<html><pre><PRE>i find i have some difficulties to understand this structure.can you help me?Thank you!</PRE><PRE>struct _DestReceiver<BR>{<BR> /* Called for each tuple to be output: */<BR> void (*receiveTuple) (HeapTuple tuple, TupleDesc typeinfo DestReceiver *self);// is it a function or others??<BR> /* Initialization and teardown: */<BR> void (*setup) (DestReceiver *self, TupleDesc typeinfo);<BR> void (*cleanup) (DestReceiver *self);<BR> /* Private fields might appear beyond this point... */<BR>};</PRE></pre></html>
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