Fixing a bug in the recent commit that added trigger names into error messages

Trigger names were erroneously cut to 8 or 4 bytes (on 64 and 32 bit machines).
Recording correct tests results.

mysql-test/r/create_drop_trigger.result

@@ -10,7 +10,7 @@ SELECT @sum;
 CREATE TRIGGER IF NOT EXISTS val_sum_new BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val;
 CREATE TRIGGER IF NOT EXISTS val_sum AFTER INSERT ON t1 FOR EACH ROW SET @sum = @sum + 1 + NEW.val;
 Warnings:
-Note	1359	Trigger 'db1.val_' already exists
+Note	1359	Trigger 'db1.val_sum' already exists
 CREATE OR REPLACE TRIGGER IF NOT EXISTS val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + 2 + NEW.val;
 ERROR HY000: Incorrect usage of OR REPLACE and IF NOT EXISTS
 SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
@@ -21,7 +21,7 @@ SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val
 ACTION_STATEMENT
 SET @sum = @sum + 3 + NEW.val
 CREATE TRIGGER val_sum BEFORE INSERT ON t1 FOR EACH ROW SET @sum = @sum + 4 + NEW.val;
-ERROR HY000: Trigger 'db1.val_' already exists
+ERROR HY000: Trigger 'db1.val_sum' already exists
 SELECT ACTION_STATEMENT FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
 ACTION_STATEMENT
 SET @sum = @sum + 3 + NEW.val

mysql-test/r/trigger.result

@@ -1986,7 +1986,7 @@ drop table if exists t1;
 create table t1 (i int, j int);
 create trigger t1_bi before insert on t1 for each row begin end;
 create trigger t1_bi before insert on t1 for each row begin end;
-ERROR HY000: Trigger 'test.t1_' already exists
+ERROR HY000: Trigger 'test.t1_bi' already exists
 create trigger t1_bi2 before insert on t1 for each row begin end;
 drop trigger t1_bi;
 drop trigger t1_bi2;

mysql-test/suite/funcs_1/r/innodb_trig_0102.result

@@ -253,7 +253,7 @@ Testcase 3.5.1.10:
 ------------------
 CREATE TRIGGER trg7_1 BEFORE UPDATE on tb3 for each row set new.f120 ='X';
 CREATE TRIGGER trg7_1 AFTER INSERT on tb3 for each row set @x ='Y';
-ERROR HY000: Trigger 'test.trg' already exists
+ERROR HY000: Trigger 'test.trg7_1' already exists
 drop trigger trg7_1;
 
 Testcase 3.5.1.?:
@@ -266,7 +266,7 @@ create trigger trig before insert on t1
 for each row set new.f1 ='trig t1';
 create trigger trig before update on t2
 for each row set new.f1 ='trig t2';
-ERROR HY000: Trigger 'test.tri' already exists
+ERROR HY000: Trigger 'test.trig' already exists
 insert into t1 value ('insert to t1',1);
 select * from t1;
 f1	f2

mysql-test/suite/funcs_1/r/innodb_trig_0407.result

@@ -459,7 +459,7 @@ Create trigger trg_3_406010_2 AFTER DELETE
 on tb3 for each row set @test_var=@test_var+50;
 Create trigger trg_3_406010_1 AFTER INSERT
 on tb3 for each row set @test_var=@test_var+1;
-ERROR HY000: Trigger 'test.trg' already exists
+ERROR HY000: Trigger 'test.trg_3_406010_1' already exists
 select @test_var;
 @test_var
 1

mysql-test/suite/funcs_1/r/memory_trig_0102.result

@@ -254,7 +254,7 @@ Testcase 3.5.1.10:
 ------------------
 CREATE TRIGGER trg7_1 BEFORE UPDATE on tb3 for each row set new.f120 ='X';
 CREATE TRIGGER trg7_1 AFTER INSERT on tb3 for each row set @x ='Y';
-ERROR HY000: Trigger 'test.trg' already exists
+ERROR HY000: Trigger 'test.trg7_1' already exists
 drop trigger trg7_1;
 
