Character set recognition and manipulation

- Identifying textual characters sets; converting into specific type when applying dml events
- Refactored `ColumnsList`: introducing `Column` type
- Refactored `unsigned` handling, as part of `Column`
- `Column` type supports `convertArg()`: converting value of argument according to column data type
- DB URI attempts `utf8mb4,utf8,latin1` charsets in that order (first one to be recognized wins)
- Local tests filter by pattern
- Local tests append table schema on failure
- Local tests do not have postpone flag file
- Added character set local tests: `utf8`, `utf8mb4`, `latin1`

build.sh

@@ -2,7 +2,7 @@
 #
 #
 
-RELEASE_VERSION="1.0.17"
+RELEASE_VERSION="1.0.18"
 
 function build {
     osname=$1

go/logic/applier.go

@@ -301,7 +301,7 @@ func (this *Applier) ExecuteThrottleQuery() (int64, error) {
 // ReadMigrationMinValues returns the minimum values to be iterated on rowcopy
 func (this *Applier) ReadMigrationMinValues(uniqueKey *sql.UniqueKey) error {
 	log.Debugf("Reading migration range according to key: %s", uniqueKey.Name)
-	query, err := sql.BuildUniqueKeyMinValuesPreparedQuery(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, uniqueKey.Columns.Names)
+	query, err := sql.BuildUniqueKeyMinValuesPreparedQuery(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, uniqueKey.Columns.Names())
 	if err != nil {
 		return err
 	}
@@ -322,7 +322,7 @@ func (this *Applier) ReadMigrationMinValues(uniqueKey *sql.UniqueKey) error {
 // ReadMigrationMaxValues returns the maximum values to be iterated on rowcopy
 func (this *Applier) ReadMigrationMaxValues(uniqueKey *sql.UniqueKey) error {
 	log.Debugf("Reading migration range according to key: %s", uniqueKey.Name)
-	query, err := sql.BuildUniqueKeyMaxValuesPreparedQuery(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, uniqueKey.Columns.Names)
+	query, err := sql.BuildUniqueKeyMaxValuesPreparedQuery(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, uniqueKey.Columns.Names())
 	if err != nil {
 		return err
 	}
@@ -363,7 +363,7 @@ func (this *Applier) CalculateNextIterationRangeEndValues() (hasFurtherRange boo
 	query, explodedArgs, err := sql.BuildUniqueKeyRangeEndPreparedQuery(
 		this.migrationContext.DatabaseName,
 		this.migrationContext.OriginalTableName,
-		this.migrationContext.UniqueKey.Columns.Names,
+		this.migrationContext.UniqueKey.Columns.Names(),
 		this.migrationContext.MigrationIterationRangeMinValues.AbstractValues(),
 		this.migrationContext.MigrationRangeMaxValues.AbstractValues(),
 		atomic.LoadInt64(&this.migrationContext.ChunkSize),
@@ -402,10 +402,10 @@ func (this *Applier) ApplyIterationInsertQuery() (chunkSize int64, rowsAffected
 		this.migrationContext.DatabaseName,
 		this.migrationContext.OriginalTableName,
 		this.migrationContext.GetGhostTableName(),
-		this.migrationContext.SharedColumns.Names,
-		this.migrationContext.MappedSharedColumns.Names,
+		this.migrationContext.SharedColumns.Names(),
+		this.migrationContext.MappedSharedColumns.Names(),
 		this.migrationContext.UniqueKey.Name,
-		this.migrationContext.UniqueKey.Columns.Names,
+		this.migrationContext.UniqueKey.Columns.Names(),
 		this.migrationContext.MigrationIterationRangeMinValues.AbstractValues(),
 		this.migrationContext.MigrationIterationRangeMaxValues.AbstractValues(),
 		this.migrationContext.GetIteration() == 0,

