failing on DATETIME-to-TIMESTAMP conversion within chosen key

go/logic/inspect.go

@@ -146,6 +146,12 @@ func (this *Inspector) InspectOriginalAndGhostTables() (err error) {
 		}
 	}
 
+	for _, column := range this.migrationContext.UniqueKey.Columns.Columns() {
+		if this.migrationContext.MappedSharedColumns.HasTimezoneConversion(column.Name) {
+			return fmt.Errorf("No support at this time for converting a column from DATETIME to TIMESTAMP that is also part of the chosen unique key. Column: %s, key: %s", column.Name, this.migrationContext.UniqueKey.Name)
+		}
+	}
+
 	return nil
 }
 

go/sql/types.go

@@ -161,6 +161,10 @@ func (this *ColumnList) SetConvertDatetimeToTimestamp(columnName string, toTimez
 	this.GetColumn(columnName).timezoneConversion = &TimezoneConvertion{ToTimezone: toTimezone}
 }
 
+func (this *ColumnList) HasTimezoneConversion(columnName string) bool {
+	return this.GetColumn(columnName).timezoneConversion != nil
+}
+
 func (this *ColumnList) String() string {
 	return strings.Join(this.Names(), ",")
 }