ABAP Select data from SAP table P21_VALLALAT_ADATOK 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 P21_VALLALAT_ADATOK 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 P21_VALLALAT_ADATOK. 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 P21_VALLALAT_ADATOK 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_P21_VALLALAT_ADATOK TYPE STANDARD TABLE OF P21_VALLALAT_ADATOK,
      WA_P21_VALLALAT_ADATOK TYPE P21_VALLALAT_ADATOK,
      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: <P21_VALLALAT_ADATOK> TYPE P21_VALLALAT_ADATOK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P21_VALLALAT_ADATOK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P21_VALLALAT_ADATOK
  INTO TABLE IT_P21_VALLALAT_ADATOK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P21_VALLALAT_ADATOK
*  INTO TABLE @DATA(IT_P21_VALLALAT_ADATOK2).
*--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_P21_VALLALAT_ADATOK INDEX 1 INTO DATA(WA_P21_VALLALAT_ADATOK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P21_VALLALAT_ADATOK ASSIGNING <P21_VALLALAT_ADATOK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P21_VALLALAT_ADATOK>-BUKRS = 1.
<P21_VALLALAT_ADATOK>-NEV = 1.
<P21_VALLALAT_ADATOK>-STRNR = 1.
<P21_VALLALAT_ADATOK>-CIM = 1.
<P21_VALLALAT_ADATOK>-LAND1 = 1.

ENDLOOP.

LOOP AT IT_P21_VALLALAT_ADATOK INTO WA_P21_VALLALAT_ADATOK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P21_VALLALAT_ADATOK-IRSZ, sy-vline,
  WA_P21_VALLALAT_ADATOK-HELY, sy-vline,
  WA_P21_VALLALAT_ADATOK-KOZN, sy-vline,
  WA_P21_VALLALAT_ADATOK-KOZJ, sy-vline,
  WA_P21_VALLALAT_ADATOK-HAZSZ, sy-vline,
  WA_P21_VALLALAT_ADATOK-EPUL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P21_VALLALAT_ADATOK 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_P21_VALLALAT_ADATOK 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_P21_VALLALAT_ADATOK INTO WA_P21_VALLALAT_ADATOK.


*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_P21_VALLALAT_ADATOK_STR, 
BUKRS TYPE STRING,
NEV TYPE STRING,
STRNR TYPE STRING,
CIM TYPE STRING,
LAND1 TYPE STRING,
IRSZ TYPE STRING,
HELY TYPE STRING,
KOZN TYPE STRING,
KOZJ TYPE STRING,
HAZSZ TYPE STRING,
EPUL TYPE STRING,
LEPCS TYPE STRING,
EM TYPE STRING,
AJTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P21_VALLALAT_ADATOK_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_P21_VALLALAT_ADATOK_STR-BUKRS sy-vline 
WA_P21_VALLALAT_ADATOK_STR-NEV sy-vline 
WA_P21_VALLALAT_ADATOK_STR-STRNR sy-vline 
WA_P21_VALLALAT_ADATOK_STR-CIM sy-vline 
WA_P21_VALLALAT_ADATOK_STR-LAND1 sy-vline 
WA_P21_VALLALAT_ADATOK_STR-IRSZ sy-vline 
WA_P21_VALLALAT_ADATOK_STR-HELY sy-vline 
WA_P21_VALLALAT_ADATOK_STR-KOZN sy-vline 
WA_P21_VALLALAT_ADATOK_STR-KOZJ sy-vline 
WA_P21_VALLALAT_ADATOK_STR-HAZSZ sy-vline 
WA_P21_VALLALAT_ADATOK_STR-EPUL sy-vline 
WA_P21_VALLALAT_ADATOK_STR-LEPCS sy-vline 
WA_P21_VALLALAT_ADATOK_STR-EM sy-vline 
WA_P21_VALLALAT_ADATOK_STR-AJTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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