[OpenGauss] Can not set TRANSACTION ISOLATION LEVEL

[yu199195]

Dear Apache ShardingSphere Community:

I'm using ShardingSphere-Proxy for openGuass.
Refer this doc[1] set TRANSACTION ISOLATION LEVEL.

Error message like this :

=> begin;
BEGIN
=> SET LOCAL TRANSACTION ISOLATION LEVEL READ COMMITTED READ ONLY;
ERROR:  You have an error in your SQL syntax: SET LOCAL TRANSACTION ISOLATION LEVEL READ COMMITTED READ ONLY;, no viable alternative at input 'TRANSACTIONISOLATION' at line 1, position 22, near [@3,22:30='ISOLATION',<246>,1:22]

I think it should be a sql parse problem.

Are there any volunteers interested in this , welcome to fixed it.

[1] https://docs.opengauss.org/zh/docs/3.0.0/docs/Developerguide/SET-TRANSACTION.html