Unable to Query the datatype varchar of PostgreSQL Server

Hi

We are trying to fetch records from Postgre Tables.

We are successfully able to build connectivity. We are Using Postgre ODBC
Driver (Unicode).

But when I query the tables of Postgre it is unable to map the datatype
varchar of source Table.

We got following Reply from Oracle Support.

---------------------------------------------------------------------------------------------------------

Hi,

.
DATA COLLECTED
===============

TRACE FILE
------------
mylog_3388.log

.
ISSUE VERIFICATION
===================

Verified the issue by the trace file mylog_3388.log, which displays

[4464]**** PGAPI_DescribeCol: res = 22422104, stmt->status = 2,
!finished=1, !premature=0
[4464]getCharColumnSize: type=1043, col=2, unknown = 0
[4464]describeCol: col 2 fieldname = 'name'
[4464]describeCol: col 2 fieldtype = 1043
[4464]describeCol: col 2 column_size = 50
[4464]getCharColumnSize: type=1043, col=2, unknown = 0
[4464]describeCol: col 2 *pfSqlType = -9
[4464]describeCol: col 2 *pcbColDef = 50
[4464]describeCol: col 2 *pibScale = 0
[4464]describeCol: col 2 *pfNullable = 1

.
CAUSE DETERMINATION
====================
VARCHAR datatype from PostgreSQL is translated by your ODBC driver in an
unsupported datatype for HSODBC.

CAUSE JUSTIFICATION
====================
In the trace file, you get the datatype from postgreSQL
====>1043 VARCHAR(50)

then you get the datatype that ODBC driver is mapping to get back to
Oracle
====>[4464]describeCol: col 2 *pfSqlType = -9

If you look at in the Note 252548.1,
-9 is SQL_WVARCHAR

and unfortunately this ODBC datatype is not supported by the Generic
Connectivity agent (HSODBC).

To get confirmation, please have a look in the documentation:

Oracle® Database Heterogeneous Connectivity Administrator's Guide
10g Release 2 (10.2)
Part Number B14232-01
B Data Type Mapping for Generic Connectivity
B.1 Mapping ANSI Data Types to Oracle Data Types Through an ODBC Interface

.
POTENTIAL SOLUTION(S)
======================
Please check if in your ODBC driver there is any option to differently map
the SQL_WVARCHAR d
atatype
-----------------------------------------------------------------------------------------------------------

Can you please suggest why varchar datatype is not correctly identified
and what is the path to get solution?

Thanks & Regards

Vidisha B Shah
Tata Consultancy Services Limited
Mailto: vidisha(dot)shah(at)tcs(dot)com
Website: http://www.tcs.com

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