On a dummy change for BlueSpiceSkin ( https://gerrit.wikimedia.org/r/c/mediawiki/skins/BlueSpiceSkin/+/323201 ), commenting `check experimental` runs a #Quibble job that fails with:
```
Wikimedia\Rdbms\DBQueryError from line 1443 of includes/libs/rdbms/database/Database.php: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading?
Query: INSERT INTO unittest_interwiki (iw_prefix,iw_url,iw_local) VALUES ('Dummy','http://wiki.dummy.org/$1','1')
Function: Wikimedia\Rdbms\DatabaseSqlite::insert/single-row
Error: 19 NOT NULL constraint failed: unittest_interwiki.iw_api
Backtrace:
#0 includes/libs/rdbms/database/Database.php(1413): Wikimedia\Rdbms\Database->makeQueryException(string, integer, string, string)
#1 includes/libs/rdbms/database/Database.php(1186): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#2 includes/libs/rdbms/database/Database.php(2010): Wikimedia\Rdbms\Database->query(string, string)
#3 includes/libs/rdbms/database/DatabaseSqlite.php(647): Wikimedia\Rdbms\Database->insert(string, array, string, string)
#4 extensions/BlueSpiceFoundation/tests/phpunit/Api/BSApiInterwikiStoreTest.php(46): Wikimedia\Rdbms\DatabaseSqlite->insert(string, array)
#5 extensions/BlueSpiceFoundation/tests/phpunit/BSApiExtJSStoreTestBase.php(30): BlueSpice\Tests\Api\BSApiInterwikiStoreTest->createStoreFixtureData()
#6 tests/phpunit/MediaWikiTestCase.php(462): BlueSpice\Tests\BSApiExtJSStoreTestBase->addDBDataOnce()
#7 vendor/phpunit/phpunit/src/Framework/TestSuite.php(755): MediaWikiTestCase->run(PHPUnit\Framework\TestResult)
#8 vendor/phpunit/phpunit/src/Framework/TestSuite.php(755): PHPUnit\Framework\TestSuite->run(PHPUnit\Framework\TestResult)
#9 vendor/phpunit/phpunit/src/Framework/TestSuite.php(755): PHPUnit\Framework\TestSuite->run(PHPUnit\Framework\TestResult)
#10 vendor/phpunit/phpunit/src/Framework/TestSuite.php(755): PHPUnit\Framework\TestSuite->run(PHPUnit\Framework\TestResult)
#11 vendor/phpunit/phpunit/src/TextUI/TestRunner.php(546): PHPUnit\Framework\TestSuite->run(PHPUnit\Framework\TestResult)
#12 vendor/phpunit/phpunit/src/TextUI/Command.php(195): PHPUnit\TextUI\TestRunner->doRun(PHPUnit\Framework\TestSuite, array, boolean)
#13 vendor/phpunit/phpunit/src/TextUI/Command.php(148): PHPUnit\TextUI\Command->run(array, boolean)
#14 tests/phpunit/phpunit.php(134): PHPUnit\TextUI\Command::main()
#15 maintenance/doMaintenance.php(94): PHPUnitMaintClass->execute()
#16 tests/phpunit/phpunit.php(173): require(string)
#17 {main}
```
The insert statement does:
| Field | Value
|--|--
| iw_prefix | 'Dummy'
| iw_url | 'http://wiki.dummy.org/$1'
| iw_local | '1'
And the schema in mediawiki/core shows that none of the `interwiki` table fields accepts null values:
```
lang=sql, name=maintenance/tables.sql
CREATE TABLE /*_*/interwiki (
-- The interwiki prefix, (e.g. "Meatball", or the language prefix "de")
iw_prefix varchar(32) NOT NULL,
-- The URL of the wiki, with "$1" as a placeholder for an article name.
-- Any spaces in the name will be transformed to underscores before
-- insertion.
iw_url blob NOT NULL,
-- The URL of the file api.php
iw_api blob NOT NULL,
-- The name of the database (for a connection to be established with LBFactory::getMainLB( 'wikiid' ))
iw_wikiid varchar(64) NOT NULL,
-- A boolean value indicating whether the wiki is in this project
-- (used, for example, to detect redirect loops)
iw_local bool NOT NULL,
-- Boolean value indicating whether interwiki transclusions are allowed.
iw_trans tinyint NOT NULL default 0
) /*$wgDBTableOptions*/;
```
Note the job used SQLite. I thought the issue could be due MariaDB set with `sql_mode = 'TRADITIONAL'` ( T119371 ) which causes an error when previously it was just a warning.