MarkLogic 12 EA 2 Product Documentationtemporal functions (Temporal)
This module contains the functions used to insert, delete and manage temporal documents.
To understand the temporal functions, you need to understand the meaning of the following terms:
- Instant: an instant of time, such as "now", "12/31/2012, 01:00:00 am".
- Period: an anchored duration of time (e.g. December 01, 1999 through December 31, 2000, the fall semester)
- Axis: a named pair of range indexes that is the container for periods.
- Valid time: when a fact was true in modeled reality.
- System time: when a fact was stored in the database.
- User-defined time: a time value that user provides in replacement of system start time.
- LSQT (Last Stable Query Time): a document with a system start time before this point can be queried and a document with a system start time after this point can be updated and ingested.
The Tiered Storage function module is installed as the following file:
install_dir/Modules/MarkLogic/temporal.xqy
where install_dir is the directory in which
MarkLogic Server is installed.
To use the temporal.xqy module in your own XQuery modules,
include the following line in your XQuery prolog:
import module namespace temporal="http://marklogic.com/xdmp/temporal"
at "/MarkLogic/temporal.xqy";
32 functions
| Function name | Description |
|---|---|
| temporal.advanceLsqt | This function enables Last Stable Query Time (LSQT) on the named collection and advances the LSQT for the collection to the maximum system start time. |
| temporal.axes | This function returns all the axis names defined in the schema databases. |
| temporal.axisCreate | This function constructs an axis definition based on the existing range indexes that can be added to a temporal collection in subsequent API calls. |
| temporal.axisGetEnd | This function returns the range index used to define the end of the period by the named axis. |
| temporal.axisGetStart | This function returns the range index used to define the start of the period by the named axis. |
| temporal.axisRemove | This function removes an axis definition from the schema database. |
| temporal.collectionCreate | This function constructs a named and protected temporal collection in the schema database with the specified system and optional valid axes. |
| temporal.collectionGetAxis | This function returns the name of either the system or valid axis in the named temporal collection. |
| temporal.collectionGetOptions | This function returns the options set on the temporal collection. |
| temporal.collectionRemove | This function removes the named temporal collection from the Schemas database. |
| temporal.collections | This function returns all of the temporal collection names in the schema database. |
| temporal.collectionSetOptions | This function sets the options on the temporal collection. |
| temporal.documentDelete | This function deletes the temporal document identified by the given URI. |
| temporal.documentInsert | This function inserts a document into the database and stores it as a temporal document. |
| temporal.documentLoad | This function inserts a document into the database and stores it as a temporal document. |
| temporal.documentProtect | Protects a temporal document from certain temporal operations, such as update, delete or wipe for a specific period of time. |
| temporal.documentWipe | Deletes all versions of a temporal document. |
| temporal.getLsqt | This function returns the Last Stable Query Time (LSQT) for the collection at current moment. |
| temporal.getLsqtAutomation | This function returns whether Last Stable Query Time (LSQT) management is automatically managed (true) or not automatically managed (false). |
| temporal.getLsqtAutomationLag | When the LSQT is advanced automatically, this function returns how far behind (in milliseconds) the Last Stable Query Time (LSQT) is from latest system time. |
| temporal.getLsqtAutomationPeriod | This function returns how often Last Stable Query Time (LSQT) is automatically advanced, in milliseconds. |
| temporal.getUseLsqt | This function specifies whether the named temporal collection has LSQT (Last Stable Query Time) enabled (true) or disabled (false). |
| temporal.nodeDelete | Deletes a node from the database. |
| temporal.nodeInsertAfter | Adds an immediately following sibling to a node in a temporal document. |
| temporal.nodeInsertBefore | Adds an immediately preceding sibling to a node in a temporal document. |
| temporal.nodeInsertChild | Adds a new last child to a node in a temporal document. |
| temporal.nodeReplace | Replaces a node in a temporal document. |
| temporal.setLsqtAutomation | This function sets whether Last Stable Query Time (LSQT) management is automatic. |
| temporal.setUseLsqt | This function enables or disables the use of LSQT (Last Stable Query Time) on the named collection. |
| temporal.statementGetSystemTime | This function gets the system start time on temporal documents that are inserted or deleted in the same statement as this function. |
| temporal.statementSetDocumentVersionUri | This function sets document URI for a temporal document to be used for the new version of temporal document to be generated in the current statement. |
| temporal.statementSetSystemTime | This function sets the system start time on temporal documents that are inserted or deleted in the same statement as this function. |