fix: increase performance of ListUser by login name ignore case (#12350)

# Which Problems Are Solved

Login v2 uses the `users.v2.ListUsers`-endpoint to get a user by login
name. This query had an inefficient `WHERE`-clause.

# How the Problems Are Solved

Update the view and use a specific clause for this query.

# Additional information

Added in https://github.com/zitadel/zitadel/pull/10475

---------

Co-authored-by: Marco A. <[email protected]>
Co-authored-by: Livio Spring <[email protected]>

apps/login/src/lib/zitadel.ts

@@ -587,6 +587,8 @@ export type ListUsersCommand = WithServiceConfig<{
   organizationId?: string;
 }>;
 
+const userLookupQuery = { limit: 2 };
+
 export async function listUsers({ serviceConfig, loginName, userName, phone, email, organizationId }: ListUsersCommand) {
   const queries: SearchQuery[] = [];
 
@@ -672,7 +674,7 @@ export async function listUsers({ serviceConfig, loginName, userName, phone, ema
 
   const userService: Client<typeof UserService> = await createServiceForHost(UserService, serviceConfig);
 
-  return userService.listUsers({ queries });
+  return userService.listUsers({ query: userLookupQuery, queries });
 }
 
 export type SearchUsersCommand = WithServiceConfig<{
@@ -755,7 +757,7 @@ export async function searchUsers({
 
   const userService: Client<typeof UserService> = await createServiceForHost(UserService, serviceConfig);
 
-  const loginNameResult = await userService.listUsers({ queries });
+  const loginNameResult = await userService.listUsers({ query: userLookupQuery, queries });
 
   if (!loginNameResult || !loginNameResult.details) {
     return { error: t("errors.errorOccured") };
@@ -817,6 +819,7 @@ export async function searchUsers({
   }
 
   const emailOrPhoneResult = await userService.listUsers({
+    query: userLookupQuery,
     queries: emailAndPhoneQueries,
   });
 

cmd/setup/72.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 72.sql
+	addColumnsToLoginNamesView string
+)
+
+type AddColumnsToLoginNamesView struct {
+	dbClient *database.DB
+}
+
+func (mig *AddColumnsToLoginNamesView) Execute(ctx context.Context, _ eventstore.Event) error {
+	_, err := mig.dbClient.ExecContext(ctx, addColumnsToLoginNamesView)
+	return err
+}
+
+func (mig *AddColumnsToLoginNamesView) String() string {
+	return "72_add_columns_to_login_names_view"
+}

cmd/setup/72.sql

@@ -0,0 +1,42 @@
+CREATE OR REPLACE VIEW projections.login_names3 AS (
+    SELECT
+        u.id AS user_id
+        , CASE
+            WHEN p.must_be_domain THEN CONCAT(u.user_name, '@', d.name)
+            ELSE u.user_name
+        END AS login_name
+        , COALESCE(d.is_primary, TRUE) AS is_primary
+        , u.instance_id
+        , u.resource_owner
+        , CASE
+                WHEN p.must_be_domain THEN CONCAT(u.user_name_lower, '@', d.name_lower)
+                ELSE u.user_name_lower
+        END AS login_name_lower
+    FROM
+        projections.login_names3_users AS u
+    LEFT JOIN LATERAL (
+        SELECT
+            must_be_domain
+            , is_default
+        FROM
+            projections.login_names3_policies AS p
+        WHERE
+            (
+                p.instance_id = u.instance_id
+                AND NOT p.is_default
+                AND p.resource_owner = u.resource_owner
+            ) OR (
+                p.instance_id = u.instance_id
+                AND p.is_default
+            )
+        ORDER BY
+            p.is_default -- custom first
+        LIMIT 1
+    ) AS p ON TRUE
+    LEFT JOIN 
+        projections.login_names3_domains d
+        ON 
+            p.must_be_domain 
+            AND u.resource_owner = d.resource_owner 
+            AND u.instance_id = d.instance_id
+);

cmd/setup/config.go

@@ -191,6 +191,7 @@ type Steps struct {
 	s69CacheTablesLogged                    *CacheTablesLogged
 	s70AddEventStoreCommandEnforceOwner     *AddEventStoreCommandEnforceOwnerColumn
 	s71JWTProvideAddAudienceColumn          *JWTProvideAddAudienceColumn
+	s72AddColumnsToLoginNamesView           *AddColumnsToLoginNamesView
 	RelationalTables                        *TransactionalTables
 }
 

cmd/setup/setup.go

@@ -254,6 +254,7 @@ func Setup(ctx context.Context, config *Config, steps *Steps, masterKey string)
 	steps.s69CacheTablesLogged = &CacheTablesLogged{dbClient: dbClient}
 	steps.s70AddEventStoreCommandEnforceOwner = &AddEventStoreCommandEnforceOwnerColumn{dbClient: dbClient}
 	steps.s71JWTProvideAddAudienceColumn = &JWTProvideAddAudienceColumn{dbClient: dbClient}
+	steps.s72AddColumnsToLoginNamesView = &AddColumnsToLoginNamesView{dbClient: dbClient}
 
