Add support for generating binary data in blob/binary columns

.gitignore

@@ -1,3 +1,4 @@
 random_data_load*
 vendor/
 bin/*
+build/*

internal/getters/binary.go

@@ -0,0 +1,48 @@
+package getters
+
+import (
+	"fmt"
+	"math/rand"
+)
+
+// RandomString getter
+type RandomBinary struct {
+	name      string
+	maxSize   int64
+	allowNull bool
+}
+
+func (r *RandomBinary) Value() interface{} {
+	if r.allowNull && rand.Int63n(100) < nilFrequency {
+		return nil
+	}
+	maxSize := uint64(r.maxSize)
+	if maxSize == 0 {
+		maxSize = uint64(rand.Int63n(100))
+	}
+
+	data := make([]byte, maxSize)
+	rand.Read(data)
+
+	return data
+}
+
+func (r *RandomBinary) String() string {
+	v := r.Value()
+	if v == nil {
+		return NULL
+	}
+	return v.(string)
+}
+
+func (r *RandomBinary) Quote() string {
+	v := r.Value()
+	if v == nil {
+		return NULL
+	}
+	return fmt.Sprintf("%q", v)
+}
+
+func NewRandomBinary(name string, maxSize int64, allowNull bool) *RandomBinary {
+	return &RandomBinary{name, maxSize, allowNull}
+}

main.go

@@ -413,7 +413,7 @@ func makeValueFuncs(conn *sql.DB, fields []tableparser.Field) insertValues {
 			values = append(values, getters.NewRandomDate(field.ColumnName, field.IsNullable))
 		case "datetime", "timestamp":
 			values = append(values, getters.NewRandomDateTime(field.ColumnName, field.IsNullable))
-		case "tinyblob", "tinytext", "blob", "text", "mediumtext", "mediumblob", "longblob", "longtext":
+		case "tinytext", "text", "mediumtext", "longtext":
 			values = append(values, getters.NewRandomString(field.ColumnName,
 				field.CharacterMaximumLength.Int64, field.IsNullable))
 		case "time":
@@ -423,7 +423,7 @@ func makeValueFuncs(conn *sql.DB, fields []tableparser.Field) insertValues {
 				int64(time.Now().Year()), field.IsNullable))
 		case "enum", "set":
 			values = append(values, getters.NewRandomEnum(field.SetEnumVals, field.IsNullable))
-		case "binary", "varbinary":
+		case "binary", "varbinary", "tinyblob", "blob", "mediumblob", "longblob":
 			values = append(values, getters.NewRandomBinary(field.ColumnName, field.CharacterMaximumLength.Int64, field.IsNullable))
 		default:
 			log.Printf("cannot get field type: %s: %s\n", field.ColumnName, field.DataType)