In my oldest PL/SQL-Library in Forms 4 my first procedures were:
PROCEDURE Inc (P_Number IN OUT NUMBER) IS BEGIN P_Number := P_Number + 1; END; PROCEDURE Dec (P_Number IN OUT NUMBER) IS BEGIN P_Number := P_Number - 1; END;In some variations with one or two parameters I used this Increment and Decrement since 20 years! Without having trouble in all the days.
Now I found out, that DEC isn't working in newer Oracle Forms versions...
And why? Oracle created in PL/SQL a new SUBTYPE of DECIMAL and it is called "DEC". So you can use it in this way:
DECLARE V_Value DEC; BEGIN ...
And this behaviour kills my procedure in the PL/SQL-Library :-(
All other languages know INC and DEC for incrementing and decrementing. Not Oracle!
Be careful when creating new functions which you want to use for a long time :-)