Keywords and user-defined identifiers that are used in an SPL program are not case-sensitive.
DBMS_OUTPUT.PUT_LINE('Hello World'); is interpreted as the same content as
Dbms_Output.Put_Line('HelloWorld');, or D
Character and string constants are case-sensitive. Data retrieved from PolarDB-O or
obtained from other external sources is also case-sensitive. The
DBMS_OUTPUT.PUT_LINE('Hello World!') ; statement generates the following output:
DBMS_OUTPUT.PUT_LINE('HELLO WORLD!') ; statement generates the following output: