ABAP Select data from SAP table RLACLS_HEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLACLS_HEAD
*  INTO TABLE @DATA(IT_RLACLS_HEAD2).
*--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_RLACLS_HEAD INDEX 1 INTO DATA(WA_RLACLS_HEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLACLS_HEAD>-GROUP_ID = 1.
<RLACLS_HEAD>-ORDER_NO = 1.
<RLACLS_HEAD>-MANDT = 1.
<RLACLS_HEAD>-ACCTNO = 1.
<RLACLS_HEAD>-RET_MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLACLS_HEAD-BUKRS, sy-vline,
  WA_RLACLS_HEAD-PRPSHPA, sy-vline,
  WA_RLACLS_HEAD-PP_VALFROM, sy-vline,
  WA_RLACLS_HEAD-PP_VALTO, sy-vline,
  WA_RLACLS_HEAD-MEINS, sy-vline,
  WA_RLACLS_HEAD-ACCTME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLACLS_HEAD 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_RLACLS_HEAD 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_RLACLS_HEAD INTO WA_RLACLS_HEAD.


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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLACLS_HEAD-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACLS_HEAD-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ACCTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLACLS_HEAD-ACCTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACLS_HEAD-ACCTME.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field REF_PURCH_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLACLS_HEAD-REF_PURCH_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACLS_HEAD-REF_PURCH_DOC.
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_RLACLS_HEAD_STR, 
GROUP_ID TYPE STRING,
ORDER_NO TYPE STRING,
MANDT TYPE STRING,
ACCTNO TYPE STRING,
RET_MATNR TYPE STRING,
BUKRS TYPE STRING,
PRPSHPA TYPE STRING,
PP_VALFROM TYPE STRING,
PP_VALTO TYPE STRING,
MEINS TYPE STRING,
ACCTME TYPE STRING,
ROLEACM TYPE STRING,
ACCTBAL TYPE STRING,
SEQNO TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ACCTSTATE TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
NRART TYPE STRING,
PARNR TYPE STRING,
ACST_CTRL TYPE STRING,
CPCTRL TYPE STRING,
ACST_CREATE_CTRL TYPE STRING,
KONNR TYPE STRING,
KTPNR TYPE STRING,
PLANING TYPE STRING,
PLANING_CTRL TYPE STRING,
REORDBAL TYPE STRING,
ORDQUAN TYPE STRING,
REF_PURCH_DOC TYPE STRING,
ACCDELDATE TYPE STRING,
ACCTBAL_ACCTME TYPE STRING,
MAKTX TYPE STRING,
BUTXT TYPE STRING,
ICON_ACCTSTATE TYPE STRING,
STEXT TYPE STRING,
ROLEACM_TEXT TYPE STRING,
PSHPSTATE TYPE STRING,
ACMAN TYPE STRING,
ACMANTY TYPE STRING,
ACHOL TYPE STRING,
ACHOLTY TYPE STRING,
ACMAN_PR TYPE STRING,
ACMANTY_PR TYPE STRING,
ACHOL_PR TYPE STRING,
ACHOLTY_PR TYPE STRING,
ACMAN_NAME1_PR TYPE STRING,
ACMAN_ORT01_PR TYPE STRING,
ACHOL_NAME1_PR TYPE STRING,
