Table of Contents

Time Boundary Queries

Time boundary queries return the earliest and latest data points of a data set. The grammar is:

{
    "queryType" : "timeBoundary",
    "dataSource": "sample_datasource",
    "bound"     : < "maxTime" | "minTime" > # optional, defaults to returning both timestamps if not set 
    "filter"    : { "type": "and", "fields": [<filter>, <filter>, ...] } # optional
}

There are 3 main parts to a time boundary query:

property description required?
queryType This String should always be "timeBoundary"; this is the first thing Druid looks at to figure out how to interpret the query yes
dataSource A String or Object defining the data source to query, very similar to a table in a relational database. See DataSource for more information. yes
bound Optional, set to maxTime or minTime to return only the latest or earliest timestamp. Default to returning both if not set no
filter See Filters no
context See Context no

The format of the result is:

[ {
  "timestamp" : "2013-05-09T18:24:00.000Z",
  "result" : {
    "minTime" : "2013-05-09T18:24:00.000Z",
    "maxTime" : "2013-05-09T18:37:00.000Z"
  }
} ]