ABAP Select data from SAP table ML4H_MLDOCHD 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 ML4H_MLDOCHD 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 ML4H_MLDOCHD. 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 ML4H_MLDOCHD 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_ML4H_MLDOCHD TYPE STANDARD TABLE OF ML4H_MLDOCHD,
      WA_ML4H_MLDOCHD TYPE ML4H_MLDOCHD,
      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: <ML4H_MLDOCHD> TYPE ML4H_MLDOCHD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ML4H_MLDOCHD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ML4H_MLDOCHD
  INTO TABLE IT_ML4H_MLDOCHD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ML4H_MLDOCHD
*  INTO TABLE @DATA(IT_ML4H_MLDOCHD2).
*--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_ML4H_MLDOCHD INDEX 1 INTO DATA(WA_ML4H_MLDOCHD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ML4H_MLDOCHD ASSIGNING <ML4H_MLDOCHD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ML4H_MLDOCHD>-MANDT = 1.
<ML4H_MLDOCHD>-MATNR = 1.
<ML4H_MLDOCHD>-BWKEY = 1.
<ML4H_MLDOCHD>-BWTAR = 1.
<ML4H_MLDOCHD>-SOBKZ = 1.

ENDLOOP.

LOOP AT IT_ML4H_MLDOCHD INTO WA_ML4H_MLDOCHD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ML4H_MLDOCHD-KZBWS, sy-vline,
  WA_ML4H_MLDOCHD-XOBEW, sy-vline,
  WA_ML4H_MLDOCHD-VBELN, sy-vline,
  WA_ML4H_MLDOCHD-POSNR, sy-vline,
  WA_ML4H_MLDOCHD-PSPNR, sy-vline,
  WA_ML4H_MLDOCHD-LIFNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ML4H_MLDOCHD 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_ML4H_MLDOCHD 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_ML4H_MLDOCHD INTO WA_ML4H_MLDOCHD.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field JAHRPER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-JAHRPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-JAHRPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field JAHRPER_WIP
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-JAHRPER_WIP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-JAHRPER_WIP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PERI7, internal->external for field CURRENT_PER
CALL FUNCTION 'CONVERSION_EXIT_PERI7_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-CURRENT_PER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-CURRENT_PER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field KJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-KJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-KJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WASYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-WASYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-WASYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ML4H_MLDOCHD-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ML4H_MLDOCHD-AWREF.
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_ML4H_MLDOCHD_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
SOBKZ TYPE STRING,
KZBWS TYPE STRING,
XOBEW TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PSPNR TYPE STRING,
LIFNR TYPE STRING,
MLAST TYPE STRING,
KALNR TYPE STRING,
DOCREF TYPE STRING,
CURTP TYPE STRING,
RLDNR TYPE STRING,
RUNREF TYPE STRING,
ACC_PRINCIPLE TYPE STRING,
JAHRPER TYPE STRING,
JAHRPER_WIP TYPE STRING,
CURRENT_PER TYPE STRING,
XABR TYPE STRING,
GLVOR TYPE STRING,
VGART TYPE STRING,
POSART TYPE STRING,
CATEG TYPE STRING,
PTYP TYPE STRING,
BEWARTGRP TYPE STRING,
