DG4ODBC on Windows Oracle 11.1 unable to read SQL_WCHAR ( Unicode ) data ?

Question

I have setup two databases on Windows that can be access by ODBC. Both database contain the following table :-
create table test1 ( col1 varchar(10) );
insert into test1 values ('ABCDEF');
The first database returns columns as a SQL_CHAR and the second returns data as SQL_WCHAR.
In SQLPlus the first database works just fine ‘ABCEDF’. The second gives ‘``````’ a single ` character for every character in the field.
As far as I can see DG4ODBC is reading SQL_WCHAR's as UTF8 characters. Can any one confirm this and is there a way to get round the problem ?
I have tried various HS_LANGUAGE, HS_NLS_NCHAR settings already but to no avail.

Answer 1

Why does it return an SQL_WCHAR is not the issue.
The issue is why doesn't it convert it correctly when other applications do. I am almost convinced the issue will be down to the character mapping but I'm not 100% sure where or how to set it ( HS_NLS_NCHAR or possibly HS_FDS_MAP_NCHAR ? ) . The other application I used were not configurable in terms character
Oracle Corporation --- TUESDAY APR 15 2008 14:17:06.688
Heterogeneous Agent Release
11.1.0.6.0
Oracle Corporation --- TUESDAY APR 15 2008 14:17:06.688
Version 11.1.0.6.0
Entered hgogprd
HOSGIP for "HS_FDS_TRACE_LEVEL" returned "DEBUG"
Entered hgosdip
setting HS_OPEN_CURSORS to default of 50
setting HS_FDS_RECOVERY_ACCOUNT to default of "RECOVER"
setting HS_FDS_RECOVERY_PWD to default value
setting HS_FDS_TRANSACTION_LOG to default of "HS_TRANSACTION_LOG"
setting HS_FDS_TRANSACTION_ISOLATION to default of "READ_COMMITTED"
setting HS_NLS_NCHAR to default of "AL16UTF16"
setting HS_FDS_TIMESTAMP_AS_DATE to default of "TRUE"
setting HS_RPC_FETCH_REBLOCKING to default of "ON"
setting HS_FDS_FETCH_ROWS to default of "100"
setting HS_FDS_RESULTSET_SUPPORT to default of "FALSE"
setting HS_FDS_PROC_IS_FUNC to default of "FALSE"
setting HS_FDS_CHARACTER_SEMANTICS to default of "FALSE"
setting HS_FDS_MAP_NCHAR to default of "TRUE"
setting HS_NLS_DATE_FORMAT to default of "YYYY-MM-DD HH24:MI:SS"
setting HS_FDS_REPORT_REAL_AS_DOUBLE to default of "FALSE"
setting HS_LONG_PIECE_TRANSFER_SIZE to default of "65536"
setting HS_SQL_HANDLE_STMT_REUSE to default of "FALSE"
setting HS_FDS_QUERY_DRIVER to default of "TRUE"
setting HS_FDS_SUPPORT_STATISTICS to default of "FALSE"
setting HS_CALL_NAME_ISP to "gtw$:SQLTables;gtw$:SQLColumns;gtw$:SQLPrimaryKeys;gtw$:SQLForeignKeys;gtw$:SQLProcedures;gtw$:SQLStatistics"
Exiting hgosdip, rc=0
ORACLE_SID is "FB"
Product-Info:
Port Rls/Upd:6/0 PrdStat:0
Agent:Oracle Database Gateway for ODBC
Facility:hsa
Class:ODBC, ClassVsn:11.1.0.6.0_0006, Instance:FB
Exiting hgogprd, rc=0
Entered hgoinit
HOCXU_COMP_CSET=1
HOCXU_DRV_CSET=178
HOCXU_DRV_NCHAR=2000
HOCXU_DB_CSET=178
HOCXU_SEM_VER=110000
Entered hgolofn at 2008/04/15-14:17:06
Exiting hgolofn, rc=0 at 2008/04/15-14:17:06
HOSGIP for "HS_OPEN_CURSORS" returned "50"
HOSGIP for "HS_FDS_FETCH_ROWS" returned "100"
HOSGIP for "HS_LONG_PIECE_TRANSFER_SIZE" returned "65536"
HOSGIP for "HS_NLS_NUMERIC_CHARACTER" returned ".,"
Exiting hgoinit, rc=0 at 2008/04/15-14:17:06
Entered hgolgon at 2008/04/15-14:17:06
reco:0, name:SYSDBA, tflag:0
Entered hgosuec at 2008/04/15-14:17:06
Exiting hgosuec, rc=0 at 2008/04/15-14:17:06
HOSGIP for "HS_FDS_RECOVERY_ACCOUNT" returned "RECOVER"
