Drupal Association members fund grants that make connections all over the world.
EntityFieldQuery::propertyCondition() and EntityFieldQuery::addFieldCondition() allow operators to be omitted. In this case, NULL is passed on to SelectQuery, which decides whether to use IN or =. The attached patches document this behavior.
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch entityfieldquery_condition_operator_docs_d8_00.patch. This may be a -p0 (old style) patch, which is no longer supported by the testbots. View
PASSED: [[SimpleTest]]: [MySQL] 32,924 pass(es). View