# SearchQL [](https://circleci.com/gh/usecanvas/searchql)
SearchQL is a search query parser written in Elixir. Given a query such as:
```
foo AND bar OR "qux AND quux" OR corge AND NOT grault AND garply
```
SearchQL can generate a data representation of the query:
```elixir
[or: {
[or: {
[and: {[data: "foo"], [data: "bar"]}],
[quote: "qux AND quux"]}],
[and: {
[and: {[data: "corge"], [not: {[data: "grault"]}]}],
[data: "garply"]}]}]
```
Notice that in the query parsing, `AND` binds tighter than `OR`, and both
operators are left-associative. This seems to give the best interpretation of
what a human would mean when typing such a query.
A programmer can use SearchQL to determine whether a search query matches a
piece of data by providing a module such as
[SearchQL.StringQuerier][string_querier] that implements the
[SearchQL.Querier behaviour][querier_behaviour]:
```elixir
SearchQL.matches?(
~s(foo and bar or baz),
~s(baz),
SearchQL.StringQuerier) # true
```
For more info, see the [SearchQL documentation][searchql_documentation].
## Installation
1. Add `searchql` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[{:searchql, "~> 1.0.0"}]
end
```
2. Ensure `searchql` is started before your application:
```elixir
def application do
[applications: [:searchql]]
end
```
[querier_behaviour]: https://github.com/usecanvas/searchql/blob/master/lib/searchql/querier.ex
[searchql_documentation]: https://hexdocs.pm/searchql/readme.html
[string_querier]: https://github.com/usecanvas/searchql/blob/master/test/support/string_querier.ex
