Difference between revisions of "Database Events"
Yvonne.milne (Talk | contribs) |
Yvonne.milne (Talk | contribs) |
||
| Line 3: | Line 3: | ||
==See Also== | ==See Also== | ||
| − | [[ADATABASES()]], [[ALTER TABLE]], [[ADD TABLE]], [[ALTER INDEX]], [[CLOSE DATABASES]], [[CLOSE TABLES]], [[COMPILE DATABASE]], [[CREATE DATABASE]], [[CREATE TABLE]], [[CREATE INDEX]], [[CREATE VIEW]], [[DATABASE()]], [[DBUSED()]], [[DISPLAY DATABASE]], [[DISPLAY INDEXES]], [[DISPLAY TABLES]], [[DROP DATABASE]], [[DROP INDEX]], [[DROP TABLE]], [[GETENV()]], [[LIST DATABASE]], [[LIST INDEXES]], [[LIST TABLES]], [[OPEN DATABASE]], [[PACK DATABASE]], [[REBUILD DATABASE]], [[REINDEX DATABASE]], [[SET AUTOCATALOG]], [[SET DBCEVENTS]], [[SET EXCLUSIVE]], [[SQL USE|USE]] | + | [[ADATABASES()]], [[ALTER TABLE]], [[ADD TABLE]], [[ALTER INDEX]], [[CLOSE DATABASES]], [[CLOSE TABLES]], [[COMPILE DATABASE]], [[CREATE DATABASE]], [[CREATE TABLE]], [[CREATE INDEX]], [[CREATE VIEW]], [[DATABASE()]], [[DBUSED()]], [[DISPLAY DATABASE]], [[DISPLAY INDEXES]], [[DISPLAY TABLES]], [[DROP DATABASE]], [[DROP INDEX]], [[DROP TABLE]], [[Event Delegate Sequences]], [[GETENV()]], [[LIST DATABASE]], [[LIST INDEXES]], [[LIST TABLES]], [[OPEN DATABASE]], [[PACK DATABASE]], [[REBUILD DATABASE]], [[REINDEX DATABASE]], [[SET AUTOCATALOG]], [[SET DBCEVENTS]], [[SET EXCLUSIVE]], [[SQL Constraints]], [[SQL USE|USE]] |
==Description== | ==Description== | ||
| Line 23: | Line 23: | ||
|[[DBC_BEFOREUPDATE]]||Occurs before an update operation | |[[DBC_BEFOREUPDATE]]||Occurs before an update operation | ||
|- | |- | ||
| − | |[[DBC_CLOSEDATA]]||Occurs when | + | |[[DBC_CLOSEDATA]]||Occurs when a database is closed |
|- | |- | ||
|[[DBC_OPENDATA]]||Occurs when a database is opened | |[[DBC_OPENDATA]]||Occurs when a database is opened | ||
Revision as of 10:01, 2 February 2018
Purpose
Database events are triggered by certain database operations
See Also
ADATABASES(), ALTER TABLE, ADD TABLE, ALTER INDEX, CLOSE DATABASES, CLOSE TABLES, COMPILE DATABASE, CREATE DATABASE, CREATE TABLE, CREATE INDEX, CREATE VIEW, DATABASE(), DBUSED(), DISPLAY DATABASE, DISPLAY INDEXES, DISPLAY TABLES, DROP DATABASE, DROP INDEX, DROP TABLE, Event Delegate Sequences, GETENV(), LIST DATABASE, LIST INDEXES, LIST TABLES, OPEN DATABASE, PACK DATABASE, REBUILD DATABASE, REINDEX DATABASE, SET AUTOCATALOG, SET DBCEVENTS, SET EXCLUSIVE, SQL Constraints, USE
Description
Database events are triggered by certain database operations. They can have code associated with them that is run automatically when the event occurs.
| Event | Description |
|---|---|
| DBC_AFTERDELETE | Occurs after a delete operation |
| DBC_AFTERINSERT | Occurs after an insert operation |
| DBC_AFTERUPDATE | Occurs after an update operation |
| DBC_BEFOREDELETE | Occurs before a delete operation |
| DBC_BEFOREINSERT | Occurs before an insert operation |
| DBC_BEFOREUPDATE | Occurs before an update operation |
| DBC_CLOSEDATA | Occurs when a database is closed |
| DBC_OPENDATA | Occurs when a database is opened |
When a database is opened, if dbc_library.prg (.dbo compiled/runtime) procedure library file exists, it is loaded as a system library.
Programs associated with database events should reside in the relevant database's directory.
These can be created and modified from the Events tab in the Data Workspace when a database is open.
