ABAP Select data from SAP table ALPERFCL_I into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP ALPERFCL_I table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ALPERFCL_I. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ALPERFCL_I table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ALPERFCL_I TYPE STANDARD TABLE OF ALPERFCL_I,
      WA_ALPERFCL_I TYPE ALPERFCL_I,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ALPERFCL_I> TYPE ALPERFCL_I.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ALPERFCL_I.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ALPERFCL_I
  INTO TABLE IT_ALPERFCL_I.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ALPERFCL_I
*  INTO TABLE @DATA(IT_ALPERFCL_I2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ALPERFCL_I INDEX 1 INTO DATA(WA_ALPERFCL_I2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ALPERFCL_I ASSIGNING <ALPERFCL_I>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ALPERFCL_I>-LASTUPDT = 1.
<ALPERFCL_I>-NBROFDAY = 1.
<ALPERFCL_I>-AVGDAYCNT = 1.
<ALPERFCL_I>-AVGDAYSUM = 1.
<ALPERFCL_I>-H00CNT = 1.

ENDLOOP.

LOOP AT IT_ALPERFCL_I INTO WA_ALPERFCL_I.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ALPERFCL_I-H00SUM, sy-vline,
  WA_ALPERFCL_I-H01CNT, sy-vline,
  WA_ALPERFCL_I-H01SUM, sy-vline,
  WA_ALPERFCL_I-H02CNT, sy-vline,
  WA_ALPERFCL_I-H02SUM, sy-vline,
  WA_ALPERFCL_I-H03CNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ALPERFCL_I you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ALPERFCL_I TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ALPERFCL_I INTO WA_ALPERFCL_I.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ALPERFCL_I_STR, 
LASTUPDT TYPE STRING,
NBROFDAY TYPE STRING,
AVGDAYCNT TYPE STRING,
AVGDAYSUM TYPE STRING,
H00CNT TYPE STRING,
H00SUM TYPE STRING,
H01CNT TYPE STRING,
H01SUM TYPE STRING,
H02CNT TYPE STRING,
H02SUM TYPE STRING,
H03CNT TYPE STRING,
H03SUM TYPE STRING,
H04CNT TYPE STRING,
H04SUM TYPE STRING,
H05CNT TYPE STRING,
H05SUM TYPE STRING,
H05AVG TYPE STRING,
H06CNT TYPE STRING,
H06SUM TYPE STRING,
H07CNT TYPE STRING,
H07SUM TYPE STRING,
H08CNT TYPE STRING,
H08SUM TYPE STRING,
H09CNT TYPE STRING,
H09SUM TYPE STRING,
H10CNT TYPE STRING,
H10SUM TYPE STRING,
H11CNT TYPE STRING,
H11SUM TYPE STRING,
H12CNT TYPE STRING,
H12SUM TYPE STRING,
H13CNT TYPE STRING,
H13SUM TYPE STRING,
H14CNT TYPE STRING,
H14SUM TYPE STRING,
H15CNT TYPE STRING,
H15SUM TYPE STRING,
H16CNT TYPE STRING,
H16SUM TYPE STRING,
H17CNT TYPE STRING,
H17SUM TYPE STRING,
H18CNT TYPE STRING,
H18SUM TYPE STRING,
H19CNT TYPE STRING,
H19SUM TYPE STRING,
H20CNT TYPE STRING,
H20SUM TYPE STRING,
H21CNT TYPE STRING,
H21SUM TYPE STRING,
H22CNT TYPE STRING,
H22SUM TYPE STRING,
H23CNT TYPE STRING,
H23SUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ALPERFCL_I_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ALPERFCL_I_STR-LASTUPDT sy-vline 
WA_ALPERFCL_I_STR-NBROFDAY sy-vline 
WA_ALPERFCL_I_STR-AVGDAYCNT sy-vline 
WA_ALPERFCL_I_STR-AVGDAYSUM sy-vline 
WA_ALPERFCL_I_STR-H00CNT sy-vline 
WA_ALPERFCL_I_STR-H00SUM sy-vline 
WA_ALPERFCL_I_STR-H01CNT sy-vline 
WA_ALPERFCL_I_STR-H01SUM sy-vline 
WA_ALPERFCL_I_STR-H02CNT sy-vline 
WA_ALPERFCL_I_STR-H02SUM sy-vline 
WA_ALPERFCL_I_STR-H03CNT sy-vline 
WA_ALPERFCL_I_STR-H03SUM sy-vline 
WA_ALPERFCL_I_STR-H04CNT sy-vline 
WA_ALPERFCL_I_STR-H04SUM sy-vline 
WA_ALPERFCL_I_STR-H05CNT sy-vline 
WA_ALPERFCL_I_STR-H05SUM sy-vline 
WA_ALPERFCL_I_STR-H05AVG sy-vline 
WA_ALPERFCL_I_STR-H06CNT sy-vline 
WA_ALPERFCL_I_STR-H06SUM sy-vline 
WA_ALPERFCL_I_STR-H07CNT sy-vline 
WA_ALPERFCL_I_STR-H07SUM sy-vline 
WA_ALPERFCL_I_STR-H08CNT sy-vline 
WA_ALPERFCL_I_STR-H08SUM sy-vline 
WA_ALPERFCL_I_STR-H09CNT sy-vline 
WA_ALPERFCL_I_STR-H09SUM sy-vline 
WA_ALPERFCL_I_STR-H10CNT sy-vline 
WA_ALPERFCL_I_STR-H10SUM sy-vline 
WA_ALPERFCL_I_STR-H11CNT sy-vline 
WA_ALPERFCL_I_STR-H11SUM sy-vline 
WA_ALPERFCL_I_STR-H12CNT sy-vline 
WA_ALPERFCL_I_STR-H12SUM sy-vline 
WA_ALPERFCL_I_STR-H13CNT sy-vline 
WA_ALPERFCL_I_STR-H13SUM sy-vline 
WA_ALPERFCL_I_STR-H14CNT sy-vline 
WA_ALPERFCL_I_STR-H14SUM sy-vline 
WA_ALPERFCL_I_STR-H15CNT sy-vline 
WA_ALPERFCL_I_STR-H15SUM sy-vline 
WA_ALPERFCL_I_STR-H16CNT sy-vline 
WA_ALPERFCL_I_STR-H16SUM sy-vline 
WA_ALPERFCL_I_STR-H17CNT sy-vline 
WA_ALPERFCL_I_STR-H17SUM sy-vline 
WA_ALPERFCL_I_STR-H18CNT sy-vline 
WA_ALPERFCL_I_STR-H18SUM sy-vline 
WA_ALPERFCL_I_STR-H19CNT sy-vline 
WA_ALPERFCL_I_STR-H19SUM sy-vline 
WA_ALPERFCL_I_STR-H20CNT sy-vline 
WA_ALPERFCL_I_STR-H20SUM sy-vline 
WA_ALPERFCL_I_STR-H21CNT sy-vline 
WA_ALPERFCL_I_STR-H21SUM sy-vline 
WA_ALPERFCL_I_STR-H22CNT sy-vline 
WA_ALPERFCL_I_STR-H22SUM sy-vline 
WA_ALPERFCL_I_STR-H23CNT sy-vline 
WA_ALPERFCL_I_STR-H23SUM sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.