WIP: looking into double-charset problems

go/logic/inspect.go

@@ -152,6 +152,10 @@ func (this *Inspector) inspectOriginalAndGhostTables() (err error) {
 		if column.Name == mappedColumn.Name && column.Type == sql.DateTimeColumnType && mappedColumn.Type == sql.TimestampColumnType {
 			this.migrationContext.MappedSharedColumns.SetConvertDatetimeToTimestamp(column.Name, this.migrationContext.ApplierTimeZone)
 		}
+		if column.Name == mappedColumn.Name && column.Charset != "" && column.Charset == mappedColumn.Charset {
+			this.migrationContext.SharedColumns.SetCharsetUnchanged(column.Name)
+			this.migrationContext.MappedSharedColumns.SetCharsetUnchanged(column.Name)
+		}
 	}
 
 	for _, column := range this.migrationContext.UniqueKey.Columns.Columns() {

go/sql/builder.go

@@ -38,6 +38,12 @@ func buildColumnsPreparedValues(columns *ColumnList) []string {
 		var token string
 		if column.timezoneConversion != nil {
 			token = fmt.Sprintf("convert_tz(?, '%s', '%s')", column.timezoneConversion.ToTimezone, "+00:00")
+		} else if column.CharsetUnchanged {
+			token = "?"
+			// token = fmt.Sprintf("BINARY ?")
+			//token = fmt.Sprintf("_%s ?", column.Charset)
+			//			token = fmt.Sprintf("convert(? using %s)", column.Charset)
+			//			token = fmt.Sprintf("convert(?, char character set %s)", column.Charset)
 		} else {
 			token = "?"
 		}

go/sql/types.go

@@ -10,6 +10,8 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
+
+	"github.com/outbrain/golib/log"
 )
 
 type ColumnType int
@@ -29,15 +31,23 @@ type Column struct {
 	Name               string
 	IsUnsigned         bool
 	Charset            string
+	CharsetUnchanged   bool
 	Type               ColumnType
 	timezoneConversion *TimezoneConvertion
 }
 
 func (this *Column) convertArg(arg interface{}) interface{} {
 	if s, ok := arg.(string); ok {
+		if this.CharsetUnchanged {
+			log.Errorf("============== charset unchanged for %+v: %+v, <%+v>", this.Name, this.Charset, arg)
+			// return []byte(s)
+			//return s
+		}
+		log.Errorf("============== charset for %+v: %+v, <%+v>", this.Name, this.Charset, arg)
 		// string, charset conversion
 		if encoding, ok := charsetEncodingMap[this.Charset]; ok {
 			arg, _ = encoding.NewDecoder().String(s)
+			log.Errorf("============== charset converted for %+v: %+v, <%+v>", this.Name, this.Charset, arg)
 		}
 		return arg
 	}
@@ -142,6 +152,10 @@ func (this *ColumnList) IsUnsigned(columnName string) bool {
 	return this.GetColumn(columnName).IsUnsigned
 }
 
+func (this *ColumnList) SetCharsetUnchanged(columnName string) {
+	this.GetColumn(columnName).CharsetUnchanged = true
+}
+
 func (this *ColumnList) SetCharset(columnName string, charset string) {
 	this.GetColumn(columnName).Charset = charset
 }