ObjectNotExecutableError when executing any SQL query using AsyncEngine

Question

I’m using async_engine. When I try to execute anything:

async with self.async_engine.connect() as con:
    query = "SELECT id, name FROM item LIMIT 50;"
    result = await con.execute(f"{query}")

I’m getting:

Exception has occurred: ObjectNotExecutableError
Not an executable object: 'SELECT id, name FROM item LIMIT 50;'

This question was asked before by user @stilmaniac but it is now deleted from SO.

I found it in Google Search cache, here is copy.

I have the same issue so I’m reasking it, but the original version is below:

I’m trying to create tables from metadata as follows:

Base = declarative_base()

properties = Table(
    'properties', Base.metadata,
    # ...
    Column('geolocation', Geography(geometry_type='POINT', srid=4326)),
    # ... 
)

engine = create_async_engine("postgresql+asyncpg://user:password@postgres/")
async with engine.begin() as conn:
    await conn.run_sync(Base.metadata.create_all)

Gives me the following error:

sqlalchemy.exc.ObjectNotExecutableError: Not an executable object: 'CREATE INDEX "idx_properties_geolocation" ON "properties" USING GIST ("geolocation")'

Considering this doc

Versions:

OS: macOS 11.4 ARM
SQLAlchemy: 1.4.22
Python: 3.6

Asked By: Karol Zlot

||

Source

Answer 1

As the exception message suggests, the str 'SELECT id, name FROM item LIMIT 50;' is not an executable object. To make it executable, wrap it with sqlalchemy.text.

from sqlalchemy import text

async with self.async_engine.connect() as con:
    query = "SELECT id, name FROM item LIMIT 50;"
    result = await con.execute(text(query))

async.connection.execute requires that its statement argument

[…] is always an object that is in both the ClauseElement and
Executable hierarchies, including:

Select

Insert, Update, Delete

TextClause and TextualSelect

DDL and objects which inherit from DDLElement

The synchronous connection.execute method permits raw strings, but this is deprecated in v1.4 and has been removed in SQLAlchemy 2.0.

Answered By: snakecharmerb

Answer 2

This issue is related to below thread: https://github.com/pandas-dev/pandas/issues/51061

Workaround: To avoid this bug, I just reverted the version of SQLAlchemy back to older than 2.0 :

Firstly, Confirm if your SQLAlchmey version is 2.0 or beyond. To do so,
execute: pip show sqlalchemy

Verify current version from output:
Name: SQLAlchemy
Version: 2.0.9

Summary: Database Abstraction Library
Home-page: https://www.sqlalchemy.org
Author: Mike Bayer
Author-email: [email protected]
License: MIT
Location: /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages
Requires: typing-extensions
Required-by: pandasql
sguharay@s-guharay-n60cm month_end_stats % pip install SQLAlchemy== –use-deprecated=legacy-resolver

Revert back to older version(install a specific version of SQLAlchemy using below command):

pip install SQLAlchemy==1.4.17

Confirm the version once:
pip show sqlalchemy

Rerun your script.
It works for me.

Thanks, let me know if this helped you.

Answered By: Shamik Guha Ray

ObjectNotExecutableError when executing any SQL query using AsyncEngine

Question:

Answers: