0.29.1原版

store/db/mysql/attachment.go

@@ -0,0 +1,274 @@
+package mysql
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/encoding/protojson"
+
+	"github.com/usememos/memos/internal/filter"
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateAttachment(ctx context.Context, create *store.Attachment) (*store.Attachment, error) {
+	fields := []string{"`uid`", "`filename`", "`blob`", "`type`", "`size`", "`creator_id`", "`memo_id`", "`storage_type`", "`reference`", "`payload`"}
+	placeholder := []string{"?", "?", "?", "?", "?", "?", "?", "?", "?", "?"}
+	storageType := ""
+	if create.StorageType != storepb.AttachmentStorageType_ATTACHMENT_STORAGE_TYPE_UNSPECIFIED {
+		storageType = create.StorageType.String()
+	}
+	payloadString := "{}"
+	if create.Payload != nil {
+		bytes, err := protojson.Marshal(create.Payload)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to marshal attachment payload")
+		}
+		payloadString = string(bytes)
+	}
+	args := []any{create.UID, create.Filename, create.Blob, create.Type, create.Size, create.CreatorID, create.MemoID, storageType, create.Reference, payloadString}
+
+	stmt := "INSERT INTO `attachment` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholder, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+
+	id32 := int32(id)
+	return d.GetAttachment(ctx, &store.FindAttachment{ID: &id32})
+}
+
+func (d *DB) ListAttachments(ctx context.Context, find *store.FindAttachment) ([]*store.Attachment, error) {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if v := find.ID; v != nil {
+		where, args = append(where, "`attachment`.`id` = ?"), append(args, *v)
+	}
+	if v := find.UID; v != nil {
+		where, args = append(where, "`attachment`.`uid` = ?"), append(args, *v)
+	}
+	if v := find.CreatorID; v != nil {
+		where, args = append(where, "`attachment`.`creator_id` = ?"), append(args, *v)
+	}
+	if v := find.Filename; v != nil {
+		where, args = append(where, "`attachment`.`filename` = ?"), append(args, *v)
+	}
+	if v := find.FilenameSearch; v != nil {
+		where, args = append(where, "`attachment`.`filename` LIKE ?"), append(args, "%"+*v+"%")
+	}
+	if v := find.MemoID; v != nil {
+		where, args = append(where, "`attachment`.`memo_id` = ?"), append(args, *v)
+	}
+	if len(find.MemoIDList) > 0 {
+		placeholders := make([]string, 0, len(find.MemoIDList))
+		for range find.MemoIDList {
+			placeholders = append(placeholders, "?")
+		}
+		where = append(where, "`attachment`.`memo_id` IN ("+strings.Join(placeholders, ",")+")")
+		for _, id := range find.MemoIDList {
+			args = append(args, id)
+		}
+	}
+	if find.HasRelatedMemo {
+		where = append(where, "`attachment`.`memo_id` IS NOT NULL")
+	}
+	if find.StorageType != nil {
+		where, args = append(where, "`attachment`.`storage_type` = ?"), append(args, find.StorageType.String())
+	}
+
+	if len(find.Filters) > 0 {
+		engine, err := filter.DefaultAttachmentEngine()
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to get filter engine")
+		}
+		if err := filter.AppendConditions(ctx, engine, find.Filters, filter.DialectMySQL, &where, &args); err != nil {
+			return nil, errors.Wrap(err, "failed to append filter conditions")
+		}
+	}
+
+	fields := []string{
+		"`attachment`.`id` AS `id`",
+		"`attachment`.`uid` AS `uid`",
+		"`attachment`.`filename` AS `filename`",
+		"`attachment`.`type` AS `type`",
+		"`attachment`.`size` AS `size`",
+		"`attachment`.`creator_id` AS `creator_id`",
+		"UNIX_TIMESTAMP(`attachment`.`created_ts`) AS `created_ts`",
+		"UNIX_TIMESTAMP(`attachment`.`updated_ts`) AS `updated_ts`",
+		"`attachment`.`memo_id` AS `memo_id`",
+		"`attachment`.`storage_type` AS `storage_type`",
+		"`attachment`.`reference` AS `reference`",
+		"`attachment`.`payload` AS `payload`",
+		"CASE WHEN `memo`.`uid` IS NOT NULL THEN `memo`.`uid` ELSE NULL END AS `memo_uid`",
+	}
+	if find.GetBlob {
+		fields = append(fields, "`attachment`.`blob` AS `blob`")
+	}
+
+	query := "SELECT " + strings.Join(fields, ", ") + " FROM `attachment`" + " " +
+		"LEFT JOIN `memo` ON `attachment`.`memo_id` = `memo`.`id`" + " " +
+		"WHERE " + strings.Join(where, " AND ") + " " +
+		"ORDER BY `updated_ts` DESC"
+	if find.Limit != nil {
+		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
+		if find.Offset != nil {
+			query = fmt.Sprintf("%s OFFSET %d", query, *find.Offset)
+		}
+	}
+
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := make([]*store.Attachment, 0)
+	for rows.Next() {
+		attachment := store.Attachment{}
+		var memoID sql.NullInt32
+		var storageType string
+		var payloadBytes []byte
+		dests := []any{
+			&attachment.ID,
+			&attachment.UID,
+			&attachment.Filename,
+			&attachment.Type,
+			&attachment.Size,
+			&attachment.CreatorID,
+			&attachment.CreatedTs,
+			&attachment.UpdatedTs,
+			&memoID,
+			&storageType,
+			&attachment.Reference,
+			&payloadBytes,
+			&attachment.MemoUID,
+		}
+		if find.GetBlob {
+			dests = append(dests, &attachment.Blob)
+		}
+		if err := rows.Scan(dests...); err != nil {
+			return nil, err
+		}
+
+		if memoID.Valid {
+			attachment.MemoID = &memoID.Int32
+		}
+		attachment.StorageType = storepb.AttachmentStorageType(storepb.AttachmentStorageType_value[storageType])
+		payload := &storepb.AttachmentPayload{}
+		if err := protojsonUnmarshaler.Unmarshal(payloadBytes, payload); err != nil {
+			return nil, err
+		}
+		attachment.Payload = payload
+		list = append(list, &attachment)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) GetAttachment(ctx context.Context, find *store.FindAttachment) (*store.Attachment, error) {
+	list, err := d.ListAttachments(ctx, find)
+	if err != nil {
+		return nil, err
+	}
+	if len(list) == 0 {
+		return nil, nil
+	}
+
+	return list[0], nil
+}
+
+func (d *DB) UpdateAttachment(ctx context.Context, update *store.UpdateAttachment) error {
+	set, args := []string{}, []any{}
+
+	if v := update.UID; v != nil {
+		set, args = append(set, "`uid` = ?"), append(args, *v)
+	}
+	if v := update.UpdatedTs; v != nil {
+		set, args = append(set, "`updated_ts` = FROM_UNIXTIME(?)"), append(args, *v)
+	}
+	if v := update.Filename; v != nil {
+		set, args = append(set, "`filename` = ?"), append(args, *v)
+	}
+	if v := update.MemoID; v != nil {
+		set, args = append(set, "`memo_id` = ?"), append(args, *v)
+	}
+	if v := update.Reference; v != nil {
+		set, args = append(set, "`reference` = ?"), append(args, *v)
+	}
+	if v := update.Payload; v != nil {
+		bytes, err := protojson.Marshal(v)
+		if err != nil {
+			return errors.Wrap(err, "failed to marshal attachment payload")
+		}
+		set, args = append(set, "`payload` = ?"), append(args, string(bytes))
+	}
+
+	args = append(args, update.ID)
+	stmt := "UPDATE `attachment` SET " + strings.Join(set, ", ") + " WHERE `id` = ?"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return err
+	}
+	if _, err := result.RowsAffected(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (d *DB) DeleteAttachment(ctx context.Context, delete *store.DeleteAttachment) error {
+	stmt := "DELETE FROM `attachment` WHERE `id` = ?"
+	result, err := d.db.ExecContext(ctx, stmt, delete.ID)
+	if err != nil {
+		return err
+	}
+	if _, err := result.RowsAffected(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (d *DB) DeleteAttachments(ctx context.Context, deletes []*store.DeleteAttachment) error {
+	if len(deletes) == 0 {
+		return nil
+	}
+
+	tx, err := d.db.BeginTx(ctx, nil)
+	if err != nil {
+		return errors.Wrap(err, "failed to start attachment delete transaction")
+	}
+	defer func() {
+		if tx != nil {
+			_ = tx.Rollback()
+		}
+	}()
+
+	stmt := "DELETE FROM `attachment` WHERE `id` = ?"
+	for _, delete := range deletes {
+		result, err := tx.ExecContext(ctx, stmt, delete.ID)
+		if err != nil {
+			return err
+		}
+		if _, err := result.RowsAffected(); err != nil {
+			return err
+		}
+	}
+
+	if err := tx.Commit(); err != nil {
+		return err
+	}
+	tx = nil
+	return nil
+}

store/db/mysql/common.go

@@ -0,0 +1,10 @@
+package mysql
+
+import "google.golang.org/protobuf/encoding/protojson"
+
+var (
+	protojsonUnmarshaler = protojson.UnmarshalOptions{
+		AllowPartial:   true,
+		DiscardUnknown: true,
+	}
+)

