The LENGTH() function
Informix®
Informix provides the LENGTH()
function to count the number of bytes of a character string expression:
SELECT LENGTH("aaa"), LENGTH(col1) FROM table Informix LENGTH() does not count the
trailing blanks for CHAR or VARCHAR expressions, while Oracle
counts the trailing blanks.
Informix LENGTH() returns 0 when the
given string is empty. That means, LENGTH('')=0.
Microsoft™ SQL Server
Microsoft SQL Server supports the
LEN() function, but there are some differences with Informix LENGTH().
Do not confuse LEN() with DATALEN(), which returns the data
size used for storage (number of bytes).
Like Informix, Microsoft SQL Server ignores trailing blanks when computing the length of a string.
When passing NULL as parameter, the SQL Server LEN() function
returns NULL.
Solution
The database driver is able to replace LENGTH() by the LEN()
function name.
LENGTH() expressions can be controlled with the following FGLPROFILE
entry:dbi.database.dsname.ifxemul.length = { true | false }