fix: use hash to compare user metadata value (#10749)

# Which Problems Are Solved

Depending on the metadata values (already existing), the newly created
index (#10415) cannot be created or error in the future.

# How the Problems Are Solved

- Create the index using `sha256` and change the query to use sha256 as
well when comparing bytes values such as user_metadata.
- Added a setup step to cleanup potentially created index on
`projections.user_metadata5`

# Additional Changes

None

# Additional Context

- relates to #10415
- requires backport to v4.x

(cherry picked from commit 57e8033b6e)

cmd/setup/65.go

@@ -0,0 +1,27 @@
+package setup
+
+import (
+	"context"
+	_ "embed"
+
+	"github.com/zitadel/zitadel/internal/database"
+	"github.com/zitadel/zitadel/internal/eventstore"
+)
+
+var (
+	//go:embed 65.sql
+	userMetadata5Index string
+)
+
+type FixUserMetadata5Index struct {
+	dbClient *database.DB
+}
+
+func (mig *FixUserMetadata5Index) Execute(ctx context.Context, _ eventstore.Event) error {
+	_, err := mig.dbClient.ExecContext(ctx, userMetadata5Index)
+	return err
+}
+
+func (mig *FixUserMetadata5Index) String() string {
+	return "65_fix_user_metadata5_index"
+}

cmd/setup/65.sql

@@ -0,0 +1,3 @@
+ALTER INDEX IF EXISTS projections.user_metadata5_metadata_key_idx
+    RENAME TO user_metadata5_key_idx;
+DROP INDEX IF EXISTS projections.user_metadata5_metadata_value_idx;

cmd/setup/config.go

@@ -161,6 +161,7 @@ type Steps struct {
 	s62HTTPProviderAddSigningKey            *HTTPProviderAddSigningKey
 	s63AlterResourceCounts                  *AlterResourceCounts
 	s64ChangePushPosition                   *ChangePushPosition
+	s65FixUserMetadata5Index                *FixUserMetadata5Index
 }
 
 func MustNewSteps(v *viper.Viper) *Steps {

cmd/setup/setup.go

@@ -222,6 +222,7 @@ func Setup(ctx context.Context, config *Config, steps *Steps, masterKey string)
 	steps.s62HTTPProviderAddSigningKey = &HTTPProviderAddSigningKey{dbClient: dbClient}
 	steps.s63AlterResourceCounts = &AlterResourceCounts{dbClient: dbClient}
 	steps.s64ChangePushPosition = &ChangePushPosition{dbClient: dbClient}
+	steps.s65FixUserMetadata5Index = &FixUserMetadata5Index{dbClient: dbClient}
 
 	err = projection.Create(ctx, dbClient, eventstoreClient, config.Projections, nil, nil, nil)
 	logging.OnError(err).Fatal("unable to start projections")
@@ -274,6 +275,7 @@ func Setup(ctx context.Context, config *Config, steps *Steps, masterKey string)
 		steps.s62HTTPProviderAddSigningKey,
 		steps.s63AlterResourceCounts,
 		steps.s64ChangePushPosition,
+		steps.s65FixUserMetadata5Index,
 	} {
 		setupErr = executeMigration(ctx, eventstoreClient, step, "migration failed")
 		if setupErr != nil {