How to insert comment or fragment in sql?

[canuran]

Such as select name from user /* shard_id=1 */ where name like 'can%', the shard_id comment is to tell the database proxy how to route to the sharded database.

Suggest: SELECT(User.Name).FROM(User).FRAG(FRAG("/* shard_id=1 */").BeforeWhere()).WHERE(...)

[go-jet]

Hi @canuran
Can you use optimizer hints instead?

[canuran]

Hi @canuran Can you use optimizer hints instead?

It seems impossible, optimizer_hints can only be used for mysql and the format is fixed, not suitable for prompting db proxy.

[houten11]

What database proxy are you using? Does a comment have to appear at a specific position inside the statement?