https://github.com/lewuathe/tiny-presto
Lightweight Presto pluster for verifying query result consistency
https://github.com/lewuathe/tiny-presto
docker presto sql
Last synced: about 2 months ago
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Lightweight Presto pluster for verifying query result consistency
- Host: GitHub
- URL: https://github.com/lewuathe/tiny-presto
- Owner: Lewuathe
- License: apache-2.0
- Created: 2020-01-14T10:34:09.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2024-12-17T07:03:14.000Z (10 months ago)
- Last Synced: 2025-07-29T16:12:54.512Z (2 months ago)
- Topics: docker, presto, sql
- Language: Ruby
- Homepage: https://rubygems.org/gems/tiny-presto
- Size: 30.3 KB
- Stars: 3
- Watchers: 1
- Forks: 5
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# tiny-presto [](https://github.com/Lewuathe/tiny-presto/actions/workflows/ruby.yml)  
Tiny [Trino](https://trino.io/) cluster to check the compatibility of query result by using the specific Trino version.
**NOTE: The brand name of [Presto was migrated to Trino](https://trino.io/blog/2020/12/27/announcing-trino.html). Although the internal docker image used in tiny-presto was also migrated to [Trino](https://hub.docker.com/r/trinodb/trino), we keep the package name `tiny-presto` to avoid the installation trouble.**
# Install
```
$ gem install tiny-presto
```
# Prerequisites
tiny-presto uses Docker to run single node Presto cluster. Please ensure to install the Docker engine properly in advance.
See [Docker Engine overview](https://docs.docker.com/install/)
# Usage
You can run the query easily as follows.
```ruby
rows = TinyPresto.run('show schemas')
# => [["default"], ["information_schema"]]
```
As tiny-presto uses the memory connector as default, it is also possible to create a table.
```ruby
TinyPresto.run("create table ctas1 as select * from (values (1, 'a'), (2, 'b')) t(c1, c2)")
rows = TinyPresto.run("select * from ctas1")
# => [[1, 'a'], [2, 'b']]
```
To check the result consistency, `verify` method is available.
```ruby
result = TinyPresto.verify('show schemas', [["default"], ["information_schema"]])
# result is true if the returned value by the query matched with the given expected result.
```
To ensure to delete the tiny-presto cluster, make sure to call `ensure_stop` before exiting.
```ruby
TinyPresto.ensure_stop
```