MDEV-25408 JSON_TABLE: AddressSanitizer CHECK failed in Binary_string::realloc_raw

We need to update default values if we change the column's charsets.

mysql-test/suite/json/r/json_table.result

@@ -813,6 +813,7 @@ SUM(o)
 NULL
 set sql_mode=@save_sql_mode;
 drop table t1;
+#
 # MDEV-25379 JSON_TABLE: ERROR ON clauses are ignored if a column is not on select list.
 #
 SELECT * FROM JSON_TABLE ('{}', '$' COLUMNS(a INT PATH '$.*' ERROR ON EMPTY, o FOR ORDINALITY)) AS jt;
@@ -822,5 +823,14 @@ ERROR HY000: Field 'a' can't be set for JSON_TABLE 'jt'.
 SELECT COUNT(*) FROM JSON_TABLE ('{}', '$' COLUMNS(a INT PATH '$.*' ERROR ON EMPTY, o FOR ORDINALITY)) AS jt;
 ERROR HY000: Field 'a' can't be set for JSON_TABLE 'jt'.
 #
+# MDEV-25408 JSON_TABLE: AddressSanitizer CHECK failed in Binary_string::realloc_raw.
+#
+SELECT x, COUNT(*) FROM JSON_TABLE( '{}', '$' COLUMNS(
+a BIT(14) PATH '$', b CHAR(16) PATH '$', c INT PATH '$[0]', d INT PATH '$[1]', e INT PATH '$[2]',
+f INT PATH '$[3]', g INT PATH '$[4]', h INT PATH '$[5]', i INT PATH '$[6]', j INT PATH '$[7]',
+x TEXT PATH '$[9]')) AS jt GROUP BY x;
+x	COUNT(*)
+NULL	1
+#
 # End of 10.6 tests
 #

mysql-test/suite/json/t/json_table.test

@@ -709,6 +709,7 @@ SELECT SUM(o) FROM t1 JOIN JSON_TABLE(t1.a, '$' COLUMNS(o FOR ORDINALITY)) jt;
 set sql_mode=@save_sql_mode;
 drop table t1;
 
+--echo #
 --echo # MDEV-25379 JSON_TABLE: ERROR ON clauses are ignored if a column is not on select list.
 --echo #
 --error ER_JSON_TABLE_ERROR_ON_FIELD
@@ -718,6 +719,15 @@ SELECT o FROM JSON_TABLE ('{}', '$' COLUMNS(a INT PATH '$.*' ERROR ON EMPTY, o F
 --error ER_JSON_TABLE_ERROR_ON_FIELD
 SELECT COUNT(*) FROM JSON_TABLE ('{}', '$' COLUMNS(a INT PATH '$.*' ERROR ON EMPTY, o FOR ORDINALITY)) AS jt;
 
+
+--echo #
+--echo # MDEV-25408 JSON_TABLE: AddressSanitizer CHECK failed in Binary_string::realloc_raw.
+--echo #
+SELECT x, COUNT(*) FROM JSON_TABLE( '{}', '$' COLUMNS(
+      a BIT(14) PATH '$', b CHAR(16) PATH '$', c INT PATH '$[0]', d INT PATH '$[1]', e INT PATH '$[2]',
+      f INT PATH '$[3]', g INT PATH '$[4]', h INT PATH '$[5]', i INT PATH '$[6]', j INT PATH '$[7]',
+      x TEXT PATH '$[9]')) AS jt GROUP BY x;
+
 --echo #
 --echo # End of 10.6 tests
 --echo #

sql/json_table.cc

@@ -1109,6 +1109,7 @@ int Table_function_json_table::setup(THD *thd, TABLE_LIST *sql_table,
       */
       jc->m_field->charset= jc->m_explicit_cs;
     }
+    store_record(t, s->default_values);
   }
   return FALSE;
 }