7 string references to 'Undefined' in Drupal 9

ConfigSchemaTest::testSchemaMapping in core/tests/Drupal/KernelTests/Core/Config/ConfigSchemaTest.php

Tests the basic metadata retrieval layer.

core.data_types.schema.yml in core/config/schema/core.data_types.schema.yml

core/config/schema/core.data_types.schema.yml

core.data_types.schema.yml in core/config/schema/core.data_types.schema.yml

core/config/schema/core.data_types.schema.yml

database_test_schema in core/modules/system/tests/modules/database_test/database_test.install

Implements hook_schema().

InsertDefaultsTest::testDefaultInsert in core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php

Tests that we can run a query that uses default values for everything.

InsertDefaultsTest::testDefaultInsertWithFields in core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php

Tests that we can insert fields with values and defaults in the same query.

ViewTestData::schemaDefinition in core/modules/views/src/Tests/ViewTestData.php

Returns the schema definition.