ABAP Select data from SAP table RLACSTSEL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RLACSTSEL 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 RLACSTSEL. 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 RLACSTSEL 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_RLACSTSEL TYPE STANDARD TABLE OF RLACSTSEL,
      WA_RLACSTSEL TYPE RLACSTSEL,
      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: <RLACSTSEL> TYPE RLACSTSEL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLACSTSEL
*  INTO TABLE @DATA(IT_RLACSTSEL2).
*--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_RLACSTSEL INDEX 1 INTO DATA(WA_RLACSTSEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLACSTSEL>-ACSTNO = 1.
<RLACSTSEL>-BALDATE = 1.
<RLACSTSEL>-CUSTNO_PR = 1.
<RLACSTSEL>-SUPPNO_PR = 1.
<RLACSTSEL>-MATCUSTNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLACSTSEL-MATSUPPNO, sy-vline,
  WA_RLACSTSEL-ACCTNO_S, sy-vline,
  WA_RLACSTSEL-CHNGTYPE, sy-vline,
  WA_RLACSTSEL-CPSTATEHD, sy-vline,
  WA_RLACSTSEL-INBOUND, sy-vline,
  WA_RLACSTSEL-OUTBOUND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLACSTSEL 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_RLACSTSEL 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_RLACSTSEL INTO WA_RLACSTSEL.


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

*Conversion exit MATN1, internal->external for field RET_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RLACSTSEL-RET_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACSTSEL-RET_MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ACCTNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLACSTSEL-ACCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACSTSEL-ACCTNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PSHPNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLACSTSEL-PSHPNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACSTSEL-PSHPNO.
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_RLACSTSEL_STR, 
ACSTNO TYPE STRING,
BALDATE TYPE STRING,
CUSTNO_PR TYPE STRING,
SUPPNO_PR TYPE STRING,
MATCUSTNO TYPE STRING,
MATSUPPNO TYPE STRING,
ACCTNO_S TYPE STRING,
CHNGTYPE TYPE STRING,
CPSTATEHD TYPE STRING,
INBOUND TYPE STRING,
OUTBOUND TYPE STRING,
BUKRS TYPE STRING,
RET_MATNR TYPE STRING,
ACCTNO TYPE STRING,
ROLEACM TYPE STRING,
OBJID TYPE STRING,
ACCTSTATE TYPE STRING,
NRART TYPE STRING,
PARNR TYPE STRING,
ACST_CTRL TYPE STRING,
CPCTRL TYPE STRING,
PSHPNO TYPE STRING,
ACMAN TYPE STRING,
ACMANTY TYPE STRING,
ACHOL TYPE STRING,
ACHOLTY TYPE STRING,
PPSEL TYPE STRING,
VALFROM TYPE STRING,
VALDAT TYPE STRING,
OPEN_QUAN_SEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLACSTSEL_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_RLACSTSEL_STR-ACSTNO sy-vline 
WA_RLACSTSEL_STR-BALDATE sy-vline 
WA_RLACSTSEL_STR-CUSTNO_PR sy-vline 
WA_RLACSTSEL_STR-SUPPNO_PR sy-vline 
WA_RLACSTSEL_STR-MATCUSTNO sy-vline 
WA_RLACSTSEL_STR-MATSUPPNO sy-vline 
WA_RLACSTSEL_STR-ACCTNO_S sy-vline 
WA_RLACSTSEL_STR-CHNGTYPE sy-vline 
WA_RLACSTSEL_STR-CPSTATEHD sy-vline 
WA_RLACSTSEL_STR-INBOUND sy-vline 
WA_RLACSTSEL_STR-OUTBOUND sy-vline 
WA_RLACSTSEL_STR-BUKRS sy-vline 
WA_RLACSTSEL_STR-RET_MATNR sy-vline 
WA_RLACSTSEL_STR-ACCTNO sy-vline 
WA_RLACSTSEL_STR-ROLEACM sy-vline 
WA_RLACSTSEL_STR-OBJID sy-vline 
WA_RLACSTSEL_STR-ACCTSTATE sy-vline 
WA_RLACSTSEL_STR-NRART sy-vline 
WA_RLACSTSEL_STR-PARNR sy-vline 
WA_RLACSTSEL_STR-ACST_CTRL sy-vline 
WA_RLACSTSEL_STR-CPCTRL sy-vline 
WA_RLACSTSEL_STR-PSHPNO sy-vline 
WA_RLACSTSEL_STR-ACMAN sy-vline 
WA_RLACSTSEL_STR-ACMANTY sy-vline 
WA_RLACSTSEL_STR-ACHOL sy-vline 
WA_RLACSTSEL_STR-ACHOLTY sy-vline 
WA_RLACSTSEL_STR-PPSEL sy-vline 
WA_RLACSTSEL_STR-VALFROM sy-vline 
WA_RLACSTSEL_STR-VALDAT sy-vline 
WA_RLACSTSEL_STR-OPEN_QUAN_SEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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