diff --git a/packages/common/infra/src/sync/indexer/document.ts b/packages/common/infra/src/sync/indexer/document.ts
index 5983800b33..d21397e8d3 100644
--- a/packages/common/infra/src/sync/indexer/document.ts
+++ b/packages/common/infra/src/sync/indexer/document.ts
@@ -40,7 +40,10 @@ export class Document<S extends Schema = any> {
       }
     } else {
       for (const key in map) {
-        doc.insert(key, map[key] as string | string[]);
+        if (map[key] === undefined) {
+          continue;
+        }
+        doc.insert(key, map[key]);
       }
     }
     return doc;
diff --git a/packages/common/infra/src/sync/indexer/impl/indexeddb/data-struct.ts b/packages/common/infra/src/sync/indexer/impl/indexeddb/data-struct.ts
index f418bd0674..2fd5c031a3 100644
--- a/packages/common/infra/src/sync/indexer/impl/indexeddb/data-struct.ts
+++ b/packages/common/infra/src/sync/indexer/impl/indexeddb/data-struct.ts
@@ -1,3 +1,4 @@
+import { DebugLogger } from '@affine/debug';
 import {
   type DBSchema,
   type IDBPDatabase,
@@ -25,6 +26,8 @@ import {
 } from './inverted-index';
 import { Match } from './match';
 
+const logger = new DebugLogger('indexeddb');
+
 export interface IndexDB extends DBSchema {
   kvMetadata: {
     key: string;
@@ -75,14 +78,19 @@ export class DataStruct {
 
   constructor(
     readonly databaseName: string,
-    schema: Schema
+    readonly schema: Schema
   ) {
     for (const [key, type] of Object.entries(schema)) {
-      if (type === 'String') {
+      const typeInfo = typeof type === 'string' ? { type } : type;
+      if (typeInfo.index === false) {
+        // If index is false, we don't need to create an inverted index for this field.
+        continue;
+      }
+      if (typeInfo.type === 'String') {
         this.invertedIndex.set(key, new StringInvertedIndex(key));
-      } else if (type === 'Integer') {
+      } else if (typeInfo.type === 'Integer') {
         this.invertedIndex.set(key, new IntegerInvertedIndex(key));
-      } else if (type === 'FullText') {
+      } else if (typeInfo.type === 'FullText') {
         this.invertedIndex.set(key, new FullTextInvertedIndex(key));
       } else if (type === 'Boolean') {
         this.invertedIndex.set(key, new BooleanInvertedIndex(key));
@@ -102,17 +110,29 @@ export class DataStruct {
       throw new Error('Document already exists');
     }
 
+    const dataMap = new Map();
+
+    for (const [key, values] of document.fields) {
+      const type = this.schema[key as string];
+      if (!type) {
+        return;
+      }
+      const typeInfo = typeof type === 'string' ? { type } : type;
+      if (typeInfo.store !== false) {
+        // If store is false, the field will not be stored
+        dataMap.set(key, values);
+      }
+    }
+
     const nid = await trx.objectStore('records').add({
       id: document.id,
-      data: new Map(document.fields as Map<string, string[]>),
+      data: dataMap,
     });
 
     for (const [key, values] of document.fields) {
       const iidx = this.invertedIndex.get(key as string);
       if (!iidx) {
-        throw new Error(
-          `Inverted index '${key.toString()}' not found, document not match schema`
-        );
+        return;
       }
       await iidx.insert(trx, nid, values);
     }
@@ -164,7 +184,7 @@ export class DataStruct {
     if (query.type === 'match') {
       const iidx = this.invertedIndex.get(query.field as string);
       if (!iidx) {
-        throw new Error(`Field '${query.field as string}' not found`);
+        return new Match();
       }
       return await iidx.match(trx, query.match);
     } else if (query.type === 'boolean') {
@@ -187,7 +207,7 @@ export class DataStruct {
     } else if (query.type === 'exists') {
       const iidx = this.invertedIndex.get(query.field as string);
       if (!iidx) {
-        throw new Error(`Field '${query.field as string}' not found`);
+        return new Match();
       }
       return await iidx.all(trx);
     }
@@ -217,31 +237,41 @@ export class DataStruct {
     query: Query<any>,
     options: SearchOptions<any>
   ): Promise<SearchResult<any, any>> {
-    const pagination = {
-      skip: options.pagination?.skip ?? 0,
-      limit: options.pagination?.limit ?? 100,
-    };
+    const startTime = performance.now();
+    try {
+      const pagination = {
+        skip: options.pagination?.skip ?? 0,
+        limit: options.pagination?.limit ?? 100,
+      };
 
