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LOOP AT itab - Short Reference

Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax

LOOP AT itab { { INTO wa } 
             | { ASSIGNING <fs> [CASTING] } 

             | { REFERENCE INTO dref } 

             | { TRANSPORTING NO FIELDS } } 

             [USING KEY key_name|(name)] 

             [ FROM idx1] [TO idx2] [WHERE log_exp|(cond_syntax) ] 

             [ GROUP BY key | ( key1 = dobj1 key2 = dobj2 ... 

                 
              [gs = GROUP SIZE] [gi = GROUP INDEX] ) 

                 [ASCENDING|DESCENDING [AS TEXT]] 

                 [WITHOUT MEMBERS] 

                [ {INTO group} 

                | {ASSIGNING <group>} 

                | {REFERENCE INTO group_ref} ] ]. 
  ... 
ENDLOOP. 

Effect

Reads an internal table itab in a loop. A restricted variant works withmesh paths.

Additions

• INTO wa
  Assigns the row (read from internal table) to a work area wa.
• ASSIGNING <fs> [CASTING]
  Assigns the row (read from internal table) to a field symbol <fs>, where casting can be performed.
• REFERENCE INTO dref
  Assigns a reference to the row (read from internal table) to a reference variable dref.
• TRANSPORTING NO FIELDS
  Row (read from internal table) is not assigned.
• USING KEY key_name|(name)
  Statically or dynamically specifies a (secondary) table key that determines the processing order.
• [FROM idx1] [TO idx2] [WHERE log_exp|(cond_syntax)]
  Restricts the rows to be read, by declaring a lower number and upper number (idx1 and idx2 in the relevant table index), or by declaring a static condition log_exp or a dynamic condition in cond_syntax.
• GROUP BY ...
  Groups the rows in the internal table by a group key and executes a loop across the groups. ASCENDING|DESCENDING sorts the groups; WITHOUT MEMBERS suppresses the grouping variant for the table rows; INTO GROUP, ASSIGNING, and REFERENCE INTO define the output behavior of the group loop.