diff options
Diffstat (limited to 'src/include/nodes/params.h')
| -rw-r--r-- | src/include/nodes/params.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/include/nodes/params.h b/src/include/nodes/params.h index 13eb25876d..3a93d75f30 100644 --- a/src/include/nodes/params.h +++ b/src/include/nodes/params.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/nodes/params.h,v 1.31 2006/04/22 01:26:01 tgl Exp $ + * $PostgreSQL: pgsql/src/include/nodes/params.h,v 1.32 2006/09/06 20:40:48 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -26,15 +26,22 @@ * Although parameter numbers are normally consecutive, we allow * ptype == InvalidOid to signal an unused array entry. * + * PARAM_FLAG_CONST signals the planner that it may treat this parameter + * as a constant (i.e., generate a plan that works only for this value + * of the parameter). + * * Although the data structure is really an array, not a list, we keep * the old typedef name to avoid unnecessary code changes. * ---------------- */ +#define PARAM_FLAG_CONST 0x0001 /* parameter is constant */ + typedef struct ParamExternData { Datum value; /* parameter value */ bool isnull; /* is it NULL? */ + uint16 pflags; /* flag bits, see above */ Oid ptype; /* parameter's datatype, or 0 */ } ParamExternData; |