Use read replica for raw queries

Issue Description

Is your feature request related to a problem? Please describe.

When executing raw SQL queries, sequelize always uses the write host.

Describe the solution you’d like

When you know that your raw SQL query is a read-only query, it would be great to be able to delegate to the read replica.

Why should this be in Sequelize

Seems like a pretty common usecase that could benefit a lot of people. Limiting the read replica use to only queries generated from models is not ideal.

Describe alternatives/workarounds you’ve considered

Can’t think of any.

Additional context

I tried to pass { type: QueryTypes.SELECT } to the .query method thinking that might use the read replica but no luck.

Issue Template Checklist

Is this issue dialect-specific?

• No. This issue is relevant to Sequelize as a whole.
• Yes. This issue only applies to the following dialect(s): XXX, YYY, ZZZ

Would you be willing to resolve this issue by submitting a Pull Request?

• Yes, I have the time and I know how to start.
• Yes, I have the time but I don’t know how to start, I would need guidance.
• No, I don’t have the time, although I believe I could do it if I had the time…
• No, I don’t have the time and I wouldn’t even know how to start.

[yocontra]

@mellogarrett FYI you can use type: 'SELECT', useMaster: false in the options as a workaround

[ErickVal]

@mellogarrett FYI you can use type: 'SELECT', useMaster: false in the options as a workaround

Tried this and Worked, thank you very much.

“sequelize”: “^5.21.12”,