ConstReadonlyTABLE_TRIGGER_CONDITION_ALL_UPDATED: "TABLE_TRIGGER_CONDITION_ALL_UPDATED"Fire only once every source table has updated.
ReadonlyTABLE_TRIGGER_CONDITION_ANY_UPDATED: "TABLE_TRIGGER_CONDITION_ANY_UPDATED"Fire when any source table updates.
ReadonlyTABLE_TRIGGER_CONDITION_UNSPECIFIED: "TABLE_TRIGGER_CONDITION_UNSPECIFIED"Default value, not used. Treated as TABLE_TRIGGER_CONDITION_ANY_UPDATED.
Which source table updates trigger a materialization run.