store/db/mysql/idp.go

@@ -0,0 +1,130 @@
+package mysql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateIdentityProvider(ctx context.Context, create *store.IdentityProvider) (*store.IdentityProvider, error) {
+	placeholders := []string{"?", "?", "?", "?", "?"}
+	fields := []string{"`uid`", "`name`", "`type`", "`identifier_filter`", "`config`"}
+	args := []any{create.UID, create.Name, create.Type.String(), create.IdentifierFilter, create.Config}
+
+	stmt := "INSERT INTO `idp` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholders, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+
+	create.ID = int32(id)
+	return create, nil
+}
+
+func (d *DB) ListIdentityProviders(ctx context.Context, find *store.FindIdentityProvider) ([]*store.IdentityProvider, error) {
+	where, args := []string{"1 = 1"}, []any{}
+	if v := find.ID; v != nil {
+		where, args = append(where, "`id` = ?"), append(args, *v)
+	}
+	if v := find.UID; v != nil {
+		where, args = append(where, "`uid` = ?"), append(args, *v)
+	}
+
+	rows, err := d.db.QueryContext(ctx, "SELECT `id`, `uid`, `name`, `type`, `identifier_filter`, `config` FROM `idp` WHERE "+strings.Join(where, " AND ")+" ORDER BY `id` ASC",
+		args...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var identityProviders []*store.IdentityProvider
+	for rows.Next() {
+		var identityProvider store.IdentityProvider
+		var typeString string
+		if err := rows.Scan(
+			&identityProvider.ID,
+			&identityProvider.UID,
+			&identityProvider.Name,
+			&typeString,
+			&identityProvider.IdentifierFilter,
+			&identityProvider.Config,
+		); err != nil {
+			return nil, err
+		}
+		identityProvider.Type = storepb.IdentityProvider_Type(storepb.IdentityProvider_Type_value[typeString])
+		identityProviders = append(identityProviders, &identityProvider)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return identityProviders, nil
+}
+
+func (d *DB) GetIdentityProvider(ctx context.Context, find *store.FindIdentityProvider) (*store.IdentityProvider, error) {
+	list, err := d.ListIdentityProviders(ctx, find)
+	if err != nil {
+		return nil, err
+	}
+	if len(list) == 0 {
+		return nil, nil
+	}
+
+	identityProvider := list[0]
+	return identityProvider, nil
+}
+
+func (d *DB) UpdateIdentityProvider(ctx context.Context, update *store.UpdateIdentityProvider) (*store.IdentityProvider, error) {
+	set, args := []string{}, []any{}
+	if v := update.Name; v != nil {
+		set, args = append(set, "`name` = ?"), append(args, *v)
+	}
+	if v := update.IdentifierFilter; v != nil {
+		set, args = append(set, "`identifier_filter` = ?"), append(args, *v)
+	}
+	if v := update.Config; v != nil {
+		set, args = append(set, "`config` = ?"), append(args, *v)
+	}
+	args = append(args, update.ID)
+
+	stmt := "UPDATE `idp` SET " + strings.Join(set, ", ") + " WHERE `id` = ?"
+	_, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	identityProvider, err := d.GetIdentityProvider(ctx, &store.FindIdentityProvider{
+		ID: &update.ID,
+	})
+	if err != nil {
+		return nil, err
+	}
+	if identityProvider == nil {
+		return nil, errors.Errorf("idp %d not found", update.ID)
+	}
+	return identityProvider, nil
+}
+
+func (d *DB) DeleteIdentityProvider(ctx context.Context, delete *store.DeleteIdentityProvider) error {
+	where, args := []string{"`id` = ?"}, []any{delete.ID}
+	stmt := "DELETE FROM `idp` WHERE " + strings.Join(where, " AND ")
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return err
+	}
+	if _, err = result.RowsAffected(); err != nil {
+		return err
+	}
+	return nil
+}

store/db/mysql/inbox.go

@@ -0,0 +1,150 @@
+package mysql
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/encoding/protojson"
+
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateInbox(ctx context.Context, create *store.Inbox) (*store.Inbox, error) {
+	messageString := "{}"
+	if create.Message != nil {
+		bytes, err := protojson.Marshal(create.Message)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to marshal inbox message")
+		}
+		messageString = string(bytes)
+	}
+
+	fields := []string{"`sender_id`", "`receiver_id`", "`status`", "`message`"}
+	placeholder := []string{"?", "?", "?", "?"}
+	args := []any{create.SenderID, create.ReceiverID, create.Status, messageString}
+
+	stmt := "INSERT INTO `inbox` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholder, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+
+	id32 := int32(id)
+	inbox, err := d.GetInbox(ctx, &store.FindInbox{ID: &id32})
+	if err != nil {
+		return nil, err
+	}
+	return inbox, nil
+}
+
+func (d *DB) ListInboxes(ctx context.Context, find *store.FindInbox) ([]*store.Inbox, error) {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if find.ID != nil {
+		where, args = append(where, "`id` = ?"), append(args, *find.ID)
+	}
+	if find.SenderID != nil {
+		where, args = append(where, "`sender_id` = ?"), append(args, *find.SenderID)
+	}
+	if find.ReceiverID != nil {
+		where, args = append(where, "`receiver_id` = ?"), append(args, *find.ReceiverID)
+	}
+	if find.Status != nil {
+		where, args = append(where, "`status` = ?"), append(args, *find.Status)
+	}
+	if find.MessageType != nil {
+		// Filter by message type using JSON extraction
+		// Note: The type field in JSON is stored as string representation of the enum name
+		if *find.MessageType == storepb.InboxMessage_TYPE_UNSPECIFIED {
+			where, args = append(where, "(JSON_EXTRACT(`message`, '$.type') IS NULL OR JSON_EXTRACT(`message`, '$.type') = ?)"), append(args, find.MessageType.String())
+		} else {
+			where, args = append(where, "JSON_EXTRACT(`message`, '$.type') = ?"), append(args, find.MessageType.String())
+		}
+	}
+
+	query := "SELECT `id`, UNIX_TIMESTAMP(`created_ts`), `sender_id`, `receiver_id`, `status`, `message` FROM `inbox` WHERE " + strings.Join(where, " AND ") + " ORDER BY `created_ts` DESC"
+	if find.Limit != nil {
+		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
+		if find.Offset != nil {
+			query = fmt.Sprintf("%s OFFSET %d", query, *find.Offset)
+		}
+	}
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := []*store.Inbox{}
+	for rows.Next() {
+		inbox := &store.Inbox{}
+		var messageBytes []byte
+		if err := rows.Scan(
+			&inbox.ID,
+			&inbox.CreatedTs,
+			&inbox.SenderID,
+			&inbox.ReceiverID,
+			&inbox.Status,
+			&messageBytes,
+		); err != nil {
+			return nil, err
+		}
+
+		message := &storepb.InboxMessage{}
+		if err := protojsonUnmarshaler.Unmarshal(messageBytes, message); err != nil {
+			return nil, err
+		}
+		inbox.Message = message
+		list = append(list, inbox)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) GetInbox(ctx context.Context, find *store.FindInbox) (*store.Inbox, error) {
+	list, err := d.ListInboxes(ctx, find)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get inbox")
+	}
+	if len(list) != 1 {
+		return nil, errors.Errorf("unexpected inbox count: %d", len(list))
+	}
+	return list[0], nil
+}
+
+func (d *DB) UpdateInbox(ctx context.Context, update *store.UpdateInbox) (*store.Inbox, error) {
+	set, args := []string{"`status` = ?"}, []any{update.Status.String()}
+	args = append(args, update.ID)
+	query := "UPDATE `inbox` SET " + strings.Join(set, ", ") + " WHERE `id` = ?"
+	if _, err := d.db.ExecContext(ctx, query, args...); err != nil {
+		return nil, errors.Wrap(err, "failed to update inbox")
+	}
+	inbox, err := d.GetInbox(ctx, &store.FindInbox{ID: &update.ID})
+	if err != nil {
+		return nil, err
+	}
+	return inbox, nil
+}
+
+func (d *DB) DeleteInbox(ctx context.Context, delete *store.DeleteInbox) error {
+	result, err := d.db.ExecContext(ctx, "DELETE FROM `inbox` WHERE `id` = ?", delete.ID)
+	if err != nil {
+		return errors.Wrap(err, "failed to delete inbox")
+	}
+	if _, err := result.RowsAffected(); err != nil {
+		return err
+	}
+	return nil
+}

store/db/mysql/instance_setting.go

@@ -0,0 +1,65 @@
+package mysql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) UpsertInstanceSetting(ctx context.Context, upsert *store.InstanceSetting) (*store.InstanceSetting, error) {
+	stmt := "INSERT INTO `system_setting` (`name`, `value`, `description`) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE `value` = ?, `description` = ?"
+	_, err := d.db.ExecContext(
+		ctx,
+		stmt,
+		upsert.Name,
+		upsert.Value,
+		upsert.Description,
+		upsert.Value,
+		upsert.Description,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return upsert, nil
+}
+
+func (d *DB) ListInstanceSettings(ctx context.Context, find *store.FindInstanceSetting) ([]*store.InstanceSetting, error) {
+	where, args := []string{"1 = 1"}, []any{}
+	if find.Name != "" {
+		where, args = append(where, "`name` = ?"), append(args, find.Name)
+	}
+
+	query := "SELECT `name`, `value`, `description` FROM `system_setting` WHERE " + strings.Join(where, " AND ")
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := []*store.InstanceSetting{}
+	for rows.Next() {
+		systemSettingMessage := &store.InstanceSetting{}
+		if err := rows.Scan(
+			&systemSettingMessage.Name,
+			&systemSettingMessage.Value,
+			&systemSettingMessage.Description,
+		); err != nil {
+			return nil, err
+		}
+		list = append(list, systemSettingMessage)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) DeleteInstanceSetting(ctx context.Context, delete *store.DeleteInstanceSetting) error {
+	stmt := "DELETE FROM `system_setting` WHERE `name` = ?"
+	_, err := d.db.ExecContext(ctx, stmt, delete.Name)
+	return err
+}

