IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Columnar results
editColumnar results
editThe most well known way of displaying the results of an SQL query result in general is the one where each individual record/document represents one line/row. For certain formats, Elasticsearch SQL can return the results in a columnar fashion: one row represents all the values of a certain column from the current page of results.
The following formats can be returned in columnar orientation: json, yaml, cbor and smile.
response = client.sql.query(
format: 'json',
body: {
query: 'SELECT * FROM library ORDER BY page_count DESC',
fetch_size: 5,
columnar: true
}
)
puts response
POST /_sql?format=json
{
"query": "SELECT * FROM library ORDER BY page_count DESC",
"fetch_size": 5,
"columnar": true
}
Which returns:
{
"columns": [
{"name": "author", "type": "text"},
{"name": "name", "type": "text"},
{"name": "page_count", "type": "short"},
{"name": "release_date", "type": "datetime"}
],
"values": [
["Peter F. Hamilton", "Vernor Vinge", "Frank Herbert", "Alastair Reynolds", "James S.A. Corey"],
["Pandora's Star", "A Fire Upon the Deep", "Dune", "Revelation Space", "Leviathan Wakes"],
[768, 613, 604, 585, 561],
["2004-03-02T00:00:00.000Z", "1992-06-01T00:00:00.000Z", "1965-06-01T00:00:00.000Z", "2000-03-15T00:00:00.000Z", "2011-06-02T00:00:00.000Z"]
],
"cursor": "sDXF1ZXJ5QW5kRmV0Y2gBAAAAAAAAAAEWWWdrRlVfSS1TbDYtcW9lc1FJNmlYdw==:BAFmBmF1dGhvcgFmBG5hbWUBZgpwYWdlX2NvdW50AWYMcmVsZWFzZV9kYXRl+v///w8="
}
Any subsequent calls using a cursor still have to contain the columnar parameter to preserve the orientation,
meaning the initial query will not remember the columnar option.
POST /_sql?format=json
{
"cursor": "sDXF1ZXJ5QW5kRmV0Y2gBAAAAAAAAAAEWWWdrRlVfSS1TbDYtcW9lc1FJNmlYdw==:BAFmBmF1dGhvcgFmBG5hbWUBZgpwYWdlX2NvdW50AWYMcmVsZWFzZV9kYXRl+v///w8=",
"columnar": true
}
Which looks like:
{
"values": [
["Dan Simmons", "Iain M. Banks", "Neal Stephenson", "Frank Herbert", "Frank Herbert"],
["Hyperion", "Consider Phlebas", "Snow Crash", "God Emperor of Dune", "Children of Dune"],
[482, 471, 470, 454, 408],
["1989-05-26T00:00:00.000Z", "1987-04-23T00:00:00.000Z", "1992-06-01T00:00:00.000Z", "1981-05-28T00:00:00.000Z", "1976-04-21T00:00:00.000Z"]
],
"cursor": "46ToAwFzQERYRjFaWEo1UVc1a1JtVjBZMmdCQUFBQUFBQUFBQUVXWjBaNlFXbzNOV0pVY21Wa1NUZDJhV2t3V2xwblp3PT3/////DwQBZgZhdXRob3IBBHRleHQAAAFmBG5hbWUBBHRleHQAAAFmCnBhZ2VfY291bnQBBGxvbmcBAAFmDHJlbGVhc2VfZGF0ZQEIZGF0ZXRpbWUBAAEP"
}