Difference between revisions of "SET SKIP"
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==Purpose== | ==Purpose== | ||
Automatically establishes one-to-many relationships across related tables | Automatically establishes one-to-many relationships across related tables | ||
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==Syntax== | ==Syntax== | ||
| − | SET SKIP TO [<alias>, | + | SET SKIP TO [<alias>, ...] |
SET SKIP ON | OFF | (<expL>) | SET SKIP ON | OFF | (<expL>) | ||
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==See Also== | ==See Also== | ||
| − | [[SET FILTER]], [[SET RELATION]] | + | [[ALIAS()]], [[CREATE VIEW]], [[DBRSELECT()]], [[DISPLAY]], [[INDEX]], [[LIST]], [[REPORT]], [[SELECT]], [[SET FILTER]], [[SET RELATION]], [[SET VIEW]], [[SKIP]], [[TARGET()]], [[USE]] |
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The SET SKIP TO <alias> command allows for master to detail relationships between tables. It allows you to access all detail records in a related table. This command is only effective when SET RELATION is ON, and when a relationship exists between data files. The SET SKIP TO <alias> command operates by starting at the innermost relationship and scanning for all duplicate relationship keys to satisfy all detail records for the relationship. It then skips up a level in the relationship chain and performs the same operation on that data file. The record pointer in all specified related data files will update before the record pointer in the active data file is changed. Then it skips up to the master data file, reading the next record and setting up related data files. | The SET SKIP TO <alias> command allows for master to detail relationships between tables. It allows you to access all detail records in a related table. This command is only effective when SET RELATION is ON, and when a relationship exists between data files. The SET SKIP TO <alias> command operates by starting at the innermost relationship and scanning for all duplicate relationship keys to satisfy all detail records for the relationship. It then skips up a level in the relationship chain and performs the same operation on that data file. The record pointer in all specified related data files will update before the record pointer in the active data file is changed. Then it skips up to the master data file, reading the next record and setting up related data files. | ||
| − | Master to detail relationships that have been set up with the SET SKIP TO <alias> command only affect the DISPLAY, LIST and REPORT commands | + | Master to detail relationships that have been set up with the SET SKIP TO <alias> command only affect the DISPLAY, LIST and REPORT commands. The SET SKIP TO command disables relationships previously set with the SET SKIP <alias> command. The SET SKIP ON/OFF commands enable or disable the satisfying of the master detail relationship defined with the SET SKIP TO <alias> command on a system wide basis. |
==Example== | ==Example== | ||
| − | <code> | + | <code lang="recital"> |
select c | select c | ||
use invoices index cust_code | use invoices index cust_code | ||
| Line 37: | Line 30: | ||
set skip on | set skip on | ||
set relation to cust_code into invoices | set relation to cust_code into invoices | ||
| − | set skip to | + | set skip to orders, invoices |
| + | </code> | ||
==Products== | ==Products== | ||
| − | Recital | + | Recital Server, Recital |
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Commands]] | [[Category:Commands]] | ||
[[Category:Set_Commands|SKIP]] | [[Category:Set_Commands|SKIP]] | ||
| + | [[Category:Table Basics]] | ||
| + | [[Category:Table Basics SET Commands]] | ||
Latest revision as of 09:57, 16 August 2010
Purpose
Automatically establishes one-to-many relationships across related tables
Syntax
SET SKIP TO [<alias>, ...]
SET SKIP ON | OFF | (<expL>)
See Also
ALIAS(), CREATE VIEW, DBRSELECT(), DISPLAY, INDEX, LIST, REPORT, SELECT, SET FILTER, SET RELATION, SET VIEW, SKIP, TARGET(), USE
Description
The SET SKIP TO <alias> command allows for master to detail relationships between tables. It allows you to access all detail records in a related table. This command is only effective when SET RELATION is ON, and when a relationship exists between data files. The SET SKIP TO <alias> command operates by starting at the innermost relationship and scanning for all duplicate relationship keys to satisfy all detail records for the relationship. It then skips up a level in the relationship chain and performs the same operation on that data file. The record pointer in all specified related data files will update before the record pointer in the active data file is changed. Then it skips up to the master data file, reading the next record and setting up related data files.
Master to detail relationships that have been set up with the SET SKIP TO <alias> command only affect the DISPLAY, LIST and REPORT commands. The SET SKIP TO command disables relationships previously set with the SET SKIP <alias> command. The SET SKIP ON/OFF commands enable or disable the satisfying of the master detail relationship defined with the SET SKIP TO <alias> command on a system wide basis.
Example
select c use invoices index cust_code select b use orders set relation to cust_code into invoices select a use customers set skip on set relation to cust_code into invoices set skip to orders, invoices
Products
Recital Server, Recital
