fix Nullable(Enum()) types corner case for `check_parts_columns: tr…

…ue`, fix #1033

ChangeLog.md

@@ -11,6 +11,7 @@ BUG FIXES
 - fix `TestLongListRemote` for properly time measurement
 - fix log_pointer handle from system.replicas during restore, fix [967](https://github.com/Altinity/clickhouse-backup/issues/967)
 - fix `use_embedded_backup_restore: true` behavior for azblob, fix [1031](https://github.com/Altinity/clickhouse-backup/issues/1031)
+- fix `Nullable(Enum())` types corner case for `check_parts_columns: true`, fix [1033](https://github.com/Altinity/clickhouse-backup/issues/1033)
 
 # v2.6.2
 BUG FIXES

pkg/clickhouse/clickhouse.go

@@ -1250,7 +1250,7 @@ func (ch *ClickHouse) CheckSystemPartsColumns(ctx context.Context, table *Table)
 	partColumnsDataTypes := make([]ColumnDataTypes, 0)
 	partsColumnsSQL := "SELECT column, groupUniqArray(type) AS uniq_types " +
 		"FROM system.parts_columns " +
-		"WHERE active AND database=? AND table=? AND type NOT LIKE 'Enum%(%' AND type NOT LIKE 'Tuple(%' AND type NOT LIKE 'Array(Tuple(%' " +
+		"WHERE active AND database=? AND table=? AND type NOT LIKE 'Enum%(%' AND type NOT LIKE 'Tuple(%' type NOT LIKE 'Nullable(Enum%(%' AND type NOT LIKE 'Nullable(Tuple(%' AND type NOT LIKE 'Array(Tuple(%' AND type NOT LIKE 'Nullable(Array(Tuple(%' " +
 		"GROUP BY column HAVING length(uniq_types) > 1"
 	if err = ch.SelectContext(ctx, &partColumnsDataTypes, partsColumnsSQL, table.Database, table.Name); err != nil {
 		return err