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Endpoint

Table of contents

Introduction

To send query request to SQL plugin, you can either use a request parameter in HTTP GET or request body by HTTP POST request. POST request is recommended because it doesn't have length limitation and allows for other parameters passed to plugin for other functionality such as prepared statement. And also the explain endpoint is used very often for query translation and troubleshooting.

GET

Description

You can send HTTP GET request with your query embedded in URL parameter.

Example

SQL query:

>> curl -H 'Content-Type: application/json' -X GET localhost:9200/_opendistro/_sql?sql=SELECT * FROM accounts

POST

Description

You can also send HTTP POST request with your query in request body.

Example

SQL query:

>> curl -H 'Content-Type: application/json' -X POST localhost:9200/_opendistro/_sql -d '{
  "query" : "SELECT * FROM accounts"
}'

Explain

Description

To translate your query, send it to explain endpoint. The explain output is Elasticsearch domain specific language (DSL) in JSON format. You can just copy and paste it to your console to run it against Elasticsearch directly.

Example

Explain query:

>> curl -H 'Content-Type: application/json' -X POST localhost:9200/_opendistro/_sql/_explain -d '{
  "query" : "SELECT firstname, lastname FROM accounts WHERE age > 20"
}'

Explain:

{
  "from" : 0,
  "size" : 200,
  "query" : {
    "bool" : {
      "filter" : [
        {
          "bool" : {
            "must" : [
              {
                "range" : {
                  "age" : {
                    "from" : 20,
                    "to" : null,
                    "include_lower" : false,
                    "include_upper" : true,
                    "boost" : 1.0
                  }
                }
              }
            ],
            "adjust_pure_negative" : true,
            "boost" : 1.0
          }
        }
      ],
      "adjust_pure_negative" : true,
      "boost" : 1.0
    }
  },
  "_source" : {
    "includes" : [
      "firstname",
      "lastname"
    ],
    "excludes" : [ ]
  }
}