ABAP Select data from SAP table T437S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T437S 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 T437S. 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 T437S 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_T437S TYPE STANDARD TABLE OF T437S,
      WA_T437S TYPE T437S,
      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: <T437S> TYPE T437S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T437S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T437S
  INTO TABLE IT_T437S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T437S
*  INTO TABLE @DATA(IT_T437S2).
*--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_T437S INDEX 1 INTO DATA(WA_T437S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T437S ASSIGNING <T437S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T437S>-MANDT = 1.
<T437S>-SFPRO = 1.
<T437S>-AUART = 1.
<T437S>-BACKF = 1.
<T437S>-KSART = 1.

ENDLOOP.

LOOP AT IT_T437S INTO WA_T437S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T437S-LABOR, sy-vline,
  WA_T437S-BWAWA, sy-vline,
  WA_T437S-BWAWE, sy-vline,
  WA_T437S-REDST, sy-vline,
  WA_T437S-REDHZ, sy-vline,
  WA_T437S-BAKOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T437S 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_T437S 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_T437S INTO WA_T437S.


*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_T437S_STR, 
MANDT TYPE STRING,
SFPRO TYPE STRING,
AUART TYPE STRING,
BACKF TYPE STRING,
KSART TYPE STRING,
LABOR TYPE STRING,
BWAWA TYPE STRING,
BWAWE TYPE STRING,
REDST TYPE STRING,
REDHZ TYPE STRING,
BAKOR TYPE STRING,
RRETR TYPE STRING,
REPPT TYPE STRING,
AUTOWE TYPE STRING,
BWASC TYPE STRING,
BWACO TYPE STRING,
BWAWEM TYPE STRING,
XFAN1 TYPE STRING,
BWAWAM TYPE STRING,
BWACR TYPE STRING,
PLGEN TYPE STRING,
BWAWES TYPE STRING,
BWAWAS TYPE STRING,
BWASCS TYPE STRING,
BWACOS TYPE STRING,
BWAWEMS TYPE STRING,
BWAWAMS TYPE STRING,
BWACRS TYPE STRING,
BCKFL TYPE STRING,
AGREQ TYPE STRING,
NODUM TYPE STRING,
PRZST TYPE STRING,
CHSMM TYPE STRING,
RULES TYPE STRING,
BWULACT TYPE STRING,
KZTTZ TYPE STRING,
RP_KANBAN TYPE STRING,
POST_SYNC_EWM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T437S_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_T437S_STR-MANDT sy-vline 
WA_T437S_STR-SFPRO sy-vline 
WA_T437S_STR-AUART sy-vline 
WA_T437S_STR-BACKF sy-vline 
WA_T437S_STR-KSART sy-vline 
WA_T437S_STR-LABOR sy-vline 
WA_T437S_STR-BWAWA sy-vline 
WA_T437S_STR-BWAWE sy-vline 
WA_T437S_STR-REDST sy-vline 
WA_T437S_STR-REDHZ sy-vline 
WA_T437S_STR-BAKOR sy-vline 
WA_T437S_STR-RRETR sy-vline 
WA_T437S_STR-REPPT sy-vline 
WA_T437S_STR-AUTOWE sy-vline 
WA_T437S_STR-BWASC sy-vline 
WA_T437S_STR-BWACO sy-vline 
WA_T437S_STR-BWAWEM sy-vline 
WA_T437S_STR-XFAN1 sy-vline 
WA_T437S_STR-BWAWAM sy-vline 
WA_T437S_STR-BWACR sy-vline 
WA_T437S_STR-PLGEN sy-vline 
WA_T437S_STR-BWAWES sy-vline 
WA_T437S_STR-BWAWAS sy-vline 
WA_T437S_STR-BWASCS sy-vline 
WA_T437S_STR-BWACOS sy-vline 
WA_T437S_STR-BWAWEMS sy-vline 
WA_T437S_STR-BWAWAMS sy-vline 
WA_T437S_STR-BWACRS sy-vline 
WA_T437S_STR-BCKFL sy-vline 
WA_T437S_STR-AGREQ sy-vline 
WA_T437S_STR-NODUM sy-vline 
WA_T437S_STR-PRZST sy-vline 
WA_T437S_STR-CHSMM sy-vline 
WA_T437S_STR-RULES sy-vline 
WA_T437S_STR-BWULACT sy-vline 
WA_T437S_STR-KZTTZ sy-vline 
WA_T437S_STR-RP_KANBAN sy-vline 
WA_T437S_STR-POST_SYNC_EWM sy-vline      INTO ld_text SEPARATED BY SPACE.

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