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Added support to convert byte to string dynamically #4

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Merged
merged 1 commit into from
Feb 22, 2022
Merged

Added support to convert byte to string dynamically #4

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22 changes: 22 additions & 0 deletions replication/row_event.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1141,6 +1141,10 @@ func (e *RowsEvent) decodeValue(data []byte, tp byte, meta uint16) (v interface{
v, err = littleDecodeBit(data, nbits, n)
case MYSQL_TYPE_BLOB:
v, n, err = decodeBlob(data, meta)
newValue, ok := convertToString(v)
if ok {
v = newValue
}
case MYSQL_TYPE_VARCHAR,
MYSQL_TYPE_VAR_STRING:
length = int(meta)
Expand All @@ -1152,6 +1156,10 @@ func (e *RowsEvent) decodeValue(data []byte, tp byte, meta uint16) (v interface{
length = int(FixedLengthInt(data[0:meta]))
n = length + int(meta)
v, err = e.decodeJsonBinary(data[meta:n])
newValue, ok := convertToString(v)
if ok {
v = newValue
}
case MYSQL_TYPE_GEOMETRY:
// MySQL saves Geometry as Blob in binlog
// Seem that the binary format is SRID (4 bytes) + WKB, outer can use
Expand All @@ -1167,6 +1175,20 @@ func (e *RowsEvent) decodeValue(data []byte, tp byte, meta uint16) (v interface{
return v, n, err
}

// convertToString receive an interface and convert it to string if match the desired type
func convertToString(s interface{}) (string, bool) {
if s == nil {
return "", false
}
switch v := s.(type) {
case []uint8:
str := string(v)
return str, true
default:
return "", false
}
}

func decodeString(data []byte, length int) (v string, n int) {
if length < 256 {
length = int(data[0])
Expand Down