ABAP Select data from SAP table /SCWM/T337A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/T337A 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 /SCWM/T337A. 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 /SCWM/T337A 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_/SCWM/T337A TYPE STANDARD TABLE OF /SCWM/T337A,
      WA_/SCWM/T337A TYPE /SCWM/T337A,
      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: </SCWM/T337A> TYPE /SCWM/T337A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SCWM/T337A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/T337A
  INTO TABLE IT_/SCWM/T337A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/T337A
*  INTO TABLE @DATA(IT_/SCWM/T337A2).
*--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_/SCWM/T337A INDEX 1 INTO DATA(WA_/SCWM/T337A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/T337A ASSIGNING </SCWM/T337A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/T337A>-MANDT = 1.
</SCWM/T337A>-LGNUM = 1.
</SCWM/T337A>-LGTYP = 1.
</SCWM/T337A>-PLAUF = 1.
</SCWM/T337A>-MAXQU = 1.

ENDLOOP.

LOOP AT IT_/SCWM/T337A INTO WA_/SCWM/T337A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/T337A-LPTYP, sy-vline,
  WA_/SCWM/T337A-POS01, sy-vline,
  WA_/SCWM/T337A-POS02, sy-vline,
  WA_/SCWM/T337A-POS03, sy-vline,
  WA_/SCWM/T337A-POS04, sy-vline,
  WA_/SCWM/T337A-POS05, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/T337A 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_/SCWM/T337A 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_/SCWM/T337A INTO WA_/SCWM/T337A.


*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_/SCWM/T337A_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
PLAUF TYPE STRING,
MAXQU TYPE STRING,
LPTYP TYPE STRING,
POS01 TYPE STRING,
POS02 TYPE STRING,
POS03 TYPE STRING,
POS04 TYPE STRING,
POS05 TYPE STRING,
POS06 TYPE STRING,
POS07 TYPE STRING,
POS08 TYPE STRING,
POS09 TYPE STRING,
POS10 TYPE STRING,
POS11 TYPE STRING,
POS12 TYPE STRING,
POS13 TYPE STRING,
POS14 TYPE STRING,
POS15 TYPE STRING,
POS16 TYPE STRING,
POS17 TYPE STRING,
POS18 TYPE STRING,
POS19 TYPE STRING,
POS20 TYPE STRING,
POS21 TYPE STRING,
POS22 TYPE STRING,
POS23 TYPE STRING,
POS24 TYPE STRING,
POS25 TYPE STRING,
POS26 TYPE STRING,
POS27 TYPE STRING,
POS28 TYPE STRING,
POS29 TYPE STRING,
POS30 TYPE STRING,
POS31 TYPE STRING,
POS32 TYPE STRING,
POS33 TYPE STRING,
POS34 TYPE STRING,
POS35 TYPE STRING,
POS36 TYPE STRING,
POS37 TYPE STRING,
POS38 TYPE STRING,
POS39 TYPE STRING,
