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2026-05-08 13:09:00 +00:00
parent dc6c1662ed
commit 6359082956
5 changed files with 496 additions and 0 deletions
--- a/fnc_26ai_rag_siderurgia.sql
+++ b/fnc_26ai_rag_siderurgia.sql
@@ -0,0 +1,100 @@
+create or replace function fnc_26ai_rag_siderurgia (p_ai_prompt IN clob, 
+                                    p_oci_cred IN VARCHAR2,
+                                    p_id in number,
+                                    p_comp_id in varchar2) 
+return clob 
+as
+
+/*
+
+  Criado por: fernando.leal@oracle.com
+  Data: Mar/2026
+  Objetivo: demonstrar casos de uso do Oracle AI Database 26ai
+
+  v1 - funcao de RAG para Siderurgia - leal
+
+*/
+														 
+    -- modelos: https://docs.oracle.com/en-us/iaas/Content/generative-ai/pretrained-models.htm
+    -- cuidado com pre requisito (1)
+    gen_ai_endpoint varchar2(500) := 'https://inference.generativeai.us-chicago-1.oci.oraclecloud.com';
+    gen_ai_model varchar2(500) := 'meta.llama-4-maverick-17b-128e-instruct-fp8';  
+
+    chat_resp dbms_cloud_types.RESP;
+    image_resp dbms_cloud_types.RESP;    
+
+    base64_image CLOB := NULL;
+    request_json_part1 CLOB;
+    request_json_part2 CLOB;
+    request_body BLOB;
+    v_ext varchar2(20);
+
+BEGIN
+    -- create temp blobs
+    dbms_lob.createtemporary(request_body, FALSE);
+
+	select APEX_WEB_SERVICE.BLOB2CLOBBASE64( FILE_BLOB ,'N','N' ) ,
+           lower(regexp_replace(file_name, '.*\.([a-zA-Z0-9]+)$', '\1')) 
+	  into  base64_image, v_ext  
+	  from TB_26AI_SIDERURGIA
+	 where id = p_id;
+
+    request_json_part1 := to_clob(
+     '{
+        "compartmentId": "' || p_comp_id || '",
+        "servingMode": 
+            {
+                "modelId": "' || gen_ai_model || '",
+				"servingType": "ON_DEMAND"
+            }
+        ,
+        "chatRequest": {
+            "apiFormat": "GENERIC",	
+            "messages": [
+                {
+                    "role": "USER",				
+					"content": [
+						{
+							"type": "TEXT",
+							"text": "' ||  replace(replace(replace(replace(  p_ai_prompt  ,chr(10),null),chr(13),null),'"',''),'''','')  || '"
+						},
+						{
+							"type": "IMAGE",
+                            "imageUrl": {
+                                "url": "data:image/' || v_ext || ';base64,');
+
+    request_json_part2 := to_clob('"
+                            }    
+						}                        
+					]
+                }
+            ],
+            "temperature":      0.4,
+            "numGenerations":    5,
+            "topK":              1
+        }
+    }');
+
+    -- append part1 json to request blob
+    dbms_lob.append(request_body, apex_util.clob_to_blob(p_clob => request_json_part1,p_charset => 'AL32UTF8'));
+
+    -- append  base64 image to request blob
+    dbms_lob.append(request_body, apex_util.clob_to_blob(p_clob => base64_image,p_charset => 'AL32UTF8'));
+
+    -- append part2 json to request blob
+    dbms_lob.append(request_body, apex_util.clob_to_blob(p_clob => request_json_part2,p_charset => 'AL32UTF8'));
+
+    -- call Gen AI Chat    
+    chat_resp := dbms_cloud.send_request(
+       credential_name => p_oci_cred,
+        uri => gen_ai_endpoint || '/20231130/actions/chat',
+        method => dbms_cloud.METHOD_POST,
+        body => request_body
+    );
+
+    -- clear temp blobs
+    dbms_lob.freetemporary(request_body);
+
+    RETURN  json_value( dbms_cloud.get_response_text(chat_resp),'$.chatResponse.choices[0].message.content[0].text')     ;
+END;
+/