PLS-00488: invalid variable declaration: object 'string'
must be a type or subtype
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Answer / guest
Cause: The datatype specifier in a variable declaration does
not designate a legal type. For example, the %TYPE attribute
might not have been added to a declaration, as in DECLARE
my_sal emp.sal%TYPE; my_ename emp.ename; -- missing %TYPE
... When declaring a constant or variable, to provide the
datatype of a column automatically, use the %TYPE attribute.
Likewise, when declaring a record, to provide the datatypes
of a row automatically, use the %ROWTYPE attribute.
Action: Make sure the datatype specifier designates a legal
type. Remember to use the %TYPE and %ROWTYPE attributes when
necessary.
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