POS40 TYPE STRING,
POS41 TYPE STRING,
POS42 TYPE STRING,
POS43 TYPE STRING,
POS44 TYPE STRING,
POS45 TYPE STRING,
POS46 TYPE STRING,
POS47 TYPE STRING,
POS48 TYPE STRING,
POS49 TYPE STRING,
POS50 TYPE STRING,
POS51 TYPE STRING,
POS52 TYPE STRING,
POS53 TYPE STRING,
POS54 TYPE STRING,
POS55 TYPE STRING,
POS56 TYPE STRING,
POS57 TYPE STRING,
POS58 TYPE STRING,
POS59 TYPE STRING,
POS60 TYPE STRING,
POS61 TYPE STRING,
POS62 TYPE STRING,
POS63 TYPE STRING,
POS64 TYPE STRING,
POS65 TYPE STRING,
POS66 TYPE STRING,
POS67 TYPE STRING,
POS68 TYPE STRING,
POS69 TYPE STRING,
POS70 TYPE STRING,
POS71 TYPE STRING,
POS72 TYPE STRING,
POS73 TYPE STRING,
POS74 TYPE STRING,
POS75 TYPE STRING,
POS76 TYPE STRING,
POS77 TYPE STRING,
POS78 TYPE STRING,
POS79 TYPE STRING,
POS80 TYPE STRING,
POS81 TYPE STRING,
POS82 TYPE STRING,
POS83 TYPE STRING,
POS84 TYPE STRING,
POS85 TYPE STRING,
POS86 TYPE STRING,
POS87 TYPE STRING,
POS88 TYPE STRING,
POS89 TYPE STRING,
POS90 TYPE STRING,
POS91 TYPE STRING,
POS92 TYPE STRING,
POS93 TYPE STRING,
POS94 TYPE STRING,
POS95 TYPE STRING,
POS96 TYPE STRING,
POS97 TYPE STRING,
POS98 TYPE STRING,
POS99 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/T337A_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_/SCWM/T337A_STR-MANDT sy-vline 
WA_/SCWM/T337A_STR-LGNUM sy-vline 
WA_/SCWM/T337A_STR-LGTYP sy-vline 
WA_/SCWM/T337A_STR-PLAUF sy-vline 
WA_/SCWM/T337A_STR-MAXQU sy-vline 
WA_/SCWM/T337A_STR-LPTYP sy-vline 
WA_/SCWM/T337A_STR-POS01 sy-vline 
WA_/SCWM/T337A_STR-POS02 sy-vline 
WA_/SCWM/T337A_STR-POS03 sy-vline 
WA_/SCWM/T337A_STR-POS04 sy-vline 
WA_/SCWM/T337A_STR-POS05 sy-vline 
WA_/SCWM/T337A_STR-POS06 sy-vline 
WA_/SCWM/T337A_STR-POS07 sy-vline 
WA_/SCWM/T337A_STR-POS08 sy-vline 
WA_/SCWM/T337A_STR-POS09 sy-vline 
WA_/SCWM/T337A_STR-POS10 sy-vline 
WA_/SCWM/T337A_STR-POS11 sy-vline 
WA_/SCWM/T337A_STR-POS12 sy-vline 
WA_/SCWM/T337A_STR-POS13 sy-vline 
WA_/SCWM/T337A_STR-POS14 sy-vline 
WA_/SCWM/T337A_STR-POS15 sy-vline 
WA_/SCWM/T337A_STR-POS16 sy-vline 
WA_/SCWM/T337A_STR-POS17 sy-vline 
WA_/SCWM/T337A_STR-POS18 sy-vline 
WA_/SCWM/T337A_STR-POS19 sy-vline 
WA_/SCWM/T337A_STR-POS20 sy-vline 
WA_/SCWM/T337A_STR-POS21 sy-vline 
WA_/SCWM/T337A_STR-POS22 sy-vline 
WA_/SCWM/T337A_STR-POS23 sy-vline 
WA_/SCWM/T337A_STR-POS24 sy-vline 
WA_/SCWM/T337A_STR-POS25 sy-vline 
WA_/SCWM/T337A_STR-POS26 sy-vline 
WA_/SCWM/T337A_STR-POS27 sy-vline 
WA_/SCWM/T337A_STR-POS28 sy-vline 
WA_/SCWM/T337A_STR-POS29 sy-vline 
WA_/SCWM/T337A_STR-POS30 sy-vline 