-    const match = await this.query(trx, query);
+      const match = await this.query(trx, query);
 
-    const nids = match
-      .toArray()
-      .slice(pagination.skip, pagination.skip + pagination.limit);
+      const nids = match
+        .toArray()
+        .slice(pagination.skip, pagination.skip + pagination.limit);
 
-    const nodes = [];
-    for (const nid of nids) {
-      nodes.push(await this.resultNode(trx, match, nid, options));
+      const nodes = [];
+      for (const nid of nids) {
+        nodes.push(await this.resultNode(trx, match, nid, options));
+      }
+
+      return {
+        pagination: {
+          count: match.size(),
+          hasMore: match.size() > pagination.limit + pagination.skip,
+          limit: pagination.limit,
+          skip: pagination.skip,
+        },
+        nodes: nodes,
+      };
+    } finally {
+      logger.debug(
+        `[indexer ${this.databaseName}] search`,
+        performance.now() - startTime,
+        'ms',
+        query
+      );
     }
-
-    return {
-      pagination: {
-        count: match.size(),
-        hasMore: match.size() > pagination.limit + pagination.skip,
-        limit: pagination.limit,
-        skip: pagination.skip,
-      },
-      nodes: nodes,
-    };
   }
 
   async aggregate(
@@ -250,95 +280,105 @@ export class DataStruct {
     field: string,
     options: AggregateOptions<any>
   ): Promise<AggregateResult<any, any>> {
-    const pagination = {
-      skip: options.pagination?.skip ?? 0,
-      limit: options.pagination?.limit ?? 100,
-    };
+    const startTime = performance.now();
+    try {
+      const pagination = {
+        skip: options.pagination?.skip ?? 0,
+        limit: options.pagination?.limit ?? 100,
+      };
 
-    const hitPagination = options.hits
-      ? {
-          skip: options.hits.pagination?.skip ?? 0,
-          limit: options.hits.pagination?.limit ?? 3,
-        }
-      : {
-          skip: 0,
-          limit: 0,
-        };
+      const hitPagination = options.hits
+        ? {
+            skip: options.hits.pagination?.skip ?? 0,
+            limit: options.hits.pagination?.limit ?? 3,
+          }
+        : {
+            skip: 0,
+            limit: 0,
+          };
 
-    const match = await this.query(trx, query);
+      const match = await this.query(trx, query);
 
-    const nids = match.toArray();
+      const nids = match.toArray();
 
-    const buckets: {
-      key: string;
-      nids: number[];
-      hits: SearchResult<any, any>['nodes'];
-    }[] = [];
+      const buckets: {
+        key: string;
+        nids: number[];
+        hits: SearchResult<any, any>['nodes'];
+      }[] = [];
 
-    for (const nid of nids) {
-      const values = (await trx.objectStore('records').get(nid))?.data.get(
-        field
-      );
-      for (const value of values ?? []) {
-        let bucket;
-        let bucketIndex = buckets.findIndex(b => b.key === value);
-        if (bucketIndex === -1) {
-          bucket = { key: value, nids: [], hits: [] };
-          buckets.push(bucket);
-          bucketIndex = buckets.length - 1;
-        } else {
-          bucket = buckets[bucketIndex];
-        }
+      for (const nid of nids) {
+        const values = (await trx.objectStore('records').get(nid))?.data.get(
+          field
+        );
+        for (const value of values ?? []) {
+          let bucket;
+          let bucketIndex = buckets.findIndex(b => b.key === value);
+          if (bucketIndex === -1) {
+            bucket = { key: value, nids: [], hits: [] };
+            buckets.push(bucket);
+            bucketIndex = buckets.length - 1;
+          } else {
+            bucket = buckets[bucketIndex];
+          }
 