go/logic/inspect.go

@@ -135,8 +135,8 @@ func (this *Inspector) InspectOriginalAndGhostTables() (err error) {
 	// This additional step looks at which columns are unsigned. We could have merged this within
 	// the `getTableColumns()` function, but it's a later patch and introduces some complexity; I feel
 	// comfortable in doing this as a separate step.
-	this.applyUnsignedColumns(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, this.migrationContext.OriginalTableColumns, this.migrationContext.SharedColumns)
-	this.applyUnsignedColumns(this.migrationContext.DatabaseName, this.migrationContext.GetGhostTableName(), this.migrationContext.GhostTableColumns, this.migrationContext.MappedSharedColumns)
+	this.applyColumnTypes(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, this.migrationContext.OriginalTableColumns, this.migrationContext.SharedColumns)
+	this.applyColumnTypes(this.migrationContext.DatabaseName, this.migrationContext.GetGhostTableName(), this.migrationContext.GhostTableColumns, this.migrationContext.MappedSharedColumns)
 
 	return nil
 }
@@ -477,23 +477,31 @@ func (this *Inspector) getTableColumns(databaseName, tableName string) (*sql.Col
 	return sql.NewColumnList(columnNames), nil
 }
 
-// applyUnsignedColumns
-func (this *Inspector) applyUnsignedColumns(databaseName, tableName string, columnsLists ...*sql.ColumnList) error {
-	query := fmt.Sprintf(`
-		show columns from %s.%s
-		`,
-		sql.EscapeName(databaseName),
-		sql.EscapeName(tableName),
-	)
-	err := sqlutils.QueryRowsMap(this.db, query, func(rowMap sqlutils.RowMap) error {
-		columnName := rowMap.GetString("Field")
-		if strings.Contains(rowMap.GetString("Type"), "unsigned") {
+// applyColumnTypes
+func (this *Inspector) applyColumnTypes(databaseName, tableName string, columnsLists ...*sql.ColumnList) error {
+	query := `
+		select
+				*
+			from
+				information_schema.columns
+			where
+				table_schema=?
+				and table_name=?
+		`
+	err := sqlutils.QueryRowsMap(this.db, query, func(m sqlutils.RowMap) error {
+		columnName := m.GetString("COLUMN_NAME")
+		if strings.Contains(m.GetString("COLUMN_TYPE"), "unsigned") {
 			for _, columnsList := range columnsLists {
 				columnsList.SetUnsigned(columnName)
 			}
 		}
+		if charset := m.GetString("CHARACTER_SET_NAME"); charset != "" {
+			for _, columnsList := range columnsLists {
+				columnsList.SetCharset(columnName, charset)
+			}
+		}
 		return nil
-	})
+	}, databaseName, tableName)
 	return err
 }
 
@@ -583,7 +591,7 @@ func (this *Inspector) getSharedUniqueKeys(originalUniqueKeys, ghostUniqueKeys [
 	// the ALTER is on the name itself...
 	for _, originalUniqueKey := range originalUniqueKeys {
 		for _, ghostUniqueKey := range ghostUniqueKeys {
-			if originalUniqueKey.Columns.Equals(&ghostUniqueKey.Columns) {
+			if originalUniqueKey.Columns.EqualsByNames(&ghostUniqueKey.Columns) {
 				uniqueKeys = append(uniqueKeys, originalUniqueKey)
 			}
 		}
@@ -594,11 +602,11 @@ func (this *Inspector) getSharedUniqueKeys(originalUniqueKeys, ghostUniqueKeys [
 // getSharedColumns returns the intersection of two lists of columns in same order as the first list
 func (this *Inspector) getSharedColumns(originalColumns, ghostColumns *sql.ColumnList, columnRenameMap map[string]string) (*sql.ColumnList, *sql.ColumnList) {
 	columnsInGhost := make(map[string]bool)
-	for _, ghostColumn := range ghostColumns.Names {
+	for _, ghostColumn := range ghostColumns.Names() {
 		columnsInGhost[ghostColumn] = true
 	}
 	sharedColumnNames := []string{}
-	for _, originalColumn := range originalColumns.Names {
+	for _, originalColumn := range originalColumns.Names() {
 		if columnsInGhost[originalColumn] || columnsInGhost[columnRenameMap[originalColumn]] {
 			sharedColumnNames = append(sharedColumnNames, originalColumn)
 		}

