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Add comment about possible zero value.
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@ -6,7 +6,7 @@
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: primnodes.h,v 1.1 1996/08/28 01:57:46 scrappy Exp $
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* $Id: primnodes.h,v 1.2 1996/10/05 20:33:45 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -105,7 +105,7 @@ typedef struct Expr {
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* Var
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* varno - index of this var's relation in the range table
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* (could be INNER or OUTER)
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* varattno - attribute number of this var
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* varattno - attribute number of this var, or zero for all
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* vartype - pg_type tuple oid for the type of this var
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* varnoold - keep varno around in case it got changed to INNER/
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* OUTER (see match_varid)
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