ABAP Select data from SAP table NALIWRE 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 NALIWRE 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 NALIWRE. 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 NALIWRE 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_NALIWRE TYPE STANDARD TABLE OF NALIWRE,
      WA_NALIWRE TYPE NALIWRE,
      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: <NALIWRE> TYPE NALIWRE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NALIWRE
*  INTO TABLE @DATA(IT_NALIWRE2).
*--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_NALIWRE INDEX 1 INTO DATA(WA_NALIWRE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NALIWRE>-TABIX = 1.
<NALIWRE>-COLOR = 1.
<NALIWRE>-SELFL = 1.
<NALIWRE>-WBELN_RL = 1.
<NALIWRE>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NALIWRE-WBELN, sy-vline,
  WA_NALIWRE-LFART, sy-vline,
  WA_NALIWRE-LFART_TXT, sy-vline,
  WA_NALIWRE-LFTYP, sy-vline,
  WA_NALIWRE-VTEXT, sy-vline,
  WA_NALIWRE-WFDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NALIWRE 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_NALIWRE 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_NALIWRE INTO WA_NALIWRE.


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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field LIFNR_FI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NALIWRE-LIFNR_FI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NALIWRE-LIFNR_FI.
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_NALIWRE_STR, 
TABIX TYPE STRING,
COLOR TYPE STRING,
SELFL TYPE STRING,
WBELN_RL TYPE STRING,
POSNR TYPE STRING,
WBELN TYPE STRING,
LFART TYPE STRING,
LFART_TXT TYPE STRING,
LFTYP TYPE STRING,
VTEXT TYPE STRING,
WFDAT TYPE STRING,
WFDAT_RL TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
BUKRS TYPE STRING,
LIFRE TYPE STRING,
LIF_NAME1 TYPE STRING,
LNRZB TYPE STRING,
LZB_NAME1 TYPE STRING,
WAERL TYPE STRING,
NETWR TYPE STRING,
MWSBK TYPE STRING,
BRTWR TYPE STRING,
RFBSK TYPE STRING,
RFBSK_TXT TYPE STRING,
ZTERM TYPE STRING,
ZLSCH TYPE STRING,
BLDAT TYPE STRING,
ZUONR TYPE STRING,
XBLNR TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
ARCHIV TYPE STRING,
SELKZ TYPE STRING,
ADRNR_RE TYPE STRING,
ADDR_TYPE_RE TYPE STRING,
ADRNP_RE TYPE STRING,
ADRNR_RS TYPE STRING,
ADRNR_RG TYPE STRING,
ADRNR_AZ TYPE STRING,
LIFNR_FI TYPE STRING,
LIFNR_FI_NAME1 TYPE STRING,
PARVW TYPE STRING,
PNAME TYPE STRING,
KSCHL TYPE STRING,
NACHA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NALIWRE_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_NALIWRE_STR-TABIX sy-vline 
WA_NALIWRE_STR-COLOR sy-vline 
WA_NALIWRE_STR-SELFL sy-vline 
WA_NALIWRE_STR-WBELN_RL sy-vline 
WA_NALIWRE_STR-POSNR sy-vline 
WA_NALIWRE_STR-WBELN sy-vline 
WA_NALIWRE_STR-LFART sy-vline 
WA_NALIWRE_STR-LFART_TXT sy-vline 
WA_NALIWRE_STR-LFTYP sy-vline 
WA_NALIWRE_STR-VTEXT sy-vline 
WA_NALIWRE_STR-WFDAT sy-vline 
WA_NALIWRE_STR-WFDAT_RL sy-vline 
WA_NALIWRE_STR-EKORG sy-vline 
WA_NALIWRE_STR-EKGRP sy-vline 
WA_NALIWRE_STR-BUKRS sy-vline 
WA_NALIWRE_STR-LIFRE sy-vline 
WA_NALIWRE_STR-LIF_NAME1 sy-vline 
WA_NALIWRE_STR-LNRZB sy-vline 
WA_NALIWRE_STR-LZB_NAME1 sy-vline 
WA_NALIWRE_STR-WAERL sy-vline 
WA_NALIWRE_STR-NETWR sy-vline 
WA_NALIWRE_STR-MWSBK sy-vline 
WA_NALIWRE_STR-BRTWR sy-vline 
WA_NALIWRE_STR-RFBSK sy-vline 
WA_NALIWRE_STR-RFBSK_TXT sy-vline 
WA_NALIWRE_STR-ZTERM sy-vline 
WA_NALIWRE_STR-ZLSCH sy-vline 
WA_NALIWRE_STR-BLDAT sy-vline 
WA_NALIWRE_STR-ZUONR sy-vline 
WA_NALIWRE_STR-XBLNR sy-vline 
WA_NALIWRE_STR-ERDAT sy-vline 
WA_NALIWRE_STR-ERNAM sy-vline 
WA_NALIWRE_STR-ARCHIV sy-vline 
WA_NALIWRE_STR-SELKZ sy-vline 
WA_NALIWRE_STR-ADRNR_RE sy-vline 
WA_NALIWRE_STR-ADDR_TYPE_RE sy-vline 
WA_NALIWRE_STR-ADRNP_RE sy-vline 
WA_NALIWRE_STR-ADRNR_RS sy-vline 
WA_NALIWRE_STR-ADRNR_RG sy-vline 
WA_NALIWRE_STR-ADRNR_AZ sy-vline 
WA_NALIWRE_STR-LIFNR_FI sy-vline 
WA_NALIWRE_STR-LIFNR_FI_NAME1 sy-vline 
WA_NALIWRE_STR-PARVW sy-vline 
WA_NALIWRE_STR-PNAME sy-vline 
WA_NALIWRE_STR-KSCHL sy-vline 
WA_NALIWRE_STR-NACHA sy-vline      INTO ld_text SEPARATED BY SPACE.

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