package com.example.spring.service.sql; import com.mysema.query.sql.SQLTemplates; import com.mysema.query.types.OrderSpecifier; import com.mysema.query.types.expr.StringExpression; import com.mysema.query.types.path.StringPath; import com.mysema.query.types.template.StringTemplate; /** * Interface to handle multiple database platform for QuerydslSQL. */ public interface SQLTemplatesService { SQLTemplates getTemplates(); default StringExpression groupConcat(StringPath path, OrderSpecifier orderSpecifier) { return StringTemplate.create("GROUP_CONCAT({0} order by {1})", path, orderSpecifier); } }