fix: ensure uniqueness (#6956)

* fix: ensure uniqueness

* only update wrong ones

* Update cmd/setup/16.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

---------

Co-authored-by: Silvan <silvan.reusser@gmail.com>
(cherry picked from commit b563041103)

cmd/setup/16.go

@@ -0,0 +1,33 @@
+package setup
+
+import (
+	"context"
+	_ "embed"
+
+	"github.com/zitadel/logging"
+
+	"github.com/zitadel/zitadel/internal/database"
+)
+
+var (
+	//go:embed 16.sql
+	uniqueConstraintLower string
+)
+
+type UniqueConstraintToLower struct {
+	dbClient *database.DB
+}
+
+func (mig *UniqueConstraintToLower) Execute(ctx context.Context) error {
+	res, err := mig.dbClient.ExecContext(ctx, uniqueConstraintLower)
+	if err != nil {
+		return err
+	}
+	count, err := res.RowsAffected()
+	logging.WithFields("count", count).Info("unique constraints updated")
+	return err
+}
+
+func (mig *UniqueConstraintToLower) String() string {
+	return "16_unique_constraint_lower"
+}

cmd/setup/16.sql

@@ -0,0 +1,13 @@
+WITH casesensitive as (
+    SELECT instance_id, unique_type, lower(unique_field)
+    FROM eventstore.unique_constraints
+    GROUP BY instance_id, unique_type, lower(unique_field)
+    HAVING count(unique_field) < 2
+)
+UPDATE eventstore.unique_constraints c
+    SET unique_field = casesensitive.lower
+    FROM casesensitive
+    WHERE c.instance_id = casesensitive.instance_id
+        AND c.unique_type = casesensitive.unique_type
+        AND lower(c.unique_field) = casesensitive.lower
+        AND c.unique_field <> casesensitive.lower;

cmd/setup/config.go

@@ -61,18 +61,19 @@ func MustNewConfig(v *viper.Viper) *Config {
 }
 
 type Steps struct {
-	s1ProjectionTable     *ProjectionTable
-	s2AssetsTable         *AssetTable
-	FirstInstance         *FirstInstance
-	s5LastFailed          *LastFailed
-	s6OwnerRemoveColumns  *OwnerRemoveColumns
-	s7LogstoreTables      *LogstoreTables
-	s8AuthTokens          *AuthTokenIndexes
-	CorrectCreationDate   *CorrectCreationDate
-	s12AddOTPColumns      *AddOTPColumns
-	s13FixQuotaProjection *FixQuotaConstraints
-	s14NewEventsTable     *NewEventsTable
-	s15CurrentStates      *CurrentProjectionState
+	s1ProjectionTable         *ProjectionTable
+	s2AssetsTable             *AssetTable
+	FirstInstance             *FirstInstance
+	s5LastFailed              *LastFailed
+	s6OwnerRemoveColumns      *OwnerRemoveColumns
+	s7LogstoreTables          *LogstoreTables
+	s8AuthTokens              *AuthTokenIndexes
+	CorrectCreationDate       *CorrectCreationDate
+	s12AddOTPColumns          *AddOTPColumns
+	s13FixQuotaProjection     *FixQuotaConstraints
+	s14NewEventsTable         *NewEventsTable
+	s15CurrentStates          *CurrentProjectionState
+	s16UniqueConstraintsLower *UniqueConstraintToLower
 }
 
 type encryptionKeyConfig struct {

cmd/setup/setup.go

@@ -100,6 +100,7 @@ func Setup(config *Config, steps *Steps, masterKey string) {
 	steps.s13FixQuotaProjection = &FixQuotaConstraints{dbClient: zitadelDBClient}
 	steps.s14NewEventsTable = &NewEventsTable{dbClient: esPusherDBClient}
 	steps.s15CurrentStates = &CurrentProjectionState{dbClient: zitadelDBClient}
+	steps.s16UniqueConstraintsLower = &UniqueConstraintToLower{dbClient: zitadelDBClient}
 
 	err = projection.Create(ctx, zitadelDBClient, eventstoreClient, config.Projections, nil, nil, nil)
 	logging.OnError(err).Fatal("unable to start projections")
@@ -140,6 +141,8 @@ func Setup(config *Config, steps *Steps, masterKey string) {
 	logging.WithFields("name", steps.s13FixQuotaProjection.String()).OnError(err).Fatal("migration failed")
 	err = migration.Migrate(ctx, eventstoreClient, steps.s15CurrentStates)
 	logging.WithFields("name", steps.s15CurrentStates.String()).OnError(err).Fatal("migration failed")
+	err = migration.Migrate(ctx, eventstoreClient, steps.s16UniqueConstraintsLower)
+	logging.WithFields("name", steps.s16UniqueConstraintsLower.String()).OnError(err).Fatal("migration failed")
 
 	for _, repeatableStep := range repeatableSteps {
 		err = migration.Migrate(ctx, eventstoreClient, repeatableStep)

internal/eventstore/v3/unique_constraints.go

@@ -33,6 +33,7 @@ func handleUniqueConstraints(ctx context.Context, tx *sql.Tx, commands []eventst
 
 	for _, command := range commands {
 		for _, constraint := range command.UniqueConstraints() {
+			constraint.UniqueField = strings.ToLower(constraint.UniqueField)
 			switch constraint.Action {
 			case eventstore.UniqueConstraintAdd:
 				addPlaceholders = append(addPlaceholders, fmt.Sprintf("($%d, $%d, $%d)", len(addArgs)+1, len(addArgs)+2, len(addArgs)+3))