store/db/mysql/memo.go

@@ -0,0 +1,270 @@
+package mysql
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/encoding/protojson"
+
+	"github.com/usememos/memos/internal/filter"
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateMemo(ctx context.Context, create *store.Memo) (*store.Memo, error) {
+	fields := []string{"`uid`", "`creator_id`", "`content`", "`visibility`", "`payload`"}
+	placeholder := []string{"?", "?", "?", "?", "?"}
+	payload := "{}"
+	if create.Payload != nil {
+		payloadBytes, err := protojson.Marshal(create.Payload)
+		if err != nil {
+			return nil, err
+		}
+		payload = string(payloadBytes)
+	}
+	args := []any{create.UID, create.CreatorID, create.Content, create.Visibility, payload}
+
+	// Add custom timestamps if provided
+	if create.CreatedTs != 0 {
+		fields = append(fields, "`created_ts`")
+		placeholder = append(placeholder, "FROM_UNIXTIME(?)")
+		args = append(args, create.CreatedTs)
+	}
+	if create.UpdatedTs != 0 {
+		fields = append(fields, "`updated_ts`")
+		placeholder = append(placeholder, "FROM_UNIXTIME(?)")
+		args = append(args, create.UpdatedTs)
+	}
+
+	stmt := "INSERT INTO `memo` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholder, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	rawID, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+	id := int32(rawID)
+	memo, err := d.GetMemo(ctx, &store.FindMemo{ID: &id})
+	if err != nil {
+		return nil, err
+	}
+	if memo == nil {
+		return nil, errors.Errorf("failed to create memo")
+	}
+	return memo, nil
+}
+
+func (d *DB) ListMemos(ctx context.Context, find *store.FindMemo) ([]*store.Memo, error) {
+	where, having, args := []string{"1 = 1"}, []string{"1 = 1"}, []any{}
+
+	engine, err := filter.DefaultEngine()
+	if err != nil {
+		return nil, err
+	}
+	if err := filter.AppendConditions(ctx, engine, find.Filters, filter.DialectMySQL, &where, &args); err != nil {
+		return nil, err
+	}
+	if v := find.ID; v != nil {
+		where, args = append(where, "`memo`.`id` = ?"), append(args, *v)
+	}
+	if len(find.IDList) > 0 {
+		placeholders := make([]string, 0, len(find.IDList))
+		for range find.IDList {
+			placeholders = append(placeholders, "?")
+		}
+		where = append(where, "`memo`.`id` IN ("+strings.Join(placeholders, ",")+")")
+		for _, id := range find.IDList {
+			args = append(args, id)
+		}
+	}
+	if v := find.UID; v != nil {
+		where, args = append(where, "`memo`.`uid` = ?"), append(args, *v)
+	}
+	if len(find.UIDList) > 0 {
+		placeholders := make([]string, 0, len(find.UIDList))
+		for range find.UIDList {
+			placeholders = append(placeholders, "?")
+		}
+		where = append(where, "`memo`.`uid` IN ("+strings.Join(placeholders, ",")+")")
+		for _, uid := range find.UIDList {
+			args = append(args, uid)
+		}
+	}
+	if v := find.CreatorID; v != nil {
+		where, args = append(where, "`memo`.`creator_id` = ?"), append(args, *v)
+	}
+	if v := find.RowStatus; v != nil {
+		where, args = append(where, "`memo`.`row_status` = ?"), append(args, *v)
+	}
+	if v := find.VisibilityList; len(v) != 0 {
+		placeholder := []string{}
+		for _, visibility := range v {
+			placeholder = append(placeholder, "?")
+			args = append(args, visibility.String())
+		}
+		where = append(where, fmt.Sprintf("`memo`.`visibility` in (%s)", strings.Join(placeholder, ",")))
+	}
+	if find.ExcludeComments {
+		having = append(having, "`parent_uid` IS NULL")
+	}
+
+	order := "DESC"
+	if find.OrderByTimeAsc {
+		order = "ASC"
+	}
+	orderBy := []string{}
+	if find.OrderByPinned {
+		orderBy = append(orderBy, "`pinned` DESC")
+	}
+	if find.OrderByUpdatedTs {
+		orderBy = append(orderBy, "`updated_ts` "+order)
+	} else {
+		orderBy = append(orderBy, "`created_ts` "+order)
+	}
+	// Add id as final tie-breaker
+	orderBy = append(orderBy, "`id` DESC")
+	fields := []string{
+		"`memo`.`id` AS `id`",
+		"`memo`.`uid` AS `uid`",
+		"`memo`.`creator_id` AS `creator_id`",
+		"UNIX_TIMESTAMP(`memo`.`created_ts`) AS `created_ts`",
+		"UNIX_TIMESTAMP(`memo`.`updated_ts`) AS `updated_ts`",
+		"`memo`.`row_status` AS `row_status`",
+		"`memo`.`visibility` AS `visibility`",
+		"`memo`.`pinned` AS `pinned`",
+		"`memo`.`payload` AS `payload`",
+		"CASE WHEN `parent_memo`.`uid` IS NOT NULL THEN `parent_memo`.`uid` ELSE NULL END AS `parent_uid`",
+	}
+	if !find.ExcludeContent {
+		fields = append(fields, "`memo`.`content` AS `content`")
+	}
+
+	query := "SELECT " + strings.Join(fields, ", ") + " FROM `memo`" + " " +
+		"LEFT JOIN `user` AS `memo_creator` ON `memo`.`creator_id` = `memo_creator`.`id`" + " " +
+		"LEFT JOIN `memo_relation` ON `memo`.`id` = `memo_relation`.`memo_id` AND `memo_relation`.`type` = 'COMMENT'" + " " +
+		"LEFT JOIN `memo` AS `parent_memo` ON `memo_relation`.`related_memo_id` = `parent_memo`.`id`" + " " +
+		"WHERE " + strings.Join(where, " AND ") + " " +
+		"HAVING " + strings.Join(having, " AND ") + " " +
+		"ORDER BY " + strings.Join(orderBy, ", ")
+	if find.Limit != nil {
+		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
+		if find.Offset != nil {
+			query = fmt.Sprintf("%s OFFSET %d", query, *find.Offset)
+		}
+	}
+
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := make([]*store.Memo, 0)
+	for rows.Next() {
+		var memo store.Memo
+		var payloadBytes []byte
+		dests := []any{
+			&memo.ID,
+			&memo.UID,
+			&memo.CreatorID,
+			&memo.CreatedTs,
+			&memo.UpdatedTs,
+			&memo.RowStatus,
+			&memo.Visibility,
+			&memo.Pinned,
+			&payloadBytes,
+			&memo.ParentUID,
+		}
+		if !find.ExcludeContent {
+			dests = append(dests, &memo.Content)
+		}
+		if err := rows.Scan(dests...); err != nil {
+			return nil, err
+		}
+		payload := &storepb.MemoPayload{}
+		if err := protojsonUnmarshaler.Unmarshal(payloadBytes, payload); err != nil {
+			return nil, errors.Wrap(err, "failed to unmarshal payload")
+		}
+		memo.Payload = payload
+		list = append(list, &memo)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) GetMemo(ctx context.Context, find *store.FindMemo) (*store.Memo, error) {
+	list, err := d.ListMemos(ctx, find)
+	if err != nil {
+		return nil, err
+	}
+	if len(list) == 0 {
+		return nil, nil
+	}
+
+	memo := list[0]
+	return memo, nil
+}
+
+func (d *DB) UpdateMemo(ctx context.Context, update *store.UpdateMemo) error {
+	set, args := []string{}, []any{}
+	if v := update.UID; v != nil {
+		set, args = append(set, "`uid` = ?"), append(args, *v)
+	}
+	if v := update.CreatedTs; v != nil {
+		set, args = append(set, "`created_ts` = FROM_UNIXTIME(?)"), append(args, *v)
+	}
+	if v := update.UpdatedTs; v != nil {
+		set, args = append(set, "`updated_ts` = FROM_UNIXTIME(?)"), append(args, *v)
+	}
+	if v := update.RowStatus; v != nil {
+		set, args = append(set, "`row_status` = ?"), append(args, *v)
+	}
+	if v := update.Content; v != nil {
+		set, args = append(set, "`content` = ?"), append(args, *v)
+	}
+	if v := update.Visibility; v != nil {
+		set, args = append(set, "`visibility` = ?"), append(args, *v)
+	}
+	if v := update.Pinned; v != nil {
+		set, args = append(set, "`pinned` = ?"), append(args, *v)
+	}
+	if v := update.Payload; v != nil {
+		payloadBytes, err := protojson.Marshal(v)
+		if err != nil {
+			return err
+		}
+		set, args = append(set, "`payload` = ?"), append(args, string(payloadBytes))
+	}
+	if len(set) == 0 {
+		return nil
+	}
+	args = append(args, update.ID)
+
+	stmt := "UPDATE `memo` SET " + strings.Join(set, ", ") + " WHERE `id` = ?"
+	if _, err := d.db.ExecContext(ctx, stmt, args...); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (d *DB) DeleteMemo(ctx context.Context, delete *store.DeleteMemo) error {
+	where, args := []string{"`id` = ?"}, []any{delete.ID}
+	stmt := "DELETE FROM `memo` WHERE " + strings.Join(where, " AND ")
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return err
+	}
+	if _, err := result.RowsAffected(); err != nil {
+		return err
+	}
+	return nil
+}

