ABAP Select data from SAP table P01C_GUMWA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01C_GUMWA 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 P01C_GUMWA. 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 P01C_GUMWA 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_P01C_GUMWA TYPE STANDARD TABLE OF P01C_GUMWA,
      WA_P01C_GUMWA TYPE P01C_GUMWA,
      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: <P01C_GUMWA> TYPE P01C_GUMWA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01C_GUMWA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01C_GUMWA
  INTO TABLE IT_P01C_GUMWA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01C_GUMWA
*  INTO TABLE @DATA(IT_P01C_GUMWA2).
*--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_P01C_GUMWA INDEX 1 INTO DATA(WA_P01C_GUMWA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01C_GUMWA ASSIGNING <P01C_GUMWA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01C_GUMWA>-METH1 = 1.
<P01C_GUMWA>-LGAG1 = 1.
<P01C_GUMWA>-VBEL1 = 1.
<P01C_GUMWA>-VBEE1 = 1.
<P01C_GUMWA>-SBEL1 = 1.

ENDLOOP.

LOOP AT IT_P01C_GUMWA INTO WA_P01C_GUMWA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01C_GUMWA-SBEE1, sy-vline,
  WA_P01C_GUMWA-PROL1, sy-vline,
  WA_P01C_GUMWA-PROE1, sy-vline,
  WA_P01C_GUMWA-METH2, sy-vline,
  WA_P01C_GUMWA-LGAG2, sy-vline,
  WA_P01C_GUMWA-VBEL2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01C_GUMWA 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_P01C_GUMWA 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_P01C_GUMWA INTO WA_P01C_GUMWA.


*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_P01C_GUMWA_STR, 
METH1 TYPE STRING,
LGAG1 TYPE STRING,
VBEL1 TYPE STRING,
VBEE1 TYPE STRING,
SBEL1 TYPE STRING,
SBEE1 TYPE STRING,
PROL1 TYPE STRING,
PROE1 TYPE STRING,
METH2 TYPE STRING,
LGAG2 TYPE STRING,
VBEL2 TYPE STRING,
VBEE2 TYPE STRING,
SBEL2 TYPE STRING,
SBEE2 TYPE STRING,
PROL2 TYPE STRING,
PROE2 TYPE STRING,
METH3 TYPE STRING,
LGAG3 TYPE STRING,
VBEL3 TYPE STRING,
VBEE3 TYPE STRING,
SBEL3 TYPE STRING,
SBEE3 TYPE STRING,
PROL3 TYPE STRING,
PROE3 TYPE STRING,
METH4 TYPE STRING,
LGAG4 TYPE STRING,
VBEL4 TYPE STRING,
VBEE4 TYPE STRING,
SBEL4 TYPE STRING,
SBEE4 TYPE STRING,
PROL4 TYPE STRING,
PROE4 TYPE STRING,
METH5 TYPE STRING,
LGAG5 TYPE STRING,
VBEL5 TYPE STRING,
VBEE5 TYPE STRING,
SBEL5 TYPE STRING,
SBEE5 TYPE STRING,
PROL5 TYPE STRING,
PROE5 TYPE STRING,
METH6 TYPE STRING,
LGAG6 TYPE STRING,
VBEL6 TYPE STRING,
VBEE6 TYPE STRING,
SBEL6 TYPE STRING,
SBEE6 TYPE STRING,
PROL6 TYPE STRING,
PROE6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01C_GUMWA_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_P01C_GUMWA_STR-METH1 sy-vline 
WA_P01C_GUMWA_STR-LGAG1 sy-vline 
WA_P01C_GUMWA_STR-VBEL1 sy-vline 
WA_P01C_GUMWA_STR-VBEE1 sy-vline 
WA_P01C_GUMWA_STR-SBEL1 sy-vline 
WA_P01C_GUMWA_STR-SBEE1 sy-vline 
WA_P01C_GUMWA_STR-PROL1 sy-vline 
WA_P01C_GUMWA_STR-PROE1 sy-vline 
WA_P01C_GUMWA_STR-METH2 sy-vline 
WA_P01C_GUMWA_STR-LGAG2 sy-vline 
WA_P01C_GUMWA_STR-VBEL2 sy-vline 
WA_P01C_GUMWA_STR-VBEE2 sy-vline 
WA_P01C_GUMWA_STR-SBEL2 sy-vline 
WA_P01C_GUMWA_STR-SBEE2 sy-vline 
WA_P01C_GUMWA_STR-PROL2 sy-vline 
WA_P01C_GUMWA_STR-PROE2 sy-vline 
WA_P01C_GUMWA_STR-METH3 sy-vline 
WA_P01C_GUMWA_STR-LGAG3 sy-vline 
WA_P01C_GUMWA_STR-VBEL3 sy-vline 
WA_P01C_GUMWA_STR-VBEE3 sy-vline 
WA_P01C_GUMWA_STR-SBEL3 sy-vline 
WA_P01C_GUMWA_STR-SBEE3 sy-vline 
WA_P01C_GUMWA_STR-PROL3 sy-vline 
WA_P01C_GUMWA_STR-PROE3 sy-vline 
WA_P01C_GUMWA_STR-METH4 sy-vline 
WA_P01C_GUMWA_STR-LGAG4 sy-vline 
WA_P01C_GUMWA_STR-VBEL4 sy-vline 
WA_P01C_GUMWA_STR-VBEE4 sy-vline 
WA_P01C_GUMWA_STR-SBEL4 sy-vline 
WA_P01C_GUMWA_STR-SBEE4 sy-vline 
WA_P01C_GUMWA_STR-PROL4 sy-vline 
WA_P01C_GUMWA_STR-PROE4 sy-vline 
WA_P01C_GUMWA_STR-METH5 sy-vline 
WA_P01C_GUMWA_STR-LGAG5 sy-vline 
WA_P01C_GUMWA_STR-VBEL5 sy-vline 
WA_P01C_GUMWA_STR-VBEE5 sy-vline 
WA_P01C_GUMWA_STR-SBEL5 sy-vline 
WA_P01C_GUMWA_STR-SBEE5 sy-vline 
WA_P01C_GUMWA_STR-PROL5 sy-vline 
WA_P01C_GUMWA_STR-PROE5 sy-vline 
WA_P01C_GUMWA_STR-METH6 sy-vline 
WA_P01C_GUMWA_STR-LGAG6 sy-vline 
WA_P01C_GUMWA_STR-VBEL6 sy-vline 
WA_P01C_GUMWA_STR-VBEE6 sy-vline 
WA_P01C_GUMWA_STR-SBEL6 sy-vline 
WA_P01C_GUMWA_STR-SBEE6 sy-vline 
WA_P01C_GUMWA_STR-PROL6 sy-vline 
WA_P01C_GUMWA_STR-PROE6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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