go/mysql/connection.go

@@ -48,11 +48,11 @@ func (this *ConnectionConfig) Equals(other *ConnectionConfig) bool {
 }
 
 func (this *ConnectionConfig) GetDBUri(databaseName string) string {
-	var ip = net.ParseIP(this.Key.Hostname)
+	hostname := this.Key.Hostname
+	var ip = net.ParseIP(hostname)
 	if (ip != nil) && (ip.To4() == nil) {
 		// Wrap IPv6 literals in square brackets
-		return fmt.Sprintf("%s:%s@tcp([%s]:%d)/%s", this.User, this.Password, this.Key.Hostname, this.Key.Port, databaseName)
-	} else {
-		return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", this.User, this.Password, this.Key.Hostname, this.Key.Port, databaseName)
+		hostname = fmt.Sprintf("[%s]", hostname)
 	}
+	return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8mb4,utf8,latin1", this.User, this.Password, hostname, this.Key.Port, databaseName)
 }

go/sql/builder.go

@@ -32,29 +32,6 @@ func EscapeName(name string) string {
 	return fmt.Sprintf("`%s`", name)
 }
 
-func fixArgType(arg interface{}, isUnsigned bool) interface{} {
-	if !isUnsigned {
-		return arg
-	}
-	// unsigned
-	if i, ok := arg.(int8); ok {
-		return uint8(i)
-	}
-	if i, ok := arg.(int16); ok {
-		return uint16(i)
-	}
-	if i, ok := arg.(int32); ok {
-		return uint32(i)
-	}
-	if i, ok := arg.(int64); ok {
-		return strconv.FormatUint(uint64(i), 10)
-	}
-	if i, ok := arg.(int); ok {
-		return uint(i)
-	}
-	return arg
-}
-
 func buildPreparedValues(length int) []string {
 	values := make([]string, length, length)
 	for i := 0; i < length; i++ {
@@ -330,14 +307,14 @@ func BuildDMLDeleteQuery(databaseName, tableName string, tableColumns, uniqueKey
 	if uniqueKeyColumns.Len() == 0 {
 		return result, uniqueKeyArgs, fmt.Errorf("No unique key columns found in BuildDMLDeleteQuery")
 	}
-	for _, column := range uniqueKeyColumns.Names {
-		tableOrdinal := tableColumns.Ordinals[column]
-		arg := fixArgType(args[tableOrdinal], uniqueKeyColumns.IsUnsigned(column))
+	for _, column := range uniqueKeyColumns.Columns() {
+		tableOrdinal := tableColumns.Ordinals[column.Name]
+		arg := column.convertArg(args[tableOrdinal])
 		uniqueKeyArgs = append(uniqueKeyArgs, arg)
 	}
 	databaseName = EscapeName(databaseName)
 	tableName = EscapeName(tableName)
-	equalsComparison, err := BuildEqualsPreparedComparison(uniqueKeyColumns.Names)
+	equalsComparison, err := BuildEqualsPreparedComparison(uniqueKeyColumns.Names())
 	if err != nil {
 		return result, uniqueKeyArgs, err
 	}
@@ -367,13 +344,13 @@ func BuildDMLInsertQuery(databaseName, tableName string, tableColumns, sharedCol
 	databaseName = EscapeName(databaseName)
 	tableName = EscapeName(tableName)
 
-	for _, column := range mappedSharedColumns.Names {
-		tableOrdinal := tableColumns.Ordinals[column]
-		arg := fixArgType(args[tableOrdinal], mappedSharedColumns.IsUnsigned(column))
+	for _, column := range mappedSharedColumns.Columns() {
+		tableOrdinal := tableColumns.Ordinals[column.Name]
+		arg := column.convertArg(args[tableOrdinal])
 		sharedArgs = append(sharedArgs, arg)
 	}
 
