ABAP Select data from SAP table U_16818 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_16818 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 U_16818. 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 U_16818 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_U_16818 TYPE STANDARD TABLE OF U_16818,
      WA_U_16818 TYPE U_16818,
      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: <U_16818> TYPE U_16818.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_16818.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_16818
  INTO TABLE IT_U_16818.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_16818
*  INTO TABLE @DATA(IT_U_168182).
*--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_U_16818 INDEX 1 INTO DATA(WA_U_168182).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_16818 ASSIGNING <U_16818>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_16818>-MANDT = 1.
<U_16818>-ABELN = 1.
<U_16818>-ABELP = 1.
<U_16818>-VZWRK = 1.
<U_16818>-VZENT = 1.

ENDLOOP.

LOOP AT IT_U_16818 INTO WA_U_16818.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_16818-VZLFR, sy-vline,
  WA_U_16818-PMNGV, sy-vline,
  WA_U_16818-IMNGV, sy-vline,
  WA_U_16818-AUFME, sy-vline,
  WA_U_16818-LIFNR, sy-vline,
  WA_U_16818-VKORG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_16818 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_U_16818 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_U_16818 INTO WA_U_16818.


*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 ABELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-ABELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-ABELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VZENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-VZENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-VZENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VZLFR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-VZLFR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-VZLFR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-AUFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-AUFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BSTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-BSTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-BSTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UMLME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-UMLME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-UMLME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBLNU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16818-EBLNU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16818-EBLNU.
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_U_16818_STR, 
MANDT TYPE STRING,
ABELN TYPE STRING,
ABELP TYPE STRING,
VZWRK TYPE STRING,
VZENT TYPE STRING,
VZLFR TYPE STRING,
PMNGV TYPE STRING,
IMNGV TYPE STRING,
AUFME TYPE STRING,
LIFNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
PLIFZ TYPE STRING,
WEBAZ TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
BSTMG TYPE STRING,
BSTME TYPE STRING,
UMLMG TYPE STRING,
UMLME TYPE STRING,
LFMNG TYPE STRING,
VRKME TYPE STRING,
EBLNU TYPE STRING,
EBLPU TYPE STRING,
ABFST TYPE STRING,
ABAST TYPE STRING,
BSTST TYPE STRING,
UMLST TYPE STRING,
LIEST TYPE STRING,
ABVST TYPE STRING,
SPERR TYPE STRING,
BMERF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_16818_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_U_16818_STR-MANDT sy-vline 
WA_U_16818_STR-ABELN sy-vline 
WA_U_16818_STR-ABELP sy-vline 
WA_U_16818_STR-VZWRK sy-vline 
WA_U_16818_STR-VZENT sy-vline 
WA_U_16818_STR-VZLFR sy-vline 
WA_U_16818_STR-PMNGV sy-vline 
WA_U_16818_STR-IMNGV sy-vline 
WA_U_16818_STR-AUFME sy-vline 
WA_U_16818_STR-LIFNR sy-vline 
WA_U_16818_STR-VKORG sy-vline 
WA_U_16818_STR-VTWEG sy-vline 
WA_U_16818_STR-SPART sy-vline 
WA_U_16818_STR-PLIFZ sy-vline 
WA_U_16818_STR-WEBAZ sy-vline 
WA_U_16818_STR-EKORG sy-vline 
WA_U_16818_STR-EKGRP sy-vline 
WA_U_16818_STR-BSTMG sy-vline 
WA_U_16818_STR-BSTME sy-vline 
WA_U_16818_STR-UMLMG sy-vline 
WA_U_16818_STR-UMLME sy-vline 
WA_U_16818_STR-LFMNG sy-vline 
WA_U_16818_STR-VRKME sy-vline 
WA_U_16818_STR-EBLNU sy-vline 
WA_U_16818_STR-EBLPU sy-vline 
WA_U_16818_STR-ABFST sy-vline 
WA_U_16818_STR-ABAST sy-vline 
WA_U_16818_STR-BSTST sy-vline 
WA_U_16818_STR-UMLST sy-vline 
WA_U_16818_STR-LIEST sy-vline 
WA_U_16818_STR-ABVST sy-vline 
WA_U_16818_STR-SPERR sy-vline 
WA_U_16818_STR-BMERF sy-vline      INTO ld_text SEPARATED BY SPACE.

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