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commit 3da5f49c0a3727b1b57756265e84a5957551c036
Author: Mrudhulraj <[email protected]>
AuthorDate: Tue Jul 21 20:21:52 2026 -0700

    fix(query): Remove duplicated rows when datasets shared Publicly in the hub 
page (#6016)
    
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    ### What changes were proposed in this PR?
    
    #### Issue - Duplicate datasets on hub landing page / hub search
    
    Symptom: A user creates a dataset, makes it public, and grants another
    user explicit access. When the grantee browses the hub, the dataset
    appears twice in the search results.
    
     Root cause:
    
     DatasetSearchQueryBuilder.constructFromClause produced this SQL:
    
    path:
    
```amber\src\main\scala\org\apache\texera\web\resource\dashboard\DatasetSearchQueryBuilder.scala:72```
    
     ```sql
       SELECT DISTINCT ...
       FROM dataset
       LEFT JOIN dataset_user_access ON dua.did = dataset.did
       LEFT JOIN "user" ON ...
       WHERE (dua.uid = <ME>) OR (dataset.is_public = true)
     ```
    
    For a dataset that is both public AND explicitly shared with the user,
    the LEFT JOIN produces one row per matching dataset_user_access row and
    the OR makes both branches true.
    **This applies similarly to worflows too.**
    
     #### Fix 1 — DatasetSearchQueryBuilder.constructFromClause
    
    Move the UID filter from the WHERE clause into the JOIN's ON clause so
    each dataset produces at most one joined row, and force the JOIN to
    FALSE when uid == null so the SELECT still references a valid
     table.
    
     ```scala
       val baseJoin = DATASET
         .leftJoin(DATASET_USER_ACCESS)
         .on(DATASET_USER_ACCESS.DID.eq(DATASET.DID))
    .**and**(if (uid == null) DSL.**falseCondition**() else
    DATASET_USER_ACCESS.UID.eq(uid))
         .leftJoin(USER)
         .on(USER.UID.eq(DATASET.OWNER_UID))
    
       val condition: Condition =
         if (uid == null) {
           DATASET.IS_PUBLIC.eq(true)
         } else if (includePublic) {
           DATASET.IS_PUBLIC.eq(true).or(DATASET_USER_ACCESS.UID.isNotNull)
         } else {
           DATASET_USER_ACCESS.UID.isNotNull
         }
    
       baseJoin.where(condition)
     ```
    
    Why `AND` `FALSE` for `uid == null`?
    The `SELECT` references `DATASET_USER_ACCESS.PRIVILEGE`. Without
    `dataset_user_access` in the `FROM`, DB throws missing
    FROM-clause entry for table "dataset_user_access". `AND` `FALSE` keeps
    the table in the FROM while making the JOIN yield NULL access columns —
    which is the correct semantic for "no explicit grant".
    
    Behavior matrix:
    | uid | includePublic | Matched datasets |
    
    |----------|---------------|---------------------------------------------|
    | null | (n/a) | Public only |
    | not null | false | Datasets with explicit access of logged-in user
    only |
    | not null | true | Public + logged-in explicit access **(no
    duplicates)** |
    
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    ### Any related issues, documentation, discussions?
    
    Fixes #5957
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    ### How was this PR tested?
    
    Testing:
    1. Created a new DatasetResourcespec for basic unit-testing.
    2. Manual:
      Using database checks and UI workflow testing.
    
    
    Share dataset to user with READ/WRITE permissions + Publicly:
    <img width="682" height="795" alt="Share Permissions"
    
src="https://github.com/user-attachments/assets/ad42ae50-0153-4aec-bb72-4b7b084f4c91";
    />
    Observation (before fix): Two datasets are listed for the shared user
    (User access permission + Public access (NONE))
    <img width="1900" height="895" alt="testUser perspective"
    
src="https://github.com/user-attachments/assets/69ce507b-fdbc-4c87-99d0-e7fa907fbf39";
    />
    
