diff options
Diffstat (limited to 'src/include/nodes/nodes.h')
| -rw-r--r-- | src/include/nodes/nodes.h | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h index 94641eff08..e66d6c4dfb 100644 --- a/src/include/nodes/nodes.h +++ b/src/include/nodes/nodes.h @@ -6,7 +6,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: nodes.h,v 1.59 1999/12/16 17:24:19 momjian Exp $ + * $Id: nodes.h,v 1.60 2000/01/09 00:26:42 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -82,6 +82,7 @@ typedef enum NodeTag T_JoinInfo, T_Stream, T_TidPath, + T_IndexOptInfo, /*--------------------- * TAGS FOR EXECUTOR NODES (execnodes.h) @@ -286,12 +287,17 @@ extern void *copyObject(void *obj); extern bool equal(void *a, void *b); -/* ---------------- - * I don't know why this is here. Most likely a hack.. - * -cim 6/3/90 - * ---------------- +/* + * Typedefs for identifying qualifier selectivities and plan costs as such. + * These are just plain "double"s, but declaring a variable as Selectivity + * or Cost makes the intent more obvious. + * + * These could have gone into plannodes.h or some such, but many files + * depend on them... */ -typedef float Cost; +typedef double Selectivity; /* fraction of tuples a qualifier will pass */ +typedef double Cost; /* execution cost (in page-access units) */ + /* * CmdType - |