Match all partial words in one field - elasticsearch

Question

I have this query:
{
"query": {
"match": {
"tag": {
"query": "john smith",
"operator": "and"
}
}
}
}
With the and operator I solved to return documents, where words "john" and "smith" must be present in the tag field in any position and any order. But I need to return documents where all partial words must be present in the tag field, like "joh" and "smit". I try this:
{
"query": {
"match": {
"tag": {
"query": "*joh* *smit*",
"operator": "and"
}
}
}
}
but nothing returns. How can I solve this?

Answer 1

You can use the edge_ngram tokenizer and boolean query with multiple must clause(using your example 2) to get the desired output.
Working example:
Index Def
{
"settings": {
"analysis": {
"filter": {
"autocomplete_filter": {
"type": "edge_ngram", --> note this
"min_gram": 1,
"max_gram": 10
}
},
"analyzer": {
"autocomplete": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"autocomplete_filter"
]
}
}
}
},
"mappings": {
"properties": {
"title": {
"type": "text",
"analyzer": "autocomplete",
"search_analyzer": "standard"
}
}
}
}
Index two sample doc, one which should match and one which shouldn't
{
"title" : "john bravo" --> show;dn't match
}
{
"title" : "john smith" --> should match
}
Boolean Search query with must clause
{
"query": {
"bool": {
"must": [ --> this means both `jon` and `smit` match clause must match, replacement of your `and` operator.
{
"match": {
"title": "joh"
}
},
{
"match": {
"title": "smit"
}
}
]
}
}
}
Search result
"hits": [
{
"_index": "so_partial",
"_type": "_doc",
"_id": "1",
"_score": 1.2840209,
"_source": {
"title": "john smith"
}
}
]