Fix boolean type not recognized warning

[Xnot]

This fixes a warning about boolean type not being recognized when loading a table that contains a boolean column.

[bchoudhary6415]

Hello @Xnot Can you please give me self contained example to reproduce this issue. As I tried below example and I'm not getting any warning. The "sample_table", I'm creating contains Boolean column as well.

import datetime
import decimal
import ibm_db
import ibm_db_sa
from sqlalchemy import create_engine, Table, Column, Integer, Float, String, Boolean, DateTime, Date, Numeric, MetaData, \
    select, text

# Replace the connection parameters with your own
conn_str = 'ibm_db_sa://userID:Password@host:port/database'
# Create a SQLAlchemy engine
engine = create_engine(conn_str)
# Define the metadata for the sample_table
metadata = MetaData()
sample_table = Table('sample_table', metadata,
                     Column('id', Integer, primary_key=True),
                     Column('float_col', Float),
                     Column('int_col', Integer),
                     Column('string_col', String(50)),
                     Column('bool_col', Boolean),
                     Column('datetime_col', DateTime),
                     Column('date_col', Date),
                     Column('numeric_col', Numeric(10, 2))
                     )
# Create the sample_table
metadata.create_all(engine)
# Insert some data into the sample_table
with engine.connect() as conn:
    conn.execute(sample_table.insert().values(
        id=1,
        float_col=3.14,
        int_col=42,
        string_col='hello',
        bool_col=True,
        datetime_col=datetime.datetime.now(),
        date_col=datetime.date.today(),
        numeric_col=decimal.Decimal('1234.56')
    ))
    conn.execute(sample_table.insert().values(
        id=2,
        float_col=3.14,
        int_col=42,
        string_col='hello',
        bool_col=True,
        datetime_col=datetime.datetime.now(),
        date_col=datetime.date.today(),
        numeric_col=decimal.Decimal('1234.56')
    ))
    conn.commit()
# Retrieve the data from the sample_table
with engine.connect() as conn:
    stmt = select(sample_table)
    results = conn.execute(stmt).fetchall()
    conn.commit()
# Display the results
for row in results:
    print(
        f"ID: {row[0]}, Float Col: {row[1]}, Int Col: {row[2]}, String Col: {row[3]}, Bool Col: {row[4]}, Datetime Col: {row[5]}, Date Col: {row[6]}, Numeric Col: {row[7]}")

with engine.connect() as conn:
    query = "drop table sample_table"
    conn.execute(text(query))
    conn.commit()

[Xnot]

The issue only occurs when automapping/reflecting the database. Additionally, the issue is not reproducible with your sample table example because this lib's compiler is mapping sqlalchemy's Boolean to db2's SMALLINT, so BOOL_COL is not actually boolean: If you'd like, I can add a fix for that as well or make a separate PR for it.

Here's a reproducible example where the warning occurs:

import ibm_db
import ibm_db_sa
from sqlalchemy import create_engine, text
from sqlalchemy.ext.automap import automap_base

# Replace the connection parameters with your own
conn_str = f"ibm_db_sa://userID:Password@host:port/database"
# Create a SQLAlchemy engine
engine = create_engine(conn_str)

with engine.connect() as conn:
    conn.execute(text("create table sample_schema.sample_table (bool_col boolean)"))
    conn.commit()

base = automap_base()
base.prepare(engine, schema="sample_schema")

[bchoudhary6415]

@Xnot Thank you for your response Yes you can raise a separate PR, If you want to add any fix.