-	mappedSharedColumnNames := duplicateNames(mappedSharedColumns.Names)
+	mappedSharedColumnNames := duplicateNames(mappedSharedColumns.Names())
 	for i := range mappedSharedColumnNames {
 		mappedSharedColumnNames[i] = EscapeName(mappedSharedColumnNames[i])
 	}
@@ -415,26 +392,26 @@ func BuildDMLUpdateQuery(databaseName, tableName string, tableColumns, sharedCol
 	databaseName = EscapeName(databaseName)
 	tableName = EscapeName(tableName)
 
-	for i, column := range sharedColumns.Names {
-		mappedColumn := mappedSharedColumns.Names[i]
-		tableOrdinal := tableColumns.Ordinals[column]
-		arg := fixArgType(valueArgs[tableOrdinal], mappedSharedColumns.IsUnsigned(mappedColumn))
+	for i, column := range sharedColumns.Columns() {
+		mappedColumn := mappedSharedColumns.Columns()[i]
+		tableOrdinal := tableColumns.Ordinals[column.Name]
+		arg := mappedColumn.convertArg(valueArgs[tableOrdinal])
 		sharedArgs = append(sharedArgs, arg)
 	}
 
-	for _, column := range uniqueKeyColumns.Names {
-		tableOrdinal := tableColumns.Ordinals[column]
-		arg := fixArgType(whereArgs[tableOrdinal], uniqueKeyColumns.IsUnsigned(column))
+	for _, column := range uniqueKeyColumns.Columns() {
+		tableOrdinal := tableColumns.Ordinals[column.Name]
+		arg := column.convertArg(whereArgs[tableOrdinal])
 		uniqueKeyArgs = append(uniqueKeyArgs, arg)
 	}
 
-	mappedSharedColumnNames := duplicateNames(mappedSharedColumns.Names)
+	mappedSharedColumnNames := duplicateNames(mappedSharedColumns.Names())
 	for i := range mappedSharedColumnNames {
 		mappedSharedColumnNames[i] = EscapeName(mappedSharedColumnNames[i])
 	}
 	setClause, err := BuildSetPreparedClause(mappedSharedColumnNames)
 
-	equalsComparison, err := BuildEqualsPreparedComparison(uniqueKeyColumns.Names)
+	equalsComparison, err := BuildEqualsPreparedComparison(uniqueKeyColumns.Names())
 	result = fmt.Sprintf(`
  			update /* gh-ost %s.%s */
  					%s.%s

go/sql/types.go

@@ -8,10 +8,61 @@ package sql
 import (
 	"fmt"
 	"reflect"
+	"strconv"
 	"strings"
+
+	"golang.org/x/text/encoding/charmap"
 )
 
-// ColumnsMap maps a column onto its ordinal position
+type Column struct {
+	Name       string
+	IsUnsigned bool
+	Charset    string
+}
+
+func (this *Column) convertArg(arg interface{}) interface{} {
+	if s, ok := arg.(string); ok {
+		switch this.Charset {
+		case "latin1":
+			arg, _ = charmap.Windows1252.NewDecoder().String(s)
+		}
+		return arg
+	}
+
+	if this.IsUnsigned {
+		if i, ok := arg.(int8); ok {
+			return uint8(i)
+		}
+		if i, ok := arg.(int16); ok {
+			return uint16(i)
+		}
+		if i, ok := arg.(int32); ok {
+			return uint32(i)
+		}
+		if i, ok := arg.(int64); ok {
+			return strconv.FormatUint(uint64(i), 10)
+		}
+		if i, ok := arg.(int); ok {
+			return uint(i)
+		}
+	}
+	return arg
+}
+
+func NewColumns(names []string) []Column {
+	result := make([]Column, len(names))
+	for i := range names {
+		result[i].Name = names[i]
+	}
+	return result
+}
+
+func ParseColumns(names string) []Column {
+	namesArray := strings.Split(names, ",")
+	return NewColumns(namesArray)
+}
+
+// ColumnsMap maps a column name onto its ordinal position
 type ColumnsMap map[string]int
 
 func NewEmptyColumnsMap() ColumnsMap {
@@ -19,62 +70,83 @@ func NewEmptyColumnsMap() ColumnsMap {
 	return ColumnsMap(columnsMap)
 }
 
