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TYPE-POOL

Short Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax

TYPE-POOL tpool. 

Effect

The TYPE-POOL statement introduces a type group. It must be the first statement of a type group following the triggering of any include programs. You can maintain type groups only in ABAP Dictionary in ABAP Workbench, whereby an ABAP program is automatically generated including the TYPE-POOL statement. The actual name of the program of a type group in the repository does not completely match the name of the type group and is of internal relevance only.

Type groups can only contain the statements

• INCLUDE,
• INCLUDE TYPE|STRUCTURE,
• TYPES,
• CONSTANTS,
• DEFINE, and END-OF-DEFINITION,
• CLASS DEFINITION ... DEFERRED PUBLIC
  

and the declared data types, constants, and macros must be prefixed with the name tpool of the type group. The elements declared in a type group can be addressed statically or dynamically by name in every ABAP program in which the type group can be used. This is loaded when an element of a type group is first accessed.

Notes

• Types in type groups are the predecessors for general type definitions in ABAP Dictionary.
• Since you can also define data types and constants in the public visibility section of global classes, type groups are obsolete and should no longer be created. Existing type groups can still be used.
• To avoid conflicts in the type reference with the addition LIKE, you must ensure that constants in type groups do not have the same name as existing flat structures or database tables in ABAP Dictionary.
• The name of a type group may contain a maximum of five characters.
• Previously, type groups had to be made known in ABAP programs using the TYPE-POOLS statement before its elements could be accessed statically or dynamically. This restriction is now obsolete. The TYPE-POOLS statement is no longer necessary.
  

Example

Type groups with the definition of a table type.

TYPE-POOL mytgr.
TYPES mytgr_spfli_tab TYPE HASHED TABLE
                      OF spfli
                      WITH UNIQUE KEY carrid connid.