    Result (after fix): 1 dataset of the user access permission
    <img width="1915" height="717" alt="testUser result 1"
    
src="https://github.com/user-attachments/assets/2fd0a06e-3e5e-4a9e-b550-0245619b42f8";
    />
    
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    ### Was this PR authored or co-authored using generative AI tooling?
    
    AI tools used for generating the spec files.
    
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---
 .../dashboard/DatasetSearchQueryBuilder.scala      |  47 +++--
 .../dashboard/file/DatasetResourceSpec.scala       | 228 +++++++++++++++++++++
 2 files changed, 258 insertions(+), 17 deletions(-)

diff --git 
a/amber/src/main/scala/org/apache/texera/web/resource/dashboard/DatasetSearchQueryBuilder.scala
 
b/amber/src/main/scala/org/apache/texera/web/resource/dashboard/DatasetSearchQueryBuilder.scala
index 64c8c31106..0cda3eecdc 100644
--- 
a/amber/src/main/scala/org/apache/texera/web/resource/dashboard/DatasetSearchQueryBuilder.scala
+++ 
b/amber/src/main/scala/org/apache/texera/web/resource/dashboard/DatasetSearchQueryBuilder.scala
@@ -66,30 +66,38 @@ object DatasetSearchQueryBuilder extends SearchQueryBuilder 
with LazyLogging {
       params: DashboardResource.SearchQueryParams,
       includePublic: Boolean = false
   ): TableLike[_] = {
+    // Case 1: if `uid` is (set) and `includePublic` is false
+    // -> return ONLY datasets that given `uid` has explicit access to.
+    // Case 2: if `uid` is (null) and `includePublic` is true
+    // -> return ONLY datasets that are public
+    // Case 3: if `uid` is (set) and `includePublic` is true
+    // -> Union of datasets that are public and explicitly shared with user is 
returned
+    // Case 4: if `uid` is (null) and `includePublic` is false
+    // -> return public datasets by default as user might not be logged in
     val baseJoin = DATASET
       .leftJoin(DATASET_USER_ACCESS)
       .on(DATASET_USER_ACCESS.DID.eq(DATASET.DID))
+      .and(if (uid == null) DSL.falseCondition() else 
DATASET_USER_ACCESS.UID.eq(uid))
       .leftJoin(USER)
       .on(USER.UID.eq(DATASET.OWNER_UID))
 
-    // Default condition starts as true, ensuring all datasets are selected 
initially.
-    var condition: Condition = DSL.trueCondition()
-
-    if (uid == null) {
-      // If `uid` is null, the user is not logged in or performing a public 
search
-      // We only select datasets marked as public
-      condition = DATASET.IS_PUBLIC.eq(true)
-    } else {
-      // When `uid` is present, we add a condition to only include datasets 
with direct user access.
-      val userAccessCondition = DATASET_USER_ACCESS.UID.eq(uid)
-
-      if (includePublic) {
-        // If `includePublic` is true, we extend visibility to public datasets 
as well.
-        condition = userAccessCondition.or(DATASET.IS_PUBLIC.eq(true))
+    // Set the `condition` where clause here
+    val condition: Condition =
+      if (uid == null) {
+        // Case 2 and 4
+        // Get all the public datasets by default
+        DATASET.IS_PUBLIC.eq(true)
       } else {
-        condition = userAccessCondition
+        if (includePublic) {
+          // Case 3
+          // Get all the datasets that `uid` has access to and the public 
datasets
+          DATASET.IS_PUBLIC.eq(true).or(DATASET_USER_ACCESS.UID.isNotNull)
+        } else {
+          // Case 1
+          // If `includePublic` is false get only user accessible datasets
+          DATASET_USER_ACCESS.UID.isNotNull
+        }
       }
-    }
     baseJoin.where(condition)
   }
 
@@ -140,7 +148,12 @@ object DatasetSearchQueryBuilder extends 
SearchQueryBuilder with LazyLogging {
     val dd = DashboardDataset(
       dataset,
       owner.getEmail,
-      record.get(DATASET_USER_ACCESS.PRIVILEGE, classOf[PrivilegeEnum]),
+      Option(
+        record.get(
+          DATASET_USER_ACCESS.PRIVILEGE,
+          classOf[PrivilegeEnum]
+        )