store/db/mysql/memo_relation.go

@@ -0,0 +1,146 @@
+package mysql
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/usememos/memos/internal/filter"
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) UpsertMemoRelation(ctx context.Context, create *store.MemoRelation) (*store.MemoRelation, error) {
+	stmt := "INSERT INTO `memo_relation` (`memo_id`, `related_memo_id`, `type`) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE `type` = `type`"
+	_, err := d.db.ExecContext(
+		ctx,
+		stmt,
+		create.MemoID,
+		create.RelatedMemoID,
+		create.Type,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	memoRelation := store.MemoRelation{
+		MemoID:        create.MemoID,
+		RelatedMemoID: create.RelatedMemoID,
+		Type:          create.Type,
+	}
+
+	return &memoRelation, nil
+}
+
+func (d *DB) ListMemoRelations(ctx context.Context, find *store.FindMemoRelation) ([]*store.MemoRelation, error) {
+	where, args := []string{"TRUE"}, []any{}
+	if find.MemoID != nil {
+		where, args = append(where, "`memo_id` = ?"), append(args, *find.MemoID)
+	}
+	if find.RelatedMemoID != nil {
+		where, args = append(where, "`related_memo_id` = ?"), append(args, *find.RelatedMemoID)
+	}
+	if find.Type != nil {
+		where, args = append(where, "`type` = ?"), append(args, *find.Type)
+	}
+	if len(find.MemoIDList) > 0 {
+		placeholders := make([]string, len(find.MemoIDList))
+		for i, id := range find.MemoIDList {
+			placeholders[i] = "?"
+			args = append(args, id)
+		}
+		inClause := strings.Join(placeholders, ", ")
+		for _, id := range find.MemoIDList {
+			args = append(args, id)
+		}
+		where = append(where, fmt.Sprintf("(`memo_id` IN (%s) OR `related_memo_id` IN (%s))", inClause, inClause))
+	}
+	if len(find.SourceMemoIDList) > 0 {
+		placeholders := make([]string, len(find.SourceMemoIDList))
+		for i, id := range find.SourceMemoIDList {
+			placeholders[i] = "?"
+			args = append(args, id)
+		}
+		where = append(where, fmt.Sprintf("`memo_id` IN (%s)", strings.Join(placeholders, ", ")))
+	}
+	if len(find.RelatedMemoIDList) > 0 {
+		placeholders := make([]string, len(find.RelatedMemoIDList))
+		for i, id := range find.RelatedMemoIDList {
+			placeholders[i] = "?"
+			args = append(args, id)
+		}
+		where = append(where, fmt.Sprintf("`related_memo_id` IN (%s)", strings.Join(placeholders, ", ")))
+	}
+	if find.MemoFilter != nil {
+		engine, err := filter.DefaultEngine()
+		if err != nil {
+			return nil, err
+		}
+		stmt, err := engine.CompileToStatement(ctx, *find.MemoFilter, filter.RenderOptions{
+			Dialect:           filter.DialectMySQL,
+			PlaceholderOffset: 0,
+		})
+		if err != nil {
+			return nil, err
+		}
+		if stmt.SQL != "" {
+			where = append(where, fmt.Sprintf("memo_id IN (SELECT id FROM memo WHERE %s)", stmt.SQL))
+			where = append(where, fmt.Sprintf("related_memo_id IN (SELECT id FROM memo WHERE %s)", stmt.SQL))
+			args = append(args, append(stmt.Args, stmt.Args...)...)
+		}
+	}
+
+	query := "SELECT `memo_id`, `related_memo_id`, `type` FROM `memo_relation` WHERE " + strings.Join(where, " AND ") + " ORDER BY `memo_id` DESC"
+	if find.Limit != nil {
+		query = fmt.Sprintf("%s LIMIT %d", query, *find.Limit)
+		if find.Offset != nil {
+			query = fmt.Sprintf("%s OFFSET %d", query, *find.Offset)
+		}
+	}
+
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := []*store.MemoRelation{}
+	for rows.Next() {
+		memoRelation := &store.MemoRelation{}
+		if err := rows.Scan(
+			&memoRelation.MemoID,
+			&memoRelation.RelatedMemoID,
+			&memoRelation.Type,
+		); err != nil {
+			return nil, err
+		}
+		list = append(list, memoRelation)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) DeleteMemoRelation(ctx context.Context, delete *store.DeleteMemoRelation) error {
+	where, args := []string{"TRUE"}, []any{}
+	if delete.MemoID != nil {
+		where, args = append(where, "`memo_id` = ?"), append(args, *delete.MemoID)
+	}
+	if delete.RelatedMemoID != nil {
+		where, args = append(where, "`related_memo_id` = ?"), append(args, *delete.RelatedMemoID)
+	}
+	if delete.Type != nil {
+		where, args = append(where, "`type` = ?"), append(args, *delete.Type)
+	}
+	stmt := "DELETE FROM `memo_relation` WHERE " + strings.Join(where, " AND ")
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return err
+	}
+	if _, err = result.RowsAffected(); err != nil {
+		return err
+	}
+	return nil
+}

store/db/mysql/memo_share.go

@@ -0,0 +1,121 @@
+package mysql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateMemoShare(ctx context.Context, create *store.MemoShare) (*store.MemoShare, error) {
+	fields := []string{"`uid`", "`memo_id`", "`creator_id`"}
+	placeholders := []string{"?", "?", "?"}
+	args := []any{create.UID, create.MemoID, create.CreatorID}
+
+	if create.ExpiresTs != nil {
+		fields = append(fields, "`expires_ts`")
+		placeholders = append(placeholders, "?")
+		args = append(args, *create.ExpiresTs)
+	}
+
+	stmt := "INSERT INTO `memo_share` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholders, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	rawID, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+	id := int32(rawID)
+	ms, err := d.GetMemoShare(ctx, &store.FindMemoShare{ID: &id})
+	if err != nil {
+		return nil, err
+	}
+	if ms == nil {
+		return nil, errors.Errorf("failed to create memo share")
+	}
+	return ms, nil
+}
+
+func (d *DB) ListMemoShares(ctx context.Context, find *store.FindMemoShare) ([]*store.MemoShare, error) {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if find.ID != nil {
+		where, args = append(where, "`id` = ?"), append(args, *find.ID)
+	}
+	if find.UID != nil {
+		where, args = append(where, "`uid` = ?"), append(args, *find.UID)
+	}
+	if find.MemoID != nil {
+		where, args = append(where, "`memo_id` = ?"), append(args, *find.MemoID)
+	}
+	if find.CreatorID != nil {
+		where, args = append(where, "`creator_id` = ?"), append(args, *find.CreatorID)
+	}
+
+	rows, err := d.db.QueryContext(ctx, `
+		SELECT
+			id,
+			uid,
+			memo_id,
+			creator_id,
+			created_ts,
+			expires_ts
+		FROM memo_share
+		WHERE `+strings.Join(where, " AND ")+`
+		ORDER BY id ASC`,
+		args...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := []*store.MemoShare{}
+	for rows.Next() {
+		ms := &store.MemoShare{}
+		if err := rows.Scan(
+			&ms.ID,
+			&ms.UID,
+			&ms.MemoID,
+			&ms.CreatorID,
+			&ms.CreatedTs,
+			&ms.ExpiresTs,
+		); err != nil {
+			return nil, err
+		}
+		list = append(list, ms)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return list, nil
+}
+
+func (d *DB) GetMemoShare(ctx context.Context, find *store.FindMemoShare) (*store.MemoShare, error) {
+	list, err := d.ListMemoShares(ctx, find)
+	if err != nil {
+		return nil, err
+	}
+	if len(list) == 0 {
+		return nil, nil
+	}
+	return list[0], nil
+}
+
+func (d *DB) DeleteMemoShare(ctx context.Context, delete *store.DeleteMemoShare) error {
+	where, args := []string{"1 = 1"}, []any{}
+	if delete.ID != nil {
+		where, args = append(where, "`id` = ?"), append(args, *delete.ID)
+	}
+	if delete.UID != nil {
+		where, args = append(where, "`uid` = ?"), append(args, *delete.UID)
+	}
+	_, err := d.db.ExecContext(ctx, "DELETE FROM `memo_share` WHERE "+strings.Join(where, " AND "), args...)
+	return err
+}