-func NewColumnsMap(orderedNames []string) ColumnsMap {
+func NewColumnsMap(orderedColumns []Column) ColumnsMap {
 	columnsMap := NewEmptyColumnsMap()
-	for i, column := range orderedNames {
-		columnsMap[column] = i
+	for i, column := range orderedColumns {
+		columnsMap[column.Name] = i
 	}
 	return columnsMap
 }
 
 // ColumnList makes for a named list of columns
 type ColumnList struct {
-	Names         []string
+	columns  []Column
 	Ordinals ColumnsMap
-	UnsignedFlags ColumnsMap
 }
 
 // NewColumnList creates an object given ordered list of column names
 func NewColumnList(names []string) *ColumnList {
 	result := &ColumnList{
-		Names:         names,
-		UnsignedFlags: NewEmptyColumnsMap(),
+		columns: NewColumns(names),
 	}
-	result.Ordinals = NewColumnsMap(result.Names)
+	result.Ordinals = NewColumnsMap(result.columns)
 	return result
 }
 
 // ParseColumnList parses a comma delimited list of column names
-func ParseColumnList(columns string) *ColumnList {
+func ParseColumnList(names string) *ColumnList {
 	result := &ColumnList{
-		Names:         strings.Split(columns, ","),
-		UnsignedFlags: NewEmptyColumnsMap(),
+		columns: ParseColumns(names),
 	}
-	result.Ordinals = NewColumnsMap(result.Names)
+	result.Ordinals = NewColumnsMap(result.columns)
 	return result
 }
 
+func (this *ColumnList) Columns() []Column {
+	return this.columns
+}
+
+func (this *ColumnList) Names() []string {
+	names := make([]string, len(this.columns))
+	for i := range this.columns {
+		names[i] = this.columns[i].Name
+	}
+	return names
+}
+
 func (this *ColumnList) SetUnsigned(columnName string) {
-	this.UnsignedFlags[columnName] = 1
+	this.columns[this.Ordinals[columnName]].IsUnsigned = true
 }
 
 func (this *ColumnList) IsUnsigned(columnName string) bool {
-	return this.UnsignedFlags[columnName] == 1
+	return this.columns[this.Ordinals[columnName]].IsUnsigned
+}
+
+func (this *ColumnList) SetCharset(columnName string, charset string) {
+	this.columns[this.Ordinals[columnName]].Charset = charset
+}
+
+func (this *ColumnList) GetCharset(columnName string) string {
+	return this.columns[this.Ordinals[columnName]].Charset
 }
 
 func (this *ColumnList) String() string {
-	return strings.Join(this.Names, ",")
+	return strings.Join(this.Names(), ",")
 }
 
 func (this *ColumnList) Equals(other *ColumnList) bool {
-	return reflect.DeepEqual(this.Names, other.Names)
+	return reflect.DeepEqual(this.Columns, other.Columns)
+}
+
+func (this *ColumnList) EqualsByNames(other *ColumnList) bool {
+	return reflect.DeepEqual(this.Names(), other.Names())
 }
 
 // IsSubsetOf returns 'true' when column names of this list are a subset of
 // another list, in arbitrary order (order agnostic)
 func (this *ColumnList) IsSubsetOf(other *ColumnList) bool {
-	for _, column := range this.Names {
-		if _, exists := other.Ordinals[column]; !exists {
+	for _, column := range this.columns {
+		if _, exists := other.Ordinals[column.Name]; !exists {
 			return false
 		}
 	}
@@ -82,7 +154,7 @@ func (this *ColumnList) IsSubsetOf(other *ColumnList) bool {
 }
 
 func (this *ColumnList) Len() int {
-	return len(this.Names)
+	return len(this.columns)
 }
 
