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import pandas as pd
import mysql.connector
import json
from base64 import b64decode as base_b64decode
import logging
import datetime
import os
from sqlalchemy import create_engine as sqlalchemy_create_engine
from pandas import read_sql as pd_read_sql
import sys

releaseId = '275.2'
releaseType = 'deployed'
replicationTarget = 'SOURCE'
catalogId = ''
opId = 'HOB'
buId = 'DEFAULT'
replicationJobId = 'REP_990_234'
json_file_path = "/app/scripts/PPM_Release_Management/Product_Catalog_ETL/config/ppm_reply.json"
sql_log_file = f"/app/scripts/PPM_Release_Management/Product_Catalog_ETL/logs/{replicationJobId}ppm_reply.sql"
log_file = f'/app/scripts/PPM_Release_Management/Product_Catalog_ETL/logs/{replicationJobId}ppm_reply.log'
# sql_log_file = os.get_path("PPM_PC_LOG") + "/" + replicationJobId + "_ppm_pc_replication_delete.sql"
# json_file_path = os.get_path("PPM_PC_CONFIG") + "/ppm_pc_replication.json"
# log_file = os.get_path("PPM_PC_LOG") + "/" + replicationJobId + "_ppm_pc_replication_delete.log"

# Set up logging
logging.basicConfig(
    filename=log_file,
    level=logging.INFO,
    format='%(asctime)s - %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S'
)
query_count = 0

# Open SQL log file for writing
sql_log_file = open(sql_log_file, "w")

# Function to write SQL query to the log file
def write_sql(query_info):
    sql_log_file.write(query_info)
    sql_log_file.write('\n')


try:
    # Function to establish a database connection
    def connect_to_database(json_data, replicationTarget):
        try:
            encrypt = json_data.get(replicationTarget, {}).get('ENCRYPT')
            host = json_data.get(replicationTarget, {}).get('DB_HOST')
            port = json_data.get(replicationTarget, {}).get('DB_PORT')
            user = json_data.get(replicationTarget, {}).get('DB_USER')
            db_type = json_data.get(replicationTarget, {}).get('DB_TYPE')
            schema = json_data.get(replicationTarget, {}).get('DB_SCHEMA')
            if encrypt == 'Y':
                password = b64decode(json_data.get(replicationTarget, {}).get('DB_PASSWORD')).decode('utf-8')
            else:
                password = json_data.get(replicationTarget, {}).get('DB_PASSWORD')

            if db_type == 'MYSQL':
                cnx = mysql.connector.connect(user=user, password=password, host=host, port=port)
                cursor = cnx.cursor()
                logging.info(f"Connected to MySQL database server {replicationTarget}: {host}:{port}")

            elif db_type == 'ORACLE':
                import oracledb
                oracle_mode = oracledb.is_thin_mode()
                print("Oracle mode: %s" % oracle_mode)

                if oracle_mode:
                    oracledb.init_oracle_client()
                    print("Enabled python-oracledb Thick mode")
                else:
                    print("Default python-oracledb Thick mode")

                cnx_text = ('oracle://%s:%s@%s:%s/?service_name=%s' % (user, password, host, port, schema))
                cnx = create_engine(cnx_text, encoding="utf8").raw_connection()
                cursor = cnx.cursor()

            return cnx, cursor, schema

        except (mysql.connector.Error, sqlalchemy.exc.SQLAlchemyError, ImportError, Exception) as e:
            logging.error(f"An error occurred while connecting to the database: {str(e)}")
            raise e
can you modify above code like
Method "connect_to_database" on failed db connect to have a single point of exit. (Always a function to have single point of exit, not multiple returns)