getattnvals(): if attnvals in pg_attribute is 0 then use

vadim4o · vadim4o · commit 2fd9273d97ce · 1997-04-09T02:20:32.000Z
ATTNVALS_SCALE/reltuples (instead of reltuples).
diff --git a/src/backend/utils/adt/selfuncs.c b/src/backend/utils/adt/selfuncs.c
@@ -12,7 +12,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.5 1997/02/07 16:23:39 momjian Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.6 1997/04/09 02:20:32 vadim Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -291,6 +291,15 @@ getattnvals(Oid relid, AttrNumber attnum)
 	return(0);
     }
     nvals = ((Form_pg_class) GETSTRUCT(atp))->reltuples;
+    /* Look above how nvals is used. 	- vadim 04/09/97 */
+    if ( nvals > 0 )
+    {
+    	double selratio = 1.0 / (double)nvals;
+    	
+    	selratio *= (double)ATTNVALS_SCALE;
+    	nvals = (int) ceil (selratio);
+    }
+    
     return(nvals);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -12,7 +12,7 @@`
`12`	`12`	`*`
`13`	`13`	`*`
`14`	`14`	`* IDENTIFICATION`
`15`		`- * $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.5 1997/02/07 16:23:39 momjian Exp $`
	`15`	`+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.6 1997/04/09 02:20:32 vadim Exp $`
`16`	`16`	`*`
`17`	`17`	`*-------------------------------------------------------------------------`
`18`	`18`	`*/`
`@@ -291,6 +291,15 @@ getattnvals(Oid relid, AttrNumber attnum)`
`291`	`291`	`return(0);`
`292`	`292`	`}`
`293`	`293`	`nvals = ((Form_pg_class) GETSTRUCT(atp))->reltuples;`
	`294`	`+ /* Look above how nvals is used. - vadim 04/09/97 */`
	`295`	`+ if ( nvals > 0 )`
	`296`	`+ {`
	`297`	`+ double selratio = 1.0 / (double)nvals;`
	`298`	`+`
	`299`	`+ selratio *= (double)ATTNVALS_SCALE;`
	`300`	`+ nvals = (int) ceil (selratio);`
	`301`	`+ }`
	`302`	`+`
`294`	`303`	`return(nvals);`
`295`	`304`	`}`
`296`	`305`