BVALT TYPE STRING,
PROCESS TYPE STRING,
PKALNR TYPE STRING,
QUANT TYPE STRING,
MEINS TYPE STRING,
STVAL TYPE STRING,
PRD TYPE STRING,
KDM TYPE STRING,
TPPRD TYPE STRING,
ALTVAL TYPE STRING,
WAERS TYPE STRING,
LBKUM TYPE STRING,
SALK3 TYPE STRING,
SALKV TYPE STRING,
STPRS TYPE STRING,
PVPRS TYPE STRING,
PEINH TYPE STRING,
XEKREL TYPE STRING,
PLQTY TYPE STRING,
MARKUP TYPE STRING,
VKWRT TYPE STRING,
VKSAL TYPE STRING,
EQNUM TYPE STRING,
TIMESTAMP TYPE STRING,
BUDAT TYPE STRING,
CYCLENR TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
BELNR TYPE STRING,
KJAHR TYPE STRING,
POSNR_DOC TYPE STRING,
AWTYP TYPE STRING,
WASYS TYPE STRING,
AWORG TYPE STRING,
AWREF TYPE STRING,
AWITEM TYPE STRING,
AWITGRP TYPE STRING,
USNAM TYPE STRING,
TCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ML4H_MLDOCHD_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_ML4H_MLDOCHD_STR-MANDT sy-vline 
WA_ML4H_MLDOCHD_STR-MATNR sy-vline 
WA_ML4H_MLDOCHD_STR-BWKEY sy-vline 
WA_ML4H_MLDOCHD_STR-BWTAR sy-vline 
WA_ML4H_MLDOCHD_STR-SOBKZ sy-vline 
WA_ML4H_MLDOCHD_STR-KZBWS sy-vline 
WA_ML4H_MLDOCHD_STR-XOBEW sy-vline 
WA_ML4H_MLDOCHD_STR-VBELN sy-vline 
WA_ML4H_MLDOCHD_STR-POSNR sy-vline 
WA_ML4H_MLDOCHD_STR-PSPNR sy-vline 
WA_ML4H_MLDOCHD_STR-LIFNR sy-vline 
WA_ML4H_MLDOCHD_STR-MLAST sy-vline 
WA_ML4H_MLDOCHD_STR-KALNR sy-vline 
WA_ML4H_MLDOCHD_STR-DOCREF sy-vline 
WA_ML4H_MLDOCHD_STR-CURTP sy-vline 
WA_ML4H_MLDOCHD_STR-RLDNR sy-vline 
WA_ML4H_MLDOCHD_STR-RUNREF sy-vline 
WA_ML4H_MLDOCHD_STR-ACC_PRINCIPLE sy-vline 
WA_ML4H_MLDOCHD_STR-JAHRPER sy-vline 
WA_ML4H_MLDOCHD_STR-JAHRPER_WIP sy-vline 
WA_ML4H_MLDOCHD_STR-CURRENT_PER sy-vline 
WA_ML4H_MLDOCHD_STR-XABR sy-vline 
WA_ML4H_MLDOCHD_STR-GLVOR sy-vline 
WA_ML4H_MLDOCHD_STR-VGART sy-vline 
WA_ML4H_MLDOCHD_STR-POSART sy-vline 
WA_ML4H_MLDOCHD_STR-CATEG sy-vline 
WA_ML4H_MLDOCHD_STR-PTYP sy-vline 
WA_ML4H_MLDOCHD_STR-BEWARTGRP sy-vline 
WA_ML4H_MLDOCHD_STR-BVALT sy-vline 
WA_ML4H_MLDOCHD_STR-PROCESS sy-vline 
WA_ML4H_MLDOCHD_STR-PKALNR sy-vline 
WA_ML4H_MLDOCHD_STR-QUANT sy-vline 
WA_ML4H_MLDOCHD_STR-MEINS sy-vline 
WA_ML4H_MLDOCHD_STR-STVAL sy-vline 
WA_ML4H_MLDOCHD_STR-PRD sy-vline 
WA_ML4H_MLDOCHD_STR-KDM sy-vline 
WA_ML4H_MLDOCHD_STR-TPPRD sy-vline 
WA_ML4H_MLDOCHD_STR-ALTVAL sy-vline 
WA_ML4H_MLDOCHD_STR-WAERS sy-vline 
WA_ML4H_MLDOCHD_STR-LBKUM sy-vline 
WA_ML4H_MLDOCHD_STR-SALK3 sy-vline 
WA_ML4H_MLDOCHD_STR-SALKV sy-vline 
WA_ML4H_MLDOCHD_STR-STPRS sy-vline 
WA_ML4H_MLDOCHD_STR-PVPRS sy-vline 
WA_ML4H_MLDOCHD_STR-PEINH sy-vline 
WA_ML4H_MLDOCHD_STR-XEKREL sy-vline 
WA_ML4H_MLDOCHD_STR-PLQTY sy-vline 
WA_ML4H_MLDOCHD_STR-MARKUP sy-vline 
WA_ML4H_MLDOCHD_STR-VKWRT sy-vline 
WA_ML4H_MLDOCHD_STR-VKSAL sy-vline 
WA_ML4H_MLDOCHD_STR-EQNUM sy-vline 
WA_ML4H_MLDOCHD_STR-TIMESTAMP sy-vline 
WA_ML4H_MLDOCHD_STR-BUDAT sy-vline 
WA_ML4H_MLDOCHD_STR-CYCLENR sy-vline 
WA_ML4H_MLDOCHD_STR-AUFNR sy-vline 
WA_ML4H_MLDOCHD_STR-AUFPS sy-vline 
WA_ML4H_MLDOCHD_STR-BELNR sy-vline 
WA_ML4H_MLDOCHD_STR-KJAHR sy-vline 
WA_ML4H_MLDOCHD_STR-POSNR_DOC sy-vline 
WA_ML4H_MLDOCHD_STR-AWTYP sy-vline 
WA_ML4H_MLDOCHD_STR-WASYS sy-vline 
WA_ML4H_MLDOCHD_STR-AWORG sy-vline 
WA_ML4H_MLDOCHD_STR-AWREF sy-vline 
WA_ML4H_MLDOCHD_STR-AWITEM sy-vline 
WA_ML4H_MLDOCHD_STR-AWITGRP sy-vline 
WA_ML4H_MLDOCHD_STR-USNAM sy-vline 
WA_ML4H_MLDOCHD_STR-TCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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