ABAP Select data from SAP table POMLQ 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 POMLQ 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 POMLQ. 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 POMLQ 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_POMLQ TYPE STANDARD TABLE OF POMLQ,
      WA_POMLQ TYPE POMLQ,
      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: <POMLQ> TYPE POMLQ.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM POMLQ
*  INTO TABLE @DATA(IT_POMLQ2).
*--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_POMLQ INDEX 1 INTO DATA(WA_POMLQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<POMLQ>-BUKRS = 1.
<POMLQ>-WERKS = 1.
<POMLQ>-BTRTL = 1.
<POMLQ>-PERSG = 1.
<POMLQ>-PERSK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_POMLQ-ABKRS, sy-vline,
  WA_POMLQ-KOSTL, sy-vline,
  WA_POMLQ-ORGEH, sy-vline,
  WA_POMLQ-ANSVH, sy-vline,
  WA_POMLQ-PERNR, sy-vline,
  WA_POMLQ-LQGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_POMLQ 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_POMLQ 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_POMLQ INTO WA_POMLQ.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_POMLQ-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_POMLQ-KOSTL.
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_POMLQ_STR, 
BUKRS TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
ABKRS TYPE STRING,
KOSTL TYPE STRING,
ORGEH TYPE STRING,
ANSVH TYPE STRING,
PERNR TYPE STRING,
LQGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_POMLQ_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_POMLQ_STR-BUKRS sy-vline 
WA_POMLQ_STR-WERKS sy-vline 
WA_POMLQ_STR-BTRTL sy-vline 
WA_POMLQ_STR-PERSG sy-vline 
WA_POMLQ_STR-PERSK sy-vline 
WA_POMLQ_STR-ABKRS sy-vline 
WA_POMLQ_STR-KOSTL sy-vline 
WA_POMLQ_STR-ORGEH sy-vline 
WA_POMLQ_STR-ANSVH sy-vline 
WA_POMLQ_STR-PERNR sy-vline 
WA_POMLQ_STR-LQGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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