[lemma=the] | [tag=NNS] □ □
[lemma=the] | [tag=NNS] [□] □
[lemma=the] | [tag=NNS] □ □ □
There must be ' <' and '> ' ordering operators having the same left and right input datatypes as the mergejoinable operator itself . She has examined the electrical properties of some of the thinnest dielectric films ever grown and has established the groundwork for their applications in microelectronics devices . These operators must be named ' <' and '> ' ; you do not have any choice in the matter , since there is no provision for specifying them explicitly . In the meantime it is possible to put these aggregate expressions into functions with the appropriate arguments and use them in the view definition . In the first syntax shown above , the key fields for the index are specified as column names ; a column may also have an associated operator class . One implication of this architecture is that the postmaster and the backend always run on the same machine ( the database server ) , while the frontend application may run anywhere .