Additional fix for bug #14445 (analyse.test fails)

mysql-test/r/analyse.result:
  test result fixed
mysql-test/t/disabled.def:
  user_var disabled
sql/sql_analyse.cc:
  rounding added

mysql-test/r/analyse.result

@@ -107,7 +107,7 @@ insert into t1 values(1.1);
 insert into t1 values(2.2);
 select * from t1 procedure analyse();
 Field_name	Min_value	Max_value	Min_length	Max_length	Empties_or_zeros	Nulls	Avg_value_or_avg_length	Std	Optimal_fieldtype
-test.t1.df	1.1	2.2	8	8	0	0	1.650000000	0.55000	ENUM('1.1','2.2') NOT NULL
+test.t1.df	1.1	2.2	13	13	0	0	1.65000	0.55000	ENUM('1.1','2.2') NOT NULL
 drop table t1;
 create table t1 (d double);
 insert into t1 values (100000);
@@ -138,6 +138,6 @@ insert into t2 values (1, 'USA'),(2,'India'), (3,'Finland');
 select product, sum(profit),avg(profit) from t1 group by product with rollup procedure analyse();
 Field_name	Min_value	Max_value	Min_length	Max_length	Empties_or_zeros	Nulls	Avg_value_or_avg_length	Std	Optimal_fieldtype
 test.t1.product	Computer	TV	2	8	0	0	4.2500	NULL	ENUM('Computer','Phone','TV') NOT NULL
-sum(profit)	10	6900	11	11	0	0	1946	2867.6719	ENUM('10','275','600','6900') NOT NULL
-avg(profit)	10.000000000	1380.000000000	21	21	0	0	394.687500000	570.20033144	ENUM('10.0000','68.7500','120.0000','1380.0000') NOT NULL
+sum(profit)	10	6900	11	11	0	0	1946.2500	2867.6719	ENUM('10','275','600','6900') NOT NULL
+avg(profit)	10.0000	1380.0000	16	16	0	0	394.68750000	570.20033144	ENUM('10.0000','68.7500','120.0000','1380.0000') NOT NULL
 drop table t1,t2;

mysql-test/t/disabled.def

@@ -16,3 +16,4 @@ rpl_until       : Unstable test case, bug#12429
 rpl_deadlock    : Unstable test case, bug#12429
 kill            : Unstable test case, bug#9712
 archive_gis     : The test fails on 32bit Linux
+user_var        : Ramil should fix this soon

sql/sql_analyse.cc

@@ -466,7 +466,9 @@ void field_real::add()
 
 void field_decimal::add()
 {
+  /*TODO - remove rounding stuff after decimal_div returns proper frac */
   my_decimal dec_buf, *dec= item->val_decimal(&dec_buf);
+  my_decimal rounded;
   uint length;
   TREE_ELEMENT *element;
 
@@ -476,6 +478,9 @@ void field_decimal::add()
     return;
   }
 
+  my_decimal_round(E_DEC_FATAL_ERROR, dec, item->decimals, FALSE,&rounded);
+  dec= &rounded;
+
   length= my_decimal_string_length(dec);
 
   if (decimal_is_zero(dec))
@@ -1021,10 +1026,16 @@ String *field_decimal::avg(String *s, ha_rows rows)
     s->set((double) 0.0, 1,my_thd_charset);
     return s;
   }
-  my_decimal num, avg_val;
+  my_decimal num, avg_val, rounded_avg;
+  int prec_increment= current_thd->variables.div_precincrement;
+
   int2my_decimal(E_DEC_FATAL_ERROR, rows - nulls, FALSE, &num);
-  my_decimal_div(E_DEC_FATAL_ERROR, &avg_val, sum+cur_sum, &num, 0);
-  my_decimal2string(E_DEC_FATAL_ERROR, &avg_val, 0, 0, '0', s);
+  my_decimal_div(E_DEC_FATAL_ERROR, &avg_val, sum+cur_sum, &num, prec_increment);
+  /* TODO remove this after decimal_div returns proper frac */
+  my_decimal_round(E_DEC_FATAL_ERROR, &avg_val,
+                   min(sum[cur_sum].frac + prec_increment, DECIMAL_MAX_SCALE),
+                   FALSE,&rounded_avg);
+  my_decimal2string(E_DEC_FATAL_ERROR, &rounded_avg, 0, 0, '0', s);
   return s;
 }