MDEV-26595: ASAN use-after-poison my_strnxfrm_simple_internal /...

MDEV-26595: ASAN use-after-poison my_strnxfrm_simple_internal / Histogram_json_hb::range_selectivity

Add testcase

mysql-test/main/statistics_json.result

@@ -7842,7 +7842,6 @@ b	a
 drop table t1;
 #
 # MDEV-26589: Assertion failure upon DECODE_HISTOGRAM with NULLs in first column
-# (Just the testcase)
 #
 CREATE TABLE t1 (a INT, b INT);
 INSERT INTO t1 VALUES (NULL,1), (NULL,2);
@@ -7870,6 +7869,7 @@ NULL
   ]
 }
 drop table t1;
+#
 # MDEV-26711: Values in JSON histograms are not properly quoted
 #
 create table t1 (a varchar(32));
@@ -7883,7 +7883,7 @@ select * from t1 where a = 'foo';
 a
 drop table t1;
 #
-# MDEV-26724 Endless loop in json_escape_to_string upon ... empty string 
+# MDEV-26724 Endless loop in json_escape_to_string upon ... empty string
 #
 CREATE TABLE t1 (f VARCHAR(8));
 INSERT INTO t1 VALUES ('a'),(''),('b');
@@ -7898,3 +7898,17 @@ a
 
 b
 drop table t1;
+#
+# ASAN use-after-poison my_strnxfrm_simple_internal / Histogram_json_hb::range_selectivity ...
+# (Just the testcase)
+#
+CREATE TABLE t1 (f CHAR(8));
+INSERT INTO t1 VALUES ('foo'),('bar');
+SET histogram_type = JSON_HB;
+ANALYZE TABLE t1 PERSISTENT FOR ALL;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	Engine-independent statistics collected
+test.t1	analyze	status	OK
+SELECT * FROM t1 WHERE f > 'qux';
+f
+DROP TABLE t1;

mysql-test/main/statistics_json.test

@@ -185,7 +185,6 @@ drop table t1;
 
 --echo #
 --echo # MDEV-26589: Assertion failure upon DECODE_HISTOGRAM with NULLs in first column
---echo # (Just the testcase)
 --echo #
 
 CREATE TABLE t1 (a INT, b INT);
@@ -194,8 +193,11 @@ SET histogram_type = JSON_HB;
 ANALYZE TABLE t1 PERSISTENT FOR ALL;
 SELECT DECODE_HISTOGRAM(hist_type, histogram) from mysql.column_stats;
 drop table t1;
+
+--echo #
 --echo # MDEV-26711: Values in JSON histograms are not properly quoted
 --echo #
+
 create table t1 (a varchar(32));
 insert into t1 values ('this is "quoted" text');
 set histogram_type= JSON_HB;
@@ -204,7 +206,7 @@ select * from t1 where a = 'foo';
 drop table t1;
 
 --echo #
---echo # MDEV-26724 Endless loop in json_escape_to_string upon ... empty string 
+--echo # MDEV-26724 Endless loop in json_escape_to_string upon ... empty string
 --echo #
 CREATE TABLE t1 (f VARCHAR(8));
 INSERT INTO t1 VALUES ('a'),(''),('b');
@@ -213,3 +215,17 @@ ANALYZE TABLE t PERSISTENT FOR ALL;
 select * from t1;
 drop table t1;
 
+--echo #
+--echo # ASAN use-after-poison my_strnxfrm_simple_internal / Histogram_json_hb::range_selectivity ...
+--echo # (Just the testcase)
+--echo #
+
+CREATE TABLE t1 (f CHAR(8));
+INSERT INTO t1 VALUES ('foo'),('bar');
+
+SET histogram_type = JSON_HB;
+ANALYZE TABLE t1 PERSISTENT FOR ALL;
+
+SELECT * FROM t1 WHERE f > 'qux';
+DROP TABLE t1;
+