ABAP Select data from SAP table TEMP21PG4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TEMP21PG4 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 TEMP21PG4. 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 TEMP21PG4 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_TEMP21PG4 TYPE STANDARD TABLE OF TEMP21PG4,
      WA_TEMP21PG4 TYPE TEMP21PG4,
      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: <TEMP21PG4> TYPE TEMP21PG4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TEMP21PG4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TEMP21PG4
  INTO TABLE IT_TEMP21PG4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TEMP21PG4
*  INTO TABLE @DATA(IT_TEMP21PG42).
*--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_TEMP21PG4 INDEX 1 INTO DATA(WA_TEMP21PG42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TEMP21PG4 ASSIGNING <TEMP21PG4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TEMP21PG4>-PERNRPG4 = 1.
<TEMP21PG4>-BEGDA_YRMIN0 = 1.
<TEMP21PG4>-ENDDA_YRMIN0 = 1.
<TEMP21PG4>-BEGDA_YRMIN1 = 1.
<TEMP21PG4>-ENDDA_YRMIN1 = 1.

ENDLOOP.

LOOP AT IT_TEMP21PG4 INTO WA_TEMP21PG4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TEMP21PG4-BEGDA_YRMIN2, sy-vline,
  WA_TEMP21PG4-ENDDA_YRMIN2, sy-vline,
  WA_TEMP21PG4-ITEMC1_PERSONS, sy-vline,
  WA_TEMP21PG4-ITEMC1_DAYS, sy-vline,
  WA_TEMP21PG4-ITEMC1_YRMIN0, sy-vline,
  WA_TEMP21PG4-ITEMC1_YRMIN1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TEMP21PG4 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_TEMP21PG4 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_TEMP21PG4 INTO WA_TEMP21PG4.


