Insert Default

[billy1624]

PR Info

• Closes Insert default values behaviour #253
• Continues Insert Default #223

• Dependents:

Adds

• Insert default
• InsertStatement::or_default_values method

References

• MySQL: https://dev.mysql.com/doc/refman/8.0/en/insert.html
• PostgreSQL: https://www.postgresql.org/docs/9.1/dml-insert.html
• SQLite: https://www.sqlite.org/lang_insert.html

[tyt2y3]

Okay I am just being curious, does MySQL/Pg/SQLite actually allow multiple DEFAULT VALUES?
I mean inserting multiple rows in one statement

[tyt2y3]

it does seem like it's only for inserting one row

[billy1624]

It will insert only one row with default values

[ikrivosheev]

@billy1624 can you resolve the merge conflict?

[tyt2y3]

MySQL/Pg/SQLite actually allow multiple DEFAULT VALUES?

I think we need to investigate this and if it's valid SQL supported by at least 2 DB we should implement accordingly

[billy1624]

Yes, it's possible to insert multiple default rows in single insert statement on MySQL & PostgreSQL but not SQLite

Demo

• PostgreSQL: https://dbfiddle.uk/?rdbms=postgres_14&fiddle=028aaaef2ba22652f3d647ab758d39a4
• MySQL: https://dbfiddle.uk/?rdbms=mysql_8.0&fiddle=c30eb9bd39a8e82c053d463f14ac3df3
• MariaDB: https://dbfiddle.uk/?rdbms=mariadb_10.6&fiddle=c30eb9bd39a8e82c053d463f14ac3df3
• SQLite: https://dbfiddle.uk/?rdbms=sqlite_3.27&fiddle=0f22bc8c9b09c0e6d295771239292e1c

[tyt2y3]

Well then may be we should further work on it

[billy1624]

Well then may be we should further work on it

I have added a method, or_default_values_many, for inserting multiple rows with default values

[ikrivosheev]

@billy1624 thank you! Some comments.

[ikrivosheev]

@billy1624 LGTM!

[tyt2y3]

Cool. I think the important piece is how we are implementing the backend