In several database related classes (SqlSensor, MySqlOperator, MsSqlOperator, OracleOperator, PostgresOperator, JdbcOperator, SqliteOperator, ...) exists a possibility to use parameters with a SQL statement, but templating is not enabled on the parameters, only on the SQL statement itself.
Not using parameters has a performance impact on the database. The db has to parse a SQL statement to find an optimized way to execute it. Because this operation is a performance bottleneck the calculated execution plan is cached and reused when the exact same statement is executed again. But the database only caches a certain number of execution plans, if one application unnecessarily litters the cache with a lot of similar statements, other applications suffer. (More detailed explanation: https://www.akadia.com/services/ora_bind_variables.html)
Therefore please add templating to the parameters so that the actual SQL statement doesn't need to change between runs.
template_fields = ('sql',) # type: Iterable[str]
template_fields = ('sql', 'parameters',) # type: Iterable[str]