Fixed Bug#10716, Procedure Analyse results in wrong values for optimal field type

Added test case.

mysql-test/r/analyse.result

@@ -102,3 +102,9 @@ 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.v	"	\\	1	19	0	0	3.7619	NULL	ENUM('"','""','"c','\'\0\\"','\'','\'\'','\'b','a\0\0\0b','a\0','a""""b','a\'\'\'\'b','abc','abc\'def\\hij"klm\0opq','a\\\\\\\\b','b\'','c"','d\\','The\ZEnd','\\','\\d','\\\\') NOT NULL
 drop table t1;
+create table t1 (d double);
+insert into t1 values (100000);
+select * from t1 procedure analyse (1,1);
+Field_name	Min_value	Max_value	Min_length	Max_length	Empties_or_zeros	Nulls	Avg_value_or_avg_length	Std	Optimal_fieldtype
+test.t1.d	100000	100000	6	6	0	0	100000	0	MEDIUMINT(6) UNSIGNED NOT NULL
+drop table t1;

mysql-test/t/analyse.test

@@ -48,4 +48,13 @@ insert into t1 values ('abc'),('abc\'def\\hij\"klm\0opq'),('\''),('\"'),('\\'),(
 select * from t1 procedure analyse();
 drop table t1;
 
+#
+# Bug#10716 - Procedure Analyse results in wrong values for optimal field type
+#
+
+create table t1 (d double);
+insert into t1 values (100000);
+select * from t1 procedure analyse (1,1);
+drop table t1;
+
 # End of 4.1 tests

sql/sql_analyse.cc

@@ -789,18 +789,23 @@ void field_real::get_opt_type(String *answer,
   if (!max_notzero_dec_len)
   {
     if (min_arg >= -128 && max_arg <= (min_arg >= 0 ? 255 : 127))
-      sprintf(buff, "TINYINT(%d)", (int) max_length - (item->decimals + 1));
+      sprintf(buff, "TINYINT(%d)", (int) max_length -
+	      ((item->decimals == NOT_FIXED_DEC) ? 0 : (item->decimals + 1)));
     else if (min_arg >= INT_MIN16 && max_arg <= (min_arg >= 0 ?
 						 UINT_MAX16 : INT_MAX16))
-      sprintf(buff, "SMALLINT(%d)", (int) max_length - (item->decimals + 1));
+      sprintf(buff, "SMALLINT(%d)", (int) max_length -
+	      ((item->decimals == NOT_FIXED_DEC) ? 0 : (item->decimals + 1)));
     else if (min_arg >= INT_MIN24 && max_arg <= (min_arg >= 0 ?
 						 UINT_MAX24 : INT_MAX24))
-      sprintf(buff, "MEDIUMINT(%d)", (int) max_length - (item->decimals + 1));
+      sprintf(buff, "MEDIUMINT(%d)", (int) max_length -
+	      ((item->decimals == NOT_FIXED_DEC) ? 0 : (item->decimals + 1)));
     else if (min_arg >= INT_MIN32 && max_arg <= (min_arg >= 0 ?
 						 UINT_MAX32 : INT_MAX32))
-      sprintf(buff, "INT(%d)", (int) max_length - (item->decimals + 1));
+      sprintf(buff, "INT(%d)", (int) max_length -
+	      ((item->decimals == NOT_FIXED_DEC) ? 0 : (item->decimals + 1)));
     else
-      sprintf(buff, "BIGINT(%d)", (int) max_length - (item->decimals + 1));
+      sprintf(buff, "BIGINT(%d)", (int) max_length -
+	      ((item->decimals == NOT_FIXED_DEC) ? 0 : (item->decimals + 1)));
     answer->append(buff, (uint) strlen(buff));
     if (min_arg >= 0)
       answer->append(" UNSIGNED");