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admin:features:attach:tables [2012/02/29 22:57] doc |
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| - | ~~NOTOC~~ | ||
| - | {{page>:top_add&nofooter&noeditbtn}} | ||
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| - | ====== Administration: Omnidex Features ====== | ||
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| - | ===== Attaching Data ===== | ||
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| - | [[admin:features:attach:home|Overview]] | | ||
| - | **[[admin:features:attach:tables|Attaching Tables]]** | | ||
| - | [[admin:features:attach:databases|Attaching Databases]] | | ||
| - | [[admin:features:attach:queries|Query Optimization]] | ||
| - | |||
| - | ---- | ||
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| - | ==== Attaching Tables ==== | ||
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| - | Omnidex applications begin by connecting to an Omnidex Environment, providing access to all of the databases and tables declared in the environment. This can be temporarily expanded by attaching additional tables to the current connection. Attaching a table allows it to be accessed in statements along with the other tables in the environment. | ||
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| - | Raw data files can be attached to any connection to an Omnidex Environment. If the database in the environment is already a FILE type, meaning that it references raw data files, then the attached table can be placed directly into that database. If the database in the environment is a relational type, then the raw data files can be attached in the temp database, $TEMPDB, which is always present for all connections. | ||
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| - | Relational tables can be attached to a connection as long as it matches the database type declared in the Omnidex environment. For example, if an Omnidex Environment references a Microsoft SQL Server database, then additional SQL Server tables can be attached; however, Oracle tables cannot since they are not the same database type. If multiple database types are required, then each database can be declared in a separate Omnidex environment and [[admin:features:attach:databases|attached]] as needed. Alternatively, a single Omnidex environment can permanently declare multiple database, each of a different type. | ||
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| - | The following restrictions apply to attached tables: | ||
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| - | * Attached tables cannot have Omnidex indexing declared. | ||
| - | * Attached tables cannot be partitioned as part of an Omnidex Grid. | ||
| - | * Attached tables can only be attached into the current connection. | ||
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| - | Attaching a table is simple, and uses syntax that is nearly identical to CREATE TABLE, as shown below: | ||
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| - | <code> | ||
| - | -> connect to simple | ||
| - | Connected to D:\class\labs\attach\simple.xml | ||
| - | -> | ||
| - | -> attach table "AREACODES" | ||
| - | >> physical "dat/arc.dat" | ||
| - | >> ( | ||
| - | >> "AREACODE" character(3), | ||
| - | >> "TYPE" string(7), | ||
| - | >> "TYPE_DESC" string(31), | ||
| - | >> "ASSIGNABLE" character(1), | ||
| - | >> "EXPLANATION" string(31), | ||
| - | >> "RESERVED" character(1), | ||
| - | >> "ASSIGNED" character(1), | ||
| - | >> "ASSIGN_DATE" ascii date, | ||
| - | >> "GEOGRAPHIC" character(1), | ||
| - | >> "SERVICE" string(39), | ||
| - | >> "STATES" character(10), | ||
| - | >> "LOCATION" string(31), | ||
| - | >> "COUNTRY" character(2), | ||
| - | >> "AREA_SERVED" string(511), | ||
| - | >> "IN_SERVICE" character(1), | ||
| - | >> "IN_SERVICE_DATE" ascii date, | ||
| - | >> "OVERLAY" character(1), | ||
| - | >> "OVERLAY_COMPLEX" character(20), | ||
| - | >> "PARENT" character(32), | ||
| - | >> "TIME_ZONE1" character(1), | ||
| - | >> "TIME_ZONE2" character(1), | ||
| - | >> constraint AREACODES_AREACODE_PK primary ("AREACODE") | ||
| - | >> ); | ||
| - | Table AREACODES attached | ||
| - | -> ; | ||
| - | -> show tables | ||
| - | |||
| - | Tables | ||
| - | ------ | ||
| - | |||
| - | Environment | ||
| - | Database | ||
| - | Table Length Cols Rows Type | ||
| - | ---------------------------------------------------------------------------- | ||
| - | USER_ENVIRONMENT | ||
| - | SIMPLE | ||
| - | COUNTRIES 98 7 239 FIXED | ||
| - | STATES 44 6 76 FIXED | ||
| - | GENDERS 33 2 2 FIXED | ||
| - | HOUSEHOLDS 99 6 1,909 FIXED | ||
| - | INDIVIDUALS 159 7 5,000 FIXED | ||
| - | $TEMPDB | ||
| - | *AREACODES 747 21 800 FIXED | ||
| - | </code> | ||
| - | |||
| - | ==== ==== | ||
| - | **[[admin:features:attach:home|Prev]]** | | ||
| - | **[[admin:features:attach:databases|Next]]** | ||
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| - | ====== Additional Resources ====== | ||
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| - | See also: | ||
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| - | {{page>:admin:features:see_also&nofooter&noeditbtn}} | ||
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| - | {{page>:bottom_add&nofooter&noeditbtn}} | ||