GavinRay97 edited a comment on issue #1864:
URL:
https://github.com/apache/arrow-datafusion/issues/1864#issuecomment-1044650838
I came here to post an issue with the same question phrased slightly
differently
I was going to ask it as:
> "Is there a trait/interface to implement that allows executing a
`LogicalPlan`?"
The usecase is to embed DataFusion's query engine and optimizer/planner in
an application and then plug in an execution engine, like a database driver.
In my case I'd like to experiment with building a query expression by
translating GraphQL query operators to Expression values and then write
"adapters"/"drivers" that can implement the optimized query expression:
```gql
query {
users(where: { id: { gt: 10 }, name: { like: "%Joe" }, limit: 5) {
id
name
todos(where: { is_completed: { eq: false } }) {
description
}
}
}
```
```rs
let users = ctx.table("users");
let project = ["id", "name"];
let joins = ["todos"];
let user_filter = and(col("id").gt(lit(10)), col("name").like("%Joe"));
let df = df.select_columns(&project)?.filter(&user_filter)?.join(&joins);
// Run query planning + optimization, convert to LogicalPlan
// Execute LogicalPlan against SQL DB
```
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