-        if (
-          bucketIndex >= pagination.skip &&
-          bucketIndex < pagination.skip + pagination.limit
-        ) {
-          bucket.nids.push(nid);
           if (
-            bucket.nids.length - 1 >= hitPagination.skip &&
-            bucket.nids.length - 1 < hitPagination.skip + hitPagination.limit
+            bucketIndex >= pagination.skip &&
+            bucketIndex < pagination.skip + pagination.limit
           ) {
-            bucket.hits.push(
-              await this.resultNode(trx, match, nid, options.hits ?? {})
-            );
+            bucket.nids.push(nid);
+            if (
+              bucket.nids.length - 1 >= hitPagination.skip &&
+              bucket.nids.length - 1 < hitPagination.skip + hitPagination.limit
+            ) {
+              bucket.hits.push(
+                await this.resultNode(trx, match, nid, options.hits ?? {})
+              );
+            }
           }
         }
       }
+
+      return {
+        buckets: buckets
+          .slice(pagination.skip, pagination.skip + pagination.limit)
+          .map(bucket => {
+            const result = {
+              key: bucket.key,
+              score: match.getScore(bucket.nids[0]),
+              count: bucket.nids.length,
+            } as AggregateResult<any, any>['buckets'][number];
+
+            if (options.hits) {
+              (result as any).hits = {
+                pagination: {
+                  count: bucket.nids.length,
+                  hasMore:
+                    bucket.nids.length >
+                    hitPagination.limit + hitPagination.skip,
+                  limit: hitPagination.limit,
+                  skip: hitPagination.skip,
+                },
+                nodes: bucket.hits,
+              } as SearchResult<any, any>;
+            }
+
+            return result;
+          }),
+        pagination: {
+          count: buckets.length,
+          hasMore: buckets.length > pagination.limit + pagination.skip,
+          limit: pagination.limit,
+          skip: pagination.skip,
+        },
+      };
+    } finally {
+      logger.debug(
+        `[indexer ${this.databaseName}] aggregate`,
+        performance.now() - startTime,
+        'ms'
+      );
     }
-
-    return {
-      buckets: buckets
-        .slice(pagination.skip, pagination.skip + pagination.limit)
-        .map(bucket => {
-          const result = {
-            key: bucket.key,
-            score: match.getScore(bucket.nids[0]),
-            count: bucket.nids.length,
-          } as AggregateResult<any, any>['buckets'][number];
-
-          if (options.hits) {
-            (result as any).hits = {
-              pagination: {
-                count: bucket.nids.length,
-                hasMore:
-                  bucket.nids.length > hitPagination.limit + hitPagination.skip,
-                limit: hitPagination.limit,
-                skip: hitPagination.skip,
-              },
-              nodes: bucket.hits,
-            } as SearchResult<any, any>;
-          }
-
-          return result;
-        }),
-      pagination: {
-        count: buckets.length,
-        hasMore: buckets.length > pagination.limit + pagination.skip,
-        limit: pagination.limit,
-        skip: pagination.skip,
-      },
-    };
   }
 
   async getAll(
diff --git a/packages/common/infra/src/sync/indexer/impl/indexeddb/inverted-index.ts b/packages/common/infra/src/sync/indexer/impl/indexeddb/inverted-index.ts
index d94393ae1a..4230e18dfc 100644
--- a/packages/common/infra/src/sync/indexer/impl/indexeddb/inverted-index.ts
+++ b/packages/common/infra/src/sync/indexer/impl/indexeddb/inverted-index.ts
@@ -21,7 +21,11 @@ export interface InvertedIndex {
 }
 
 export class StringInvertedIndex implements InvertedIndex {
-  constructor(readonly fieldKey: string) {}
+  constructor(
+    readonly fieldKey: string,
+    readonly index: boolean = true,
+    readonly store: boolean = true
+  ) {}
 
   async match(trx: DataStructROTransaction, term: string): Promise<Match> {
     const objs = await trx
@@ -69,7 +73,11 @@ export class StringInvertedIndex implements InvertedIndex {
 }
 
 export class IntegerInvertedIndex implements InvertedIndex {
-  constructor(readonly fieldKey: string) {}
+  constructor(
+    readonly fieldKey: string,
+    readonly index: boolean = true,
+    readonly store: boolean = true
+  ) {}
 
   async match(trx: DataStructROTransaction, term: string): Promise<Match> {
     const objs = await trx
@@ -118,7 +126,11 @@ export class IntegerInvertedIndex implements InvertedIndex {
 }
 
 export class BooleanInvertedIndex implements InvertedIndex {
-  constructor(readonly fieldKey: string) {}
+  constructor(
+    readonly fieldKey: string,
+    readonly index: boolean = true,
+    readonly store: boolean = true
+  ) {}
 