 	err = projection.Create(ctx, dbClient, eventstoreClient, config.Projections, nil, nil, nil)
 	if err != nil {
@@ -378,6 +379,7 @@ func Setup(ctx context.Context, config *Config, steps *Steps, masterKey string)
 		steps.s66SessionRecoveryCodeCheckedAt,
 		steps.s68TargetAddPayloadTypeColumn,
 		steps.s71JWTProvideAddAudienceColumn,
+		steps.s72AddColumnsToLoginNamesView,
 	} {
 		setupErr = executeMigration(ctx, eventstoreClient, step, "migration failed")
 		if setupErr != nil {

internal/eventstore/handler/v2/init.go

@@ -70,6 +70,8 @@ type InitColumn struct {
 	nullable      bool
 	defaultValue  interface{}
 	deleteCascade string
+	generated     string
+	isStored      bool
 }
 
 type ColumnOption func(*InitColumn)
@@ -105,6 +107,13 @@ func DeleteCascade(column string) ColumnOption {
 	}
 }
 
+func Generated(stmt string, isStored bool) ColumnOption {
+	return func(c *InitColumn) {
+		c.generated = stmt
+		c.isStored = isStored
+	}
+}
+
 type PrimaryKey []string
 
 func NewPrimaryKey(columnNames ...string) PrimaryKey {
@@ -381,6 +390,12 @@ func createColumnsStatement(cols []*InitColumn, tableName string) string {
 		if col.defaultValue != nil {
 			column += " DEFAULT " + defaultValue(col.defaultValue)
 		}
+		if col.generated != "" {
+			column += " GENERATED ALWAYS AS (" + col.generated + ")"
+			if col.isStored {
+				column += " STORED"
+			}
+		}
 		if len(col.deleteCascade) != 0 {
 			column += fmt.Sprintf(" REFERENCES %s (%s) ON DELETE CASCADE", tableName, col.deleteCascade)
 		}

internal/query/login_name.go

@@ -15,6 +15,10 @@ var (
 		name:  projection.LoginNameCol,
 		table: loginNameTable,
 	}
+	LoginNameNameLowerCol = Column{
+		name:  projection.LoginNameLowerCol,
+		table: loginNameTable,
+	}
 	LoginNameIsPrimaryCol = Column{
 		name:  projection.LoginNameIsPrimaryCol,
 		table: loginNameTable,
@@ -23,4 +27,8 @@ var (
 		name:  projection.LoginNameInstanceIDCol,
 		table: loginNameTable,
 	}
+	LoginNameResourceOwnerCol = Column{
+		name:  projection.LoginNameResourceOwnerCol,
+		table: loginNameTable,
+	}
 )

internal/query/projection/login_name.go

@@ -22,10 +22,12 @@ const (
 	LoginNamePolicyProjectionTable = LoginNameProjectionTable + "_" + loginNamePolicySuffix
 	LoginNameDomainProjectionTable = LoginNameProjectionTable + "_" + loginNameDomainSuffix
 
-	LoginNameCol           = "login_name"
-	LoginNameUserCol       = "user_id"
-	LoginNameIsPrimaryCol  = "is_primary"
-	LoginNameInstanceIDCol = "instance_id"
+	LoginNameCol              = "login_name"
+	LoginNameUserCol          = "user_id"
+	LoginNameIsPrimaryCol     = "is_primary"
+	LoginNameInstanceIDCol    = "instance_id"
+	LoginNameLowerCol         = "login_name_lower"
+	LoginNameResourceOwnerCol = "resource_owner"
 
