MDEV-16101: ADD PARTITION on table partitioned by list does not work with more than 32 list values.

This problem occured because the reorganization of the list of values when the
number of elements exceeds 32 was not handled correctly.  I have fixed the
problem by fixing the way that the list values are reorganized when the number
of list values exceeds 32.

Author:
  Jacob Mathew.

Reviewer:
  Alexey Botchkov.

mysql-test/main/partition_list.result

@@ -334,3 +334,213 @@ f
 1
 drop table t1;
 #end of 10.2 tests
+#
+# Bug MDEV-16101: More than MAX_REF_PARTS values in a list on ALTER TABLE.
+#                 Currently MAX_REF_PARTS = 32.
+CREATE TABLE ts1 (a INT, PRIMARY KEY (`a`))
+PARTITION BY LIST (`a`)
+(PARTITION `p ts_0` VALUES IN (101,102,103,104,105,106,107,108,109,110,
+111,112,113,114,115,116,117,118,119,120,
+121,122,123,124,125,126,127,128,129,130,
+131,132,133));
+INSERT INTO ts1
+VALUES (101), (102), (103), (104), (105), (106), (107), (108), (109), (110),
+(111), (112), (113), (114), (115), (116), (117), (118), (119), (120),
+(121), (122), (123), (124), (125), (126), (127), (128), (129), (130),
+(131), (132), (133);
+INSERT INTO ts1 VALUES (134);
+ERROR HY000: Table has no partition for value 134
+SELECT * FROM ts1;
+a
+101
+102
+103
+104
+105
+106
+107
+108
+109
+110
+111
+112
+113
+114
+115
+116
+117
+118
+119
+120
+121
+122
+123
+124
+125
+126
+127
+128
+129
+130
+131
+132
+133
+ALTER TABLE ts1 ADD PARTITION
+(PARTITION `p ts_1` VALUES IN (1,2,3,4,5,6,7,8,9,10,
+11,12,13,14,15,16,17,18,19,20,
+21,22,23,24,25,26,27,28,29,30,
+31,32,33));
+INSERT INTO ts1
+VALUES (1),  (2),  (3),  (4),  (5),  (6),  (7),  (8),  (9),  (10),
+(11), (12), (13), (14), (15), (16), (17), (18), (19), (20),
+(21), (22), (23), (24), (25), (26), (27), (28), (29), (30),
+(31), (32), (33);
+INSERT INTO ts1 VALUES(34);
+ERROR HY000: Table has no partition for value 34
+SELECT * FROM ts1;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+101
+102
+103
+104
+105
+106
+107
+108
+109
+110
+111
+112
+113
+114
+115
+116
+117
+118
+119
+120
+121
+122
+123
+124
+125
+126
+127
+128
+129
+130
+131
+132
+133
+ALTER TABLE ts1 REORGANIZE PARTITION `p ts_1` INTO
+(PARTITION `p ts_1` VALUES IN (1,2,3,4,5,6,7,8,9,10,
+11,12,13,14,15,16,17,18,19,20,
+21,22,23,24,25,26,27,28,29,30,
+31,32,33,34,35));
+INSERT INTO ts1 VALUES (34), (35);
+INSERT INTO ts1 VALUES (36);
+ERROR HY000: Table has no partition for value 36
+SELECT * FROM ts1;
+a
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+20
+21
+22
+23
+24
+25
+26
+27
+28
+29
+30
+31
+32
+33
+34
+35
+101
+102
+103
+104
+105
+106
+107
+108
+109
+110
+111
+112
+113
+114
+115
+116
+117
+118
+119
+120
+121
+122
+123
+124
+125
+126
+127
+128
+129
+130
+131
+132
+133
+DROP TABLE ts1;

mysql-test/main/partition_list.test

@@ -209,3 +209,44 @@ select * from t1 where f = 1;
 drop table t1;
 
 --echo #end of 10.2 tests
+
+--echo #
+--echo # Bug MDEV-16101: More than MAX_REF_PARTS values in a list on ALTER TABLE.
+--echo #                 Currently MAX_REF_PARTS = 32.
+CREATE TABLE ts1 (a INT, PRIMARY KEY (`a`))
+PARTITION BY LIST (`a`)
+(PARTITION `p ts_0` VALUES IN (101,102,103,104,105,106,107,108,109,110,
+                               111,112,113,114,115,116,117,118,119,120,
+                               121,122,123,124,125,126,127,128,129,130,
+                               131,132,133));
+INSERT INTO ts1
+VALUES (101), (102), (103), (104), (105), (106), (107), (108), (109), (110),
+       (111), (112), (113), (114), (115), (116), (117), (118), (119), (120),
+       (121), (122), (123), (124), (125), (126), (127), (128), (129), (130),
+       (131), (132), (133);
+--error ER_NO_PARTITION_FOR_GIVEN_VALUE
+INSERT INTO ts1 VALUES (134);
+SELECT * FROM ts1;
+ALTER TABLE ts1 ADD PARTITION
+(PARTITION `p ts_1` VALUES IN (1,2,3,4,5,6,7,8,9,10,
+                               11,12,13,14,15,16,17,18,19,20,
+                               21,22,23,24,25,26,27,28,29,30,
+                               31,32,33));
+INSERT INTO ts1
+VALUES (1),  (2),  (3),  (4),  (5),  (6),  (7),  (8),  (9),  (10),
+       (11), (12), (13), (14), (15), (16), (17), (18), (19), (20),
+       (21), (22), (23), (24), (25), (26), (27), (28), (29), (30),
+       (31), (32), (33);
+--error ER_NO_PARTITION_FOR_GIVEN_VALUE
+INSERT INTO ts1 VALUES(34);
+SELECT * FROM ts1;
+ALTER TABLE ts1 REORGANIZE PARTITION `p ts_1` INTO
+(PARTITION `p ts_1` VALUES IN (1,2,3,4,5,6,7,8,9,10,
+                               11,12,13,14,15,16,17,18,19,20,
+                               21,22,23,24,25,26,27,28,29,30,
+                               31,32,33,34,35));
+INSERT INTO ts1 VALUES (34), (35);
+--error ER_NO_PARTITION_FOR_GIVEN_VALUE
+INSERT INTO ts1 VALUES (36);
+SELECT * FROM ts1;
+DROP TABLE ts1;

sql/partition_info.cc

@@ -1800,9 +1800,11 @@ part_column_list_val *partition_info::add_column_value(THD *thd)
       into the structure used for 1 column. After this we call
       ourselves recursively which should always succeed.
     */
+    num_columns= curr_list_object;
     if (!reorganize_into_single_field_col_val(thd))
     {
-      DBUG_RETURN(add_column_value(thd));
+      if (!init_column_part(thd))
+        DBUG_RETURN(add_column_value(thd));
     }
     DBUG_RETURN(NULL);
   }