<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,
TupleDesctypeinfo 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 /> /*
Privatefields might appear beyond this point... */<br />};</pre></pre> ========================== 263电子邮件－信赖邮自专业