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history.get

Description

integer/array history.get(object parameters)

The method allows to retrieve history data according to the given parameters.

See also: known issues

This method may return historical data of a deleted entity if this data has not been removed by the housekeeper yet.

Parameters

(object) Parameters defining the desired output.

The method supports the following parameters.

Parameter Type Description
history integer History object types to return.

Possible values:
0 - numeric float;
1 - character;
2 - log;
3 - numeric unsigned;
4 - text.

Default: 3.
hostids string/array Return only history from the given hosts.
itemids string/array Return only history from the given items.
time_from timestamp Return only values that have been received after or at the given time.
time_till timestamp Return only values that have been received before or at the given time.
sortfield string/array Sort the result by the given properties.

Possible values are: itemid and clock.
countOutput flag These parameters being common for all get methods are described in detail in the reference commentary page.
editable boolean
excludeSearch flag
filter object
limit integer
output query
search object
searchByAny boolean
searchWildcardsEnabled boolean
sortorder string/array
startSearch flag

Return values

(integer/array) Returns either:

  • an array of objects;
  • the count of retrieved objects, if the countOutput parameter has been used.

Examples

Retrieving item history data

Return 10 latest values received from a numeric(float) item.

Request:

{
           "jsonrpc": "2.0",
           "method": "history.get",
           "params": {
               "output": "extend",
               "history": 0,
               "itemids": "23296",
               "sortfield": "clock",
               "sortorder": "DESC",
               "limit": 10
           },
           "auth": "038e1d7b1735c6a5436ee9eae095879e",
           "id": 1
       }

Response:

{
           "jsonrpc": "2.0",
           "result": [
               {
                   "itemid": "23296",
                   "clock": "1351090996",
                   "value": "0.0850",
                   "ns": "563157632"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090936",
                   "value": "0.1600",
                   "ns": "549216402"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090876",
                   "value": "0.1800",
                   "ns": "537418114"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090816",
                   "value": "0.2100",
                   "ns": "522659528"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090756",
                   "value": "0.2150",
                   "ns": "507809457"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090696",
                   "value": "0.2550",
                   "ns": "495509699"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090636",
                   "value": "0.3600",
                   "ns": "477708209"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090576",
                   "value": "0.3750",
                   "ns": "463251343"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090516",
                   "value": "0.3150",
                   "ns": "447947017"
               },
               {
                   "itemid": "23296",
                   "clock": "1351090456",
                   "value": "0.2750",
                   "ns": "435307141"
               }
           ],
           "id": 1
       }

Source

CHistory::get() in frontends/php/include/classes/api/services/CHistory.php.