I am bit new to elastic search. I am trying a nested query to get the result soem thing like below sql in query DSL..means I wanna restrict the search to driver last name as well as the vehicle make as well..like below use case.
select driver.last_name,driver.vehicle.make,driver.vehicle.model from drivers where driver.last_name='Hudson' and driver.vehicle.make"="Miller-Mete;
But this doesn't work in elastic search sql as well as Query DSL... --> can we do the query like this in ES...like let me clarify..
if department has List[employees] in Elasticsearch denoarmalized data.. and i want to restrict the query to department_name and emp_position..
--> is this use case even possible in elastic search?
select department_name,emp_name,emp_salary,emp_position where emp_position="Intern" and department.name="devlopment"
--> Below are mappings and search Query DSL...
PUT /drivers
{
"mappings": {
"properties": {
"driver": {
"type": "nested",
"properties": {
"last_name": {
"type": "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"vehicle": {
"type": "nested",
"properties": {
"make": {
"type": "text"
},
"model": {
"type": "text"
}
}
}
}
}
}
}
}
GET /drivers/_mapping
O/P:
{
"drivers" : {
"mappings" : {
"properties" : {
"driver" : {
"type" : "nested",
"properties" : {
"last_name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"vehicle" : {
"type" : "nested",
"properties" : {
"make" : {
"type" : "text"
},
"model" : {
"type" : "text"
}
}
}
}
}
}
}
}
}
--> inserting documents..
PUT /drivers/_doc/1
{
"driver" : {
"last_name" : "McQueen",
"vehicle" : [
{
"make" : "Powell Motors",
"model" : "Canyonero"
},
{
"make" : "Miller-Meteor",
"model" : "Ecto-1"
}
]
}
PUT /drivers/_doc/2
{
"driver" : {
"last_name" : "Hudson",
"vehicle" : [
{
"make" : "Mifune",
"model" : "Mach Five"
},
{
"make" : "Miller-Meteor",
"model" : "Ecto-1"
}
]
}
}
--> Below is the search query dsl..this gives 0 results. Even i replace
"term": {
"driver.last_name.keyword": "McQueen"
}
with "match" or "filter" still gives 0 results...
GET /drivers/_search
{
"query": {
"nested": {
"path": "driver",
"query": {
"nested": {
"path": "driver.vehicle",
"query": {
"bool": {
"must": [
{ "match": { "driver.vehicle.make": "Powell Motors" } },
{ "match": { "driver.vehicle.model": "Canyonero" } },
{
"term": {
"driver.last_name.keyword": "McQueen"
}
}
]
}
}
}
}
}
}
}
==> below Query DSL gives 2 results...
GET /drivers/_search
{
"query": {
"nested": {
"path": "driver",
"query": {
"nested": {
"path": "driver.vehicle",
"query": {
"bool": {
"must": [
{ "match": { "driver.vehicle.make": "Miller-Meteor" } }
]
}
}
}
}
}
}
}
O/P:
{
"took" : 1,
"timed_out" : false,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : {
"value" : 2,
"relation" : "eq"
},
"max_score" : 1.3097506,
"hits" : [
{
"_index" : "drivers",
"_type" : "_doc",
"_id" : "1",
"_score" : 1.3097506,
"_source" : {
"driver" : {
"last_name" : "McQueen",
"vehicle" : [
{
"make" : "Powell Motors",
"model" : "Canyonero"
},
{
"make" : "Miller-Meteor",
"model" : "Ecto-1"
}
]
}
}
},
{
"_index" : "drivers",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.3097506,
"_source" : {
"driver" : {
"last_name" : "Hudson",
"vehicle" : [
{
"make" : "Mifune",
"model" : "Mach Five"
},
{
"make" : "Miller-Meteor",
"model" : "Ecto-1"
}
]
}
}
}
]
}
}
==> this gives "parsing_exception",
"reason" : "[bool] malformed query, expected [END_OBJECT] but found [FIELD_NAME]",
==> even replacing 1st query bool to "match" also gives this error...as below
GET /drivers/_search
{
"query": {
"nested": {
"path": "driver",
"query": {
"bool": {
"must": [
{"match": {
"driver.last_name.keyword": "Hudson"
}}
]
},
"nested": {
"path": "driver.vehicle",
"query": {
"bool": {
"must": [
{
"match": {
"driver.vehicle.make": "Miller-Meteor"
}
}
]
}
}
}
}
}
}