Merge pull request #16 from pangpang20/master

Add Demo and Update Database Compatibility Mode to Default Mode A

Author: liubao68

README.rst

@@ -55,6 +55,9 @@ Installation from PyPI:
     pip install gaussdb-pool
     python -c "import gaussdb; print(gaussdb.__version__)"  # Outputs: 1.0.0.dev2
 
+    # Run demo
+    python ./example/demo.py
+
 You can also clone this repository to develop GaussDB::
 
     # Create a new Python virtual environment in the .venv directory
@@ -111,8 +114,8 @@ Please add ``--config-settings editable_mode=strict`` to the ``pip install
 
 Now hack away! You can run the tests using on GaussDB::
 
-    # Create a new database named "test" with PostgreSQL compatibility enabled
-    gsql -c 'CREATE DATABASE test DBCOMPATIBILITY 'PG' ;'
+    # Create a new database named "test" with Default compatibility with Oracle enabled
+    gsql -c 'CREATE DATABASE test;'
 
     # Set the Python import path to include your local GaussDB Python project
     # Replace your_path with actual values
@@ -154,8 +157,8 @@ Recommended Steps to Run OpenGauss with Python GaussDB Driver Testing (Assuming
     # Connect to the OpenGauss database using the gsql client
     gsql -d postgres -p 5432 -U omm
 
-    -- Create a new database named "test" with PostgreSQL compatibility enabled
-    CREATE DATABASE test DBCOMPATIBILITY 'PG';
+    -- Create a new database named "test" with Default compatibility with Oracle enabled
+    CREATE DATABASE test;
 
 
     # Set the Python import path to include your local GaussDB Python project

example/demo.py

@@ -0,0 +1,50 @@
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+
+from gaussdb import connect
+
+os.environ["GAUSSDB_IMPL"] = "python"
+
+
+def main():
+    dsn = os.environ.get("GAUSSDB_TEST_DSN")
+    if not dsn:
+        print("❌ Please set the GAUSSDB_TEST_DSN environment variable, for example:")
+        print(
+            '   export GAUSSDB_TEST_DSN="dbname=test01 user=root password=***'
+            'host=** port=8000"'
+        )
+        sys.exit(1)
+
+    drop_table_sql = "DROP TABLE IF EXISTS test"
+    create_table_sql = (
+        "CREATE TABLE test (id serial PRIMARY KEY, num integer, data text)"
+    )
+    insert_data_sql = "INSERT INTO test (num, data) VALUES (%s, %s)"
+    update_data_sql = "UPDATE test SET data = 'gaussdb' WHERE num = 2"
+    select_sql = "SELECT * FROM test"
+
+    with connect(dsn, connect_timeout=10, application_name="gaussdb-demo") as conn:
+
+        with conn.cursor() as cur:
+            server_version = conn.execute("select version()").fetchall()[0][0]
+            print(f"✅ Connected. Server version: {server_version}")
+            print(f"Vendor: {conn.info.vendor}, Version: {conn.info.server_version}")
+
+            cur.execute(drop_table_sql)
+            cur.execute(create_table_sql)
+            cur.execute(insert_data_sql, (1, "hello"))
+            cur.execute(insert_data_sql, (2, "world"))
+
+            cur.execute(select_sql)
+            print("📄origin: ", cur.fetchall())
+
+            cur.execute(update_data_sql)
+            cur.execute(select_sql)
+            print("📄update: ", cur.fetchall())
+
+
+if __name__ == "__main__":
+    main()