ACHOL_ORT01_PR TYPE STRING,
ACMAN_PR_EXT TYPE STRING,
ACHOL_PR_EXT TYPE STRING,
RET_MATNR_EXT TYPE STRING,
ACCTNO_EXT TYPE STRING,
ICON_PLANING TYPE STRING,
OPEN_ORDQUAN TYPE STRING,
OPEN_DELIVQUAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLACLS_HEAD_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_RLACLS_HEAD_STR-GROUP_ID sy-vline 
WA_RLACLS_HEAD_STR-ORDER_NO sy-vline 
WA_RLACLS_HEAD_STR-MANDT sy-vline 
WA_RLACLS_HEAD_STR-ACCTNO sy-vline 
WA_RLACLS_HEAD_STR-RET_MATNR sy-vline 
WA_RLACLS_HEAD_STR-BUKRS sy-vline 
WA_RLACLS_HEAD_STR-PRPSHPA sy-vline 
WA_RLACLS_HEAD_STR-PP_VALFROM sy-vline 
WA_RLACLS_HEAD_STR-PP_VALTO sy-vline 
WA_RLACLS_HEAD_STR-MEINS sy-vline 
WA_RLACLS_HEAD_STR-ACCTME sy-vline 
WA_RLACLS_HEAD_STR-ROLEACM sy-vline 
WA_RLACLS_HEAD_STR-ACCTBAL sy-vline 
WA_RLACLS_HEAD_STR-SEQNO sy-vline 
WA_RLACLS_HEAD_STR-OTYPE sy-vline 
WA_RLACLS_HEAD_STR-OBJID sy-vline 
WA_RLACLS_HEAD_STR-ACCTSTATE sy-vline 
WA_RLACLS_HEAD_STR-VKORG sy-vline 
WA_RLACLS_HEAD_STR-VTWEG sy-vline 
WA_RLACLS_HEAD_STR-NRART sy-vline 
WA_RLACLS_HEAD_STR-PARNR sy-vline 
WA_RLACLS_HEAD_STR-ACST_CTRL sy-vline 
WA_RLACLS_HEAD_STR-CPCTRL sy-vline 
WA_RLACLS_HEAD_STR-ACST_CREATE_CTRL sy-vline 
WA_RLACLS_HEAD_STR-KONNR sy-vline 
WA_RLACLS_HEAD_STR-KTPNR sy-vline 
WA_RLACLS_HEAD_STR-PLANING sy-vline 
WA_RLACLS_HEAD_STR-PLANING_CTRL sy-vline 
WA_RLACLS_HEAD_STR-REORDBAL sy-vline 
WA_RLACLS_HEAD_STR-ORDQUAN sy-vline 
WA_RLACLS_HEAD_STR-REF_PURCH_DOC sy-vline 
WA_RLACLS_HEAD_STR-ACCDELDATE sy-vline 
WA_RLACLS_HEAD_STR-ACCTBAL_ACCTME sy-vline 
WA_RLACLS_HEAD_STR-MAKTX sy-vline 
WA_RLACLS_HEAD_STR-BUTXT sy-vline 
WA_RLACLS_HEAD_STR-ICON_ACCTSTATE sy-vline 
WA_RLACLS_HEAD_STR-STEXT sy-vline 
WA_RLACLS_HEAD_STR-ROLEACM_TEXT sy-vline 
WA_RLACLS_HEAD_STR-PSHPSTATE sy-vline 
WA_RLACLS_HEAD_STR-ACMAN sy-vline 
WA_RLACLS_HEAD_STR-ACMANTY sy-vline 
WA_RLACLS_HEAD_STR-ACHOL sy-vline 
WA_RLACLS_HEAD_STR-ACHOLTY sy-vline 
WA_RLACLS_HEAD_STR-ACMAN_PR sy-vline 
WA_RLACLS_HEAD_STR-ACMANTY_PR sy-vline 
WA_RLACLS_HEAD_STR-ACHOL_PR sy-vline 
WA_RLACLS_HEAD_STR-ACHOLTY_PR sy-vline 
WA_RLACLS_HEAD_STR-ACMAN_NAME1_PR sy-vline 
WA_RLACLS_HEAD_STR-ACMAN_ORT01_PR sy-vline 
WA_RLACLS_HEAD_STR-ACHOL_NAME1_PR sy-vline 
WA_RLACLS_HEAD_STR-ACHOL_ORT01_PR sy-vline 
WA_RLACLS_HEAD_STR-ACMAN_PR_EXT sy-vline 
WA_RLACLS_HEAD_STR-ACHOL_PR_EXT sy-vline 
WA_RLACLS_HEAD_STR-RET_MATNR_EXT sy-vline 
WA_RLACLS_HEAD_STR-ACCTNO_EXT sy-vline 
WA_RLACLS_HEAD_STR-ICON_PLANING sy-vline 
WA_RLACLS_HEAD_STR-OPEN_ORDQUAN sy-vline 
WA_RLACLS_HEAD_STR-OPEN_DELIVQUAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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