 // UniqueKey is the combination of a key's name and columns
@@ -107,7 +179,7 @@ func (this *UniqueKey) String() string {
 	if this.IsAutoIncrement {
 		description = fmt.Sprintf("%s (auto_increment)", description)
 	}
-	return fmt.Sprintf("%s: %s; has nullable: %+v", description, this.Columns.Names, this.HasNullable)
+	return fmt.Sprintf("%s: %s; has nullable: %+v", description, this.Columns.Names(), this.HasNullable)
 }
 
 type ColumnValues struct {

go/sql/types_test.go

@@ -8,9 +8,10 @@ package sql
 import (
 	"testing"
 
+	"reflect"
+
 	"github.com/outbrain/golib/log"
 	test "github.com/outbrain/golib/tests"
-	"reflect"
 )
 
 func init() {
@@ -22,7 +23,7 @@ func TestParseColumnList(t *testing.T) {
 
 	columnList := ParseColumnList(names)
 	test.S(t).ExpectEquals(columnList.Len(), 3)
-	test.S(t).ExpectTrue(reflect.DeepEqual(columnList.Names, []string{"id", "category", "max_len"}))
+	test.S(t).ExpectTrue(reflect.DeepEqual(columnList.Names(), []string{"id", "category", "max_len"}))
 	test.S(t).ExpectEquals(columnList.Ordinals["id"], 0)
 	test.S(t).ExpectEquals(columnList.Ordinals["category"], 1)
 	test.S(t).ExpectEquals(columnList.Ordinals["max_len"], 2)

localtests/latin1/create.sql

@@ -16,6 +16,6 @@ create event gh_ost_test
   do
 begin
   insert into gh_ost_test values (null, md5(rand()));
-  insert into gh_ost_test values (null, 'novo proprietário');
-  insert into gh_ost_test values (null, 'usuário');
+  insert into gh_ost_test values (null, 'átesting');
+  insert into gh_ost_test values (null, 'testátest');
 end ;;

localtests/test.sh

@@ -50,7 +50,7 @@ test_single() {
   echo_dot
   gh-ost-test-mysql-replica -e "start slave"
   echo_dot
-  gh-ost-test-mysql-master test < $tests_path/$test_name/create.sql
+  gh-ost-test-mysql-master --default-character-set=utf8mb4 test < $tests_path/$test_name/create.sql
 
   extra_args=""
   if [ -f $tests_path/$test_name/extra_args ] ; then
@@ -79,7 +79,7 @@ test_single() {
     --throttle-query='select timestampdiff(second, min(last_update), now()) < 5 from _gh_ost_test_ghc' \
     --serve-socket-file=/tmp/gh-ost.test.sock \
     --initially-drop-socket-file \
-    --postpone-cut-over-flag-file=/tmp/gh-ost.postpone.flag \
+    --postpone-cut-over-flag-file="" \
     --test-on-replica \
     --default-retries=1 \
     --verbose \
@@ -115,9 +115,12 @@ test_all() {
   find $tests_path ! -path . -type d -mindepth 1 -maxdepth 1 | cut -d "/" -f 3 | egrep "$test_pattern" | while read test_name ; do
     test_single "$test_name"
     if [ $? -ne 0 ] ; then
+      create_statement=$(gh-ost-test-mysql-replica test -t -e "show create table _gh_ost_test_gho \G")
+      echo "$create_statement" >> $test_logfile
       echo "+ FAIL"
       return 1
     else
+      echo
       echo "+ pass"
     fi
     gh-ost-test-mysql-replica -e "start slave"

vendor/github.com/siddontang/go-mysql/replication/row_event.go

@@ -609,7 +609,7 @@ func decodeTimestamp2(data []byte, dec uint16) (string, int, error) {
 		return "0000-00-00 00:00:00", n, nil
 	}
 
-	t := time.Unix(sec, usec*1000).UTC()
+	t := time.Unix(sec, usec*1000).UTC() // .UTC() converted by shlomi-noach
 	return t.Format(TimeFormat), n, nil
 }