Difference between "Type Any" and "Type Data"

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Hello Everybody,
Could anyone please tell me the difference between below two declarations:
Field-symbols: <lv_first> type any,
<lv_second> type data.
Edited by: Matt on Nov 6, 2008 1:34 PM

I will tell you where you can find the details;
1) Goto Tcode ABAPHELP ,enter "TYPE DATA" in the keyword and press ok,
2) In the Appearing list double click on the data, built-in generic type under sub-node ABAP Environment.
If you cannot end up finding this, please close the thread and go home :).
Regards
Karthik D

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Please see the example below, both are output the same result.
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Why is FIELD-SYMBOL is introduce in the first place?
Kindly advice with example.
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HI,
You can use field symbols to make the program more dynamic. In this example the name of a table control is substituted by a field symbol. Thus you cal call the form with any internal table, using the name of the table control as a parameter.
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Programming languages such as PASCAL and C use a dereferencing symbol
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**     In PASCAL or C, if you assign a pointer p1 to a pointer p2,
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**     Field symbols in ABAP are always dereferenced, that is,
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You declare field symbols using the FIELD-SYMBOLS statement.
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statement. All of the operations on the field symbol act on the field
assigned to it.
When you assign a field to an untyped field symbol, the field symbol
adopts the type of the field. If, on the other hand, you want to assign
a field to a typed field symbol, the type of the field and that of the
field symbol must be compatible.
A field symbol can point to any data object and from Release 4.5A,
they can also point to lines of internal tables.
The brackets (<>) are part of the syntax.
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The statement UNASSIGN <fs> sets the field symbol <fs> so
that it points to nothing. The logical expression <fs>
IS ASSIGNED is then false. The corresponding negative expression
is IF NOT <fs> IS ASSIGNED.
An unassigned field symbol <fs> behaves as a constant with
type C(1) and initial value SPACE.
MOVE <fs>
TO dest     Transfers the initial value SPACE to the variable dest
MOVE 'A' to <fs>
Not possible, since <fs> is a constant
(runtime error).
To lift a type restriction, use the CASTING addition in the
ASSIGN statement. The data object is then interpreted as though
it had the data type of the field symbol. You can also do this
with untyped field symbols using the CASTING TYPE <type> addition.
The danger with pointers is that they may point to invalid areas.
This danger is not so acute in ABAP, because the language does not
use address arithmetic (for example, in other languages, pointer p
might point to address 1024. After the statement p = p + 10, it would
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A pointer in ABAP may not point beyond a segment boundary. ABAP does
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*     Each COMMON PART
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structure where ABAP allows you to assign both within the global data
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