ABAP Select data from SAP table E3MLANM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3MLANM 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 E3MLANM. 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 E3MLANM 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_E3MLANM TYPE STANDARD TABLE OF E3MLANM,
      WA_E3MLANM TYPE E3MLANM,
      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: <E3MLANM> TYPE E3MLANM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3MLANM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3MLANM
  INTO TABLE IT_E3MLANM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3MLANM
*  INTO TABLE @DATA(IT_E3MLANM2).
*--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_E3MLANM INDEX 1 INTO DATA(WA_E3MLANM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3MLANM ASSIGNING <E3MLANM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3MLANM>-MSGFN = 1.
<E3MLANM>-ALAND = 1.
<E3MLANM>-TATY1 = 1.
<E3MLANM>-TAXM1 = 1.
<E3MLANM>-TATY2 = 1.

ENDLOOP.

LOOP AT IT_E3MLANM INTO WA_E3MLANM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3MLANM-TAXM2, sy-vline,
  WA_E3MLANM-TATY3, sy-vline,
  WA_E3MLANM-TAXM3, sy-vline,
  WA_E3MLANM-TATY4, sy-vline,
  WA_E3MLANM-TAXM4, sy-vline,
  WA_E3MLANM-TATY5, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3MLANM 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_E3MLANM 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_E3MLANM INTO WA_E3MLANM.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_E3MLANM_STR, 
MSGFN TYPE STRING,
ALAND TYPE STRING,
TATY1 TYPE STRING,
TAXM1 TYPE STRING,
TATY2 TYPE STRING,
TAXM2 TYPE STRING,
TATY3 TYPE STRING,
TAXM3 TYPE STRING,
TATY4 TYPE STRING,
TAXM4 TYPE STRING,
TATY5 TYPE STRING,
TAXM5 TYPE STRING,
TATY6 TYPE STRING,
TAXM6 TYPE STRING,
TATY7 TYPE STRING,
TAXM7 TYPE STRING,
TATY8 TYPE STRING,
TAXM8 TYPE STRING,
TATY9 TYPE STRING,
TAXM9 TYPE STRING,
TAXIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3MLANM_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_E3MLANM_STR-MSGFN sy-vline 
WA_E3MLANM_STR-ALAND sy-vline 
WA_E3MLANM_STR-TATY1 sy-vline 
WA_E3MLANM_STR-TAXM1 sy-vline 
WA_E3MLANM_STR-TATY2 sy-vline 
WA_E3MLANM_STR-TAXM2 sy-vline 
WA_E3MLANM_STR-TATY3 sy-vline 
WA_E3MLANM_STR-TAXM3 sy-vline 
WA_E3MLANM_STR-TATY4 sy-vline 
WA_E3MLANM_STR-TAXM4 sy-vline 
WA_E3MLANM_STR-TATY5 sy-vline 
WA_E3MLANM_STR-TAXM5 sy-vline 
WA_E3MLANM_STR-TATY6 sy-vline 
WA_E3MLANM_STR-TAXM6 sy-vline 
WA_E3MLANM_STR-TATY7 sy-vline 
WA_E3MLANM_STR-TAXM7 sy-vline 
WA_E3MLANM_STR-TATY8 sy-vline 
WA_E3MLANM_STR-TAXM8 sy-vline 
WA_E3MLANM_STR-TATY9 sy-vline 
WA_E3MLANM_STR-TAXM9 sy-vline 
WA_E3MLANM_STR-TAXIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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