+      ).getOrElse(PrivilegeEnum.NONE),
       dataset.getOwnerUid == uid,
       size
     )
diff --git 
a/amber/src/test/scala/org/apache/texera/web/resource/dashboard/file/DatasetResourceSpec.scala
 
b/amber/src/test/scala/org/apache/texera/web/resource/dashboard/file/DatasetResourceSpec.scala
new file mode 100644
index 0000000000..1d4b5635e0
--- /dev/null
+++ 
b/amber/src/test/scala/org/apache/texera/web/resource/dashboard/file/DatasetResourceSpec.scala
@@ -0,0 +1,228 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.texera.web.resource.dashboard.file
+
+import org.apache.texera.auth.SessionUser
+import org.apache.texera.dao.MockTexeraDB
+import org.apache.texera.dao.jooq.generated.enums.UserRoleEnum
+import org.apache.texera.dao.jooq.generated.tables.pojos.User
+import 
org.apache.texera.web.resource.dashboard.DashboardResource.SearchQueryParams
+import 
org.apache.texera.web.resource.dashboard.user.dataset.DatasetResource.DashboardDataset
+import org.apache.texera.web.resource.dashboard.{FulltextSearchQueryUtils}
+import org.apache.texera.web.resource.dashboard.DatasetSearchQueryBuilder
+import org.scalatest.flatspec.AnyFlatSpec
+import org.apache.texera.dao.jooq.generated.tables.daos.{UserDao, DatasetDao, 
DatasetUserAccessDao}
+import org.apache.texera.dao.jooq.generated.enums.PrivilegeEnum
+import org.apache.texera.dao.jooq.generated.tables.pojos.{Dataset, 
DatasetUserAccess}
+import org.scalatest.{BeforeAndAfterAll, BeforeAndAfterEach}
+import java.time.OffsetDateTime
+import java.util
+import 
org.apache.texera.web.resource.dashboard.SearchQueryBuilder.DATASET_RESOURCE_TYPE
+
+class DatasetResourceSpec
+    extends AnyFlatSpec
+    with BeforeAndAfterAll
+    with BeforeAndAfterEach
+    with MockTexeraDB {
+
+  // An example creation time to test Account Creation Time attribute
+  private val exampleCreationTime: OffsetDateTime =
+    OffsetDateTime.parse("2025-01-01T00:00:00Z")
+
+  private val ownerUser: User = {
+    val user = new User
+    user.setUid(Integer.valueOf(1))
+    user.setName("owner_user")
+    user.setRole(UserRoleEnum.ADMIN)
+    user.setEmail("[email protected]")
+    user.setPassword("123")
+    user.setComment("test_comment")
+    user.setAccountCreationTime(exampleCreationTime)
+    user
+  }
+
+  private val testUser: User = {
+    val user = new User
+    user.setUid(Integer.valueOf(2))
+    user.setName("test_user")
+    user.setEmail("[email protected]")
+    user.setRole(UserRoleEnum.REGULAR)
+    user.setPassword("123")
+    user.setComment("test_comment2")
+    user.setAccountCreationTime(exampleCreationTime)
+    user
+  }
+
+  private val testDatasetRecord: Dataset = {
+    val dataset = new Dataset()
+    dataset.setName("test_dataset1")
+    dataset.setDescription("keyword_in_dataset_description")
+    dataset.setIsPublic(true)
+    dataset.setDid(Integer.valueOf(1))
+    dataset
+  }
+
+  private val sessionUser1: SessionUser = {
+    new SessionUser(ownerUser)
+  }
+
+  private val sessionUser2: SessionUser = {
+    new SessionUser(testUser)
+  }
+
+  // get context lazily
+  private lazy val datasetDao: DatasetDao = {
+    new DatasetDao(getDSLContext.configuration())
+  }
+
+  private lazy val datasetUserAccessDao: DatasetUserAccessDao = {
+    new DatasetUserAccessDao(getDSLContext.configuration())
+  }
+
+  override protected def beforeAll(): Unit = {
+    initializeDBAndReplaceDSLContext()
+    FulltextSearchQueryUtils.usePgroonga = false // disable pgroonga
+    // add test user directly
+    val userDao = new UserDao(getDSLContext.configuration())
+    userDao.insert(ownerUser)
+    userDao.insert(testUser)
+  }
+
+  override protected def beforeEach(): Unit = {
+    // Clean up environment before each test case
+  }
+
+  override protected def afterEach(): Unit = {
+    // 1. Delete access rows before the dataset
+    val datasetUserAccessDao = new 
DatasetUserAccessDao(getDSLContext.configuration())
