/usr/include/postgres-xc/server/nodes/value.h is in postgres-xc-server-dev 1.1-2ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | /*-------------------------------------------------------------------------
*
* value.h
* interface for Value nodes
*
*
* Copyright (c) 2003-2012, PostgreSQL Global Development Group
*
* src/include/nodes/value.h
*
*-------------------------------------------------------------------------
*/
#ifndef VALUE_H
#define VALUE_H
#include "nodes/nodes.h"
/*----------------------
* Value node
*
* The same Value struct is used for five node types: T_Integer,
* T_Float, T_String, T_BitString, T_Null.
*
* Integral values are actually represented by a machine integer,
* but both floats and strings are represented as strings.
* Using T_Float as the node type simply indicates that
* the contents of the string look like a valid numeric literal.
*
* (Before Postgres 7.0, we used a double to represent T_Float,
* but that creates loss-of-precision problems when the value is
* ultimately destined to be converted to NUMERIC. Since Value nodes
* are only used in the parsing process, not for runtime data, it's
* better to use the more general representation.)
*
* Note that an integer-looking string will get lexed as T_Float if
* the value is too large to fit in a 'long'.
*
* Nulls, of course, don't need the value part at all.
*----------------------
*/
typedef struct Value
{
NodeTag type; /* tag appropriately (eg. T_String) */
union ValUnion
{
long ival; /* machine integer */
char *str; /* string */
} val;
} Value;
#define intVal(v) (((Value *)(v))->val.ival)
#define floatVal(v) atof(((Value *)(v))->val.str)
#define strVal(v) (((Value *)(v))->val.str)
extern Value *makeInteger(long i);
extern Value *makeFloat(char *numericStr);
extern Value *makeString(char *str);
extern Value *makeBitString(char *str);
#endif /* VALUE_H */
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