ROWID columns
Informix®
When creating a table, Informix automatically adds a
ROWID integer column (applies to non-fragmented tables only).
The ROWID column is auto-filled with a unique number and can be used like a
primary key to access a given row.
Note: Informix
ROWID usage was a
common practice in the early days of Informix
4GL programming. Today it is recommended to define all your database tables with a
PRIMARY KEY to uniquely identify rows.With Informix, the SQLCA.SQLERRD[6]
register contains the ROWID of the last row affected by an INSERT,
UPDATE or DELETE statement.
Oracle® MySQL and MariaDB
MySQL and MariadDB do not support ROWIDs.
Solution
If your Genero BDL
application uses rowid columns, review the program logic to use primary keys insead. If the database
table does no define a primary key, it should be added. All references to
SQLCA.SQLERRD[6] must be removed, because this variable will not hold the
ROWID of the last modified row.
For databases where the keyword of the
rowid pseudo-column is different than "
ROWID", the translation can be controlled
with the following FGLPROFILE
entry:dbi.database.dsname.ifxemul.rowid = { true | false }