increase max field name

Signed-off-by: Weijun-H <huangweijun1001@gmail.com>

mysql-test/main/period_name.result

+#
+# MDEV-29387: Period name with more than 32 symbols crashes the server
+#
+# test 34 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890` (s,e));
+drop table t2;
+# test 64 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890123456789012345678901234567890` (s,e));
+drop table t2;

mysql-test/main/period_name.test

+--echo #
+--echo # MDEV-29387: Period name with more than 32 symbols crashes the server
+--echo #
+
+--echo # test 34 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890` (s,e)); 
+drop table t2;
+
+--echo # test 64 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890123456789012345678901234567890` (s,e)); 
+drop table t2;

mysql-test/suite/period/r/create.result

@@ -100,3 +100,11 @@ show status like "Feature_application_time_periods";
 Variable_name	Value
 Feature_application_time_periods	6
 drop table t;
+# MDEV-29387: Period name with more than 32 symbols crashes the server
+#
+# test 34 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890` (s,e));
+drop table t2;
+# test 64 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890123456789012345678901234567890` (s,e));
+drop table t2;

mysql-test/suite/period/t/create.test

@@ -85,3 +85,14 @@ insert t values (2, '2001-01-01', '2001-01-01');
 show status like "Feature_application_time_periods";
 
 drop table t;
+
+--echo # MDEV-29387: Period name with more than 32 symbols crashes the server
+--echo #
+
+--echo # test 34 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890` (s,e)); 
+drop table t2;
+
+--echo # test 64 symbols
+create table t2 (s date, e date, period for `abcd123456789012345678901234567890123456789012345678901234567890` (s,e)); 
+drop table t2;
\ No newline at end of file

sql/sql_const.h

@@ -29,7 +29,7 @@
 /* extra 4+4 bytes for slave tmp tables */
 #define MAX_DBKEY_LENGTH (NAME_LEN*2+1+1+4+4)
 #define MAX_ALIAS_NAME 256
-#define MAX_FIELD_NAME 34			/* Max colum name length +2 */
+#define MAX_FIELD_NAME (NAME_LEN+1)			/* Max colum name length +2 */
 #define MAX_SYS_VAR_LENGTH 32
 #define MAX_KEY MAX_INDEXES                     /* Max used keys */
 #define MAX_REF_PARTS 32			/* Max parts used as ref */