   // eslint-disable-next-line sonarjs/no-identical-functions
   async all(trx: DataStructROTransaction): Promise<Match> {
@@ -172,7 +184,11 @@ export class BooleanInvertedIndex implements InvertedIndex {
 }
 
 export class FullTextInvertedIndex implements InvertedIndex {
-  constructor(readonly fieldKey: string) {}
+  constructor(
+    readonly fieldKey: string,
+    readonly index: boolean = true,
+    readonly store: boolean = true
+  ) {}
 
   async match(trx: DataStructROTransaction, term: string): Promise<Match> {
     const queryTokens = new GeneralTokenizer().tokenize(term);
diff --git a/packages/common/infra/src/sync/indexer/impl/memory/data-struct.ts b/packages/common/infra/src/sync/indexer/impl/memory/data-struct.ts
index ffa150b531..96a77812f7 100644
--- a/packages/common/infra/src/sync/indexer/impl/memory/data-struct.ts
+++ b/packages/common/infra/src/sync/indexer/impl/memory/data-struct.ts
@@ -31,13 +31,15 @@ export class DataStruct {
 
   constructor(schema: Schema) {
     for (const [key, type] of Object.entries(schema)) {
-      if (type === 'String') {
+      const typeInfo = typeof type === 'string' ? { type } : type;
+
+      if (typeInfo.type === 'String') {
         this.invertedIndex.set(key, new StringInvertedIndex(key));
-      } else if (type === 'Integer') {
+      } else if (typeInfo.type === 'Integer') {
         this.invertedIndex.set(key, new IntegerInvertedIndex(key));
-      } else if (type === 'FullText') {
+      } else if (typeInfo.type === 'FullText') {
         this.invertedIndex.set(key, new FullTextInvertedIndex(key));
-      } else if (type === 'Boolean') {
+      } else if (typeInfo.type === 'Boolean') {
         this.invertedIndex.set(key, new BooleanInvertedIndex(key));
       } else {
         throw new Error(`Field type '${type}' not supported`);
diff --git a/packages/common/infra/src/sync/indexer/schema.ts b/packages/common/infra/src/sync/indexer/schema.ts
index dd534c48a4..891d8a891b 100644
--- a/packages/common/infra/src/sync/indexer/schema.ts
+++ b/packages/common/infra/src/sync/indexer/schema.ts
@@ -1,6 +1,24 @@
 import type { FieldType } from './field-type';
 
-export type Schema = Record<string, FieldType>;
+export type Schema = Record<
+  string,
+  | FieldType
+  | {
+      type: FieldType;
+      /**
+       * If false, the field will not be indexed, and thus not searchable.
+       *
+       * default: true
+       */
+      index?: boolean;
+      /**
+       * If false, the field will not be stored, and not included in the search result.
+       *
+       * default: true
+       */
+      store?: boolean;
+    }
+>;
 
 export function defineSchema<T extends Schema>(schema: T): T {
   return schema;
diff --git a/packages/frontend/core/src/components/blocksuite/block-suite-editor/bi-directional-link-panel.tsx b/packages/frontend/core/src/components/blocksuite/block-suite-editor/bi-directional-link-panel.tsx
index 9c201c988a..891156687f 100644
--- a/packages/frontend/core/src/components/blocksuite/block-suite-editor/bi-directional-link-panel.tsx
+++ b/packages/frontend/core/src/components/blocksuite/block-suite-editor/bi-directional-link-panel.tsx
@@ -1,6 +1,10 @@
-import { DocLinksService } from '@affine/core/modules/doc-link';
+import {
+  type Backlink,
+  DocLinksService,
+  type Link,
+} from '@affine/core/modules/doc-link';
 import { useI18n } from '@affine/i18n';
-import { useLiveData, useServices } from '@toeverything/infra';
+import { LiveData, useLiveData, useServices } from '@toeverything/infra';
 import { useCallback, useState } from 'react';
 
 import { AffinePageReference } from '../../affine/reference-link';
@@ -13,8 +17,12 @@ export const BiDirectionalLinkPanel = () => {
   });
   const t = useI18n();
 
