feat: Use DuckDB for examples data in Docker development environment (#34831)

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Beto Dealmeida <roberto@dealmeida.net>

docker/docker-init.sh

@@ -69,6 +69,8 @@ echo_step "3" "Complete" "Setting up roles and perms"
 if [ "$SUPERSET_LOAD_EXAMPLES" = "yes" ]; then
     # Load some data to play with
     echo_step "4" "Starting" "Loading examples"
+
+
     # If Cypress run which consumes superset_test_config – load required data for tests
     if [ "$CYPRESS_CONFIG" == "true" ]; then
         superset load_examples --load-test-data

docker/pythonpath_dev/superset_config.py

@@ -49,12 +49,18 @@ SQLALCHEMY_DATABASE_URI = (
     f"{DATABASE_HOST}:{DATABASE_PORT}/{DATABASE_DB}"
 )
 
-SQLALCHEMY_EXAMPLES_URI = (
-    f"{DATABASE_DIALECT}://"
-    f"{EXAMPLES_USER}:{EXAMPLES_PASSWORD}@"
-    f"{EXAMPLES_HOST}:{EXAMPLES_PORT}/{EXAMPLES_DB}"
+# Use environment variable if set, otherwise construct from components
+# This MUST take precedence over any other configuration
+SQLALCHEMY_EXAMPLES_URI = os.getenv(
+    "SUPERSET__SQLALCHEMY_EXAMPLES_URI",
+    (
+        f"{DATABASE_DIALECT}://"
+        f"{EXAMPLES_USER}:{EXAMPLES_PASSWORD}@"
+        f"{EXAMPLES_HOST}:{EXAMPLES_PORT}/{EXAMPLES_DB}"
+    ),
 )
 
+
 REDIS_HOST = os.getenv("REDIS_HOST", "redis")
 REDIS_PORT = os.getenv("REDIS_PORT", "6379")
 REDIS_CELERY_DB = os.getenv("REDIS_CELERY_DB", "0")