topic Re: Type-pools in Application Development and Automation Discussions

Type-pools

Former Member — Wed, 27 Jun 2007 06:47:22 GMT

hi all,

what is Type-Pools?

what it contains?

thanks

Re: Type-pools

former_member189629 — Wed, 27 Jun 2007 06:49:09 GMT

Hi Sanjeev,

Type pools Includes the types and constants of a type group. If thetype group tpool has already been included, the statement isignored. You can only maintain a type group via the ABAP Dictionary (using Transaction SE11). You introduce a type group withthe TYPE-POOL statement. Since thetypes and constants specified in a type group have global validity, youcannot use the statement within a FORM or FUNCTION.

Example

TYPE-POOLS VERI1.

DATA X TYPE VERI1_TYP1.

Regards,

Karthik

PS: Reward points if helpful

Re: Type-pools

Former Member — Wed, 27 Jun 2007 06:49:36 GMT

Hi,

TYPE-POOLS tpool.

Effect

Declaring global data types and constants from a type group.

The TYPE-POOLS statement declares the data types and constants of type group tpool You can specify it in the global data declarations of an ABAP program or in the declaration section of a class or interface. The data types and constants of the type group are visible as of this statement in the current context.

Notes

If the declared type group tpool integrates a further type group with the TYPE-POOLS statement, its data types and constants are also declared.

,,Data types declared using type groups cover ABAP Dictionary data types of the same name.

Example

Declaration of the predefined type group abap. By referring to the table type abap_func_parmbind_tab from the type group abap, the system declares an internal table parameter_tab for the dynamic parameter transfer to function modules.

TYPE-POOLS abap.

DATA parameter_tab TYPE abap_func_parmbind_tab.

also check this link

http://sap.niraj.tripod.com/id26.html

Regards,

Priyanka.

Re: Type-pools

Former Member — Wed, 27 Jun 2007 06:50:44 GMT

Hi,

Type Groups

Before Release 4.5A, it was not possible to define standalone types in the ABAP Dictionary to which you could refer using a TYPE addition in an ABAP program. It was only possible to refer to flat structures. Structures in programs corresponded to the structures of database tables or structures in the ABAP Dictionary. In ABAP programs, you could only refer to database tables and structures in the ABAP Dictionary using LIKE. It was, however, possible to refer to individual components of the Dictionary type. Complex local data types such as internal tables or deep structures had no equivalent in the ABAP Dictionary. The solution to this from Release 3.0 onwards was to use type groups. Type groups were based on the include technique, and allowed you to store any type definitions globally in the Dictionary by defining them using TYPES statements.

The definition of a type group is a fragment of ABAP code which you enter in the ABAP Editor. The first statement for the type group <pool> is always:

TYPE-POOL <pool>.

After this came the definitions of data types using the TYPES statement, as described in Local Data Types in Programs. It was also possible to define global constants using the CONSTANTS statement. All the names of these data types and constants must begin with the name of the type group and an underscore:

In an ABAP program, you must declare a type group as follows before you can use it:

TYPE-POOLS <pool>.

This statement allows you to use all the data types and constants defined in the type group <pool> in your program. You can use several type groups in the same program.

Let the type group HKTST be created as follows in the ABAP Dictionary:

TYPE-POOL hktst.

TYPES: BEGIN OF hktst_typ1,

col1(10) TYPE c,

col2 TYPE i,

END OF hktst_typ1.

TYPES hktst_typ2 TYPE p DECIMALS 2.

CONSTANTS hktst_eleven TYPE i VALUE 11.

This type group defines two data types HKTST_TYP1 and HKTST_TYP2, as well as a constant HKTST_ELEVEN with the value 11.

Any ABAP program can use this definition with the TYPE-POOLS statement:

TYPE-POOLS hktst.

DATA: dat1 TYPE hktst_typ1,

dat2 TYPE hktst_typ2 VALUE '1.23'.

WRITE: dat2, / hktst_eleven.

The output is:

1,23

The data types defined in the type group are used to declare data objects with the DATA statement and the value of the constant is, as the output shows, known in the program.

Thanks.

Re: Type-pools

Former Member — Wed, 27 Jun 2007 06:52:28 GMT

HI Sanjeev,

Type pool is a keyword used to attach a typegroup to a program.

once a typegroup is linked to a program so that all the type declarations of that type group are avial to the program...

Eg : SLIS....try this by checking in SE11 - give SLIS and enter ..u can see many type declarations under SLIS....

u wil come to know about it when u work in ALV reporting....

Regards..

BALAJI ( Assign points if this is useful)

Re: Type-pools

jayanthi_jayaraman — Wed, 27 Jun 2007 07:01:23 GMT

Hi,

Go to SE11 and create type group zztyp(for example).

TYPE-POOL ZZTYP .

types : <b>zztyp_</b>dollars(5) type p decimals 2.

constants : <b>zztyp_</b>date like sy-datum value '20061213'.

Activate it.Rememeber the declaration should start with type-pool name _.

Go to SE38 and create a program with following code.

type-pools zztyp.

data v1 type zztyp_dollars.

write zztyp_date.

Hope now you understand how trype-pool is used.Usually in calssical alv programs,you had seen slis type-pool.

Re: Type-pools

Former Member — Wed, 27 Jun 2007 07:19:37 GMT

Hi,

type type pools on the editor screen and press f1 function key u will get required information .

regards

Suprith

Re: Type-pools

Former Member — Wed, 27 Jun 2007 08:10:57 GMT

thanks for the efforts.

i have awarded all ur efforts.