store/db/mysql/mysql.go

@@ -0,0 +1,80 @@
+package mysql
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/go-sql-driver/mysql"
+	"github.com/pkg/errors"
+
+	"github.com/usememos/memos/internal/profile"
+	"github.com/usememos/memos/store"
+)
+
+type DB struct {
+	db      *sql.DB
+	profile *profile.Profile
+	config  *mysql.Config
+}
+
+func NewDB(profile *profile.Profile) (store.Driver, error) {
+	// Open MySQL connection with parameter.
+	// multiStatements=true is required for migration.
+	// See more in: https://github.com/go-sql-driver/mysql#multistatements
+	dsn, err := mergeDSN(profile.DSN)
+	if err != nil {
+		return nil, err
+	}
+
+	driver := DB{profile: profile}
+	driver.config, err = mysql.ParseDSN(dsn)
+	if err != nil {
+		return nil, errors.New("Parse DSN error")
+	}
+
+	driver.db, err = sql.Open("mysql", dsn)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to open db: %s", profile.DSN)
+	}
+
+	return &driver, nil
+}
+
+func (d *DB) GetDB() *sql.DB {
+	return d.db
+}
+
+func (d *DB) Close() error {
+	return d.db.Close()
+}
+
+func (d *DB) IsInitialized(ctx context.Context) (bool, error) {
+	var exists bool
+	err := d.db.QueryRowContext(ctx, "SELECT EXISTS (SELECT 1 FROM information_schema.tables WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'memo' AND TABLE_TYPE = 'BASE TABLE')").Scan(&exists)
+	if err != nil {
+		return false, errors.Wrap(err, "failed to check if database is initialized")
+	}
+	return exists, nil
+}
+
+// GetDatabaseSize returns the database size in bytes, or -1 if unavailable.
+func (d *DB) GetDatabaseSize(ctx context.Context) (int64, error) {
+	var size int64
+	const q = `SELECT COALESCE(SUM(data_length + index_length), 0)
+	           FROM information_schema.tables
+	           WHERE table_schema = DATABASE()`
+	if err := d.db.QueryRowContext(ctx, q).Scan(&size); err != nil {
+		return -1, errors.Wrap(err, "failed to query mysql database size")
+	}
+	return size, nil
+}
+
+func mergeDSN(baseDSN string) (string, error) {
+	config, err := mysql.ParseDSN(baseDSN)
+	if err != nil {
+		return "", errors.Wrapf(err, "failed to parse DSN: %s", baseDSN)
+	}
+
+	config.MultiStatements = true
+	return config.FormatDSN(), nil
+}

store/db/mysql/reaction.go

@@ -0,0 +1,113 @@
+package mysql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) UpsertReaction(ctx context.Context, upsert *store.Reaction) (*store.Reaction, error) {
+	fields := []string{"`creator_id`", "`content_id`", "`reaction_type`"}
+	placeholder := []string{"?", "?", "?"}
+	args := []interface{}{upsert.CreatorID, upsert.ContentID, upsert.ReactionType}
+	stmt := "INSERT INTO `reaction` (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholder, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	rawID, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+	id := int32(rawID)
+	reaction, err := d.GetReaction(ctx, &store.FindReaction{ID: &id})
+	if err != nil {
+		return nil, err
+	}
+	if reaction == nil {
+		return nil, errors.Errorf("failed to create reaction")
+	}
+	return reaction, nil
+}
+
+func (d *DB) ListReactions(ctx context.Context, find *store.FindReaction) ([]*store.Reaction, error) {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if find.ID != nil {
+		where, args = append(where, "`id` = ?"), append(args, *find.ID)
+	}
+	if find.CreatorID != nil {
+		where, args = append(where, "`creator_id` = ?"), append(args, *find.CreatorID)
+	}
+	if find.ContentID != nil {
+		where, args = append(where, "`content_id` = ?"), append(args, *find.ContentID)
+	}
+	if len(find.ContentIDList) > 0 {
+		placeholders := make([]string, 0, len(find.ContentIDList))
+		for _, id := range find.ContentIDList {
+			placeholders = append(placeholders, "?")
+			args = append(args, id)
+		}
+		where = append(where, "`content_id` IN ("+strings.Join(placeholders, ",")+")")
+	}
+
+	rows, err := d.db.QueryContext(ctx, `
+		SELECT
+			id,
+			UNIX_TIMESTAMP(created_ts) AS created_ts,
+			creator_id,
+			content_id,
+			reaction_type
+		FROM reaction
+		WHERE `+strings.Join(where, " AND ")+`
+		ORDER BY id ASC`,
+		args...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := []*store.Reaction{}
+	for rows.Next() {
+		reaction := &store.Reaction{}
+		if err := rows.Scan(
+			&reaction.ID,
+			&reaction.CreatedTs,
+			&reaction.CreatorID,
+			&reaction.ContentID,
+			&reaction.ReactionType,
+		); err != nil {
+			return nil, err
+		}
+		list = append(list, reaction)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) GetReaction(ctx context.Context, find *store.FindReaction) (*store.Reaction, error) {
+	list, err := d.ListReactions(ctx, find)
+	if err != nil {
+		return nil, err
+	}
+	if len(list) == 0 {
+		return nil, nil
+	}
+
+	reaction := list[0]
+	return reaction, nil
+}
+
+func (d *DB) DeleteReaction(ctx context.Context, delete *store.DeleteReaction) error {
+	_, err := d.db.ExecContext(ctx, "DELETE FROM `reaction` WHERE `id` = ?", delete.ID)
+	return err
+}

store/db/mysql/user.go

@@ -0,0 +1,194 @@
+package mysql
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateUser(ctx context.Context, create *store.User) (*store.User, error) {
+	fields := []string{"`username`", "`role`", "`email`", "`nickname`", "`password_hash`", "`avatar_url`"}
+	placeholder := []string{"?", "?", "?", "?", "?", "?"}
+	args := []any{create.Username, create.Role, create.Email, create.Nickname, create.PasswordHash, create.AvatarURL}
+
+	stmt := "INSERT INTO user (" + strings.Join(fields, ", ") + ") VALUES (" + strings.Join(placeholder, ", ") + ")"
+	result, err := d.db.ExecContext(ctx, stmt, args...)
+	if err != nil {
+		return nil, err
+	}
+
+	id, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+
+	id32 := int32(id)
+	list, err := d.ListUsers(ctx, &store.FindUser{ID: &id32})
+	if err != nil {
+		return nil, err
+	}
+	if len(list) != 1 {
+		return nil, errors.Errorf("unexpected user count: %d", len(list))
+	}
+
+	return list[0], nil
+}
+
+func (d *DB) UpdateUser(ctx context.Context, update *store.UpdateUser) (*store.User, error) {
+	set, args := []string{}, []any{}
+	if v := update.UpdatedTs; v != nil {
+		set, args = append(set, "`updated_ts` = FROM_UNIXTIME(?)"), append(args, *v)
+	}
+	if v := update.RowStatus; v != nil {
+		set, args = append(set, "`row_status` = ?"), append(args, *v)
+	}
+	if v := update.Username; v != nil {
+		set, args = append(set, "`username` = ?"), append(args, *v)
+	}
+	if v := update.Email; v != nil {
+		set, args = append(set, "`email` = ?"), append(args, *v)
+	}
+	if v := update.Nickname; v != nil {
+		set, args = append(set, "`nickname` = ?"), append(args, *v)
+	}
+	if v := update.AvatarURL; v != nil {
+		set, args = append(set, "`avatar_url` = ?"), append(args, *v)
+	}
+	if v := update.PasswordHash; v != nil {
+		set, args = append(set, "`password_hash` = ?"), append(args, *v)
+	}
+	if v := update.Description; v != nil {
+		set, args = append(set, "`description` = ?"), append(args, *v)
+	}
+	if v := update.Role; v != nil {
+		set, args = append(set, "`role` = ?"), append(args, *v)
+	}
+	args = append(args, update.ID)
+
+	query := "UPDATE `user` SET " + strings.Join(set, ", ") + " WHERE `id` = ?"
+	if _, err := d.db.ExecContext(ctx, query, args...); err != nil {
+		return nil, err
+	}
+
+	user, err := d.GetUser(ctx, &store.FindUser{ID: &update.ID})
+	if err != nil {
+		return nil, err
+	}
+	return user, nil
+}
+
+func (d *DB) ListUsers(ctx context.Context, find *store.FindUser) ([]*store.User, error) {
+	where, args := []string{"1 = 1"}, []any{}
+	orderBy := []string{"`created_ts` DESC", "`row_status` DESC"}
+
+	if len(find.Filters) > 0 {
+		return nil, errors.Errorf("user filters are not supported")
+	}
+
+	if v := find.ID; v != nil {
+		where, args = append(where, "`id` = ?"), append(args, *v)
+	}
+	if len(find.IDList) > 0 {
+		placeholders := make([]string, 0, len(find.IDList))
+		for range find.IDList {
+			placeholders = append(placeholders, "?")
+		}
+		where, args = append(where, fmt.Sprintf("`id` IN (%s)", strings.Join(placeholders, ", "))), append(args, func() []any {
+			list := make([]any, 0, len(find.IDList))
+			for _, id := range find.IDList {
+				list = append(list, id)
+			}
+			return list
+		}()...)
+	}
+	if len(find.UsernameList) > 0 {
+		placeholders := make([]string, 0, len(find.UsernameList))
+		for range find.UsernameList {
+			placeholders = append(placeholders, "?")
+		}
+		where, args = append(where, fmt.Sprintf("`username` IN (%s)", strings.Join(placeholders, ", "))), append(args, func() []any {
+			list := make([]any, 0, len(find.UsernameList))
+			for _, username := range find.UsernameList {
+				list = append(list, username)
+			}
+			return list
+		}()...)
+	}
+	if v := find.RowStatus; v != nil {
+		where, args = append(where, "`row_status` = ?"), append(args, *v)
+	}
+	if v := find.Username; v != nil {
+		where, args = append(where, "`username` = ?"), append(args, *v)
+	}
+	if v := find.Role; v != nil {
+		where, args = append(where, "`role` = ?"), append(args, *v)
+	}
+	if v := find.Email; v != nil {
+		where, args = append(where, "`email` = ?"), append(args, *v)
+	}
+	if v := find.Nickname; v != nil {
+		where, args = append(where, "`nickname` = ?"), append(args, *v)
+	}
+	if v := find.Search; v != nil && strings.TrimSpace(*v) != "" {
+		query := strings.ToLower(strings.TrimSpace(*v))
+		where, args = append(where, "(LOWER(`username`) LIKE ? OR LOWER(`nickname`) LIKE ?)"), append(args, "%"+query+"%", "%"+query+"%")
+		orderBy = []string{
+			"CASE WHEN LOWER(`username`) = ? THEN 0 WHEN LOWER(`username`) LIKE ? THEN 1 WHEN LOWER(`nickname`) LIKE ? THEN 2 ELSE 3 END",
+			"CHAR_LENGTH(`username`) ASC",
+			"`created_ts` DESC",
+			"`row_status` DESC",
+		}
+		args = append(args, query, query+"%", query+"%")
+	}
+	query := "SELECT `id`, `username`, `role`, `email`, `nickname`, `password_hash`, `avatar_url`, `description`, UNIX_TIMESTAMP(`created_ts`), UNIX_TIMESTAMP(`updated_ts`), `row_status` FROM `user` WHERE " + strings.Join(where, " AND ") + " ORDER BY " + strings.Join(orderBy, ", ")
+	if v := find.Limit; v != nil {
+		query += fmt.Sprintf(" LIMIT %d", *v)
+	}
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := make([]*store.User, 0)
+	for rows.Next() {
+		var user store.User
+		if err := rows.Scan(
+			&user.ID,
+			&user.Username,
+			&user.Role,
+			&user.Email,
+			&user.Nickname,
+			&user.PasswordHash,
+			&user.AvatarURL,
+			&user.Description,
+			&user.CreatedTs,
+			&user.UpdatedTs,
+			&user.RowStatus,
+		); err != nil {
+			return nil, err
+		}
+		list = append(list, &user)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return list, nil
+}
+
+func (d *DB) GetUser(ctx context.Context, find *store.FindUser) (*store.User, error) {
+	list, err := d.ListUsers(ctx, find)
+	if err != nil {
+		return nil, err
+	}
+	if len(list) != 1 {
+		return nil, errors.Errorf("unexpected user count: %d", len(list))
+	}
+	return list[0], nil
+}

