Difference between revisions of "ROLLBACK TIMELINE"
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==Purpose== | ==Purpose== | ||
Rolls back transactions stored in the database timeline | Rolls back transactions stored in the database timeline | ||
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==Syntax== | ==Syntax== | ||
ROLLBACK TIMELINE [RANGE <expC1> [, <expC2>]] [FOR <expL>] | ROLLBACK TIMELINE [RANGE <expC1> [, <expC2>]] [FOR <expL>] | ||
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==See Also== | ==See Also== | ||
| − | [[CLEAR TIMELINE]], [[DTOS()]], [[DISPLAY TIMELINE]], [[LIST TIMELINE]], [[SET TIMELINE]], [[SET TIMESTAMP]], [[SYSTIMELINE]], [[ | + | [[CLEAR TIMELINE]], [[DTOS()]], [[DISPLAY TIMELINE]], [[LIST TIMELINE]], [[SET TIMELINE]], [[SET TIMESTAMP]], [[SYSTIMELINE]], [[TIMELINE()]] |
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==Description== | ==Description== | ||
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The optional FOR <expL> clause, where <expL> is a valid logical expression, can also be used to restrict the rollback. For a structure listing of the database timeline storage table, please see [[SYSTIMELINE]]. | The optional FOR <expL> clause, where <expL> is a valid logical expression, can also be used to restrict the rollback. For a structure listing of the database timeline storage table, please see [[SYSTIMELINE]]. | ||
| − | To enable database timelines | + | To enable database timelines SET TIMELINE must be ON. SET TIMELINE is OFF by default. |
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==Example== | ==Example== | ||
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</code> | </code> | ||
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[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Commands]] | [[Category:Commands]] | ||
| − | [[Category: | + | [[Category:Databases]] |
Revision as of 06:14, 7 December 2012
Contents
Purpose
Rolls back transactions stored in the database timeline
Syntax
ROLLBACK TIMELINE [RANGE <expC1> [, <expC2>]] [FOR <expL>]
See Also
CLEAR TIMELINE, DTOS(), DISPLAY TIMELINE, LIST TIMELINE, SET TIMELINE, SET TIMESTAMP, SYSTIMELINE, TIMELINE()
Description
ROLLBACK TIMELINE rolls back transactions stored in the database timeline. Database timelines provide row versioning for Recital database applications. Whenever a change is made to a table that is timeline enabled, delta changes are automatically recorded for each transaction.
The optional RANGE <expC1> [, <expC2>] clause allows the rollback to be restricted to transactions from a particular date <expC1> or transactions that fall between two inclusive dates: <expC1> and <expC2>. The dates must be specified as strings in the format YYYYMMDDHH:MM:SS (including the time) or YYYYMMDD (date only). The DTOS() function can be used to convert date data type values to YYYYMMDD format. HH:MM:SS is the standard time format returned by the TIME() function.
The optional FOR <expL> clause, where <expL> is a valid logical expression, can also be used to restrict the rollback. For a structure listing of the database timeline storage table, please see SYSTIMELINE.
To enable database timelines SET TIMELINE must be ON. SET TIMELINE is OFF by default.
Example
rollback timeline range dtos(date()-10), dtos(date()) for table = "example"
