Stop-words not removed during simple-query query-time analysis #28855
Description
ES 6.2.1
I've noticed that the simple-query-string query type (https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-simple-query-string-query.html) doesn't seem to handle stopwords at all at analysis time, best exemplified with "default_operator: AND".
Consider the below - We create an index and change the default analyzer to use English stopwords:
PUT /simp_idx
{
"mappings": {
"my_type": {
"properties": {
"field_1": {
"type": "text"
}
}
}
},
"settings": {
"number_of_shards": 1,
"number_of_replicas": 0,
"analysis": {
"filter": {
"english_stop": {
"type": "stop",
"stopwords": "_english_"
}
},
"analyzer": {
"default": {
"tokenizer": "standard",
"filter": [
"english_stop"
]
}
}
}
}
}
And then populate it:
PUT /simp_idx/my_type/1
{
"field_1": "place of beauty"
}
PUT /simp_idx/my_type/2
{
"field_1": "place and beauty"
}
Now, if we query this with the regular query_string, we get the expected two results:
GET /simp_idx/my_type/_search
{
"query": {
"query_string" : {
"query": "place of",
"default_operator": "and"
}
}
}
But the same query using simple-query-string and the AND operator finds no results:
GET /simp_idx/my_type/_search
{
"query": {
"simple_query_string" : {
"query": "place of",
"fields": [ "field_1"],
"default_operator": "and"
}
}
}
Remove the "of" from the query and it will work as expected.
Maybe this is intentional because the SQS is "simple", but it's not documented on the SQS page - the only explicitly stated difference is no exception raising. Seems like a bug though, hence the report.