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I think it would be helpful to have a function to make inner joins more clear for people getting started with Opaleye, since it's a concept directly from relational DBs.
We can easily join on a tab…
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One of the large sources of "funext" is this definition https://github.com/ualib/agda-algebras/blob/5a5687e95672d3648ffe4130a9a68afb4e0e9faf/UniversalAlgebra/Relations/Discrete.lagda#L77-L79 of `Op`.
…
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For a sql query, we first translate it into a logical plan. Each time, we get rid of the highest operator and then convert this sub plan into both batch and streaming plan.
In the end, we would have …
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Currently, we do PK derivation in frontend, but how to access schema and pk_indices in backend? There are two ways in our repo:
1. Pass the schema (and pk_indices) to backend node in `StreamNode::f…
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I just realized that with very little work I could have my GHCJS front-end build up Project:M36 queries directly. It could then send them to a websocket on my server and get the results directly. All …
3noch updated
6 years ago
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Multistage engine and multivalue column semantics incompatibilities
In Pinot filtering on a multivalue column with `=` operator actually a *contains* operator, aggregation to a multivalue column i…
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## State of the Art
At the moment, the optimized plan of the for the following query:
```sql
SELECT
L.x, L.y, R.y, R.z
FROM
L LEFT OUTER JOIN R ON L.y = R.y
```
renders as follow…
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Tasks to this:
1. Find a set of queries that will have repeated "Branches" of relational algebra nodes. These will be our test set
2. Figure out if Calcite can provide us with a different representa…
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I think is good idea to define the scope of this crate. Also, to look at libraries/specifications like
- DB-API (python): https://www.python.org/dev/peps/pep-0249/
- ADO.NET: https://docs.microso…
mamcx updated
5 years ago
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[reporter="angel", created="Sat, 19 Aug 2006 20:12:13 -0500 (GMT-05:00)"]
Please fix so the following tests in SqlOperatorTests runs under FarragoAutoVmOperatorTest.
- testWindow
- testCountFunc
- te…