( AT NEW andĪT END OF cause the previous table line to be compared, Statements is not well- defined at present. , since the interplay between conditional LOOP and AT If you only intend to work on the table under certain conditions (if you have used a FROM, TO, or This rule also applies to passing a table as a CHANGING VALUE parameter. You cannot change a complete internal table by using a loop on it. Operation (such as passing an entry as a CHANGING parameter) would cause a runtime error. This would then mean that any modifying operation (such as Of a table of the SORTED or HASHED TABLE - otherwise, the table may not be sorted correctly. However, you must not manipulate the key components Working directly on the internal table entries. If you use the ASSIGNING addition, you are The statement LOOP AT also fills the systemĪfter the table has been filled with data (using APPEND), it is then output: The loop was not executed, either because there was no entry at all or because there was no entry which satisfied the conditions.
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The return code value of SY-SUBRC specifies whether the loop was actually processed.
Loop processing altogether, you use EXIT.Īt the end of loop processing (that is after ENDLOOP), Statement to leave the current loop pass prematurely and continue with the next loop pass. On internal tables, there are special control break control structures for The system exits a LOOP, the index field SY-TABIXĪlways has the same value it had before the loop was processed.Īnd/or deleting lines in a LOOP affects subsequent No logical index, SY-TABIX is always set to 0. Processes entries in the order in which they were inserted into the table. The system sets SY-TABIX to the logical index of the current
The system processes entries according to their sort order. Is set to the logical index of the current table entry. At the beginning of a loop pass, SY-TABIX Table has been explicitly resorted using the SORT statement: The entries occur in the loop depend on the table type specified in the table definition (unless the If the internal table is empty, all the statements between LOOP At the end of the loop, the output area displays (or the field symbol or the reference points to) the last entry selected. Or the reference variable) remains unchanged. Is empty, or if the additions prevent the system from choosing an entry, the output area (field symbol Within the loop, neither the field symbol nor If you use REFERENCE INTOĭref, the reference of the current line is put into dref. In both cases, the current table line is copied into the output area.Īvoid the costs for the copy process, you can use the additions ASSIGNINGĬases, the system directly processes the contents of the internal table. Itab INTO wa, the explicitly specified work area wa Only possible for tables with a header line). Internal table itab is used as the output area (this is
When you use LOOP AT itab, the header line of the
In a loop which begins with LOOP and ends with ENDLOOP.Įach of the internal table entries is sent to the output area in turn. Use Short Forms in Line Operations and Cannot Change an Internal Table in a Loop. The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas.
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