-  const links = useLiveData(docLinksService.links.links$);
-  const backlinks = useLiveData(docLinksService.backlinks.backlinks$);
+  const links = useLiveData(
+    show ? docLinksService.links.links$ : new LiveData([] as Link[])
+  );
+  const backlinks = useLiveData(
+    show ? docLinksService.backlinks.backlinks$ : new LiveData([] as Backlink[])
+  );
   const handleClickShow = useCallback(() => {
     setShow(!show);
   }, [show]);
diff --git a/packages/frontend/core/src/components/doc-properties/table.tsx b/packages/frontend/core/src/components/doc-properties/table.tsx
index 8a3eded0a1..4edc0f26e9 100644
--- a/packages/frontend/core/src/components/doc-properties/table.tsx
+++ b/packages/frontend/core/src/components/doc-properties/table.tsx
@@ -103,7 +103,10 @@ export const DocPropertiesTableHeader = ({
     EditorSettingService,
   });
   const docBacklinks = docLinksService.backlinks;
-  const backlinks = useLiveData(docBacklinks.backlinks$);
+  const backlinks = useMemo(
+    () => docBacklinks.backlinks$.value,
+    [docBacklinks]
+  );
 
   const displayDocInfo = useLiveData(
     editorSettingService.editorSetting.settings$.selector(s => s.displayDocInfo)
diff --git a/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts b/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts
index 23c2e93fcf..19a99e4825 100644
--- a/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts
+++ b/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts
@@ -36,7 +36,7 @@ export class DocsIndexer extends Entity {
   /**
    * increase this number to re-index all docs
    */
-  static INDEXER_VERSION = 2;
+  static INDEXER_VERSION = 5;
 
   private readonly jobQueue: JobQueue<IndexerJobPayload> =
     new IndexedDBJobQueue<IndexerJobPayload>(
diff --git a/packages/frontend/core/src/modules/docs-search/schema.ts b/packages/frontend/core/src/modules/docs-search/schema.ts
index 5e401ab90a..ec395320a4 100644
--- a/packages/frontend/core/src/modules/docs-search/schema.ts
+++ b/packages/frontend/core/src/modules/docs-search/schema.ts
@@ -2,6 +2,9 @@ import { defineSchema } from '@toeverything/infra';
 
 export const docIndexSchema = defineSchema({
   title: 'FullText',
+  // summary of the doc, used for preview
+  summary: { type: 'String', index: false },
+  journal: 'String',
 });
 
 export type DocIndexSchema = typeof docIndexSchema;
@@ -15,9 +18,16 @@ export const blockIndexSchema = defineSchema({
   // reference doc id
   // ['xxx','yyy']
   refDocId: 'String',
-  // reference info
+  // reference info, used for backlink to specific block
   // [{"docId":"xxx","mode":"page","blockIds":["gt5Yfq1maYvgNgpi13rIq"]},{"docId":"yyy","mode":"edgeless","blockIds":["k5prpOlDF-9CzfatmO0W7"]}]
-  ref: 'String',
+  ref: { type: 'String', index: false },
+  // parent block flavour
+  parentFlavour: 'String',
+  // parent block id
+  parentBlockId: 'String',
+  // additional info
+  // { "databaseName": "xxx" }
+  additional: { type: 'String', index: false },
 });
 
 export type BlockIndexSchema = typeof blockIndexSchema;
diff --git a/packages/frontend/core/src/modules/docs-search/worker/in-worker.ts b/packages/frontend/core/src/modules/docs-search/worker/in-worker.ts
index 06b6462d70..21d03eccd1 100644
--- a/packages/frontend/core/src/modules/docs-search/worker/in-worker.ts
+++ b/packages/frontend/core/src/modules/docs-search/worker/in-worker.ts
@@ -9,10 +9,10 @@ import {
   Array as YArray,
   Doc as YDoc,
   Map as YMap,
-  type Text as YText,
+  Text as YText,
 } from 'yjs';
 