WA_/SCWM/T337A_STR-POS31 sy-vline 
WA_/SCWM/T337A_STR-POS32 sy-vline 
WA_/SCWM/T337A_STR-POS33 sy-vline 
WA_/SCWM/T337A_STR-POS34 sy-vline 
WA_/SCWM/T337A_STR-POS35 sy-vline 
WA_/SCWM/T337A_STR-POS36 sy-vline 
WA_/SCWM/T337A_STR-POS37 sy-vline 
WA_/SCWM/T337A_STR-POS38 sy-vline 
WA_/SCWM/T337A_STR-POS39 sy-vline 
WA_/SCWM/T337A_STR-POS40 sy-vline 
WA_/SCWM/T337A_STR-POS41 sy-vline 
WA_/SCWM/T337A_STR-POS42 sy-vline 
WA_/SCWM/T337A_STR-POS43 sy-vline 
WA_/SCWM/T337A_STR-POS44 sy-vline 
WA_/SCWM/T337A_STR-POS45 sy-vline 
WA_/SCWM/T337A_STR-POS46 sy-vline 
WA_/SCWM/T337A_STR-POS47 sy-vline 
WA_/SCWM/T337A_STR-POS48 sy-vline 
WA_/SCWM/T337A_STR-POS49 sy-vline 
WA_/SCWM/T337A_STR-POS50 sy-vline 
WA_/SCWM/T337A_STR-POS51 sy-vline 
WA_/SCWM/T337A_STR-POS52 sy-vline 
WA_/SCWM/T337A_STR-POS53 sy-vline 
WA_/SCWM/T337A_STR-POS54 sy-vline 
WA_/SCWM/T337A_STR-POS55 sy-vline 
WA_/SCWM/T337A_STR-POS56 sy-vline 
WA_/SCWM/T337A_STR-POS57 sy-vline 
WA_/SCWM/T337A_STR-POS58 sy-vline 
WA_/SCWM/T337A_STR-POS59 sy-vline 
WA_/SCWM/T337A_STR-POS60 sy-vline 
WA_/SCWM/T337A_STR-POS61 sy-vline 
WA_/SCWM/T337A_STR-POS62 sy-vline 
WA_/SCWM/T337A_STR-POS63 sy-vline 
WA_/SCWM/T337A_STR-POS64 sy-vline 
WA_/SCWM/T337A_STR-POS65 sy-vline 
WA_/SCWM/T337A_STR-POS66 sy-vline 
WA_/SCWM/T337A_STR-POS67 sy-vline 
WA_/SCWM/T337A_STR-POS68 sy-vline 
WA_/SCWM/T337A_STR-POS69 sy-vline 
WA_/SCWM/T337A_STR-POS70 sy-vline 
WA_/SCWM/T337A_STR-POS71 sy-vline 
WA_/SCWM/T337A_STR-POS72 sy-vline 
WA_/SCWM/T337A_STR-POS73 sy-vline 
WA_/SCWM/T337A_STR-POS74 sy-vline 
WA_/SCWM/T337A_STR-POS75 sy-vline 
WA_/SCWM/T337A_STR-POS76 sy-vline 
WA_/SCWM/T337A_STR-POS77 sy-vline 
WA_/SCWM/T337A_STR-POS78 sy-vline 
WA_/SCWM/T337A_STR-POS79 sy-vline 
WA_/SCWM/T337A_STR-POS80 sy-vline 
WA_/SCWM/T337A_STR-POS81 sy-vline 
WA_/SCWM/T337A_STR-POS82 sy-vline 
WA_/SCWM/T337A_STR-POS83 sy-vline 
WA_/SCWM/T337A_STR-POS84 sy-vline 
WA_/SCWM/T337A_STR-POS85 sy-vline 
WA_/SCWM/T337A_STR-POS86 sy-vline 
WA_/SCWM/T337A_STR-POS87 sy-vline 
WA_/SCWM/T337A_STR-POS88 sy-vline 
WA_/SCWM/T337A_STR-POS89 sy-vline 
WA_/SCWM/T337A_STR-POS90 sy-vline 
WA_/SCWM/T337A_STR-POS91 sy-vline 
WA_/SCWM/T337A_STR-POS92 sy-vline 
WA_/SCWM/T337A_STR-POS93 sy-vline 
WA_/SCWM/T337A_STR-POS94 sy-vline 
WA_/SCWM/T337A_STR-POS95 sy-vline 
WA_/SCWM/T337A_STR-POS96 sy-vline 
WA_/SCWM/T337A_STR-POS97 sy-vline 
WA_/SCWM/T337A_STR-POS98 sy-vline 
WA_/SCWM/T337A_STR-POS99 sy-vline      INTO ld_text SEPARATED BY SPACE.

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