community[patch]: update embeddings/oracleai.py (#22240)

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Adding oracle VECTOR_ARRAY_T support.

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libs/community/langchain_community/embeddings/oracleai.py

@@ -118,23 +118,29 @@ class OracleEmbeddings(BaseModel, Embeddings):
                     "begin utl_http.set_proxy(:proxy); end;", proxy=self.proxy
                 )
 
-            for text in texts:
-                cursor.execute(
-                    "select t.* "
-                    + "from dbms_vector_chain.utl_to_embeddings(:content, "
-                    + "json(:params)) t",
-                    content=text,
-                    params=json.dumps(self.params),
-                )
+            chunks = []
+            for i, text in enumerate(texts, start=1):
+                chunk = {"chunk_id": i, "chunk_data": text}
+                chunks.append(json.dumps(chunk))
 
-                for row in cursor:
-                    if row is None:
-                        embeddings.append([])
-                    else:
-                        rdata = json.loads(row[0])
-                        # dereference string as array
-                        vec = json.loads(rdata["embed_vector"])
-                        embeddings.append(vec)
+            vector_array_type = self.conn.gettype("SYS.VECTOR_ARRAY_T")
+            inputs = vector_array_type.newobject(chunks)
+            cursor.execute(
+                "select t.* "
+                + "from dbms_vector_chain.utl_to_embeddings(:content, "
+                + "json(:params)) t",
+                content=inputs,
+                params=json.dumps(self.params),
+            )
+
+            for row in cursor:
+                if row is None:
+                    embeddings.append([])
+                else:
+                    rdata = json.loads(row[0])
+                    # dereference string as array
+                    vec = json.loads(rdata["embed_vector"])
+                    embeddings.append(vec)
 
             cursor.close()
             return embeddings
@@ -159,20 +165,27 @@ class OracleEmbeddings(BaseModel, Embeddings):
 """
 # A sample unit test.
 
-''' get the Oracle connection '''
+import oracledb
+# get the Oracle connection 
 conn = oracledb.connect(
-    user="",
-    password="",
-    dsn="")
+    user="<user>",
+    password="<password>",
+    dsn="<hostname>/<service_name>",
+)
 print("Oracle connection is established...")
 
-''' params '''
-embedder_params = {"provider":"database", "model":"demo_model"}
+# params 
+embedder_params = {"provider": "database", "model": "demo_model"}
 proxy = ""
 
-''' instance '''
+# instance
 embedder = OracleEmbeddings(conn=conn, params=embedder_params, proxy=proxy)
 
+docs = ["hello world!", "hi everyone!", "greetings!"]
+embeds = embedder.embed_documents(docs)
+print(f"Total Embeddings: {len(embeds)}")
+print(f"Embedding generated by OracleEmbeddings: {embeds[0]}\n")
+
 embed = embedder.embed_query("Hello World!")
 print(f"Embedding generated by OracleEmbeddings: {embed}")