store/db/mysql/user_delete.go

@@ -0,0 +1,569 @@
+package mysql
+
+import (
+	"context"
+	"database/sql"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/store"
+)
+
+const deleteUserBatchSize = 500
+
+type deleteUserMemoRef struct {
+	ID  int32
+	UID string
+}
+
+type deleteUserTargetSet struct {
+	memos           []deleteUserMemoRef
+	attachments     []*store.Attachment
+	attachmentIDs   []int32
+	userSettingKeys []storepb.UserSetting_Key
+	inboxIDs        []int32
+}
+
+func (d *DB) DeleteUser(ctx context.Context, delete *store.DeleteUser) (*store.DeleteUserResult, error) {
+	tx, err := d.db.BeginTx(ctx, nil)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to begin delete user transaction")
+	}
+	defer func() {
+		_ = tx.Rollback()
+	}()
+
+	targets, err := collectDeleteUserTargets(ctx, tx, delete.ID)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to collect delete user targets")
+	}
+
+	if err := deleteUserTargetsTx(ctx, tx, delete.ID, targets); err != nil {
+		return nil, errors.Wrap(err, "failed to delete user targets")
+	}
+
+	if store.GetDeleteUserFailpoint(ctx) == store.DeleteUserFailpointBeforeCommit {
+		return nil, errors.New("delete user failpoint before commit")
+	}
+
+	if err := tx.Commit(); err != nil {
+		return nil, errors.Wrap(err, "failed to commit delete user transaction")
+	}
+
+	return &store.DeleteUserResult{
+		Attachments:     targets.attachments,
+		UserSettingKeys: targets.userSettingKeys,
+	}, nil
+}
+
+func collectDeleteUserTargets(ctx context.Context, tx *sql.Tx, userID int32) (*deleteUserTargetSet, error) {
+	targets := &deleteUserTargetSet{}
+
+	memos, err := listDeleteUserMemoTree(ctx, tx, userID)
+	if err != nil {
+		return nil, err
+	}
+	targets.memos = memos
+
+	attachments, err := listDeleteUserAttachments(ctx, tx, userID, memoIDsFromRefs(memos))
+	if err != nil {
+		return nil, err
+	}
+	targets.attachments = attachments
+	targets.attachmentIDs = attachmentIDsFromList(attachments)
+
+	userSettingKeys, err := listDeleteUserSettingKeys(ctx, tx, userID)
+	if err != nil {
+		return nil, err
+	}
+	targets.userSettingKeys = userSettingKeys
+
+	inboxIDs, err := listDeleteUserInboxIDs(ctx, tx, userID, memoIDSetFromRefs(memos))
+	if err != nil {
+		return nil, err
+	}
+	targets.inboxIDs = inboxIDs
+
+	return targets, nil
+}
+
+func deleteUserTargetsTx(ctx context.Context, tx *sql.Tx, userID int32, targets *deleteUserTargetSet) error {
+	memoIDs := memoIDsFromRefs(targets.memos)
+	contentIDs := memoContentIDsFromRefs(targets.memos)
+
+	if err := deleteReactionsByContentIDsTx(ctx, tx, contentIDs); err != nil {
+		return err
+	}
+	if err := deleteAttachmentsByIDsTx(ctx, tx, targets.attachmentIDs); err != nil {
+		return err
+	}
+	if err := deleteReactionsByCreatorTx(ctx, tx, userID); err != nil {
+		return err
+	}
+	if err := deleteMemoSharesTx(ctx, tx, userID, memoIDs); err != nil {
+		return err
+	}
+	if err := deleteInboxesByIDsTx(ctx, tx, targets.inboxIDs); err != nil {
+		return err
+	}
+	if err := deleteUserIdentitiesTx(ctx, tx, userID); err != nil {
+		return err
+	}
+	if err := deleteUserSettingsTx(ctx, tx, userID); err != nil {
+		return err
+	}
+	if err := deleteMemoRelationsTx(ctx, tx, memoIDs); err != nil {
+		return err
+	}
+	if err := deleteMemosTx(ctx, tx, memoIDs); err != nil {
+		return err
+	}
+	if err := deleteUserRowTx(ctx, tx, userID); err != nil {
+		return err
+	}
+	return nil
+}
+
+func listDeleteUserMemoTree(ctx context.Context, tx *sql.Tx, userID int32) ([]deleteUserMemoRef, error) {
+	return listDeleteUserMemoTreeIterative(ctx, tx, userID)
+}
+
+func listDeleteUserMemoTreeIterative(ctx context.Context, tx *sql.Tx, userID int32) ([]deleteUserMemoRef, error) {
+	roots, err := queryDeleteUserMemoRefs(ctx, tx, `
+		SELECT id, uid
+		FROM memo
+		WHERE creator_id = `+deleteUserPlaceholder(1), userID)
+	if err != nil {
+		return nil, err
+	}
+
+	memos := make([]deleteUserMemoRef, 0, len(roots))
+	seen := make(map[int32]struct{})
+	frontier := make([]int32, 0, len(roots))
+	for _, memo := range roots {
+		if _, exists := seen[memo.ID]; exists {
+			continue
+		}
+		seen[memo.ID] = struct{}{}
+		memos = append(memos, memo)
+		frontier = append(frontier, memo.ID)
+	}
+
+	for len(frontier) > 0 {
+		currentFrontier := frontier
+		nextFrontier := make([]int32, 0)
+		for _, batch := range deleteUserBatches(currentFrontier, deleteUserBatchSize) {
+			clause, args := deleteUserInClause(1, batch)
+			children, err := queryDeleteUserMemoRefs(ctx, tx, `
+				SELECT child.id, child.uid
+				FROM memo child
+				JOIN memo_relation rel ON rel.memo_id = child.id AND rel.type = 'COMMENT'
+				WHERE rel.related_memo_id IN `+clause, args...)
+			if err != nil {
+				return nil, err
+			}
+
+			for _, child := range children {
+				if _, exists := seen[child.ID]; exists {
+					continue
+				}
+				seen[child.ID] = struct{}{}
+				memos = append(memos, child)
+				nextFrontier = append(nextFrontier, child.ID)
+			}
+		}
+		frontier = nextFrontier
+	}
+
+	return memos, nil
+}
+
+func queryDeleteUserMemoRefs(ctx context.Context, tx *sql.Tx, query string, args ...any) ([]deleteUserMemoRef, error) {
+	rows, err := tx.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	memos := make([]deleteUserMemoRef, 0)
+	for rows.Next() {
+		var memo deleteUserMemoRef
+		if err := rows.Scan(&memo.ID, &memo.UID); err != nil {
+			return nil, err
+		}
+		memos = append(memos, memo)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return memos, nil
+}
+
+func listDeleteUserAttachments(ctx context.Context, tx *sql.Tx, userID int32, memoIDs []int32) ([]*store.Attachment, error) {
+	attachments := make([]*store.Attachment, 0)
+	seen := make(map[int32]struct{})
+	if err := appendDeleteUserAttachments(ctx, tx, `
+		SELECT
+			id,
+			uid,
+			creator_id,
+			memo_id,
+			storage_type,
+			reference,
+			payload
+		FROM attachment
+		WHERE creator_id = `+deleteUserPlaceholder(1), []any{userID}, seen, &attachments); err != nil {
+		return nil, err
+	}
+
+	for _, batch := range deleteUserBatches(memoIDs, deleteUserBatchSize) {
+		clause, args := deleteUserInClause(1, batch)
+		if err := appendDeleteUserAttachments(ctx, tx, `
+			SELECT
+				id,
+				uid,
+				creator_id,
+				memo_id,
+				storage_type,
+				reference,
+				payload
+			FROM attachment
+			WHERE memo_id IN `+clause, args, seen, &attachments); err != nil {
+			return nil, err
+		}
+	}
+
+	return attachments, nil
+}
+
+func appendDeleteUserAttachments(ctx context.Context, tx *sql.Tx, query string, args []any, seen map[int32]struct{}, attachments *[]*store.Attachment) error {
+	rows, err := tx.QueryContext(ctx, query, args...)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		attachment := &store.Attachment{}
+		var memoID sql.NullInt32
+		var storageType string
+		var payloadBytes []byte
+		if err := rows.Scan(&attachment.ID, &attachment.UID, &attachment.CreatorID, &memoID, &storageType, &attachment.Reference, &payloadBytes); err != nil {
+			return err
+		}
+		if _, exists := seen[attachment.ID]; exists {
+			continue
+		}
+		seen[attachment.ID] = struct{}{}
+		if memoID.Valid {
+			attachment.MemoID = &memoID.Int32
+		}
+		attachment.StorageType = storepb.AttachmentStorageType(storepb.AttachmentStorageType_value[storageType])
+		payload := &storepb.AttachmentPayload{}
+		if len(payloadBytes) > 0 {
+			if err := protojsonUnmarshaler.Unmarshal(payloadBytes, payload); err != nil {
+				return err
+			}
+		}
+		attachment.Payload = payload
+		*attachments = append(*attachments, attachment)
+	}
+	return rows.Err()
+}
+
+func listDeleteUserSettingKeys(ctx context.Context, tx *sql.Tx, userID int32) ([]storepb.UserSetting_Key, error) {
+	rows, err := tx.QueryContext(ctx, deleteUserSettingKeysQuery(), userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	keys := make([]storepb.UserSetting_Key, 0)
+	for rows.Next() {
+		var keyString string
+		if err := rows.Scan(&keyString); err != nil {
+			return nil, err
+		}
+		key := storepb.UserSetting_Key(storepb.UserSetting_Key_value[keyString])
