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Diffstat (limited to 'src/backend/nodes/README')
| -rw-r--r-- | src/backend/nodes/README | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/src/backend/nodes/README b/src/backend/nodes/README index 499aefbe977..b1b95ffcdee 100644 --- a/src/backend/nodes/README +++ b/src/backend/nodes/README @@ -1,15 +1,12 @@ -******************************************************************************* -* * -* EXPLANATION OF THE NODE STRUCTURES * -* - Andrew Yu (11/94) * -* * -* Copyright (c) 1994, Regents of the University of California * -* * -* $PostgreSQL: pgsql/src/backend/nodes/README,v 1.2 2003/11/29 22:39:45 pgsql Exp $ -* * -******************************************************************************* - -INTRODUCTION +$PostgreSQL: pgsql/src/backend/nodes/README,v 1.3 2008/03/20 17:55:14 momjian Exp $ + +Node Structures +=============== + +Andrew Yu (11/94) + +Introduction +------------ The current node structures are plain old C structures. "Inheritance" is achieved by convention. No additional functions will be generated. Functions @@ -36,7 +33,8 @@ FILES IN THIS DIRECTORY memnodes.h - memory nodes -STEPS TO ADD A NODE +Steps to Add a Node +------------------- Suppose you wana define a node Foo: @@ -51,7 +49,8 @@ Suppose you wana define a node Foo: bother writing a creator function in makefuncs.c) -HISTORICAL NOTE +Historical Note +--------------- Prior to the current simple C structure definitions, the Node structures uses a pseudo-inheritance system which automatically generates creator and |