If you use CHARSET(EBCDIC) when compiling COBOL code that contains SQL host variables that are of the display numeric type defined as XXXXXX, you must link to the oesqlebc library to prevent link errors.
On UNIX/Linux, the symbol oesqleb2 is defined in the shared objects coboesqlebc.so (32-bit) and coboesqlebc64.so (64-bit). To resolve the link error, compile using the -d flag as follows:
cob -x program.cbl -d {oesqleb2@coboesqlebc.so | oesqleb2@coboesqlebc64.so}
Where program.cbl is the name of your COBOL program file.
When using Oracle's ODBC driver, array fetches and some scrolling fetches might produce inconsistent behavior if you change the array size between fetches. To overcome this, build your application with SQL(NORESULTARRAY). When this is set, OpenESQL performs single row fetches under the covers, bypassing this limitation.