Oracle Gateways: Datatype converted to LONG in 12c while 10g showing varchar2
(Doc ID 2123618.1)
Last updated on APRIL 11, 2024
Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.2 and laterOracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
Setup used
Gateway: Oracle gateways for ODBC 12.1.0.2
ODBC Driver Manager : unixODBC-2.3.4
ODBC Driver: Any ODBC driver being used
Varchar2 column is shown as long when accessed via 12c gateways.
In Oracle 12c
desc dbo.XYZ@R;
Name Null? Type
----------------------------------------- -------- ----------------------------
OU LONG
OUDesc VARCHAR2(75 CHAR)
MonthEndDat DATE
The same setup with Oracle 10g
desc dbo.XYZ@R;
Name Null? Type
----------------------------------------- -------- ----------------------------
OU VARCHAR2(8192 CHAR)
OUDescription VARCHAR2(75)
MonthEndDate DATE
Even after setting
HS_KEEP_REMOTE_COLUMN_SIZE = LOCAL, there is no change in varchar2 column size
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |