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POC# OleDb Oracle function and Table Types
 

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  1. POC# OleDb Oracle function and Table Types
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    <p>i'm trying to invoke an Oracle function that returns a type encapsulated in a Table</p> <p>Type Object</p> <pre><code>create or replace type Z_TBL_STRUCTURE_CODE AS OBJECT ( PROJ_ID varchar2(50 BYTE) ); </code></pre> <p>Type table</p> <pre><code>create or replace type Z_TABLE_STRUCTURE_CODE AS TABLE of Z_TBL_STRUCTURE_CODE; </code></pre> <p>Oracle Function</p> <pre><code>create or replace FUNCTION Z_TESTE_IN_FUNC ( var_teste in varchar2 ) return Z_TABLE_STRUCTURE_CODE AS tab Z_TABLE_STRUCTURE_CODE; BEGIN EXECUTE IMMEDIATE 'SELECT CAST( MULTISET( select count(*) into num from structure where structure_code in ('|| var_teste ||')) as Z_TABLE_STRUCTURE_CODE) into tab from dual;'; dbms_output.put_line(var_teste); return tab; END Z_TESTE_IN_FUNC; </code></pre> <p>NOTE: PLEASE IGNORE THE EXECUTE IMMEDIATE, ITS JUST FOR A TEST.</p> <p>NOTE2: I KNOW THERE IS AN OPTION TO AVOID TYPES (USING CURSORS) BUT I HAVE NOT YET BEEN ABLE TO UNDERSTAND THE TOPIC SO I WOULD ASK YOU TO IGNORE CURSOS WHEN ANSWERING, UNLESS ITS THE ONLY OPTION AVAILABLE.</p> <p>C# Code</p> <pre><code>public DataTable getTaskStartFinish() { OleDbConnection con = null; OleDbDataReader reader = null; try{ con = new OleDbConnection(ConfigurationManager.ConnectionStrings["OracleBD"].ConnectionString); OleDbCommand cmd = new OleDbCommand("", con); cmd.CommandText = "Z_TESTE_IN_FUNC"; cmd.CommandType = CommandType.StoredProcedure; OleDbParameter retval = new OleDbParameter("retval", OleDbType.VarChar, 10); retval.Direction = ParameterDirection.ReturnValue; OleDbParameter inval = new OleDbParameter("inval", OleDbType.Variant, 50); inval.Direction = ParameterDirection.Input; inval.Value = "1"; cmd.Parameters.Add(retval); cmd.Parameters.Add(inval); con.Open(); reader = cmd.ExecuteReader(); DataTable dt = new DataTable(); dt.Load(reader); return dt; } catch(Exception ex) { throw new Exception("getTaskStartFinish error: " + ex.Message); } finally { if(con != null) con.Close(); if(reader != null || !reader.IsClosed) reader.Close(); } } </code></pre> <p>The current Error i get is the following: ORA-06550: line 1, column 13: PLS-00382: expression is of wrong type ORA-06550: line 1, column 7: PL/SQL: Statement ignored</p> <p>I have seen in the net similar examples but all using ExecuteScalar() or some code for procedures or function returning singular values but not tables.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. USFEST
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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