ABAP Select data from SAP table WCHECK_V_H into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WCHECK_V_H
*  INTO TABLE @DATA(IT_WCHECK_V_H2).
*--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_WCHECK_V_H INDEX 1 INTO DATA(WA_WCHECK_V_H2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WCHECK_V_H>-WCHECK_OBJ = 1.
<WCHECK_V_H>-WCHECK_TXT = 1.
<WCHECK_V_H>-OBJNR = 1.
<WCHECK_V_H>-WCHECK_O = 1.
<WCHECK_V_H>-WCHECK_I = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WCHECK_V_H-WAGET_I, sy-vline,
  WA_WCHECK_V_H-WAGET_O, sy-vline,
  WA_WCHECK_V_H-GAERB_I, sy-vline,
  WA_WCHECK_V_H-GAERB_O, sy-vline,
  WA_WCHECK_V_H-MGANR_OUT, sy-vline,
  WA_WCHECK_V_H-MGANR_OUT_TXT40, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WCHECK_V_H 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_WCHECK_V_H 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_WCHECK_V_H INTO WA_WCHECK_V_H.


*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 ALPHA, internal->external for field MGANR_OUT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-MGANR_OUT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-MGANR_OUT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MGANR_IN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-MGANR_IN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-MGANR_IN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLMA
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-TPLMA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-TPLMA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MGANR_OUT_TP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-MGANR_OUT_TP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-MGANR_OUT_TP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MGANR_IN_TP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-MGANR_IN_TP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-MGANR_IN_TP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HEQUI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-HEQUI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-HEQUI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MGANR_OUT_EQ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-MGANR_OUT_EQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-MGANR_OUT_EQ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MGANR_IN_EQ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WCHECK_V_H-MGANR_IN_EQ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WCHECK_V_H-MGANR_IN_EQ.
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_WCHECK_V_H_STR, 
WCHECK_OBJ TYPE STRING,
WCHECK_TXT TYPE STRING,
OBJNR TYPE STRING,
WCHECK_O TYPE STRING,
WCHECK_I TYPE STRING,
WAGET_I TYPE STRING,
WAGET_O TYPE STRING,
GAERB_I TYPE STRING,
GAERB_O TYPE STRING,
MGANR_OUT TYPE STRING,
MGANR_OUT_TXT40 TYPE STRING,
MGANR_IN TYPE STRING,
MGANR_IN_TXT40 TYPE STRING,
TPLMA TYPE STRING,
PLTXT TYPE STRING,
WCHECK_O_TP TYPE STRING,
WCHECK_I_TP TYPE STRING,
MGANR_OUT_TP TYPE STRING,
MGANR_OUT_TXT40_TP TYPE STRING,
MGANR_IN_TP TYPE STRING,
MGANR_IN_TXT40_TP TYPE STRING,
HEQUI TYPE STRING,
HETXT TYPE STRING,
WCHECK_I_EQ TYPE STRING,
WCHECK_O_EQ TYPE STRING,
MGANR_OUT_EQ TYPE STRING,
MGANR_OUT_TXT40_EQ TYPE STRING,
MGANR_IN_EQ TYPE STRING,
MGANR_IN_TXT40_EQ TYPE STRING,
GWLDT_O TYPE STRING,
GWLEN_O TYPE STRING,
GWLDT_I TYPE STRING,
GWLEN_I TYPE STRING,
GWLDT_O_TP TYPE STRING,
GWLEN_O_TP TYPE STRING,
GWLDT_I_TP TYPE STRING,
GWLEN_I_TP TYPE STRING,
GWLDT_O_EQ TYPE STRING,
GWLEN_O_EQ TYPE STRING,
GWLDT_I_EQ TYPE STRING,
GWLEN_I_EQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WCHECK_V_H_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_WCHECK_V_H_STR-WCHECK_OBJ sy-vline 
WA_WCHECK_V_H_STR-WCHECK_TXT sy-vline 
WA_WCHECK_V_H_STR-OBJNR sy-vline 
WA_WCHECK_V_H_STR-WCHECK_O sy-vline 
WA_WCHECK_V_H_STR-WCHECK_I sy-vline 
WA_WCHECK_V_H_STR-WAGET_I sy-vline 
WA_WCHECK_V_H_STR-WAGET_O sy-vline 
WA_WCHECK_V_H_STR-GAERB_I sy-vline 
WA_WCHECK_V_H_STR-GAERB_O sy-vline 
WA_WCHECK_V_H_STR-MGANR_OUT sy-vline 
WA_WCHECK_V_H_STR-MGANR_OUT_TXT40 sy-vline 
WA_WCHECK_V_H_STR-MGANR_IN sy-vline 
WA_WCHECK_V_H_STR-MGANR_IN_TXT40 sy-vline 
WA_WCHECK_V_H_STR-TPLMA sy-vline 
WA_WCHECK_V_H_STR-PLTXT sy-vline 
WA_WCHECK_V_H_STR-WCHECK_O_TP sy-vline 
WA_WCHECK_V_H_STR-WCHECK_I_TP sy-vline 
WA_WCHECK_V_H_STR-MGANR_OUT_TP sy-vline 
WA_WCHECK_V_H_STR-MGANR_OUT_TXT40_TP sy-vline 
WA_WCHECK_V_H_STR-MGANR_IN_TP sy-vline 
WA_WCHECK_V_H_STR-MGANR_IN_TXT40_TP sy-vline 
WA_WCHECK_V_H_STR-HEQUI sy-vline 
WA_WCHECK_V_H_STR-HETXT sy-vline 
WA_WCHECK_V_H_STR-WCHECK_I_EQ sy-vline 
WA_WCHECK_V_H_STR-WCHECK_O_EQ sy-vline 
WA_WCHECK_V_H_STR-MGANR_OUT_EQ sy-vline 
WA_WCHECK_V_H_STR-MGANR_OUT_TXT40_EQ sy-vline 
WA_WCHECK_V_H_STR-MGANR_IN_EQ sy-vline 
WA_WCHECK_V_H_STR-MGANR_IN_TXT40_EQ sy-vline 
WA_WCHECK_V_H_STR-GWLDT_O sy-vline 
WA_WCHECK_V_H_STR-GWLEN_O sy-vline 
WA_WCHECK_V_H_STR-GWLDT_I sy-vline 
WA_WCHECK_V_H_STR-GWLEN_I sy-vline 
WA_WCHECK_V_H_STR-GWLDT_O_TP sy-vline 
WA_WCHECK_V_H_STR-GWLEN_O_TP sy-vline 
WA_WCHECK_V_H_STR-GWLDT_I_TP sy-vline 
WA_WCHECK_V_H_STR-GWLEN_I_TP sy-vline 
WA_WCHECK_V_H_STR-GWLDT_O_EQ sy-vline 
WA_WCHECK_V_H_STR-GWLEN_O_EQ sy-vline 
WA_WCHECK_V_H_STR-GWLDT_I_EQ sy-vline 
WA_WCHECK_V_H_STR-GWLEN_I_EQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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