I also think that we could have better conventional regression test
coverage here.
I tried to minimize Michael's test case and add it to patch.
--
Teodor Sigaev E-mail: teo...@sigaev.ru
WWW: http://www.sigaev.ru/
diff --git a/src/backend/access/nbtree/nbtpage.c b/src/backend/access/nbtree/nbtpage.c
index beef089ba8..e6fe4ba90e 100644
--- a/src/backend/access/nbtree/nbtpage.c
+++ b/src/backend/access/nbtree/nbtpage.c
@@ -1714,7 +1714,7 @@ _bt_unlink_halfdead_page(Relation rel, Buffer leafbuf, bool *rightsib_empty)
* parent in the branch. Set 'target' and 'buf' to reference the page
* actually being unlinked.
*/
- if (ItemPointerIsValid(leafhikey))
+ if (ItemPointerGetBlockNumberNoCheck(leafhikey) != InvalidBlockNumber)
{
target = ItemPointerGetBlockNumberNoCheck(leafhikey);
Assert(target != leafblkno);
diff --git a/src/test/regress/expected/create_index.out b/src/test/regress/expected/create_index.out
index fe5b698669..fc81088d4b 100644
--- a/src/test/regress/expected/create_index.out
+++ b/src/test/regress/expected/create_index.out
@@ -3052,6 +3052,16 @@ explain (costs off)
Filter: (NOT b)
(4 rows)
+--
+-- Test for multilevel page deletion
+--
+CREATE TABLE delete_test_table (a bigint, b bigint, c bigint, d bigint);
+INSERT INTO delete_test_table SELECT i, 1, 2, 3 FROM generate_series(1,80000) i;
+ALTER TABLE delete_test_table ADD PRIMARY KEY (a,b,c,d);
+DELETE FROM delete_test_table WHERE a > 40000;
+VACUUM delete_test_table;
+DELETE FROM delete_test_table WHERE a > 10;
+VACUUM delete_test_table;
--
-- REINDEX (VERBOSE)
--
diff --git a/src/test/regress/expected/sanity_check.out b/src/test/regress/expected/sanity_check.out
index 8afb1f2f7e..0aa5357917 100644
--- a/src/test/regress/expected/sanity_check.out
+++ b/src/test/regress/expected/sanity_check.out
@@ -38,6 +38,7 @@ d_star|f
date_tbl|f
default_tbl|f
defaultexpr_tbl|f
+delete_test_table|t
dept|f
dupindexcols|t
e_star|f
diff --git a/src/test/regress/sql/create_index.sql b/src/test/regress/sql/create_index.sql
index f7731265a0..f9e7118f0d 100644
--- a/src/test/regress/sql/create_index.sql
+++ b/src/test/regress/sql/create_index.sql
@@ -1061,6 +1061,17 @@ explain (costs off)
explain (costs off)
select * from boolindex where not b order by i limit 10;
+--
+-- Test for multilevel page deletion
+--
+CREATE TABLE delete_test_table (a bigint, b bigint, c bigint, d bigint);
+INSERT INTO delete_test_table SELECT i, 1, 2, 3 FROM generate_series(1,80000) i;
+ALTER TABLE delete_test_table ADD PRIMARY KEY (a,b,c,d);
+DELETE FROM delete_test_table WHERE a > 40000;
+VACUUM delete_test_table;
+DELETE FROM delete_test_table WHERE a > 10;
+VACUUM delete_test_table;
+
--
-- REINDEX (VERBOSE)
--
