How to search a term with a middle dash in azure search? - azure-cognitive-search

Question

I'm learning to use azure search and I dont find a way to search a term with a middle dash into the ItemId field, doesn't care if the term to search it's at the beginning or at the middle.
I have these fields with data in my index
+-----+--------------------+-------------+
| Cat | ItemId | Description |
+-----+--------------------+-------------+
| 100 | 400800-1100103U | desc item 1 |
| 100 | 400800-11001066 | desc item 2 |
| 100 | 400800-11001068 | desc item 3 |
| 101 | 400800-110010F6 | desc item 4 |
+-----+--------------------+-------------+
This is my index field configuration:
+-------------+-------------+-----------+-----------+-----------+------------+
| Field Name | Retrievable | Filerable | Sortable | Facetable | Searchable |
+-------------+-------------+-----------+-----------+-----------+------------+
| Cat | OK | OK | OK | OK | X |
| ItemId | OK | OK | OK | OK | OK |
| Description | OK | | | | |
+-------------+-------------+-----------+-----------+-----------+------------+
And this is my custom analyzer to the field ItemId to generate just one token even if has a middle dash.
{
"#odata.type": "#Microsoft.Azure.Search.CustomAnalyzer",
"name": "keyword_lowercase",
"tokenizer": "keyword_v2",
"tokenFilters": [
"lowercase"
],
"charFilters": []
}
If I search with this query: $select=RowKey&search=400800-1100*
I get these results:
400800-1100103U
400800-11001066
400800-11001068
400800-110010F6
But if I try to search with a middle term like this: $select=RowKey&search=RowKey:(00800-1100*)~
I get 0 results.
So how can I search a term with a middle dash into the ItemId, doesn't care if the term to search it's at the beginning or at the middle?

Answer 1

I remove the analyzer and change the GET by a POST using this code in the body of the request.
{
"queryType": "full",
"search": "/.*00-11.*/",
"searchFields": "ItemId",
"select": "ItemId",
"count": true,
"top": 10
}
Using the full query property with Lucene syntax analyzer and a regex, the search works as expected.
Note that if you try to use this regex in the query search explorer in azure, this doesn't return any result. I think that it's because the search explorer use a GET request.
thanks for the answer Corom - MSFT. It works. I just want to answer with more clarify

Answer 2

I believe that this post answers your question by using regular expression search but has some considerations. Alternatively you can consider using fuzzy search or use the Edge N-gram tokenizer with a reverse token filter depending on your specific scenario.