What database to choose for comments, and search through them?

Question

Database

Good afternoon.
There is a project in which a large number of comments are implied. Due to my inexperience, the initial level in development, the question arose:
Which database should I choose for comments?
A mandatory search by comments is implied and it should be fast (I understand that this is most likely the choice of a base for storing comments and the search is an independent task, since there are separate things for the search such as a sphinx, elastic, etc., and there are their own, separate story, but still decided to mention it).
The entire project uses InnoDB. Yii2 project Thanks
in advance.

Answer 1

Postgresql -
Sphinxsearch storage - search