is a now-defunct SQL-based database server for the "classic" Mac OS from EveryWare Development. For much of its history, it was partnered with another EveryWare product, Tango, that built dynamic database pages from SQL data. The product eventually ended up with Pervasive Software, although it is no longer sold. Butler was introduced to take advantage of new a Mac OS component known as the Data Access Manager (DAM), which was similar in concept to ODBC, allowing end-user client programs to access various data sources. DAM, however, worked at a lower level than ODBC and did not contain any inherent query language. To address the concern that a single DAM program might want to work with different back-end databases, Apple used a second system known as the Data Access Language (DAL), which was a variant of SQL that included additional flow-control and data manipulation instructions. DAL queries were converted to the target database using an adaptor on the server. Butler was written to natively support DAL as its variant of SQL, and use DAM internally to support networking. As such, it avoided several intermediary layers that would be required to use the same queries on other database servers. Butler 2.0, released in May 1996, added direct ODBC links as well. Butler suffered from performance problems due to the single-user nature of the Mac OS. In particular, file access was single-threaded and multitasking was coordinated by the applications, not the operating system.
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dbr:Server
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