HOSGIP for "HS_FDS_TRANSACTION_LOG" returned ""HS_TRANSACTION_LOG""
HOSGIP for "HS_FDS_TIMESTAMP_AS_DATE" returned "TRUE"
HOSGIP for "HS_FDS_CHARACTER_SEMANTICS" returned "FALSE"
HOSGIP for "HS_FDS_MAP_NCHAR" returned "TRUE"
HOSGIP for "HS_FDS_RESULT_SET_SUPPORT" returned "FALSE"
HOSGIP for "HS_FDS_PROC_IS_FUNC" returned "FALSE"
HOSGIP for "HS_FDS_REPORT_REAL_AS_DOUBLE" returned "FALSE"
using SYSDBA as default value for "HS_FDS_DEFAULT_OWNER"
HOSGIP for "HS_SQL_HANDLE_STMT_REUSE" returned "FALSE"
Entered hgocont at 2008/04/15-14:17:07
HS_FDS_CONNECT_INFO = "FB"
RC=-1 from HOSGIP for "HS_FDS_CONNECT_STRING"
Entered hgogenconstr at 2008/04/15-14:17:07
dsn:FB, name:SYSDBA
optn:
##>Connect Parameters (len=31)<##
## DSN=FB;
#! UID=SYSDBA;
#! PWD=*
Exiting hgogenconstr, rc=0 at 2008/04/15-14:17:07
DriverName:FBODBC.DLL, DriverVer:01.02.0002
DBMS Name:Firebird, DBMS Version:01.02.0002
Exiting hgocont, rc=0 at 2008/04/15-14:17:07
SQLGetInfo returns for SQL_CATALOG_NAME
Exiting hgolgon, rc=0 at 2008/04/15-14:17:07
Entered hgoulcp at 2008/04/15-14:17:07
Entered hgowlst at 2008/04/15-14:17:07
Exiting hgowlst, rc=0 at 2008/04/15-14:17:07
SQLGetInfo returns " for SQL_IDENTIFIER_QUOTE_CHAR
SQLGetInfo returns Y for SQL_COLUMN_ALIAS
Exiting hgoulcp, rc=0 at 2008/04/15-14:17:07
Entered hgouldt at 2008/04/15-14:17:07
Exiting hgouldt, rc=0 at 2008/04/15-14:17:07
Entered hgobegn at 2008/04/15-14:17:07
tflag:0 , initial:1
hoi:0x12f074, ttid (len 27) is ...
00: 54435056 31545345 6433352E 36363065 [VPCTEST1.53de066]
10: 2E352E64 312E3132 383537 [d.5.21.1857]
tbid (len 24) is ...
00: 54435056 31545345 322E355B 38312E31 [VPCTEST1[5.21.18]
10: 5B5D3735 5D342E31 [57][1.4]]
Exiting hgobegn, rc=0 at 2008/04/15-14:17:07
Entered hgodtab at 2008/04/15-14:17:07
count:1
table: RGS
Entered hgopcda at 2008/04/15-14:17:07
Column:1(COL1): dtype:-9 (WVARCHAR), prc/scl:10/0, nullbl:0, octet:20, sign:1, radix:0
Exiting hgopcda, rc=0 at 2008/04/15-14:17:07
Entered hgopcda at 2008/04/15-14:17:08
Column:2(COL2): dtype:-8 (WCHAR), prc/scl:10/0, nullbl:1, octet:20, sign:1, radix:0
Exiting hgopcda, rc=0 at 2008/04/15-14:17:08
Entered hgopcda at 2008/04/15-14:17:08
Column:3(COL3): dtype:4 (INTEGER), prc/scl:10/0, nullbl:1, octet:20, sign:1, radix:0
Exiting hgopcda, rc=0 at 2008/04/15-14:17:08
The hoada for table RGS follows...
hgodtab, line 577: Printing hoada @ 022815C4
MAX:3, ACTUAL:3, BRC:1, WHT=6
DTY NULL-OK LEN MAXBUFLEN PR/SC CST IND MOD NAME
12 VARCHAR N 20 20 128/ 10 2000 0 40 COL1
1 CHAR Y 20 20 128/ 10 2000 0 40 COL2
4 INTEGER Y 4 4 0/ 0 0 0 0 COL3
Exiting hgodtab, rc=0 at 2008/04/15-14:17:08
Entered hgodafr, cursor id 0 at 2008/04/15-14:17:08
Exiting hgodafr, rc=0 at 2008/04/15-14:17:08
Entered hgotcis at 2008/04/15-14:17:08
Calling SQLStatistics for RGS
IndexType=SQL_TABLE_STAT: cardinality=0
New Index:RDB$PRIMARY10, type=3, ASCENDING, UNIQUE, cardinality=0
ordinal position = 1
Calling SQLColumns for SYSDBA.RGS
Column "COL1": dtype=-9, colsize=10, decdig=0, char_octet_length=20, cumulative avg row len=15
Column "COL2": dtype=-8, colsize=10, decdig=0, char_octet_length=20, cumulative avg row len=35
Column "COL3": dtype=4, colsize=10, decdig=0, char_octet_length=20, cumulative avg row len=39
Exiting hgotcis, rc=0 at 2008/04/15-14:17:08
Entered hgopars, cursor id 1 at 2008/04/15-14:17:08
type:0
SQL text from hgopars, id=1, len=50 ...
