feat(update): "skipupdate" while bulk

internal/dbtest/query_test.go

@@ -426,9 +426,14 @@ func TestQuery(t *testing.T) {
 			return db.NewSelect().Model(new(SoftDelete1)).WhereAllWithDeleted()
 		},
 		func(db *bun.DB) schema.QueryAppender {
+			type Model struct {
+				ID   int64 `bun:",pk,autoincrement"`
+				Str1 string
+				Str2 string `bun:",skipupdate"`
+			}
 			models := []Model{
-				{42, "hello"},
-				{43, "world"},
+				{42, "hello", "skip"},
+				{43, "world", "skip"},
 			}
 			return db.NewUpdate().
 				Model(&models).

internal/dbtest/testdata/snapshots/TestQuery-mariadb-69

@@ -1 +1 @@
-WITH `_data` AS (SELECT * FROM (VALUES ROW(42, 'hello'), ROW(43, 'world')) AS t (`id`, `str`)) UPDATE `models` AS `model`, _data SET `model`.`str` = _data.`str` WHERE (`model`.`id` = _data.`id`)
+WITH `_data` AS (SELECT * FROM (VALUES ROW(42, 'hello', 'skip'), ROW(43, 'world', 'skip')) AS t (`id`, `str1`, `str2`)) UPDATE `models` AS `model`, _data SET `model`.`str1` = _data.`str1` WHERE (`model`.`id` = _data.`id`)

internal/dbtest/testdata/snapshots/TestQuery-mssql2019-69

@@ -1 +1 @@
-WITH "_data" AS (SELECT * FROM (VALUES (42, 'hello'), (43, 'world')) AS t ("id", "str")) UPDATE "models" SET "str" = _data."str" FROM _data WHERE ("models"."id" = _data."id")
+WITH "_data" AS (SELECT * FROM (VALUES (42, 'hello', 'skip'), (43, 'world', 'skip')) AS t ("id", "str1", "str2")) UPDATE "models" SET "str1" = _data."str1" FROM _data WHERE ("models"."id" = _data."id")

internal/dbtest/testdata/snapshots/TestQuery-mysql5-69

@@ -1 +1 @@
-WITH `_data` AS (SELECT * FROM (VALUES ROW(42, 'hello'), ROW(43, 'world')) AS t (`id`, `str`)) UPDATE `models` AS `model`, _data SET `model`.`str` = _data.`str` WHERE (`model`.`id` = _data.`id`)
+WITH `_data` AS (SELECT * FROM (VALUES ROW(42, 'hello', 'skip'), ROW(43, 'world', 'skip')) AS t (`id`, `str1`, `str2`)) UPDATE `models` AS `model`, _data SET `model`.`str1` = _data.`str1` WHERE (`model`.`id` = _data.`id`)

internal/dbtest/testdata/snapshots/TestQuery-mysql8-69

@@ -1 +1 @@
-WITH `_data` (`id`, `str`) AS (VALUES ROW(42, 'hello'), ROW(43, 'world')) UPDATE `models` AS `model`, _data SET `model`.`str` = _data.`str` WHERE (`model`.`id` = _data.`id`)
+WITH `_data` (`id`, `str1`, `str2`) AS (VALUES ROW(42, 'hello', 'skip'), ROW(43, 'world', 'skip')) UPDATE `models` AS `model`, _data SET `model`.`str1` = _data.`str1` WHERE (`model`.`id` = _data.`id`)

internal/dbtest/testdata/snapshots/TestQuery-pg-69

@@ -1 +1 @@
-WITH "_data" ("id", "str") AS (VALUES (42::BIGINT, 'hello'::VARCHAR), (43::BIGINT, 'world'::VARCHAR)) UPDATE "models" AS "model" SET "str" = _data."str" FROM _data WHERE ("model"."id" = _data."id")
+WITH "_data" ("id", "str1", "str2") AS (VALUES (42::BIGINT, 'hello'::VARCHAR, 'skip'::VARCHAR), (43::BIGINT, 'world'::VARCHAR, 'skip'::VARCHAR)) UPDATE "models" AS "model" SET "str1" = _data."str1" FROM _data WHERE ("model"."id" = _data."id")

internal/dbtest/testdata/snapshots/TestQuery-pgx-69

@@ -1 +1 @@
-WITH "_data" ("id", "str") AS (VALUES (42::BIGINT, 'hello'::VARCHAR), (43::BIGINT, 'world'::VARCHAR)) UPDATE "models" AS "model" SET "str" = _data."str" FROM _data WHERE ("model"."id" = _data."id")
+WITH "_data" ("id", "str1", "str2") AS (VALUES (42::BIGINT, 'hello'::VARCHAR, 'skip'::VARCHAR), (43::BIGINT, 'world'::VARCHAR, 'skip'::VARCHAR)) UPDATE "models" AS "model" SET "str1" = _data."str1" FROM _data WHERE ("model"."id" = _data."id")

internal/dbtest/testdata/snapshots/TestQuery-sqlite-69

@@ -1 +1 @@
-WITH "_data" ("id", "str") AS (VALUES (42, 'hello'), (43, 'world')) UPDATE "models" AS "model" SET "str" = _data."str" FROM _data WHERE ("model"."id" = _data."id")
+WITH "_data" ("id", "str1", "str2") AS (VALUES (42, 'hello', 'skip'), (43, 'world', 'skip')) UPDATE "models" AS "model" SET "str1" = _data."str1" FROM _data WHERE ("model"."id" = _data."id")

query_update.go

@@ -380,9 +380,14 @@ func (q *UpdateQuery) updateSliceSet(
 	}
 
 	var b []byte
-	for i, field := range fields {
-		if i > 0 {
+	pos := len(b)
+	for _, field := range fields {
+		if field.SkipUpdate() {
+			continue
+		}
+		if len(b) != pos {
 			b = append(b, ", "...)
+			pos = len(b)
 		}
 		if fmter.HasFeature(feature.UpdateMultiTable) {
 			b = append(b, model.table.SQLAlias...)