diff --git a/mysql-test/r/func_time.result b/mysql-test/r/func_time.result
index 4dd8fb1531d..dd33a7aba5f 100644
--- a/mysql-test/r/func_time.result
+++ b/mysql-test/r/func_time.result
@@ -666,6 +666,8 @@ timestampadd(SQL_TSI_SECOND, 1, date)
 select timestampadd(SQL_TSI_FRAC_SECOND, 1, date) from t1;
 timestampadd(SQL_TSI_FRAC_SECOND, 1, date)
 2003-01-02 00:00:00.000001
+Warnings:
+Warning	1287	'FRAC_SECOND' is deprecated; use 'MICROSECOND' instead
 select timestampdiff(MONTH, '2001-02-01', '2001-05-01') as a;
 a
 3
@@ -699,6 +701,8 @@ a
 select timestampdiff(SQL_TSI_FRAC_SECOND, '2001-02-01 12:59:59.120000', '2001-05-01 12:58:58.119999') as a;
 a
 7689538999999
+Warnings:
+Warning	1287	'FRAC_SECOND' is deprecated; use 'MICROSECOND' instead
 select timestampdiff(SQL_TSI_DAY, '1986-02-01', '1986-03-01') as a1,
 timestampdiff(SQL_TSI_DAY, '1900-02-01', '1900-03-01') as a2,
 timestampdiff(SQL_TSI_DAY, '1996-02-01', '1996-03-01') as a3,
@@ -1069,6 +1073,7 @@ timestampdiff(SQL_TSI_FRAC_SECOND, '2001-02-01 12:59:59.120000', '2001-05-01 12:
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 Warnings:
+Warning	1287	'FRAC_SECOND' is deprecated; use 'MICROSECOND' instead
 Note	1003	select timestampdiff(WEEK,_latin1'2001-02-01',_latin1'2001-05-01') AS `a1`,timestampdiff(SECOND_FRAC,_latin1'2001-02-01 12:59:59.120000',_latin1'2001-05-01 12:58:58.119999') AS `a2`
 select time_format('100:00:00', '%H %k %h %I %l');
 time_format('100:00:00', '%H %k %h %I %l')
@@ -1261,6 +1266,24 @@ DATE_ADD(20071108,         INTERVAL 1 DAY)
 select LAST_DAY('2007-12-06 08:59:19.05') - INTERVAL 1 SECOND;
 LAST_DAY('2007-12-06 08:59:19.05') - INTERVAL 1 SECOND
 2007-12-30 23:59:59
+SELECT TIMESTAMPADD(FRAC_SECOND, 1, '2008-02-18');
+TIMESTAMPADD(FRAC_SECOND, 1, '2008-02-18')
+2008-02-18 00:00:00.000001
+Warnings:
+Warning	1287	'FRAC_SECOND' is deprecated; use 'MICROSECOND' instead
+SELECT TIMESTAMPDIFF(FRAC_SECOND, '2008-02-17', '2008-02-18');
+TIMESTAMPDIFF(FRAC_SECOND, '2008-02-17', '2008-02-18')
+86400000000
+Warnings:
+Warning	1287	'FRAC_SECOND' is deprecated; use 'MICROSECOND' instead
+SELECT DATE_ADD('2008-02-18', INTERVAL 1 FRAC_SECOND);
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FRAC_SECOND)' at line 1
+SELECT DATE_SUB('2008-02-18', INTERVAL 1 FRAC_SECOND);
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FRAC_SECOND)' at line 1
+SELECT '2008-02-18' + INTERVAL 1 FRAC_SECOND;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FRAC_SECOND' at line 1
+SELECT '2008-02-18' - INTERVAL 1 FRAC_SECOND;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FRAC_SECOND' at line 1
 End of 5.0 tests
 select date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND);
 date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND)
diff --git a/mysql-test/t/func_time.test b/mysql-test/t/func_time.test
index 13c5da1285a..82a20cf429f 100644
--- a/mysql-test/t/func_time.test
+++ b/mysql-test/t/func_time.test
@@ -783,6 +783,25 @@ select DATE_ADD(20071108,         INTERVAL 1 DAY);
 
 select LAST_DAY('2007-12-06 08:59:19.05') - INTERVAL 1 SECOND;
 
