No support for query parameters

[robertluo]

A common scenario is a parameterized query, not plain scalar value. Like in JDBC SQL, one can easily using ? in statement to prepare a statement, while supply the real value in query time. This allows

• No need to compose query pattern.
• better performance, since the query itself not changed, hence can be precompiled.

suggestion

User can use input parameters in the statement, like ~username will introduce a input parameter on preparing the statement, and supply the value when run this query.