 Testcase 3.5.1.?:
@@ -267,7 +267,7 @@ create trigger trig before insert on t1
 for each row set new.f1 ='trig t1';
 create trigger trig before update on t2
 for each row set new.f1 ='trig t2';
-ERROR HY000: Trigger 'test.tri' already exists
+ERROR HY000: Trigger 'test.trig' already exists
 insert into t1 value ('insert to t1',1);
 select * from t1;
 f1	f2

mysql-test/suite/funcs_1/r/memory_trig_0407.result

@@ -459,7 +459,7 @@ Create trigger trg_3_406010_2 AFTER DELETE
 on tb3 for each row set @test_var=@test_var+50;
 Create trigger trg_3_406010_1 AFTER INSERT
 on tb3 for each row set @test_var=@test_var+1;
-ERROR HY000: Trigger 'test.trg' already exists
+ERROR HY000: Trigger 'test.trg_3_406010_1' already exists
 select @test_var;
 @test_var
 1

mysql-test/suite/funcs_1/r/myisam_trig_0102.result

@@ -254,7 +254,7 @@ Testcase 3.5.1.10:
 ------------------
 CREATE TRIGGER trg7_1 BEFORE UPDATE on tb3 for each row set new.f120 ='X';
 CREATE TRIGGER trg7_1 AFTER INSERT on tb3 for each row set @x ='Y';
-ERROR HY000: Trigger 'test.trg' already exists
+ERROR HY000: Trigger 'test.trg7_1' already exists
 drop trigger trg7_1;
 
 Testcase 3.5.1.?:
@@ -267,7 +267,7 @@ create trigger trig before insert on t1
 for each row set new.f1 ='trig t1';
 create trigger trig before update on t2
 for each row set new.f1 ='trig t2';
-ERROR HY000: Trigger 'test.tri' already exists
+ERROR HY000: Trigger 'test.trig' already exists
 insert into t1 value ('insert to t1',1);
 select * from t1;
 f1	f2

mysql-test/suite/funcs_1/r/myisam_trig_0407.result

@@ -459,7 +459,7 @@ Create trigger trg_3_406010_2 AFTER DELETE
 on tb3 for each row set @test_var=@test_var+50;
 Create trigger trg_3_406010_1 AFTER INSERT
 on tb3 for each row set @test_var=@test_var+1;
-ERROR HY000: Trigger 'test.trg' already exists
+ERROR HY000: Trigger 'test.trg_3_406010_1' already exists
 select @test_var;
 @test_var
 1

mysql-test/suite/rpl/r/rpl_create_drop_trigger.result

@@ -19,7 +19,7 @@ SET @sum = @sum + NEW.val + 1
 connection master;
 CREATE TRIGGER IF NOT EXISTS val_sum AFTER INSERT ON t1 FOR EACH ROW SET @sum = @sum + NEW.val + 2;
 Warnings:
-Note	1359	Trigger 'db1.val_' already exists
+Note	1359	Trigger 'db1.val_sum' already exists
 SELECT ACTION_STATEMENT AS ACTION_STATEMENT_Master FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='val_sum';
 ACTION_STATEMENT_Master
 SET @sum = @sum + NEW.val + 1

sql/sql_trigger.cc

@@ -833,7 +833,7 @@ bool Table_triggers_list::create_trigger(THD *thd, TABLE_LIST *tables,
     }
     else if (lex->create_info.if_not_exists())
     {
-      strxnmov(trigname_buff, sizeof(trigname_buff-1), tables->db, ".",
+      strxnmov(trigname_buff, sizeof(trigname_buff) - 1, tables->db, ".",
                lex->spname->m_name.str, NullS);
       push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
                           ER_TRG_ALREADY_EXISTS,
@@ -852,7 +852,7 @@ bool Table_triggers_list::create_trigger(THD *thd, TABLE_LIST *tables,
     }
     else
     {
-      strxnmov(trigname_buff, sizeof(trigname_buff-1), tables->db, ".",
+      strxnmov(trigname_buff, sizeof(trigname_buff) - 1, tables->db, ".",
                lex->spname->m_name.str, NullS);
       my_error(ER_TRG_ALREADY_EXISTS, MYF(0), trigname_buff);
       DBUG_RETURN(true);