+    getDSLContext
+      
.deleteFrom(org.apache.texera.dao.jooq.generated.tables.DatasetUserAccess.DATASET_USER_ACCESS)
+      .execute()
+    // 2. Fetch all datasets owned by the owner
+    val datasets = datasetDao.fetchByOwnerUid(ownerUser.getUid())
+    if (!datasets.isEmpty) {
+      datasetDao.delete(datasets)
+    }
+  }
+
+  override protected def afterAll(): Unit = {
+    shutdownDB()
+  }
+
+  private def getKeywordsArray(keywords: String*): util.ArrayList[String] = {
+    val keywordsList = new util.ArrayList[String]()
+    for (keyword <- keywords) {
+      keywordsList.add(keyword)
+    }
+    keywordsList
+  }
+
+  private def assertSameDataset(a: Dataset, b: DashboardDataset): Unit = {
+    assert(a.getName == b.dataset.getName)
+  }
+
+  "User.accountCreationTime" should "be persisted and retrievable via UserDao" 
in {
+    val userDao = new UserDao(getDSLContext.configuration())
+    val u1 = userDao.fetchOneByUid(Integer.valueOf(1))
+    val u2 = userDao.fetchOneByUid(Integer.valueOf(2))
+
+    assert(u1.getAccountCreationTime != null)
+    assert(u2.getAccountCreationTime != null)
+
+    assert(u1.getAccountCreationTime.isEqual(exampleCreationTime))
+    assert(u2.getAccountCreationTime.isEqual(exampleCreationTime))
+  }
+
+  it should "remain unchanged when updating unrelated fields" in {
+    val userDao = new UserDao(getDSLContext.configuration())
+    val u1 = userDao.fetchOneByUid(Integer.valueOf(1))
+    val originalTime = u1.getAccountCreationTime
+
+    u1.setComment("updated_comment")
+    userDao.update(u1)
+
+    val test_u1 = userDao.fetchOneByUid(Integer.valueOf(1))
+    assert(test_u1.getAccountCreationTime.isEqual(originalTime))
+  }
+
+  "DatasetResource /owner view" should "get deduplicated datasets created by 
owner and shared publicly" in {
+    // Only metadatas of dataset and the user is maintained - no dataset is 
actually created in LakeFS
+    // Create dataset
+    val datasetDao = new DatasetDao(getDSLContext.configuration())
+    testDatasetRecord.setOwnerUid(ownerUser.getUid)
+    datasetDao.insert(testDatasetRecord)
+
+    // Give write access to the owner user
+    datasetUserAccessDao.insert(
+      new DatasetUserAccess(
+        testDatasetRecord.getDid,
+        ownerUser.getUid,
+        PrivilegeEnum.WRITE
+      )
+    )
+
+    // Build the query - bypasses DashboarResource
+    val query =
+      DatasetSearchQueryBuilder.constructQuery(
+        ownerUser.getUid,
+        SearchQueryParams(resourceType = DATASET_RESOURCE_TYPE),
+        includePublic = true
+      )
+    // Assert the length of returned dataset
+    val datasetEntryList = getDSLContext.fetch(query)
+    assert(datasetEntryList.size() == 1)
+  }
+
+  "/search API" should "deduplicate datasets shared both publicly and 
explicitly with NON-WRITE permissions" in {
+    // Only metadatas of dataset and the user is maintained - no dataset is 
actually created in LakeFS
+    // Create dataset
+    val datasetDao = new DatasetDao(getDSLContext.configuration())
+    testDatasetRecord.setOwnerUid(ownerUser.getUid)
+    datasetDao.insert(testDatasetRecord)
+
+    // Give write access to the owner user
+    datasetUserAccessDao.insert(
+      new DatasetUserAccess(
+        ownerUser.getUid,
+        testDatasetRecord.getDid,
+        PrivilegeEnum.WRITE
+      )
+    )
+
+    datasetUserAccessDao.insert(
+      new DatasetUserAccess(
+        testDatasetRecord.getDid,
+        testUser.getUid,
+        PrivilegeEnum.READ
+      )
+    )
+
+    // Build the query
+    val query =
+      DatasetSearchQueryBuilder.constructQuery(
+        testUser.getUid,
+        SearchQueryParams(resourceType = DATASET_RESOURCE_TYPE),
+        includePublic = true
+      )
+    // Assert the length of returned dataset
+    val datasetEntryList = getDSLContext.fetch(query)
+    assert(datasetEntryList.size() == 1)
+  }
+}

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