Minor changes from self review

Signed-off-by: Matt Lord <[email protected]>

go/mysql/binlog/binlog_json.go

@@ -113,6 +113,7 @@ func ParseBinaryJSONDiff(data []byte) (sqltypes.Value, error) {
 		} else { // Only the inner most function has the field name
 			diff.WriteString("%s, ") // This will later be replaced by the field name
 		}
+		outer = true
 
 		pathLen, readTo := readVariableLength(data, pos)
 		pos = readTo
@@ -125,27 +126,25 @@ func ParseBinaryJSONDiff(data []byte) (sqltypes.Value, error) {
 		diff.WriteByte('\'')
 		diff.Write(path)
 		diff.WriteByte('\'')
-
 		if opType == jsonDiffOpRemove { // No value for remove
 			diff.WriteByte(')')
-		} else {
-			diff.WriteString(", ")
-			valueLen, readTo := readVariableLength(data, pos)
-			pos = readTo
-			value, err := ParseBinaryJSON(data[pos : pos+valueLen])
-			if err != nil {
-				return sqltypes.Value{}, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT,
-					"cannot read JSON diff value for path %s: %v", path, err)
-			}
-			pos += valueLen
-			if value.Type() == json.TypeString {
-				diff.WriteString(sqlparser.Utf8mb4Str)
-			}
-			diff.Write(value.MarshalTo(nil))
-			diff.WriteByte(')')
+			continue
 		}
 
-		outer = true
+		diff.WriteString(", ")
+		valueLen, readTo := readVariableLength(data, pos)
+		pos = readTo
+		value, err := ParseBinaryJSON(data[pos : pos+valueLen])
+		if err != nil {
+			return sqltypes.Value{}, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT,
+				"cannot read JSON diff value for path %s: %v", path, err)
+		}
+		pos += valueLen
+		if value.Type() == json.TypeString {
+			diff.WriteString(sqlparser.Utf8mb4Str)
+		}
+		diff.Write(value.MarshalTo(nil))
+		diff.WriteByte(')')
 	}
 
 	return sqltypes.MakeTrusted(sqltypes.Expression, diff.Bytes()), nil

go/test/utils/binlog.go

@@ -88,10 +88,9 @@ func SetBinlogRowImageMode(mode string, cnfDir string, includePartialJSON bool)
 // variable is empty -- meaning we're not running in the CI and we assume
 // MySQL8.0 or later is used, and you can understand the failures and make
 // adjustments as necessary -- or it's set to reflect usage of MySQL 8.0 or
-// later. This relies on the current standard values used such as mysql5.7,
-// mysql8.0, mysql8.4, mariadb10.7, etc. This can be used when the CI test
-// behavior needs to be altered based on the specific database platform
-// we're testing against.
+// later. This relies on the current standard values used such as mysql57,
+// mysql80, mysql84, etc. This can be used when the CI test behavior needs
+// to be altered based on the specific database platform we're testing against.
 func CIDBPlatformIsMySQL8orLater() bool {
 	dbPlatform := strings.ToLower(os.Getenv("CI_DB_PLATFORM"))
 	if dbPlatform == "" {

go/vt/vttablet/tabletmanager/vreplication/replicator_plan.go

@@ -480,12 +480,10 @@ func (tp *TablePlan) applyChange(rowChange *binlogdatapb.RowChange, executor fun
 			jsonIndex := 0
 			for i, field := range tp.Fields {
 				if field.Type == querypb.Type_JSON && rowChange.JsonPartialValues != nil {
-					if !isBitSet(rowChange.JsonPartialValues.Cols, jsonIndex) {
+					switch {
+					case !isBitSet(rowChange.JsonPartialValues.Cols, jsonIndex):
 						// We use the full AFTER value which we already have.
-						jsonIndex++
-						continue
-					}
-					if len(afterVals[i].Raw()) == 0 {
+					case len(afterVals[i].Raw()) == 0:
 						// When using BOTH binlog_row_image=NOBLOB AND
 						// binlog_row_value_options=PARTIAL_JSON then the JSON column has the data bit
 						// set and the diff is empty when it's not present. So we want to use the
@@ -500,7 +498,7 @@ func (tp *TablePlan) applyChange(rowChange *binlogdatapb.RowChange, executor fun
 							return nil, vterrors.Wrapf(err, "failed to bind field value for %s.%s when building insert query",
 								tp.TargetName, field.Name)
 						}
-					} else {
+					default:
 						// For JSON columns when binlog-row-value-options=PARTIAL_JSON is used, we
 						// need to wrap the JSON diff function(s) around the BEFORE value.
 						diff := bindvars["a_"+field.Name].Value

go/vt/vttablet/tabletmanager/vreplication/vplayer_flaky_test.go

@@ -1519,14 +1519,15 @@ func TestPlayerRowMove(t *testing.T) {
 	validateQueryCountStat(t, "replicate", 3)
 }
 
-// TestPlayerPartialImagesUpdatePK tests the behavior of the vplayer when we
-// have partial binlog images, meaning that binlog-row-image=NOBLOB and
-// binlog-row-value-options=PARTIAL_JSON. These are both set when running the
-// unit tests with runNoBlobTest=true and runPartialJSONTest=true.
+// TestPlayerPartialImagesUpdatePK tests the behavior of the vplayer when
+// updating the Primary Key for a row when we have partial binlog
+// images, meaning that binlog-row-image=NOBLOB and
+// binlog-row-value-options=PARTIAL_JSON. These are both set when running
+// the unit tests with runNoBlobTest=true and runPartialJSONTest=true.
 // If the test is running in the CI and the database platform is not MySQL
-// 8.0 or later (which you can control using the CI_DB_PLATFORM env variable),
-// then runPartialJSONTest will be false and the test will be skipped.
-// the test if it's not set.
+// 8.0 or later (which you can control using the CI_DB_PLATFORM env
+// variable), then runPartialJSONTest will be false and the test will be
+// skipped.
 func TestPlayerPartialImagesUpdatePK(t *testing.T) {
 	if !runNoBlobTest {
 		t.Skip("Skipping test as binlog_row_image=NOBLOB is not set")
@@ -1586,15 +1587,26 @@ func TestPlayerPartialImagesUpdatePK(t *testing.T) {
 			},
 		},
 		{
-			input: `update src set id = id+10, bd = 'new blob data' where id = 2`,
+			input: `update src set bd = 'new blob data' where id = 2`,
+			output: []string{
+				"update dst set bd=_binary'new blob data' where id=2",
+			},
+			data: [][]string{
+				{"1", "{\"key1\": \"val1\", \"color\": \"red\"}", "blob data"},
+				{"2", "{\"key2\": \"val2\"}", "new blob data"},
+				{"3", "{\"key3\": \"val3\"}", "blob data3"},
+			},
+		},
+		{
+			input: `update src set id = id+10, bd = 'newest blob data' where id = 2`,
 			output: []string{
 				"delete from dst where id=2",
-				"insert into dst(id,jd,bd) values (12,JSON_OBJECT(_utf8mb4'key2', _utf8mb4'val2'),_binary'new blob data')",
+				"insert into dst(id,jd,bd) values (12,JSON_OBJECT(_utf8mb4'key2', _utf8mb4'val2'),_binary'newest blob data')",
 			},
 			data: [][]string{
 				{"1", "{\"key1\": \"val1\", \"color\": \"red\"}", "blob data"},
 				{"3", "{\"key3\": \"val3\"}", "blob data3"},
-				{"12", "{\"key2\": \"val2\"}", "new blob data"},
+				{"12", "{\"key2\": \"val2\"}", "newest blob data"},
 			},
 		},
 		{