+		keys = append(keys, key)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return keys, nil
+}
+
+func deleteUserSettingKeysQuery() string {
+	return "SELECT `key` FROM `user_setting` WHERE user_id = " + deleteUserPlaceholder(1)
+}
+
+func listDeleteUserInboxIDs(ctx context.Context, tx *sql.Tx, userID int32, memoIDSet map[int32]struct{}) ([]int32, error) {
+	directIDs, err := listDeleteUserDirectInboxIDs(ctx, tx, userID)
+	if err != nil {
+		return nil, err
+	}
+	inboxIDs := append([]int32{}, directIDs...)
+	if len(memoIDSet) == 0 {
+		return inboxIDs, nil
+	}
+
+	memoIDs, err := listDeleteUserMemoReferencedInboxIDs(ctx, tx, userID, memoIDSet)
+	if err != nil {
+		return nil, err
+	}
+	return append(inboxIDs, memoIDs...), nil
+}
+
+func listDeleteUserDirectInboxIDs(ctx context.Context, tx *sql.Tx, userID int32) ([]int32, error) {
+	rows, err := tx.QueryContext(ctx, `
+		SELECT id
+		FROM inbox
+		WHERE sender_id = `+deleteUserPlaceholder(1)+`
+			OR receiver_id = `+deleteUserPlaceholder(2), userID, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	inboxIDs := make([]int32, 0)
+	for rows.Next() {
+		var inboxID int32
+		if err := rows.Scan(&inboxID); err != nil {
+			return nil, err
+		}
+		inboxIDs = append(inboxIDs, inboxID)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return inboxIDs, nil
+}
+
+func listDeleteUserMemoReferencedInboxIDs(ctx context.Context, tx *sql.Tx, userID int32, memoIDSet map[int32]struct{}) ([]int32, error) {
+	rows, err := tx.QueryContext(ctx, `
+		SELECT id, message
+		FROM inbox
+		WHERE sender_id <> `+deleteUserPlaceholder(1)+`
+			AND receiver_id <> `+deleteUserPlaceholder(2), userID, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	inboxIDs := make([]int32, 0)
+	for rows.Next() {
+		var (
+			inboxID    int32
+			messageRaw []byte
+		)
+		if err := rows.Scan(&inboxID, &messageRaw); err != nil {
+			return nil, err
+		}
+		if len(messageRaw) == 0 {
+			continue
+		}
+
+		message := &storepb.InboxMessage{}
+		if err := protojsonUnmarshaler.Unmarshal(messageRaw, message); err != nil {
+			return nil, err
+		}
+		if inboxMessageTouchesMemoSet(message, memoIDSet) {
+			inboxIDs = append(inboxIDs, inboxID)
+		}
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return inboxIDs, nil
+}
+
+func inboxMessageTouchesMemoSet(message *storepb.InboxMessage, memoIDSet map[int32]struct{}) bool {
+	if message == nil {
+		return false
+	}
+
+	switch message.Type {
+	case storepb.InboxMessage_MEMO_COMMENT:
+		payload := message.GetMemoComment()
+		if payload == nil {
+			return false
+		}
+		return memoIDInSet(payload.MemoId, memoIDSet) || memoIDInSet(payload.RelatedMemoId, memoIDSet)
+	case storepb.InboxMessage_MEMO_MENTION:
+		payload := message.GetMemoMention()
+		if payload == nil {
+			return false
+		}
+		return memoIDInSet(payload.MemoId, memoIDSet) || memoIDInSet(payload.RelatedMemoId, memoIDSet)
+	default:
+		return false
+	}
+}
+
+func memoIDInSet(id int32, memoIDSet map[int32]struct{}) bool {
+	if id == 0 {
+		return false
+	}
+	_, exists := memoIDSet[id]
+	return exists
+}
+
+func deleteReactionsByContentIDsTx(ctx context.Context, tx *sql.Tx, contentIDs []string) error {
+	for _, batch := range deleteUserBatches(contentIDs, deleteUserBatchSize) {
+		clause, args := deleteUserInClause(1, batch)
+		if _, err := tx.ExecContext(ctx, `DELETE FROM reaction WHERE content_id IN `+clause, args...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func deleteAttachmentsByIDsTx(ctx context.Context, tx *sql.Tx, attachmentIDs []int32) error {
+	for _, batch := range deleteUserBatches(attachmentIDs, deleteUserBatchSize) {
+		clause, args := deleteUserInClause(1, batch)
+		if _, err := tx.ExecContext(ctx, `DELETE FROM attachment WHERE id IN `+clause, args...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func deleteReactionsByCreatorTx(ctx context.Context, tx *sql.Tx, userID int32) error {
+	_, err := tx.ExecContext(ctx, `DELETE FROM reaction WHERE creator_id = `+deleteUserPlaceholder(1), userID)
+	return err
+}
+
+func deleteMemoSharesTx(ctx context.Context, tx *sql.Tx, userID int32, memoIDs []int32) error {
+	if _, err := tx.ExecContext(ctx, `DELETE FROM memo_share WHERE creator_id = `+deleteUserPlaceholder(1), userID); err != nil {
+		return err
+	}
+	for _, batch := range deleteUserBatches(memoIDs, deleteUserBatchSize) {
+		clause, args := deleteUserInClause(1, batch)
+		if _, err := tx.ExecContext(ctx, `DELETE FROM memo_share WHERE memo_id IN `+clause, args...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func deleteInboxesByIDsTx(ctx context.Context, tx *sql.Tx, inboxIDs []int32) error {
+	for _, batch := range deleteUserBatches(inboxIDs, deleteUserBatchSize) {
+		clause, args := deleteUserInClause(1, batch)
+		if _, err := tx.ExecContext(ctx, `DELETE FROM inbox WHERE id IN `+clause, args...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func deleteUserIdentitiesTx(ctx context.Context, tx *sql.Tx, userID int32) error {
+	_, err := tx.ExecContext(ctx, `DELETE FROM user_identity WHERE user_id = `+deleteUserPlaceholder(1), userID)
+	return err
+}
+
+func deleteUserSettingsTx(ctx context.Context, tx *sql.Tx, userID int32) error {
+	_, err := tx.ExecContext(ctx, "DELETE FROM `user_setting` WHERE user_id = "+deleteUserPlaceholder(1), userID)
+	return err
+}
+
+func deleteMemoRelationsTx(ctx context.Context, tx *sql.Tx, memoIDs []int32) error {
+	for _, batch := range deleteUserBatches(memoIDs, deleteUserBatchSize) {
+		memoClause, args := deleteUserInClause(1, batch)
+		relatedClause, relatedArgs := deleteUserInClause(len(args)+1, batch)
+		query := `DELETE FROM memo_relation WHERE memo_id IN ` + memoClause + ` OR related_memo_id IN ` + relatedClause
+		args = append(args, relatedArgs...)
+		if _, err := tx.ExecContext(ctx, query, args...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func deleteMemosTx(ctx context.Context, tx *sql.Tx, memoIDs []int32) error {
+	for _, batch := range deleteUserBatches(memoIDs, deleteUserBatchSize) {
+		clause, args := deleteUserInClause(1, batch)
+		if _, err := tx.ExecContext(ctx, `DELETE FROM memo WHERE id IN `+clause, args...); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func deleteUserRowTx(ctx context.Context, tx *sql.Tx, userID int32) error {
+	_, err := tx.ExecContext(ctx, "DELETE FROM `user` WHERE id = "+deleteUserPlaceholder(1), userID)
+	return err
+}
+
+func deleteUserPlaceholder(_ int) string {
+	return "?"
+}
+
+func deleteUserInClause[T any](start int, values []T) (string, []any) {
+	placeholders := make([]string, 0, len(values))
+	args := make([]any, 0, len(values))
+	for i, value := range values {
+		placeholders = append(placeholders, deleteUserPlaceholder(start+i))
+		args = append(args, value)
+	}
+	return "(" + strings.Join(placeholders, ", ") + ")", args
+}
+
+func deleteUserBatches[T any](values []T, size int) [][]T {
+	if len(values) == 0 {
+		return nil
+	}
+	if size <= 0 {
+		size = len(values)
+	}
+
+	batches := make([][]T, 0, (len(values)+size-1)/size)
+	for start := 0; start < len(values); start += size {
+		end := start + size
+		if end > len(values) {
+			end = len(values)
+		}
+		batches = append(batches, values[start:end])
+	}
+	return batches
+}
+
+func memoIDsFromRefs(memos []deleteUserMemoRef) []int32 {
+	ids := make([]int32, 0, len(memos))
+	for _, memo := range memos {
+		ids = append(ids, memo.ID)
+	}
+	return ids
+}
+
+func memoIDSetFromRefs(memos []deleteUserMemoRef) map[int32]struct{} {
+	idSet := make(map[int32]struct{}, len(memos))
+	for _, memo := range memos {
+		idSet[memo.ID] = struct{}{}
+	}
+	return idSet
+}
+
+func memoContentIDsFromRefs(memos []deleteUserMemoRef) []string {
+	contentIDs := make([]string, 0, len(memos))
+	for _, memo := range memos {
+		contentIDs = append(contentIDs, "memos/"+memo.UID)
+	}
+	return contentIDs
+}
+
+func attachmentIDsFromList(attachments []*store.Attachment) []int32 {
+	ids := make([]int32, 0, len(attachments))
+	for _, attachment := range attachments {
+		if attachment == nil {
+			continue
+		}
+		ids = append(ids, attachment.ID)
+	}
+	return ids
+}