*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_TEMP21PG4_STR, 
PERNRPG4 TYPE STRING,
BEGDA_YRMIN0 TYPE STRING,
ENDDA_YRMIN0 TYPE STRING,
BEGDA_YRMIN1 TYPE STRING,
ENDDA_YRMIN1 TYPE STRING,
BEGDA_YRMIN2 TYPE STRING,
ENDDA_YRMIN2 TYPE STRING,
ITEMC1_PERSONS TYPE STRING,
ITEMC1_DAYS TYPE STRING,
ITEMC1_YRMIN0 TYPE STRING,
ITEMC1_YRMIN1 TYPE STRING,
ITEMC1_YRMIN2 TYPE STRING,
ITEMC2_PERSONS TYPE STRING,
ITEMC2_DAYS TYPE STRING,
ITEMC2_YRMIN0 TYPE STRING,
ITEMC2_YRMIN1 TYPE STRING,
ITEMC2_YRMIN2 TYPE STRING,
ITEMC3_PERSONS TYPE STRING,
ITEMC3_DAYS TYPE STRING,
ITEMC3_YRMIN0 TYPE STRING,
ITEMC3_YRMIN1 TYPE STRING,
ITEMC3_YRMIN2 TYPE STRING,
ITEMC4_PERSONS TYPE STRING,
ITEMC4_DAYS TYPE STRING,
ITEMC4_YRMIN0 TYPE STRING,
ITEMC4_YRMIN1 TYPE STRING,
ITEMC4_YRMIN2 TYPE STRING,
ITEMC5_PERSONS TYPE STRING,
ITEMC5_DAYS TYPE STRING,
ITEMC5_YRMIN0 TYPE STRING,
ITEMC5_YRMIN1 TYPE STRING,
ITEMC5_YRMIN2 TYPE STRING,
ITEMC6_YRMIN0 TYPE STRING,
ITEMC6_YRMIN1 TYPE STRING,
ITEMC6_YRMIN2 TYPE STRING,
ITEMC7_YRMIN0 TYPE STRING,
ITEMC7_YRMIN1 TYPE STRING,
ITEMD1_OHQYES TYPE STRING,
ITEMD1_OHQNO TYPE STRING,
ITEMD1_YRMIN0 TYPE STRING,
ITEMD1_YRMIN1 TYPE STRING,
ITEMD1_YRMIN2 TYPE STRING,
ITEMD2_YRMIN0 TYPE STRING,
ITEMD2_YRMIN1 TYPE STRING,
ITEMD2_YRMIN2 TYPE STRING,
ITEMD3_YRMIN0 TYPE STRING,
ITEMD3_YRMIN1 TYPE STRING,
ITEMD3_YRMIN2 TYPE STRING,
ITEMD4_YRMIN0 TYPE STRING,
ITEMD4_YRMIN1 TYPE STRING,
ITEMD4_YRMIN2 TYPE STRING,
ITEMD5_YRMIN0 TYPE STRING,
ITEMD5_YRMIN1 TYPE STRING,
ITEMD5_YRMIN2 TYPE STRING,
ITEMD6_YRMIN0 TYPE STRING,
ITEMD6_YRMIN1 TYPE STRING,
ITEMD6_YRMIN2 TYPE STRING,
ITEMD7_YRMIN0 TYPE STRING,
ITEMD7_YRMIN1 TYPE STRING,
ITEMD7_YRMIN2 TYPE STRING,
ITEMD8_YRMIN0 TYPE STRING,
ITEMD8_YRMIN1 TYPE STRING,
ITEMD8_YRMIN2 TYPE STRING,
ITEMD9_YRMIN0 TYPE STRING,
ITEMD9_YRMIN1 TYPE STRING,
ITEMD9_YRMIN2 TYPE STRING,
ITEMD10_YRMIN0 TYPE STRING,
ITEMD10_YRMIN1 TYPE STRING,
ITEMD10_YRMIN2 TYPE STRING,
ITEMD11_YRMIN0 TYPE STRING,
ITEMD11_YRMIN1 TYPE STRING,
ITEMD11_YRMIN2 TYPE STRING,
ITEMD12_YRMIN0 TYPE STRING,
ITEMD12_YRMIN1 TYPE STRING,
ITEMD12_YRMIN2 TYPE STRING,
TOTAL_YRMIN0 TYPE STRING,
TOTAL_YRMIN1 TYPE STRING,
TOTAL_YRMIN2 TYPE STRING,
AUTH_PERS_NAME TYPE STRING,
AUTH_PERS_DESIGN TYPE STRING,
DECLARATION_DATE TYPE STRING,
CONT_PERS_NAME TYPE STRING,
CONT_PERS_PHONE TYPE STRING,
CONT_PERS_PAGER TYPE STRING,
CONT_PERS_FAX TYPE STRING,
CONT_PERS_EMAIL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TEMP21PG4_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_TEMP21PG4_STR-PERNRPG4 sy-vline 
WA_TEMP21PG4_STR-BEGDA_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ENDDA_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-BEGDA_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ENDDA_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-BEGDA_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ENDDA_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC1_PERSONS sy-vline 
WA_TEMP21PG4_STR-ITEMC1_DAYS sy-vline 
WA_TEMP21PG4_STR-ITEMC1_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC1_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMC1_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC2_PERSONS sy-vline 
WA_TEMP21PG4_STR-ITEMC2_DAYS sy-vline 
WA_TEMP21PG4_STR-ITEMC2_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC2_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMC2_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC3_PERSONS sy-vline 
WA_TEMP21PG4_STR-ITEMC3_DAYS sy-vline 
WA_TEMP21PG4_STR-ITEMC3_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC3_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMC3_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC4_PERSONS sy-vline 
WA_TEMP21PG4_STR-ITEMC4_DAYS sy-vline 
WA_TEMP21PG4_STR-ITEMC4_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC4_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMC4_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC5_PERSONS sy-vline 
WA_TEMP21PG4_STR-ITEMC5_DAYS sy-vline 
WA_TEMP21PG4_STR-ITEMC5_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC5_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMC5_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC6_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC6_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMC6_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMC7_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMC7_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD1_OHQYES sy-vline 
WA_TEMP21PG4_STR-ITEMD1_OHQNO sy-vline 
WA_TEMP21PG4_STR-ITEMD1_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD1_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD1_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD2_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD2_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD2_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD3_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD3_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD3_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD4_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD4_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD4_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD5_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD5_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD5_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD6_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD6_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD6_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD7_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD7_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD7_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD8_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD8_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD8_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD9_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD9_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD9_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD10_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD10_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD10_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD11_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD11_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD11_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-ITEMD12_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-ITEMD12_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-ITEMD12_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-TOTAL_YRMIN0 sy-vline 
WA_TEMP21PG4_STR-TOTAL_YRMIN1 sy-vline 
WA_TEMP21PG4_STR-TOTAL_YRMIN2 sy-vline 
WA_TEMP21PG4_STR-AUTH_PERS_NAME sy-vline 
WA_TEMP21PG4_STR-AUTH_PERS_DESIGN sy-vline 
WA_TEMP21PG4_STR-DECLARATION_DATE sy-vline 
WA_TEMP21PG4_STR-CONT_PERS_NAME sy-vline 
WA_TEMP21PG4_STR-CONT_PERS_PHONE sy-vline 
WA_TEMP21PG4_STR-CONT_PERS_PAGER sy-vline 
WA_TEMP21PG4_STR-CONT_PERS_FAX sy-vline 
WA_TEMP21PG4_STR-CONT_PERS_EMAIL sy-vline      INTO ld_text SEPARATED BY SPACE.

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