diff --git a/.github/workflows/auto-review.yml b/.github/workflows/auto-review.yml
new file mode 100644
index 000000000..36b721775
--- /dev/null
+++ b/.github/workflows/auto-review.yml
@@ -0,0 +1,69 @@
+name: Auto Review
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  review:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get PR diff
+        id: diff
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh pr diff ${{ github.event.pull_request.number }} > /tmp/pr.diff
+          # Truncate to ~30k chars to stay within LLM context
+          head -c 30000 /tmp/pr.diff > /tmp/pr_truncated.diff
+
+      - name: Review with DeepSeek
+        id: review
+        env:
+          DEEPSEEK_API_KEY: ${{ secrets.DEEPSEEK_API_KEY }}
+        run: |
+          DIFF=$(cat /tmp/pr_truncated.diff | jq -Rs .)
+          TITLE=$(echo '${{ github.event.pull_request.title }}' | jq -Rs .)
+          BODY=$(echo '${{ github.event.pull_request.body }}' | head -c 2000 | jq -Rs .)
+
+          RESPONSE=$(curl -s https://api.deepseek.com/chat/completions \
+            -H "Authorization: Bearer ${DEEPSEEK_API_KEY}" \
+            -H "Content-Type: application/json" \
+            -d "{
+              \"model\": \"deepseek-chat\",
+              \"messages\": [
+                {
+                  \"role\": \"system\",
+                  \"content\": \"你是一个专业的代码审查员。请审查以下 Pull Request 的代码变更，给出简洁的中文评审意见。重点关注：1. 潜在的 bug 或逻辑错误 2. 安全问题 3. 性能问题 4. 代码风格和可读性。如果代码没有问题，简单说 LGTM 并给出简短总结。不要逐行重复代码。\"
+                },
+                {
+                  \"role\": \"user\",
+                  \"content\": \"PR 标题: ${TITLE}\n\nPR 描述: ${BODY}\n\n代码变更:\n${DIFF}\"
+                }
+              ],
+              \"max_tokens\": 2000
+            }")
+
+          REVIEW=$(echo "$RESPONSE" | jq -r '.choices[0].message.content // "审查失败，请手动检查。"')
+
+          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
+          echo "comment<<$EOF" >> "$GITHUB_OUTPUT"
+          echo "$REVIEW" >> "$GITHUB_OUTPUT"
+          echo "$EOF" >> "$GITHUB_OUTPUT"
+
+      - name: Post review comment
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh pr comment ${{ github.event.pull_request.number }} --body "$(cat <<'EOF'
+          🤖 **Auto Review by DeepSeek**
+
+          ${{ steps.review.outputs.comment }}
+          EOF
+          )"
diff --git a/crates/dbx-core/src/db/oracle_driver.rs b/crates/dbx-core/src/db/oracle_driver.rs
index 4c4b918f7..88f7934cb 100644
--- a/crates/dbx-core/src/db/oracle_driver.rs
+++ b/crates/dbx-core/src/db/oracle_driver.rs
@@ -38,7 +38,7 @@ fn value_to_json(val: &rust_oracle::Value) -> serde_json::Value {
 }
 
 pub async fn list_databases(conn: &OracleClient) -> Result<Vec<DatabaseInfo>, String> {
-    log::debug!("[oracle] list_databases: querying all_users");
+    log::info!("[oracle] list_databases: START");
     let result = conn
         .query(
             "SELECT username FROM all_users \
@@ -49,11 +49,15 @@ pub async fn list_databases(conn: &OracleClient) -> Result<Vec<DatabaseInfo>, St
         )
         .await;
 
+    log::info!("[oracle] list_databases: primary done, ok={}", result.is_ok());
+
     let result = match result {
         Ok(r) => r,
-        Err(_) => conn
-            .query(
-                "SELECT username FROM all_users \
+        Err(e) => {
+            log::info!("[oracle] list_databases: primary err={e}, trying fallback...");
+            let r = conn
+                .query(
+                    "SELECT username FROM all_users \
                  WHERE username NOT IN (\
                    'SYS','SYSTEM','SYSMAN','DBSNMP','SYSBACKUP','SYSDG','SYSKM','OUTLN',\
                    'AUDSYS','LBACSYS','DVF','DVSYS','APPQOSSYS','CTXSYS','MDSYS','MDDATA',\
@@ -63,15 +67,18 @@ pub async fn list_databases(conn: &OracleClient) -> Result<Vec<DatabaseInfo>, St
                    'REMOTE_SCHEDULER_AGENT','PDBADMIN','DGPDB_INT','OPS$ORACLE',\
                    'GGSYS','FLOWS_FILES','APEX_PUBLIC_USER'\
                  ) ORDER BY username",
-                &[],
-            )
-            .await
-            .map_err(|e| {
-                log::error!("[oracle] list_databases failed: {e}");
+                    &[],
+                )
+                .await;
+            log::info!("[oracle] list_databases: fallback done, ok={}", r.is_ok());
+            r.map_err(|e| {
+                log::error!("[oracle] list_databases fallback err: {e}");
                 e.to_string()
-            })?,
+            })?
+        }
     };
 
+    log::info!("[oracle] list_databases: DONE, {} rows", result.rows.len());
     Ok(result.rows.iter().map(|row| DatabaseInfo { name: row.get_string(0).unwrap_or("").to_string() }).collect())
 }