store/db/mysql/user_delete_test.go

@@ -0,0 +1,11 @@
+package mysql
+
+import "testing"
+
+func TestDeleteUserSettingKeysQueryQuotesReservedKey(t *testing.T) {
+	got := deleteUserSettingKeysQuery()
+	want := "SELECT `key` FROM `user_setting` WHERE user_id = ?"
+	if got != want {
+		t.Fatalf("deleteUserSettingKeysQuery() = %q, want %q", got, want)
+	}
+}

store/db/mysql/user_identity.go

@@ -0,0 +1,107 @@
+package mysql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) CreateUserIdentity(ctx context.Context, create *store.UserIdentity) (*store.UserIdentity, error) {
+	stmt := "INSERT INTO `user_identity` (`user_id`, `provider`, `extern_uid`) VALUES (?, ?, ?)"
+	result, err := d.db.ExecContext(ctx, stmt, create.UserID, create.Provider, create.ExternUID)
+	if err != nil {
+		return nil, err
+	}
+
+	rawID, err := result.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+	id := int32(rawID)
+	list, err := d.ListUserIdentities(ctx, &store.FindUserIdentity{ID: &id})
+	if err != nil {
+		return nil, err
+	}
+	if len(list) == 0 {
+		return nil, errors.Errorf("failed to create user identity")
+	}
+	return list[0], nil
+}
+
+func (d *DB) ListUserIdentities(ctx context.Context, find *store.FindUserIdentity) ([]*store.UserIdentity, error) {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if find.ID != nil {
+		where, args = append(where, "`id` = ?"), append(args, *find.ID)
+	}
+	if find.UserID != nil {
+		where, args = append(where, "`user_id` = ?"), append(args, *find.UserID)
+	}
+	if find.Provider != nil {
+		where, args = append(where, "`provider` = ?"), append(args, *find.Provider)
+	}
+	if find.ExternUID != nil {
+		where, args = append(where, "`extern_uid` = ?"), append(args, *find.ExternUID)
+	}
+
+	rows, err := d.db.QueryContext(ctx, `
+		SELECT
+			id,
+			user_id,
+			provider,
+			extern_uid,
+			created_ts,
+			updated_ts
+		FROM user_identity
+		WHERE `+strings.Join(where, " AND ")+`
+		ORDER BY id ASC`,
+		args...,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	list := []*store.UserIdentity{}
+	for rows.Next() {
+		ui := &store.UserIdentity{}
+		if err := rows.Scan(
+			&ui.ID,
+			&ui.UserID,
+			&ui.Provider,
+			&ui.ExternUID,
+			&ui.CreatedTs,
+			&ui.UpdatedTs,
+		); err != nil {
+			return nil, err
+		}
+		list = append(list, ui)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return list, nil
+}
+
+func (d *DB) DeleteUserIdentities(ctx context.Context, delete *store.DeleteUserIdentity) error {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if delete.ID != nil {
+		where, args = append(where, "`id` = ?"), append(args, *delete.ID)
+	}
+	if delete.UserID != nil {
+		where, args = append(where, "`user_id` = ?"), append(args, *delete.UserID)
+	}
+	if delete.Provider != nil {
+		where, args = append(where, "`provider` = ?"), append(args, *delete.Provider)
+	}
+
+	if _, err := d.db.ExecContext(ctx, "DELETE FROM `user_identity` WHERE "+strings.Join(where, " AND "), args...); err != nil {
+		return err
+	}
+	return nil
+}

store/db/mysql/user_setting.go

@@ -0,0 +1,109 @@
+package mysql
+
+import (
+	"context"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	storepb "github.com/usememos/memos/proto/gen/store"
+	"github.com/usememos/memos/store"
+)
+
+func (d *DB) UpsertUserSetting(ctx context.Context, upsert *store.UserSetting) (*store.UserSetting, error) {
+	stmt := "INSERT INTO `user_setting` (`user_id`, `key`, `value`) VALUES (?, ?, ?) ON DUPLICATE KEY UPDATE `value` = ?"
+	if _, err := d.db.ExecContext(ctx, stmt, upsert.UserID, upsert.Key.String(), upsert.Value, upsert.Value); err != nil {
+		return nil, err
+	}
+	return upsert, nil
+}
+
+func (d *DB) ListUserSettings(ctx context.Context, find *store.FindUserSetting) ([]*store.UserSetting, error) {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if v := find.Key; v != storepb.UserSetting_KEY_UNSPECIFIED {
+		where, args = append(where, "`key` = ?"), append(args, v.String())
+	}
+	if v := find.UserID; v != nil {
+		where, args = append(where, "`user_id` = ?"), append(args, *find.UserID)
+	}
+
+	query := "SELECT `user_id`, `key`, `value` FROM `user_setting` WHERE " + strings.Join(where, " AND ")
+	rows, err := d.db.QueryContext(ctx, query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	userSettingList := make([]*store.UserSetting, 0)
+	for rows.Next() {
+		userSetting := &store.UserSetting{}
+		var keyString string
+		if err := rows.Scan(
+			&userSetting.UserID,
+			&keyString,
+			&userSetting.Value,
+		); err != nil {
+			return nil, err
+		}
+		userSetting.Key = storepb.UserSetting_Key(storepb.UserSetting_Key_value[keyString])
+		userSettingList = append(userSettingList, userSetting)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return userSettingList, nil
+}
+
+func (d *DB) DeleteUserSettings(ctx context.Context, delete *store.DeleteUserSetting) error {
+	where, args := []string{"1 = 1"}, []any{}
+
+	if v := delete.Key; v != storepb.UserSetting_KEY_UNSPECIFIED {
+		where, args = append(where, "`key` = ?"), append(args, v.String())
+	}
+	if v := delete.UserID; v != nil {
+		where, args = append(where, "`user_id` = ?"), append(args, *v)
+	}
+
+	if _, err := d.db.ExecContext(ctx, "DELETE FROM `user_setting` WHERE "+strings.Join(where, " AND "), args...); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (d *DB) GetUserByPATHash(ctx context.Context, tokenHash string) (*store.PATQueryResult, error) {
+	query := `
+		SELECT
+			user_id,
+			value
+		FROM user_setting
+		WHERE ` + "`key`" + ` = 'PERSONAL_ACCESS_TOKENS'
+		  AND JSON_SEARCH(value, 'one', ?, NULL, '$.tokens[*].tokenHash') IS NOT NULL
+	`
+
+	var userID int32
+	var tokensJSON string
+
+	err := d.db.QueryRowContext(ctx, query, tokenHash).Scan(&userID, &tokensJSON)
+	if err != nil {
+		return nil, err
+	}
+
+	patsUserSetting := &storepb.PersonalAccessTokensUserSetting{}
+	if err := protojsonUnmarshaler.Unmarshal([]byte(tokensJSON), patsUserSetting); err != nil {
+		return nil, err
+	}
+
+	for _, pat := range patsUserSetting.Tokens {
+		if pat.TokenHash == tokenHash {
+			return &store.PATQueryResult{
+				UserID: userID,
+				PAT:    pat,
+			}, nil
+		}
+	}
+
+	return nil, errors.New("PAT not found")
+}