ABAP Select data from SAP table EHSWAS_LVSEA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHSWAS_LVSEA
*  INTO TABLE @DATA(IT_EHSWAS_LVSEA2).
*--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_EHSWAS_LVSEA INDEX 1 INTO DATA(WA_EHSWAS_LVSEA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHSWAS_LVSEA>-LGNUM = 1.
<EHSWAS_LVSEA>-WERKS = 1.
<EHSWAS_LVSEA>-BWLVS = 1.
<EHSWAS_LVSEA>-VLTYP = 1.
<EHSWAS_LVSEA>-VLBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHSWAS_LVSEA-VLPLA, sy-vline,
  WA_EHSWAS_LVSEA-NLTYP, sy-vline,
  WA_EHSWAS_LVSEA-NLBER, sy-vline,
  WA_EHSWAS_LVSEA-NLPLA, sy-vline,
  WA_EHSWAS_LVSEA-BLDAT, sy-vline,
  WA_EHSWAS_LVSEA-BTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHSWAS_LVSEA 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_EHSWAS_LVSEA 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_EHSWAS_LVSEA INTO WA_EHSWAS_LVSEA.


*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 EAINTAMU
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_EHSWAS_LVSEA-EAINTAMU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHSWAS_LVSEA-EAINTAMU.
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_EHSWAS_LVSEA_STR, 
LGNUM TYPE STRING,
WERKS TYPE STRING,
BWLVS TYPE STRING,
VLTYP TYPE STRING,
VLBER TYPE STRING,
VLPLA TYPE STRING,
NLTYP TYPE STRING,
NLBER TYPE STRING,
NLPLA TYPE STRING,
BLDAT TYPE STRING,
BTEXT TYPE STRING,
BKTXT TYPE STRING,
UMWRK TYPE STRING,
UMLGO TYPE STRING,
BWART TYPE STRING,
INSMK TYPE STRING,
UMCHA TYPE STRING,
HSDAT TYPE STRING,
GRUND TYPE STRING,
SPLGM TYPE STRING,
SPLAM TYPE STRING,
EAINTAMU TYPE STRING,
CHGDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHSWAS_LVSEA_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_EHSWAS_LVSEA_STR-LGNUM sy-vline 
WA_EHSWAS_LVSEA_STR-WERKS sy-vline 
WA_EHSWAS_LVSEA_STR-BWLVS sy-vline 
WA_EHSWAS_LVSEA_STR-VLTYP sy-vline 
WA_EHSWAS_LVSEA_STR-VLBER sy-vline 
WA_EHSWAS_LVSEA_STR-VLPLA sy-vline 
WA_EHSWAS_LVSEA_STR-NLTYP sy-vline 
WA_EHSWAS_LVSEA_STR-NLBER sy-vline 
WA_EHSWAS_LVSEA_STR-NLPLA sy-vline 
WA_EHSWAS_LVSEA_STR-BLDAT sy-vline 
WA_EHSWAS_LVSEA_STR-BTEXT sy-vline 
WA_EHSWAS_LVSEA_STR-BKTXT sy-vline 
WA_EHSWAS_LVSEA_STR-UMWRK sy-vline 
WA_EHSWAS_LVSEA_STR-UMLGO sy-vline 
WA_EHSWAS_LVSEA_STR-BWART sy-vline 
WA_EHSWAS_LVSEA_STR-INSMK sy-vline 
WA_EHSWAS_LVSEA_STR-UMCHA sy-vline 
WA_EHSWAS_LVSEA_STR-HSDAT sy-vline 
WA_EHSWAS_LVSEA_STR-GRUND sy-vline 
WA_EHSWAS_LVSEA_STR-SPLGM sy-vline 
WA_EHSWAS_LVSEA_STR-SPLAM sy-vline 
WA_EHSWAS_LVSEA_STR-EAINTAMU sy-vline 
WA_EHSWAS_LVSEA_STR-CHGDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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