"Cannot insert multiple commands into prepared statement" issue while executing query with params

[coldmind]

(python 3.5.1, asyncpg 0.5.4)

Consider the next code

import asyncpg
import asyncio

async def run():
    con = await asyncpg.connect(user="coldmind", database="test")
    await con.execute('SELECT ($1); SELECT 2;', 1)
asyncio.get_event_loop().run_until_complete(run())

The executing fails with asyncpg.exceptions.PostgresSyntaxError: cannot insert multiple commands into a prepared statement error, while the another example (without passing params to the query) works well with multiple commands:

import asyncpg
import asyncio


async def run():
    con = await asyncpg.connect(user="coldmind", database="test")
    await con.execute('SELECT 1; SELECT 2;')
asyncio.get_event_loop().run_until_complete(run())

Why is the first example using a prepared statement instead of executing it?

[elprans]

Parameters are only supported in prepared statements, and there can be only one command per prepared statement. This is a PostgreSQL protocol limitation. asyncpg does not itself attempt to mogrify the query. We may implement that at some point (see also #9).

[coldmind]

Got it.
Maybe documentation should be clearer and will contain a note that prepared statement will be executed in that case.

[crazyhouse33]

I have the same problem with fetch( cant even do 2 selects). Is there a way of inserting stuff while using RETURNING clause while doing other queries ? I mean is there a non prepared version of fetch? The obvious workaround would be to to parse every query provided to broke them into individuals queries, but I would rather just desactive the auto prepared-statement mechanism if it is possible.