adding example table-with-default-timestamp.py

thanks to @sfc-gh-mraba

Author: sfc-gh-dszmolka

examples/table-with-default-timestamp.py

@@ -0,0 +1,38 @@
+# courtesy of sfc-gh-mraba
+from sqlalchemy import (
+    Column,
+    Integer,
+    String,
+    func,
+)
+from sqlalchemy.orm import Session, declarative_base
+from snowflake.sqlalchemy import TIMESTAMP_NTZ
+
+Base = declarative_base()
+
+class TWTS(Base):
+    __tablename__ = "table_with_timestamp"
+
+    pk = Column(Integer, primary_key=True)
+    name = Column(String(30))
+    created = Column(TIMESTAMP_NTZ, server_default=func.now())
+
+    def __repr__(self) -> str:
+        return f"TWTS({self.pk=}, {self.name=}, {self.created=})"
+
+Base.metadata.create_all(engine_testaccount)
+
+session = Session(bind=engine_testaccount)
+r1 = TWTS(pk=1, name="edward")
+r2 = TWTS(pk=2, name="eddy")
+assert r1.created is None
+assert r2.created is None
+
+session.add(r1)
+session.add(r2)
+session.commit()
+
+rows = session.query(TWTS).all()
+assert len(rows) == 2
+for row in rows:
+    print(row)