如何在abap中获取内部表的行数？

Question

How do I get the row count of an internal table? I guess that I can loop on it. But there must be a saner way.

I don't know if it makes a difference but the code should run on 4.6c version.

Answer 1

There is also a built-in function for this task:

variable = lines( itab_name ).

Just like the "pure" ABAP syntax described by IronGoofy , the function "lines( )" writes the number of lines of table itab_name into the variable.

Answer 2

You can use the following function:

 DESCRIBE TABLE <itab-Name> LINES <variable>

After the call, variable contains the number of rows of the internal table .

Answer 3

Beside the recommended

DESCRIBE TABLE <itab-Name> LINES <variable>

there is also the system variable SY-TFILL .

From documentation:

After the statements DESCRIBE TABLE, LOOP AT and READ TABLE, the number of rows of the accessed internal table.

Example script:

REPORT ytest.

DATA pf_exclude TYPE TABLE OF sy-ucomm WITH HEADER LINE.

START-OF-SELECTION.
  APPEND '1' TO pf_exclude.
  APPEND '2' TO pf_exclude.
  APPEND '3' TO pf_exclude.
  APPEND '4' TO pf_exclude.

  WRITE: / 'sy-tfill = ', sy-tfill.

  DESCRIBE TABLE pf_exclude.
  WRITE: / 'sy-tfill = ', sy-tfill, 'after describe table'.

  sy-tfill = 0. "Reset
  READ TABLE pf_exclude INDEX 1 TRANSPORTING NO FIELDS.
  WRITE: / 'sy-tfill = ', sy-tfill, 'after read table'.


  sy-tfill = 0. "Reset
  LOOP AT pf_exclude.
    WRITE: / 'sy-tfill = ', sy-tfill, 'in loop with', pf_exclude.
    sy-tfill = 0. "Reset
  ENDLOOP.

The result:

sy-tfill =           0
sy-tfill =           4  after describe tabl
sy-tfill =           4  after read table
sy-tfill =           4  in loop with 1
sy-tfill =           0  in loop with 2
sy-tfill =           0  in loop with 3
sy-tfill =           0  in loop with 4

Please get attention of the value 0 for the 2nd entry: SY-TFILL is not updated with each step, only after the first loop.

I recommend the usage SY-TFILL only, if you need it direct after the READ (1)... If there are other commands between the READ and the usage of SY-TFILL, there is always the danger of a change of the system variable.

(1) or describe table.

Answer 4

  DATA : V_LINES TYPE I. "declare variable
  DESCRIBE TABLE <ITAB> LINES V_LINES. "get no of rows
  WRITE:/ V_LINES. "display no of rows

Refreance: http://www.sapnuts.com/courses/core-abap/internal-table-work-area.html

Answer 5

The functional module EM_GET_NUMBER_OF_ENTRIES will also provide the row count. It takes 1 parameter - the table name.

Answer 6

您还可以使用 OPEN Sql 使用 COUNT Grouping 子句查找行数，并且还有系统字段 SY-LINCT 来计算表的行数（ROWS）。

Answer 7

if I understand your question correctly, you want to know the row number during a conditional loop over an internal table. You can use the system variable sy-tabix if you work with internal tables. Please refer to the ABAP documentation if you need more information (especially the chapter on internal table processing ).

Example:

LOOP AT itab INTO workarea
        WHERE tablefield = value.

     WRITE: 'This is row number ', sy-tabix.

ENDLOOP.

Answer 8

data: vcnt(4).

clear vcnt.

LOOP at itab WHERE value = '1'.
  add 1 to vcnt.
ENDLOOP.

The answer will be 3. (vcnt = 3).

Answer 9

I don't think there is a SAP parameter for that kind of result. Though the code below will deliver.

LOOP AT intTab.

  AT END OF value.

    result = sy-tabix.

    write result.  

  ENDAT.

ENDLOOP.