ABAP Select data from SAP table PIQ_DE_TRHEADER_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQ_DE_TRHEADER_EXT
*  INTO TABLE @DATA(IT_PIQ_DE_TRHEADER_EXT2).
*--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_PIQ_DE_TRHEADER_EXT INDEX 1 INTO DATA(WA_PIQ_DE_TRHEADER_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQ_DE_TRHEADER_EXT>-TRANS_GUID = 1.
<PIQ_DE_TRHEADER_EXT>-ISSUEDATE = 1.
<PIQ_DE_TRHEADER_EXT>-TRANSTYPE = 1.
<PIQ_DE_TRHEADER_EXT>-ISSEO = 1.
<PIQ_DE_TRHEADER_EXT>-TRANSEO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQ_DE_TRHEADER_EXT-TRSTATUS, sy-vline,
  WA_PIQ_DE_TRHEADER_EXT-REGPERIODFROM, sy-vline,
  WA_PIQ_DE_TRHEADER_EXT-REGPERIODTO, sy-vline,
  WA_PIQ_DE_TRHEADER_EXT-RANKING, sy-vline,
  WA_PIQ_DE_TRHEADER_EXT-SIZEOFCLASS, sy-vline,
  WA_PIQ_DE_TRHEADER_EXT-RETURNINDIC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQ_DE_TRHEADER_EXT 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_PIQ_DE_TRHEADER_EXT 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_PIQ_DE_TRHEADER_EXT INTO WA_PIQ_DE_TRHEADER_EXT.


*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.

*Conversion exit CUNIT, internal->external for field TOTEXTCREDTYPE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PIQ_DE_TRHEADER_EXT-TOTEXTCREDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PIQ_DE_TRHEADER_EXT-TOTEXTCREDTYPE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_PIQ_DE_TRHEADER_EXT_STR, 
TRANS_GUID TYPE STRING,
ISSUEDATE TYPE STRING,
TRANSTYPE TYPE STRING,
ISSEO TYPE STRING,
TRANSEO TYPE STRING,
TRSTATUS TYPE STRING,
REGPERIODFROM TYPE STRING,
REGPERIODTO TYPE STRING,
RANKING TYPE STRING,
SIZEOFCLASS TYPE STRING,
RETURNINDIC TYPE STRING,
RETURNDATE TYPE STRING,
TOTSELFGPA TYPE STRING,
TOTSELFGPASCALE TYPE STRING,
TOTEXTGPA1 TYPE STRING,
TOTEXTGPA1SCALE TYPE STRING,
TOTEXTGPA2 TYPE STRING,
TOTEXTGPA2SCALE TYPE STRING,
TOTEXTGPA3 TYPE STRING,
TOTEXTGPA3SCALE TYPE STRING,
TOTEXTATMCRED TYPE STRING,
TOTEXTGRDCRED TYPE STRING,
TOTEXTERNCRED TYPE STRING,
TOTEXTCREDTYPE TYPE STRING,
HEI TYPE STRING,
HEI_TEXT TYPE STRING,
MONTH_COUNT TYPE STRING,
COUNTY TYPE STRING,
UEQ TYPE STRING,
COUNTRY TYPE STRING,
LANDX TYPE STRING,
REGION TYPE STRING,
DE_INDICATOR TYPE STRING,
FR_INDICATOR TYPE STRING,
UEQ_INDICATOR TYPE STRING,
EXP_TYPE TYPE STRING,
MOBILITY_PROG_TYPE TYPE STRING,
PROGRAM_OBJID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQ_DE_TRHEADER_EXT_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_PIQ_DE_TRHEADER_EXT_STR-TRANS_GUID sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-ISSUEDATE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TRANSTYPE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-ISSEO sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TRANSEO sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TRSTATUS sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-REGPERIODFROM sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-REGPERIODTO sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-RANKING sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-SIZEOFCLASS sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-RETURNINDIC sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-RETURNDATE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTSELFGPA sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTSELFGPASCALE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGPA1 sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGPA1SCALE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGPA2 sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGPA2SCALE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGPA3 sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGPA3SCALE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTATMCRED sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTGRDCRED sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTERNCRED sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-TOTEXTCREDTYPE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-HEI sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-HEI_TEXT sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-MONTH_COUNT sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-COUNTY sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-UEQ sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-COUNTRY sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-LANDX sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-REGION sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-DE_INDICATOR sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-FR_INDICATOR sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-UEQ_INDICATOR sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-EXP_TYPE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-MOBILITY_PROG_TYPE sy-vline 
WA_PIQ_DE_TRHEADER_EXT_STR-PROGRAM_OBJID sy-vline      INTO ld_text SEPARATED BY SPACE.

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