Liyao Miao created GSOC-246:
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Summary: Apache ShardingSphere: Write a converter to generate
DistSQL
Key: GSOC-246
URL: https://issues.apache.org/jira/browse/GSOC-246
Project: Comdev GSOC
Issue Type: Improvement
Reporter: Liyao Miao
h1. Apache ShardingSphere
Apache ShardingSphere is positioned as a Database Plus, and aims at building a
standard layer and ecosystem above heterogeneous databases. It focuses on how
to reuse existing databases and their respective upper layer, rather than
creating a new database. The goal is to minimize or eliminate the challenges
caused by underlying databases fragmentation.
Page: https://shardingsphere.apache.org/
Github: https://github.com/apache/shardingsphere
h1. Background
Currently we try to promote StorageNode as major CRD to represent a set of
storage units for ShardingSphere.
h1. Task
The elementary task is that the storage node controller could manage the
lifecycle of a set of storage units, like PostgreSQL, in kubernetes.
We don't hope to create another wheel like pg-operator. So consider using a
predefined parameter group to generate the target CRD.
- [ ] Generate DistSQL according to the Golang struct `EncryptionRule`
- [ ] Generate DistSQL according to the Golang struct `ShardingRule`
- [ ] Generate DistSQL according to the Golang struct `ReadWriteSplittingRule`
- [ ] Generate DistSQL according to the Golang struct `MaskRule`
- [ ] Generate DistSQL according to the Golang struct `ShadowRule`
h1.
Relevant Skills
1. Master Go language, Ginkgo test framework
2. Have a basic understanding of Apache ShardingSphere Concepts and DistSQL
h1. Targets files
DistSQL Converter -
https://github.com/apache/shardingsphere-on-cloud/blob/main/shardingsphere-operator/pkg/distsql/converter.go,
etc.
h2. Example
A struct defined as below:
```golang
type EncryptRule struct{}
func (t EncryptRule) ToDistSQL() string {}
```
While invoking ToDistSQL() it will generate a DistSQL regarding a EncryptRule
like:
```SQL
CREATE ENCRYPT RULE t_encrypt (....
```
h1. References:
*
https://shardingsphere.apache.org/document/current/en/user-manual/shardingsphere-proxy/distsql/syntax/rdl/rule-definition/encrypt/create-encrypt-rule/
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