ABAP Select data from SAP table RLACPOITDIA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLACPOITDIA
*  INTO TABLE @DATA(IT_RLACPOITDIA2).
*--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_RLACPOITDIA INDEX 1 INTO DATA(WA_RLACPOITDIA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLACPOITDIA>-MANDT = 1.
<RLACPOITDIA>-POSTNO = 1.
<RLACPOITDIA>-BJAHR = 1.
<RLACPOITDIA>-POSTIT = 1.
<RLACPOITDIA>-ACCTNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLACPOITDIA-POSTQUAN_ABS, sy-vline,
  WA_RLACPOITDIA-POSTME, sy-vline,
  WA_RLACPOITDIA-SIGN, sy-vline,
  WA_RLACPOITDIA-ACCTPTY, sy-vline,
  WA_RLACPOITDIA-POTYPE_TXT, sy-vline,
  WA_RLACPOITDIA-BALBPOST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLACPOITDIA 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_RLACPOITDIA 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_RLACPOITDIA INTO WA_RLACPOITDIA.


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field ACCTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RLACPOITDIA-ACCTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLACPOITDIA-ACCTME.
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_RLACPOITDIA_STR, 
MANDT TYPE STRING,
POSTNO TYPE STRING,
BJAHR TYPE STRING,
POSTIT TYPE STRING,
ACCTNO TYPE STRING,
POSTQUAN_ABS TYPE STRING,
POSTME TYPE STRING,
SIGN TYPE STRING,
ACCTPTY TYPE STRING,
POTYPE_TXT TYPE STRING,
BALBPOST TYPE STRING,
SEQNO TYPE STRING,
PSHPNO TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
MBLIT TYPE STRING,
BWART TYPE STRING,
LSMNG TYPE STRING,
LSMEH TYPE STRING,
REFPOSTNO TYPE STRING,
REFPOSTYEAR TYPE STRING,
REFPOSTIT TYPE STRING,
REFLFSNR TYPE STRING,
DOCNO TYPE STRING,
DOCIT TYPE STRING,
REFDOCDATE TYPE STRING,
REFFRBNR TYPE STRING,
MEINS TYPE STRING,
ACMAN TYPE STRING,
ACMANTY TYPE STRING,
ACHOL TYPE STRING,
ACHOLTY TYPE STRING,
ACMAN_NAME1 TYPE STRING,
ACMAN_ORT01 TYPE STRING,
ACHOL_NAME1 TYPE STRING,
ACHOL_ORT01 TYPE STRING,
BUKRS TYPE STRING,
RET_MATNR TYPE STRING,
MAKTX TYPE STRING,
ACCTME TYPE STRING,
ACCTBAL TYPE STRING,
ACCTPTY_COUNTER TYPE STRING,
POTYPE_TXT_COUNTER TYPE STRING,
SIGN_COUNTER TYPE STRING,
ICON_DETAIL TYPE STRING,
SELKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLACPOITDIA_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_RLACPOITDIA_STR-MANDT sy-vline 
WA_RLACPOITDIA_STR-POSTNO sy-vline 
WA_RLACPOITDIA_STR-BJAHR sy-vline 
WA_RLACPOITDIA_STR-POSTIT sy-vline 
WA_RLACPOITDIA_STR-ACCTNO sy-vline 
WA_RLACPOITDIA_STR-POSTQUAN_ABS sy-vline 
WA_RLACPOITDIA_STR-POSTME sy-vline 
WA_RLACPOITDIA_STR-SIGN sy-vline 
WA_RLACPOITDIA_STR-ACCTPTY sy-vline 
WA_RLACPOITDIA_STR-POTYPE_TXT sy-vline 
WA_RLACPOITDIA_STR-BALBPOST sy-vline 
WA_RLACPOITDIA_STR-SEQNO sy-vline 
WA_RLACPOITDIA_STR-PSHPNO sy-vline 
WA_RLACPOITDIA_STR-MBLNR sy-vline 
WA_RLACPOITDIA_STR-MJAHR sy-vline 
WA_RLACPOITDIA_STR-MBLIT sy-vline 
WA_RLACPOITDIA_STR-BWART sy-vline 
WA_RLACPOITDIA_STR-LSMNG sy-vline 
WA_RLACPOITDIA_STR-LSMEH sy-vline 
WA_RLACPOITDIA_STR-REFPOSTNO sy-vline 
WA_RLACPOITDIA_STR-REFPOSTYEAR sy-vline 
WA_RLACPOITDIA_STR-REFPOSTIT sy-vline 
WA_RLACPOITDIA_STR-REFLFSNR sy-vline 
WA_RLACPOITDIA_STR-DOCNO sy-vline 
WA_RLACPOITDIA_STR-DOCIT sy-vline 
WA_RLACPOITDIA_STR-REFDOCDATE sy-vline 
WA_RLACPOITDIA_STR-REFFRBNR sy-vline 
WA_RLACPOITDIA_STR-MEINS sy-vline 
WA_RLACPOITDIA_STR-ACMAN sy-vline 
WA_RLACPOITDIA_STR-ACMANTY sy-vline 
WA_RLACPOITDIA_STR-ACHOL sy-vline 
WA_RLACPOITDIA_STR-ACHOLTY sy-vline 
WA_RLACPOITDIA_STR-ACMAN_NAME1 sy-vline 
WA_RLACPOITDIA_STR-ACMAN_ORT01 sy-vline 
WA_RLACPOITDIA_STR-ACHOL_NAME1 sy-vline 
WA_RLACPOITDIA_STR-ACHOL_ORT01 sy-vline 
WA_RLACPOITDIA_STR-BUKRS sy-vline 
WA_RLACPOITDIA_STR-RET_MATNR sy-vline 
WA_RLACPOITDIA_STR-MAKTX sy-vline 
WA_RLACPOITDIA_STR-ACCTME sy-vline 
WA_RLACPOITDIA_STR-ACCTBAL sy-vline 
WA_RLACPOITDIA_STR-ACCTPTY_COUNTER sy-vline 
WA_RLACPOITDIA_STR-POTYPE_TXT_COUNTER sy-vline 
WA_RLACPOITDIA_STR-SIGN_COUNTER sy-vline 
WA_RLACPOITDIA_STR-ICON_DETAIL sy-vline 
WA_RLACPOITDIA_STR-SELKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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