Sure, use an explicit transaction: https://docs.sqlalchemy.org/en/13/core/connections.html#using-transactions
with connection.begin() as trans: # might as well lift this out of the loop insert = table.insert() for datum in data: statement = insert.values(**datum).returning(table.c.rowid) # etc. Simon On Thu, Nov 28, 2019 at 9:57 AM Javier Collado Jiménez <collado...@gmail.com> wrote: > > Is there a way, at least, of preventing commit in every insert? > Doing that: > for datum in data: > > statement=table.insert().values(**datum).returning(table.c.rowid) > inserted_rowids=conn.execute(statement) > rowid=inserted_rowids.fetchone()[0] > there is a commit after every insert > > El miércoles, 27 de noviembre de 2019, 19:07:31 (UTC+1), Mike Bayer escribió: >> >> >> >> On Wed, Nov 27, 2019, at 1:05 PM, Javier Collado Jiménez wrote: >> >> One more thing about returning data. When I insert rows one by one, it works: >> for datum in data: >> >> statement=table.insert().values(**datum).returning(table.c.rowid) >> inserted_rowids=conn.execute(statement) >> rowid=inserted_rowids.fetchone()[0] >> >> But when I try to do it in a bundle if there is more than one row: >> statement=table.insert().returning(table.c.rowid) >> inserted_rowids=conn.execute(statement, data) >> for rowid in inserted_rowids: >> print(rowid) >> >> File >> "/home/pyweb/projects/T4toBHStore/lib/python3.4/site-packages/sqlalchemy/engine/result.py", >> line 1266, in fetchone >> row = self._fetchone_impl() >> File >> "/home/pyweb/projects/T4toBHStore/lib/python3.4/site-packages/sqlalchemy/engine/result.py", >> line 1146, in _fetchone_impl >> return self.cursor.fetchone() >> cx_Oracle.InterfaceError: not a query >> >> >> Is there a way to do a batch insert and recover every rowid? >> >> >> >> unfortunately no, DBAPI drivers do not support RETURNING with executemany(). >> >> >> >> >> Thank you!! >> >> >> El miércoles, 20 de noviembre de 2019, 16:39:36 (UTC+1), Mike Bayer escribió: >> >> >> >> On Wed, Nov 20, 2019, at 9:05 AM, Javier Collado Jiménez wrote: >> >> Hello, >> >> Using ORM, i'm inserting like that: >> >> session.add(table_mapper(**datum)) >> >> And updating: >> >> session.query(dest_table).filter_by(**filters).filter(filter_column > >> from_date).update(datum, synchronize_session=False) >> >> >> Is there a way to get returning rowid of the rows affected. >> >> I want to keep them to be used in further updates (it's really faster if you >> use rowid in UPDATE WHERE clause) >> >> >> you would need to construct a core UPDATE statement adding this column using >> returning() (see >> https://docs.sqlalchemy.org/en/13/core/dml.html?highlight=returning#sqlalchemy.sql.expression.Update.returning >> ). You might want to add it to your table definition as a "system" column >> perhaps, not really sure. making a system column is illustrated at >> https://docs.sqlalchemy.org/en/13/orm/versioning.html?highlight=system#server-side-version-counters >> >> >> >> >> -- >> SQLAlchemy - >> The Python SQL Toolkit and Object Relational Mapper >> >> http://www.sqlalchemy.org/ >> >> To post example code, please provide an MCVE: Minimal, Complete, and >> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >> description. >> --- >> You received this message because you are subscribed to the Google Groups >> "sqlalchemy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sqlal...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sqlalchemy/cc45324e-e194-4030-b9f7-a48a36c19747%40googlegroups.com. >> >> >> >> -- >> SQLAlchemy - >> The Python SQL Toolkit and Object Relational Mapper >> >> http://www.sqlalchemy.org/ >> >> To post example code, please provide an MCVE: Minimal, Complete, and >> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >> description. >> --- >> You received this message because you are subscribed to the Google Groups >> "sqlalchemy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to sqlal...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/sqlalchemy/5701f7d0-d8fb-4c32-97d9-396af37f8bcb%40googlegroups.com >> >> > -- > SQLAlchemy - > The Python SQL Toolkit and Object Relational Mapper > > http://www.sqlalchemy.org/ > > To post example code, please provide an MCVE: Minimal, Complete, and > Verifiable Example. See http://stackoverflow.com/help/mcve for a full > description. > --- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sqlalchemy/a1373cde-5de6-4d54-84dc-aa980d467f09%40googlegroups.com. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. 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