+#
+# Bug#33834: FRAC_SECOND: Applicability not clear in documentation
+#
+# Show that he use of FRAC_SECOND, for anything other than
+# TIMESTAMPADD / TIMESTAMPDIFF, is a server error.
+
+SELECT TIMESTAMPADD(FRAC_SECOND, 1, '2008-02-18');
+SELECT TIMESTAMPDIFF(FRAC_SECOND, '2008-02-17', '2008-02-18');
+
+--error ER_PARSE_ERROR
+SELECT DATE_ADD('2008-02-18', INTERVAL 1 FRAC_SECOND);
+--error ER_PARSE_ERROR
+SELECT DATE_SUB('2008-02-18', INTERVAL 1 FRAC_SECOND);
+
+--error ER_PARSE_ERROR
+SELECT '2008-02-18' + INTERVAL 1 FRAC_SECOND;
+--error ER_PARSE_ERROR
+SELECT '2008-02-18' - INTERVAL 1 FRAC_SECOND;
+
 --echo End of 5.0 tests
 
 #
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index 6d2e4ea9a59..732dd4fe8dd 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -508,10 +508,10 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 
 %pure_parser                                    /* We have threads */
 /*
-  Currently there are 177 shift/reduce conflicts.
+  Currently there are 172 shift/reduce conflicts.
   We should not introduce new conflicts any more.
 */
-%expect 177
+%expect 172
 
 /*
    Comments for TOKENS.
@@ -1201,6 +1201,8 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
 
 %type <interval_time_st> interval_time_st
 
+%type <interval_time_st> interval_time_stamp
+
 %type <db_type> storage_engines known_storage_engines
 
 %type <row_type> row_types
@@ -6900,9 +6902,9 @@ function_call_nonkeyword:
               $$= new (YYTHD->mem_root) Item_func_now_local($3);
             Lex->safe_to_cache_query=0;
           }
-        | TIMESTAMP_ADD '(' interval_time_st ',' expr ',' expr ')'
+        | TIMESTAMP_ADD '(' interval_time_stamp ',' expr ',' expr ')'
           { $$= new (YYTHD->mem_root) Item_date_add_interval($7,$5,$3,0); }
-        | TIMESTAMP_DIFF '(' interval_time_st ',' expr ',' expr ')'
+        | TIMESTAMP_DIFF '(' interval_time_stamp ',' expr ',' expr ')'
           { $$= new (YYTHD->mem_root) Item_func_timestamp_diff($5,$7,$3); }
         | UTC_DATE_SYM optional_braces
           {
@@ -7874,22 +7876,41 @@ interval:
         | HOUR_MICROSECOND_SYM   { $$=INTERVAL_HOUR_MICROSECOND; }
         | HOUR_MINUTE_SYM        { $$=INTERVAL_HOUR_MINUTE; }
         | HOUR_SECOND_SYM        { $$=INTERVAL_HOUR_SECOND; }
-        | MICROSECOND_SYM        { $$=INTERVAL_MICROSECOND; }
         | MINUTE_MICROSECOND_SYM { $$=INTERVAL_MINUTE_MICROSECOND; }
         | MINUTE_SECOND_SYM      { $$=INTERVAL_MINUTE_SECOND; }
         | SECOND_MICROSECOND_SYM { $$=INTERVAL_SECOND_MICROSECOND; }
         | YEAR_MONTH_SYM         { $$=INTERVAL_YEAR_MONTH; }
         ;
 
+interval_time_stamp:
+	interval_time_st	{}
+	| FRAC_SECOND_SYM	{ 
+                                  $$=INTERVAL_MICROSECOND; 
+                                  /*
+                                    FRAC_SECOND was mistakenly implemented with
+                                    a wrong resolution. According to the ODBC
+                                    standard it should be nanoseconds, not
+                                    microseconds. Changing it to nanoseconds
+                                    in MySQL would mean making TIMESTAMPDIFF
+                                    and TIMESTAMPADD to return DECIMAL, since
+                                    the return value would be too big for BIGINT
+                                    Hence we just deprecate the incorrect
+                                    implementation without changing its
+                                    resolution.
+                                  */
+                                  WARN_DEPRECATED(yythd, "6.2", "FRAC_SECOND", "MICROSECOND");
+                                }
+	;
+
 interval_time_st:
           DAY_SYM         { $$=INTERVAL_DAY; }
         | WEEK_SYM        { $$=INTERVAL_WEEK; }
         | HOUR_SYM        { $$=INTERVAL_HOUR; }
-        | FRAC_SECOND_SYM { $$=INTERVAL_MICROSECOND; }
         | MINUTE_SYM      { $$=INTERVAL_MINUTE; }
         | MONTH_SYM       { $$=INTERVAL_MONTH; }
         | QUARTER_SYM     { $$=INTERVAL_QUARTER; }
         | SECOND_SYM      { $$=INTERVAL_SECOND; }
+        | MICROSECOND_SYM { $$=INTERVAL_MICROSECOND; }
         | YEAR_SYM        { $$=INTERVAL_YEAR; }
         ;