-import type { BlockIndexSchema, docIndexSchema } from '../schema';
+import type { BlockIndexSchema, DocIndexSchema } from '../schema';
 import type {
   WorkerIngoingMessage,
   WorkerInput,
@@ -68,12 +68,6 @@ async function crawlingDocData({
     return {};
   }
 
-  const ydoc = new YDoc();
-
-  if (!isEmptyUpdate(docBuffer)) {
-    applyUpdate(ydoc, docBuffer);
-  }
-
   let docExists: boolean | null = null;
 
   (
@@ -89,23 +83,68 @@ async function crawlingDocData({
       deletedDoc: [docId],
     };
   } else {
+    const ydoc = new YDoc();
+    let docTitle = '';
+    let summaryLenNeeded = 1000;
+    let summary = '';
+    const blockDocuments: Document<BlockIndexSchema>[] = [];
+
+    if (!isEmptyUpdate(docBuffer)) {
+      applyUpdate(ydoc, docBuffer);
+    }
+
     const blocks = ydoc.getMap<any>('blocks');
 
     if (blocks.size === 0) {
-      return {};
+      return { deletedDoc: [docId] };
     }
 
-    let docTitle = '';
-
-    const blockDocuments: Document<BlockIndexSchema>[] = [];
-
+    let rootBlockId: string | null = null;
     for (const block of blocks.values()) {
       const flavour = block.get('sys:flavour')?.toString();
       const blockId = block.get('sys:id')?.toString();
-
-      if (!flavour || !blockId) {
-        continue;
+      if (flavour === 'affine:page' && blockId) {
+        rootBlockId = blockId;
       }
+    }
+
+    if (!rootBlockId) {
+      return { deletedDoc: [docId] };
+    }
+
+    const queue: { parent?: string; id: string }[] = [{ id: rootBlockId }];
+    const visited = new Set<string>(); // avoid loop
+
+    const pushChildren = (id: string, block: YMap<any>) => {
+      const children = block.get('sys:children');
+      if (children instanceof YArray && children.length) {
+        for (let i = children.length - 1; i >= 0; i--) {
+          const childId = children.get(i);
+          if (childId && !visited.has(childId)) {
+            queue.push({ parent: id, id: childId });
+            visited.add(childId);
+          }
+        }
+      }
+    };
+
+    while (queue.length) {
+      const next = queue.pop();
+      if (!next) {
+        break;
+      }
+
+      const { parent: parentBlockId, id: blockId } = next;
+      const block = blockId ? blocks.get(blockId) : null;
+      const parentBlock = parentBlockId ? blocks.get(parentBlockId) : null;
+      if (!block) {
+        break;
+      }
+
+      const flavour = block.get('sys:flavour')?.toString();
+      const parentFlavour = parentBlock?.get('sys:flavour')?.toString();
+
+      pushChildren(blockId, block);
 
       if (flavour === 'affine:page') {
         docTitle = block.get('prop:title').toString();
@@ -150,6 +189,11 @@ async function crawlingDocData({
             .filter(ref => !!ref)
         );
 
+        const databaseName =
+          flavour === 'affine:paragraph' && parentFlavour === 'affine:database' // if block is a database row
+            ? parentBlock?.get('prop:title')?.toString()
+            : undefined;
+
         blockDocuments.push(
           Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
             docId,
@@ -164,8 +208,18 @@ async function crawlingDocData({
               },
               { refDocId: [], ref: [] }
             ),
+            parentFlavour,
+            parentBlockId,
+            additional: databaseName
+              ? JSON.stringify({ databaseName })
+              : undefined,
           })
         );
+
+        if (summaryLenNeeded > 0) {
+          summary += text.toString();
+          summaryLenNeeded -= text.length;
+        }
       }
 
