Some questions about queries

[PabloCastellano]

Hello. I'm testing blast to check if it could replace elasticsearch for my use case.

However I find the examples very brief and don't understand the following query example.

blast/examples/example_search_request.json

Lines 1 to 14 in bfa8106

	{
	"search_request": {
	"query": {
	"query": "+_all:search"
	},
	"size": 10,
	"from": 0,
	"fields": [
	"*"
	],
	"sort": [
	"-_score",
	"_id",
	"-timestamp"

After reading this example, I have the following questions.

• What does _all means in the query field?
• What does the plus sign before _all means?
• How can I search inside a particular field?
• What happens if I index a type that is not defined in the mapping?
• How can I search and filter by the _type field?

Can you give me some pointers? I'll be happy to contribute by documenting these answers.

[fahmifan]

AFAIK, you could check blevesearch docs https://blevesearch.com/docs/Query-String-Query/,
from your example, +_all:search it will match string search to all fields in the mapping.