 	usersAlias         = "users"
 	policyCustomAlias  = "policy_custom"
@@ -76,8 +78,7 @@ func (*loginNameProjection) Init() *old_handler.Check {
 			[]*handler.InitColumn{
 				handler.NewColumn(LoginNameUserIDCol, handler.ColumnTypeText),
 				handler.NewColumn(LoginNameUserUserNameCol, handler.ColumnTypeText),
-				// TODO: implement computed columns
-				// handler.NewComputedColumn(loginNameUserUserNameLowerCol, handler.ColumnTypeText),
+				handler.NewColumn(loginNameUserUserNameLowerCol, handler.ColumnTypeText, handler.Generated("lower("+LoginNameUserUserNameCol+")", true)),
 				handler.NewColumn(LoginNameUserResourceOwnerCol, handler.ColumnTypeText),
 				handler.NewColumn(LoginNameUserInstanceIDCol, handler.ColumnTypeText),
 			},
@@ -93,33 +94,30 @@ func (*loginNameProjection) Init() *old_handler.Check {
 					),
 				),
 			),
-			// TODO: uncomment the following line when login_names4 will be created
-			// handler.WithIndex(
-			// 	handler.NewIndex("search", []string{LoginNameUserInstanceIDCol, loginNameUserUserNameLowerCol},
-			// 		handler.WithInclude(LoginNameUserResourceOwnerCol),
-			// 	),
-			// ),
+			handler.WithIndex(
+				handler.NewIndex("search", []string{LoginNameUserInstanceIDCol, loginNameUserUserNameLowerCol},
+					handler.WithInclude(LoginNameUserResourceOwnerCol),
+				),
+			),
 		),
 		handler.NewSuffixedTable(
 			[]*handler.InitColumn{
 				handler.NewColumn(LoginNameDomainNameCol, handler.ColumnTypeText),
-				// TODO: implement computed columns
-				// handler.NewComputedColumn(loginNameDomainNameLowerCol, handler.ColumnTypeText),
+				handler.NewColumn(loginNameDomainNameLowerCol, handler.ColumnTypeText, handler.Generated("lower("+LoginNameDomainNameCol+")", true)),
 				handler.NewColumn(LoginNameDomainIsPrimaryCol, handler.ColumnTypeBool, handler.Default(false)),
 				handler.NewColumn(LoginNameDomainResourceOwnerCol, handler.ColumnTypeText),
 				handler.NewColumn(LoginNameDomainInstanceIDCol, handler.ColumnTypeText),
 			},
 			handler.NewPrimaryKey(LoginNameDomainInstanceIDCol, LoginNameDomainResourceOwnerCol, LoginNameDomainNameCol),
 			loginNameDomainSuffix,
-			// TODO: uncomment the following line when login_names4 will be created
-			// handler.WithIndex(
-			// 	handler.NewIndex("search", []string{LoginNameDomainInstanceIDCol, LoginNameDomainResourceOwnerCol, loginNameDomainNameLowerCol}),
-			// ),
-			// handler.WithIndex(
-			// 	handler.NewIndex("search_result", []string{LoginNameDomainInstanceIDCol, LoginNameDomainResourceOwnerCol},
-			// 		handler.WithInclude(LoginNameDomainIsPrimaryCol),
-			// 	),
-			// ),
+			handler.WithIndex(
+				handler.NewIndex("search", []string{LoginNameDomainInstanceIDCol, LoginNameDomainResourceOwnerCol, loginNameDomainNameLowerCol}),
+			),
+			handler.WithIndex(
+				handler.NewIndex("search_result", []string{LoginNameDomainInstanceIDCol, LoginNameDomainResourceOwnerCol},
+					handler.WithInclude(LoginNameDomainIsPrimaryCol),
+				),
+			),
 		),
 		handler.NewSuffixedTable(
 			[]*handler.InitColumn{

internal/query/projection/login_name_query.sql

@@ -6,6 +6,11 @@ SELECT
     END AS login_name
     , COALESCE(d.is_primary, TRUE) AS is_primary
     , u.instance_id
+    , u.resource_owner
+    , CASE
+            WHEN p.must_be_domain THEN CONCAT(u.user_name_lower, '@', d.name_lower)
+            ELSE u.user_name_lower
+    END AS login_name_lower
 FROM
     projections.login_names3_users AS u
 LEFT JOIN LATERAL (

internal/query/projection/projection.go

@@ -221,6 +221,7 @@ func Projections() []projection {
 func Init(ctx context.Context) error {
 	for _, p := range projections {
 		if err := p.Init(ctx); err != nil {
+			logging.WithError(err).WithField("projection", p.ProjectionName()).Error("failed to initialize projection")
 			return err
 		}
 	}

internal/query/user.go

@@ -803,13 +803,21 @@ func NewUserLoginNameExistsQuery(value string, comparison TextComparison) (Searc
 	if err != nil {
 		return nil, err
 	}
+	resourceOwnerQuery, err := NewColumnComparisonQuery(LoginNameResourceOwnerCol, UserResourceOwnerCol, ColumnEquals)
+	if err != nil {
+		return nil, err
+	}
 	// text query to select data from the linked sub select
-	loginNameQuery, err := NewTextQuery(LoginNameNameCol, value, comparison)
+	var loginNameQuery SearchQuery
+	loginNameQuery, err = NewTextQuery(LoginNameNameCol, value, comparison)
+	if comparison == TextEqualsIgnoreCase {
+		loginNameQuery, err = NewTextQuery(LoginNameNameLowerCol, strings.ToLower(value), TextEquals)
+	}
 	if err != nil {
 		return nil, err
 	}
 	// full definition of the sub select
-	subSelect, err := NewSubSelect(LoginNameUserIDCol, []SearchQuery{instanceQuery, userIDQuery, loginNameQuery})
+	subSelect, err := NewSubSelect(LoginNameUserIDCol, []SearchQuery{instanceQuery, userIDQuery, resourceOwnerQuery, loginNameQuery})
 	if err != nil {
 		return nil, err
 	}