ABAP Select data from SAP table SLGH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLGH
*  INTO TABLE @DATA(IT_SLGH2).
*--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_SLGH INDEX 1 INTO DATA(WA_SLGH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLGH>-MANDT = 1.
<SLGH>-SINUM = 1.
<SLGH>-SJAHR = 1.
<SLGH>-NRBSE = 1.
<SLGH>-POSLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLGH-MATNR, sy-vline,
  WA_SLGH-CHARG, sy-vline,
  WA_SLGH-BWTAR, sy-vline,
  WA_SLGH-LGPLA, sy-vline,
  WA_SLGH-BSTAR, sy-vline,
  WA_SLGH-LVORM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLGH 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_SLGH 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_SLGH INTO WA_SLGH.


*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 SINUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_SLGH-SINUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLGH-SINUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field SJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SLGH-SJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLGH-SJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_SLGH-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLGH-MATNR.
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_SLGH_STR, 
MANDT TYPE STRING,
SINUM TYPE STRING,
SJAHR TYPE STRING,
NRBSE TYPE STRING,
POSLG TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
BWTAR TYPE STRING,
LGPLA TYPE STRING,
BSTAR TYPE STRING,
LVORM TYPE STRING,
MAABC TYPE STRING,
KZKRI TYPE STRING,
PREIS TYPE STRING,
PEINH TYPE STRING,
XVERR TYPE STRING,
XSPEL TYPE STRING,
XZAEL TYPE STRING,
XDIFF TYPE STRING,
KLANF TYPE STRING,
SNANF TYPE STRING,
BUANF TYPE STRING,
SNAKT TYPE STRING,
BUAKT TYPE STRING,
SNZZP TYPE STRING,
BUZZP TYPE STRING,
ISZZP TYPE STRING,
LMENG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLGH_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_SLGH_STR-MANDT sy-vline 
WA_SLGH_STR-SINUM sy-vline 
WA_SLGH_STR-SJAHR sy-vline 
WA_SLGH_STR-NRBSE sy-vline 
WA_SLGH_STR-POSLG sy-vline 
WA_SLGH_STR-MATNR sy-vline 
WA_SLGH_STR-CHARG sy-vline 
WA_SLGH_STR-BWTAR sy-vline 
WA_SLGH_STR-LGPLA sy-vline 
WA_SLGH_STR-BSTAR sy-vline 
WA_SLGH_STR-LVORM sy-vline 
WA_SLGH_STR-MAABC sy-vline 
WA_SLGH_STR-KZKRI sy-vline 
WA_SLGH_STR-PREIS sy-vline 
WA_SLGH_STR-PEINH sy-vline 
WA_SLGH_STR-XVERR sy-vline 
WA_SLGH_STR-XSPEL sy-vline 
WA_SLGH_STR-XZAEL sy-vline 
WA_SLGH_STR-XDIFF sy-vline 
WA_SLGH_STR-KLANF sy-vline 
WA_SLGH_STR-SNANF sy-vline 
WA_SLGH_STR-BUANF sy-vline 
WA_SLGH_STR-SNAKT sy-vline 
WA_SLGH_STR-BUAKT sy-vline 
WA_SLGH_STR-SNZZP sy-vline 
WA_SLGH_STR-BUZZP sy-vline 
WA_SLGH_STR-ISZZP sy-vline 
WA_SLGH_STR-LMENG sy-vline      INTO ld_text SEPARATED BY SPACE.

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