Without more information it’s hard to tell what this actually is but it looks a lot like JPQL which is JPA’s SQL like query language. In JPQL the meaning of SELECT o FROM ctrData o would be: ctrData would be the name of an entity (i.e. a mapped data class) ctrData o would create an alias to refer to that entity SELECT o FROM ctrData o would thus mean you want to select all instances of that …
