![]() Specify rver_default or which make use of Values from that single row, including values for any columns that Populated with a Row named-tuple representing the full range In these cases, when the CursorResult is returnedįrom the statement’s execution, not only willĬursorResult.inserted_primary_key be populated as always, theĬursorResult.returned_defaults attribute will also be Table.implicit_returning parameter at its default value of RETURNING and for Table objects that maintain the UpdateBase.return_defaults() before executing the statement,Īdditional behaviors take place only for backends that support However, when the statement is modified by calling Or RETURNING are typically used to acquire the new primary key Theĭialect in use chooses the strategy to use in order to populate thisĭata if it was generated using server-side defaults and / or SQLĮxpressions, dialect-specific approaches such as cursor.lastrowid (and the Row._mapping view fully populated as well). Which stores the primary key of the row that was just inserted in theįorm of a Row object with column names as named tuple keys ![]() Normally, a single row INSERT statement will automatically populate theĬursorResult.inserted_primary_key attribute when executed, Stick with using UpdateBase.returning() in order toĪdd RETURNING clauses to their INSERT, UPDATE and DELETE ![]() Its behavior is fairly idiosyncraticĪnd is not really intended for general use. ORM feature as well as to allow RETURNING support with bulk Implementation of the Mapper.eager_defaults The UpdateBase.return_defaults() method is used by the ORMįor its internal work in fetching newly generated primary keyĪnd server default values, in particular to provide the underyling This applies only to an executemanyĮxecution for supporting dialects and typically makes use of the RETURNING so that the returned rows correspond to the order of *cols ¶ – series of columns, SQL expressions, or whole tablesĮxecuted against multiple parameter sets, organize the results of Order to determine the availability of RETURNING. Read the documentation notes for the database in use in Varies greatly, including restrictions on executemany()Īnd other statements which return multiple rows. For those backends with no support,Īn exception is raised upon compilation and/or execution.įor those who do support it, the functionality across backends cx_oracle), SQLAlchemy willĪpproximate this behavior at the result level so that a reasonableĪmount of behavioral neutrality is provided. Upon execution, the values of the columns to be returned are madeĪvailable via the result set and can be iterated using The values are those of the rows which were deleted. The values are the newly inserted/updated values. Upon compilation, a RETURNING clause, or database equivalent, first_name || : first_name_1 || some_table. INSERT INTO some_table ( first_name, last_name ) VALUES (: first_name, : last_name ) RETURNING some_table. INSERT statement’s table, the statement will be correlated If a SELECT statement is specified which references this Each key may reference one of:Ī literal data value (i.e. The keys within Insert.values can be either Information specified within insert.values on a Parameters are present, the compile-time bind parameters override the If both insert.values and compile-time bind Statement without the need to pre-execute them beforehand forīackends that support “returning”, this turns off the “implicit This allows SQL expressions to be rendered ‘inline’ within the SQL-generated default values to be provided within the statement Inline ¶ – if True, no attempt will be made to retrieve the Will also dynamically render the VALUES clause at execution timeīased on the parameters passed to Connection.execute(). ![]() Values ¶ – collection of values to be inserted seeįor a description of allowed formats here.Ĭan be omitted entirely a Insert construct Using INSERT Statements - in the SQLAlchemy Unified Tutorial Parameters : SQL Expression Language Foundational Constructs.Custom SQL Constructs and Compilation Extension.UpdateBase.returning_column_descriptions.
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