first attempt at setting enum-to-string right

Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>

go/logic/inspect.go

@@ -187,6 +187,9 @@ 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.Type == sql.EnumColumnType && mappedColumn.Charset != "" {
+			this.migrationContext.MappedSharedColumns.SetEnumToTextConversion(column.Name)
+		}
 	}
 
 	for _, column := range this.migrationContext.UniqueKey.Columns.Columns() {

go/sql/builder.go

@@ -108,6 +108,8 @@ func BuildSetPreparedClause(columns *ColumnList) (result string, err error) {
 		var setToken string
 		if column.timezoneConversion != nil {
 			setToken = fmt.Sprintf("%s=convert_tz(?, '%s', '%s')", EscapeName(column.Name), column.timezoneConversion.ToTimezone, "+00:00")
+		} else if column.enumToTextConversion {
+			setToken = fmt.Sprintf("%s=concat('', ?)", EscapeName(column.Name))
 		} else if column.Type == JSONColumnType {
 			setToken = fmt.Sprintf("%s=convert(? using utf8mb4)", EscapeName(column.Name))
 		} else {

go/sql/types.go

@@ -36,6 +36,7 @@ type Column struct {
 	Charset              string
 	Type                 ColumnType
 	timezoneConversion   *TimezoneConversion
+	enumToTextConversion bool
 }
 
 func (this *Column) convertArg(arg interface{}) interface{} {
@@ -179,6 +180,14 @@ func (this *ColumnList) HasTimezoneConversion(columnName string) bool {
 	return this.GetColumn(columnName).timezoneConversion != nil
 }
 
+func (this *ColumnList) SetEnumToTextConversion(columnName string) {
+	this.GetColumn(columnName).enumToTextConversion = true
+}
+
+func (this *ColumnList) IsEnumToTextConversion(columnName string) bool {
+	return this.GetColumn(columnName).enumToTextConversion
+}
+
 func (this *ColumnList) String() string {
 	return strings.Join(this.Names(), ",")
 }