       if (
@@ -183,6 +237,8 @@ async function crawlingDocData({
               blockId,
               refDocId: [pageId],
               ref: [JSON.stringify({ docId: pageId, ...params })],
+              parentFlavour,
+              parentBlockId,
             })
           );
         }
@@ -197,6 +253,8 @@ async function crawlingDocData({
               flavour,
               blockId,
               blob: [blobId],
+              parentFlavour,
+              parentBlockId,
             })
           );
         }
@@ -237,6 +295,8 @@ async function crawlingDocData({
             flavour,
             blockId,
             content: texts,
+            parentFlavour,
+            parentBlockId,
           })
         );
       }
@@ -244,32 +304,35 @@ async function crawlingDocData({
       if (flavour === 'affine:database') {
         const texts = [];
         const columnsObj = block.get('prop:columns');
-        if (!(columnsObj instanceof YArray)) {
-          continue;
+        const databaseTitle = block.get('prop:title');
+        if (databaseTitle instanceof YText) {
+          texts.push(databaseTitle.toString());
         }
-        for (const column of columnsObj) {
-          if (!(column instanceof YMap)) {
-            continue;
-          }
-          if (typeof column.get('name') === 'string') {
-            texts.push(column.get('name'));
-          }
-
-          const data = column.get('data');
-          if (!(data instanceof YMap)) {
-            continue;
-          }
-          const options = data.get('options');
-          if (!(options instanceof YArray)) {
-            continue;
-          }
-          for (const option of options) {
-            if (!(option instanceof YMap)) {
+        if (columnsObj instanceof YArray) {
+          for (const column of columnsObj) {
+            if (!(column instanceof YMap)) {
               continue;
             }
-            const value = option.get('value');
-            if (typeof value === 'string') {
-              texts.push(value);
+            if (typeof column.get('name') === 'string') {
+              texts.push(column.get('name'));
+            }
+
+            const data = column.get('data');
+            if (!(data instanceof YMap)) {
+              continue;
+            }
+            const options = data.get('options');
+            if (!(options instanceof YArray)) {
+              continue;
+            }
+            for (const option of options) {
+              if (!(option instanceof YMap)) {
+                continue;
+              }
+              const value = option.get('value');
+              if (typeof value === 'string') {
+                texts.push(value);
+              }
             }
           }
         }
@@ -289,8 +352,9 @@ async function crawlingDocData({
       addedDoc: [
         {
           id: docId,
-          doc: Document.from<typeof docIndexSchema>(docId, {
+          doc: Document.from<DocIndexSchema>(docId, {
             title: docTitle,
+            summary,
           }),
           blocks: blockDocuments,
         },
diff --git a/packages/frontend/core/src/modules/explorer/views/nodes/doc/index.tsx b/packages/frontend/core/src/modules/explorer/views/nodes/doc/index.tsx
index d86b2f5f4c..4df22ea9d1 100644
--- a/packages/frontend/core/src/modules/explorer/views/nodes/doc/index.tsx
+++ b/packages/frontend/core/src/modules/explorer/views/nodes/doc/index.tsx
@@ -22,6 +22,7 @@ import {
   useServices,
 } from '@toeverything/infra';
 import { useCallback, useLayoutEffect, useMemo, useState } from 'react';
+import { NEVER } from 'rxjs';
 
 import { ExplorerTreeNode, type ExplorerTreeNodeDropEffect } from '../../tree';
 import type { GenericExplorerNode } from '../types';
@@ -82,10 +83,15 @@ export const ExplorerDocNode = ({
 
   const children = useLiveData(
     useMemo(
-      () => LiveData.from(docsSearchService.watchRefsFrom(docId), null),
-      [docsSearchService, docId]
+      () =>
+        LiveData.from(
+          !collapsed ? docsSearchService.watchRefsFrom(docId) : NEVER,
+          null
+        ),
+      [docsSearchService, docId, collapsed]
     )
   );
+  const searching = children === null;
 
   const indexerLoading = useLiveData(
     docsSearchService.indexer.status$.map(
@@ -231,7 +237,9 @@ export const ExplorerDocNode = ({
       }
       reorderable={reorderable}
       onRename={handleRename}
-      childrenPlaceholder={<Empty onDrop={handleDropOnPlaceholder} />}
+      childrenPlaceholder={
+        searching ? null : <Empty onDrop={handleDropOnPlaceholder} />
+      }
       operations={finalOperations}
       dropEffect={handleDropEffectOnDoc}
       data-testid={`explorer-doc-${docId}`}