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fnc_26ai_censo_vpd.sql

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+create or replace FUNCTION fnc_26ai_censo_vpd (
+  schema_name  IN VARCHAR2,
+  object_name  IN VARCHAR2
+) RETURN VARCHAR2
+AS
+/*
+
+  Criado por: fernando.leal@oracle.com
+  Data: Oct/2025
+  Objetivo: demonstrar casos de uso do Oracle AI Database 26ai
+
+  v1 - funcao de VPD para demonstracao de dados Censo - leal
+
+  Pre req: 
+  
+-- como ADMIN
+grant CREATE ANY CONTEXT to aichat1
+
+-- como AICHAT1
+CREATE CONTEXT CTX_26AI_RLS USING pkg_26AI_CENSO_RLS;
+
+CREATE OR REPLACE PACKAGE pkg_26AI_CENSO_RLS AS
+  PROCEDURE set_user(p_user IN VARCHAR2);
+END;
+
+CREATE OR REPLACE PACKAGE BODY pkg_26AI_CENSO_RLS AS
+
+  PROCEDURE set_user(p_user IN VARCHAR2) IS
+  BEGIN
+    DBMS_SESSION.SET_CONTEXT(
+      namespace => 'CTX_26AI_RLS',
+      attribute => 'SESSION_USER',
+      value     => p_user
+    );
+  END;
+
+END ;
+
+-- teste
+BEGIN
+  pkg_26AI_CENSO_RLS.set_user('ADMIN');
+END;
+
+SELECT SYS_CONTEXT('CTX_26AI_RLS','SESSION_USER') ;
+
+
+*/
+  l_predicate  VARCHAR2(4000);
+BEGIN
+
+  pkg_26AI_CENSO_RLS.set_user( trim(lower(V('APP_USER')))  );
+
+  -- Build a predicate that filters by allowed operation codes for current user
+  l_predicate := ' UF IN (SELECT UF FROM TB_26AI_CENSO_VPD WHERE trim(lower(username)) = ''' || SYS_CONTEXT('CTX_26AI_RLS','SESSION_USER')  || ''')';
+
+  --insert into tb_test values(  l_predicate  );
+    
+  RETURN l_predicate;
+END;
+/