Bug#11589 mysqltest, --ps-protocol, strange output, float/double/real with zerofill

 - Add zerofill in client if real/float/double is bound to string and fetched using binary protocol.

libmysql/libmysql.c

@@ -3850,7 +3850,15 @@ static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
       sprintf(buff, "%.*f", (int) field->decimals, value);
       end= strend(buff);
     }
-    fetch_string_with_conversion(param, buff, (uint) (end - buff));
+    uint length= (uint) (end-buff);
+    if (field->flags & ZEROFILL_FLAG && length < field->length &&
+        field->length < MAX_DOUBLE_STRING_REP_LENGTH-1)
+    {
+      bmove_upp((char*) buff+field->length,buff+length, length);
+      bfill((char*) buff, field->length - length,'0');
+      length= field->length;
+    }
+    fetch_string_with_conversion(param, buff, length);
     break;
   }
   }

mysql-test/r/type_float.result

@@ -244,3 +244,19 @@ create table t1 (s1 float(0,2));
 ERROR 42000: For float(M,D), double(M,D) or decimal(M,D), M must be >= D (column 's1').
 create table t1 (s1 float(1,2));
 ERROR 42000: For float(M,D), double(M,D) or decimal(M,D), M must be >= D (column 's1').
+CREATE TABLE t1 (
+f1 real zerofill,
+f2 double zerofill,
+f3 float zerofill);
+INSERT INTO t1 VALUES ( 0.314152e+1, 0.314152e+1, 0.314152e+1);
+PREPARE stmt1 FROM 'select f1, f2, f3 FROM t1';
+select f1, f2, f3 FROM t1;
+f1	f2	f3
+0000000000000003.14152	0000000000000003.14152	000003.14152
+select f1, f2, f3 FROM t1;
+f1	f2	f3
+0000000000000003.14152	0000000000000003.14152	000003.14152
+EXECUTE stmt1;
+f1	f2	f3
+0000000000000003.14152	0000000000000003.14152	000003.14152
+DROP TABLE t1;

mysql-test/t/type_float.test

@@ -169,3 +169,21 @@ drop table t1, t2, t3;
 create table t1 (s1 float(0,2));
 --error 1427
 create table t1 (s1 float(1,2));
+
+#
+# MySQL Bugs: #11589: mysqltest --ps-protocol, strange output, float/double/real with zerofill
+#
+
+CREATE TABLE t1 (
+  f1 real zerofill,
+  f2 double zerofill,
+  f3 float zerofill);
+INSERT INTO t1 VALUES ( 0.314152e+1, 0.314152e+1, 0.314152e+1);
+
+let $my_stmt= select f1, f2, f3 FROM t1;
+eval PREPARE stmt1 FROM '$my_stmt';
+select f1, f2, f3 FROM t1;
+eval $my_stmt;
+EXECUTE stmt1;
+
+DROP TABLE t1;