Postgres sqlx prepared statement with table name bindvar

问题

I am trying to create a prepared statement in using the Golang sqlx library. I want to have the table name be a bindVar

stmt, err := stmtTx.Preparex("SELECT * FROM $1 WHERE question_id=$2;")

However this gives me an syntax error around /$1/. Can I not use a bind var for the table name?

回答1:

Can I not use a bind var for the table name?

No, source of quote.

The arguments can only be used as data values, not as identifiers. Thus for example this is reasonable:

INSERT INTO mytable VALUES ($1);

but this will not work:

INSERT INTO $1 VALUES (42);

But you can use fmt.Sprintf for the table name if you want but leave the $1, $2, ... for the data values.

回答2:

See this page for a general solution:

http://www.postgresql.org/docs/9.1/static/ecpg-dynamic.html

来源：https://stackoverflow.com/questions/25631006/postgres-sqlx-prepared-statement-with-table-name-bindvar