Add additional comments on JSON changes and remove unneeded schema ty…

…pe comparison

Co-authored-by: Shiv Nagarajan <shiv@shopify.com>

dml_events.go

@@ -423,6 +423,7 @@ func appendEscapedValue(buffer []byte, value interface{}, column schema.TableCol
 
 	switch v := value.(type) {
 	case string:
+		// since https://github.com/go-mysql-org/go-mysql/pull/658/files merged, go-mysql returns JSON events as a string, but we would prefer them as []byte for consistency with other types
 		if column.Type == schema.TYPE_JSON {
 			return appendEscapedBuffer(buffer, []byte(v), true)
 		}
@@ -435,7 +436,8 @@ func appendEscapedValue(buffer []byte, value interface{}, column schema.TableCol
 
 		return appendEscapedString(buffer, v, rightPadLengthForBinaryColumn)
 	case []byte:
-		return appendEscapedBuffer(buffer, v, column.Type == schema.TYPE_JSON)
+		// schema type cannot be JSON at this point because all JSON results are strings
+		return appendEscapedBuffer(buffer, v, false)
 	case bool:
 		if v {
 			return append(buffer, '1')