Add Oracle23ai as a vector datasource (#5342)

Co-authored-by: walter from vm <walter.jin@oracle.com>

api/tests/integration_tests/vdb/oracle/test_oraclevector.py

@@ -0,0 +1,30 @@
+from core.rag.datasource.vdb.oracle.oraclevector import OracleVector, OracleVectorConfig
+from core.rag.models.document import Document
+from tests.integration_tests.vdb.test_vector_store import (
+    AbstractVectorTest,
+    get_example_text,
+    setup_mock_redis,
+)
+
+
+class OracleVectorTest(AbstractVectorTest):
+    def __init__(self):
+        super().__init__()
+        self.vector = OracleVector(
+            collection_name=self.collection_name,
+            config=OracleVectorConfig(
+                host="localhost",
+                port=1521,
+                user="dify",
+                password="dify",
+                database="FREEPDB1",
+            ),
+        )
+
+    def search_by_full_text(self):
+        hits_by_full_text: list[Document] = self.vector.search_by_full_text(query=get_example_text())
+        assert len(hits_by_full_text) == 0
+
+
+def test_oraclevector(setup_mock_redis):
+    OracleVectorTest().run_all_tests()