CData Python Connector for Greenplum

Build 21.0.7930

Updating Data

Commands can be executed individually by the session with a call to "execute()".

Obtaining the Table Object

The query supplied to this method is constructed using the associated Table object of a mapped class. This Table object is obtained from the mapped class's metadata field, as below:

"template1"."public".Orders_table = "template1"."public".Orders.metadata.tables["\"template1\".\"public\".Orders"]

Once the table object is obtained, the write operations are executed in the following ways. The queries are executed immediately without the need for a call to "commit()":

Insert

The following example adds a new record to the table:

session.execute("template1"."public".Orders_table.insert(), {"ShipName": "Raleigh", "ShipCity": "New York"})

Update

The following example modifies an existing record in the table:

session.execute("template1"."public".Orders_table.update().where("template1"."public".Orders_table.c.Id == "10261").values(ShipName="Raleigh", ShipCity="New York"))

Delete

The following example removes an existing record from the table:

session.execute("template1"."public".Orders_table.delete().where("template1"."public".Orders_table.c.Id == "10261"))

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Build 21.0.7930