Have to release meta page before reading root one!

vadim4o · vadim4o · commit 43c135e351b6 · 1999-06-07T14:28:22.000Z
&lt; 6.5 versions were just not affected by this bug due to locking.
diff --git a/src/backend/access/nbtree/nbtpage.c b/src/backend/access/nbtree/nbtpage.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.23 1999/05/25 22:04:12 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.24 1999/06/07 14:28:22 vadim Exp $
  *
  *	NOTES
  *	   Postgres btree pages look like ordinary relation pages.	The opaque
@@ -265,10 +265,10 @@ _bt_getroot(Relation rel, int access)
 	}
 	else
 	{
-		rootbuf = _bt_getbuf(rel, metad->btm_root, access);
+		rootblkno = metad->btm_root;
+		_bt_relbuf(rel, metabuf, BT_READ);	/* done with the meta page */
 
-		/* done with the meta page */
-		_bt_relbuf(rel, metabuf, BT_READ);
+		rootbuf = _bt_getbuf(rel, rootblkno, access);
 	}
 
 	/*

Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@`
`8`	`8`	`*`
`9`	`9`	`*`
`10`	`10`	`* IDENTIFICATION`
`11`		`- * $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.23 1999/05/25 22:04:12 momjian Exp $`
	`11`	`+ * $Header: /cvsroot/pgsql/src/backend/access/nbtree/nbtpage.c,v 1.24 1999/06/07 14:28:22 vadim Exp $`
`12`	`12`	`*`
`13`	`13`	`* NOTES`
`14`	`14`	`* Postgres btree pages look like ordinary relation pages. The opaque`
`@@ -265,10 +265,10 @@ _bt_getroot(Relation rel, int access)`
`265`	`265`	`}`
`266`	`266`	`else`
`267`	`267`	`{`
`268`		`- rootbuf = _bt_getbuf(rel, metad->btm_root, access);`
	`268`	`+ rootblkno = metad->btm_root;`
	`269`	`+ _bt_relbuf(rel, metabuf, BT_READ); /* done with the meta page */`
`269`	`270`
`270`		`- /* done with the meta page */`
`271`		`- _bt_relbuf(rel, metabuf, BT_READ);`
	`271`	`+ rootbuf = _bt_getbuf(rel, rootblkno, access);`
`272`	`272`	`}`
`273`	`273`
`274`	`274`	`/*`