00: 454C4553 41205443 43222E31 22314C4F [SELECT A1."COL1"]
10: 2E31412C 4C4F4322 412C2232 43222E31 [,A1."COL2",A1."C]
20: 22334C4F 4F524620 5222204D 20225347 [OL3" FROM "RGS" ]
30: 4131 [A1]
Exiting hgopars, rc=0 at 2008/04/15-14:17:08
Entered hgoopen, cursor id 1 at 2008/04/15-14:17:08
hgoopen, line 83: NO hoada to print
Exiting hgoopen, rc=0 at 2008/04/15-14:17:08
Entered hgodscr, cursor id 1 at 2008/04/15-14:17:08
Entered hgopcda at 2008/04/15-14:17:08
Column:1(COL1): dtype:-9 (WVARCHAR), prc/scl:10/0, nullbl:0, octet:20, sign:1, radix:0
Exiting hgopcda, rc=0 at 2008/04/15-14:17:08
Entered hgopcda at 2008/04/15-14:17:08
Column:2(COL2): dtype:-8 (WCHAR), prc/scl:10/0, nullbl:1, octet:20, sign:1, radix:0
Exiting hgopcda, rc=0 at 2008/04/15-14:17:08
Entered hgopcda at 2008/04/15-14:17:08
Column:3(COL3): dtype:4 (INTEGER), prc/scl:11/0, nullbl:1, octet:20, sign:1, radix:0
Exiting hgopcda, rc=0 at 2008/04/15-14:17:08
hgodscr, line 521: Printing hoada @ 023093F8
MAX:3, ACTUAL:3, BRC:100, WHT=5
DTY NULL-OK LEN MAXBUFLEN PR/SC CST IND MOD NAME
12 VARCHAR N 20 20 128/ 10 2000 0 40 COL1
1 CHAR Y 20 20 128/ 10 2000 0 40 COL2
4 INTEGER Y 4 4 0/ 0 0 0 0 COL3
Exiting hgodscr, rc=0 at 2008/04/15-14:17:08
Entered hgoftch, cursor id 1 at 2008/04/15-14:17:08
hgoftch, line 114: Printing hoada @ 023093F8
MAX:3, ACTUAL:3, BRC:100, WHT=5
DTY NULL-OK LEN MAXBUFLEN PR/SC CST IND MOD NAME
12 VARCHAR N 20 20 128/ 10 2000 0 40 COL1
1 CHAR Y 20 20 128/ 10 2000 0 40 COL2
4 INTEGER Y 4 4 0/ 0 0 0 0 COL3
SQLBindCol: column 1, cdatatype: -8, bflsz: 22
SQLBindCol: column 2, cdatatype: -8, bflsz: 22
SQLBindCol: column 3, cdatatype: -16, bflsz: 4
2 rows fetched
Exiting hgoftch, rc=0 at 2008/04/15-14:17:08
Entered hgoftch, cursor id 1 at 2008/04/15-14:17:08
hgoftch, line 114: Printing hoada @ 023093F8
MAX:3, ACTUAL:3, BRC:2, WHT=5
DTY NULL-OK LEN MAXBUFLEN PR/SC CST IND MOD NAME
12 VARCHAR N 14 20 128/ 10 2000 0 40 COL1
1 CHAR Y 20 20 128/ 10 2000 0 40 COL2
4 INTEGER Y 4 4 0/ 0 0 0 0 COL3
0 rows fetched
Exiting hgoftch, rc=1403 at 2008/04/15-14:17:08
Entered hgoclse, cursor id 1 at 2008/04/15-14:17:12
Exiting hgoclse, rc=0 at 2008/04/15-14:17:12
Entered hgodafr, cursor id 1 at 2008/04/15-14:17:12
Exiting hgodafr, rc=0 at 2008/04/15-14:17:12
Entered hgocomm at 2008/04/15-14:17:12
keepinfo:0, tflag:1
00: 54435056 31545345 6433352E 36363065 [VPCTEST1.53de066]
10: 2E352E64 312E3132 383537 [d.5.21.1857]
tbid (len 24) is ...
00: 54435056 31545345 322E355B 38312E31 [VPCTEST1[5.21.18]
10: 5B5D3735 5D342E31 [57][1.4]]
cmt(0):
Entered hgocpctx at 2008/04/15-14:17:12
Exiting hgocpctx, rc=0 at 2008/04/15-14:17:12
Exiting hgocomm, rc=0 at 2008/04/15-14:17:12
Entered hgolgof at 2008/04/15-14:17:12
tflag:1
Exiting hgolgof, rc=0 at 2008/04/15-14:17:12
Entered hgoexit at 2008/04/15-14:17:12
Exiting hgoexit, rc=0 at 2008/04/15-14:17:12
Message was edited by:
user630562