ABAP Select data from SAP table LTAP_CONF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTAP_CONF
*  INTO TABLE @DATA(IT_LTAP_CONF2).
*--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_LTAP_CONF INDEX 1 INTO DATA(WA_LTAP_CONF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTAP_CONF>-TANUM = 1.
<LTAP_CONF>-TAPOS = 1.
<LTAP_CONF>-SQUIT = 1.
<LTAP_CONF>-NISTA = 1.
<LTAP_CONF>-NDIFA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTAP_CONF-RISTA, sy-vline,
  WA_LTAP_CONF-RDIFA, sy-vline,
  WA_LTAP_CONF-KZNUL, sy-vline,
  WA_LTAP_CONF-PISTA, sy-vline,
  WA_LTAP_CONF-ALTME, sy-vline,
  WA_LTAP_CONF-KZDIF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTAP_CONF 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_LTAP_CONF 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_LTAP_CONF INTO WA_LTAP_CONF.


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

*Conversion exit LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_LTAP_CONF-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTAP_CONF-LENUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field /CWM/ACT_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LTAP_CONF-/CWM/ACT_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTAP_CONF-/CWM/ACT_UOM.
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_LTAP_CONF_STR, 
TANUM TYPE STRING,
TAPOS TYPE STRING,
SQUIT TYPE STRING,
NISTA TYPE STRING,
NDIFA TYPE STRING,
RISTA TYPE STRING,
RDIFA TYPE STRING,
KZNUL TYPE STRING,
PISTA TYPE STRING,
ALTME TYPE STRING,
KZDIF TYPE STRING,
LENUM TYPE STRING,
VQUIT TYPE STRING,
PICKM TYPE STRING,
DIFFM TYPE STRING,
RESTM TYPE STRING,
BQUIT TYPE STRING,
LQNUM TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
NLPLA TYPE STRING,
NPPOS TYPE STRING,
PAPOS TYPE STRING,
NQUIT TYPE STRING,
RQUIT TYPE STRING,
PARTI TYPE STRING,
/CWM/ACT_QTY TYPE STRING,
/CWM/ACT_UOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTAP_CONF_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_LTAP_CONF_STR-TANUM sy-vline 
WA_LTAP_CONF_STR-TAPOS sy-vline 
WA_LTAP_CONF_STR-SQUIT sy-vline 
WA_LTAP_CONF_STR-NISTA sy-vline 
WA_LTAP_CONF_STR-NDIFA sy-vline 
WA_LTAP_CONF_STR-RISTA sy-vline 
WA_LTAP_CONF_STR-RDIFA sy-vline 
WA_LTAP_CONF_STR-KZNUL sy-vline 
WA_LTAP_CONF_STR-PISTA sy-vline 
WA_LTAP_CONF_STR-ALTME sy-vline 
WA_LTAP_CONF_STR-KZDIF sy-vline 
WA_LTAP_CONF_STR-LENUM sy-vline 
WA_LTAP_CONF_STR-VQUIT sy-vline 
WA_LTAP_CONF_STR-PICKM sy-vline 
WA_LTAP_CONF_STR-DIFFM sy-vline 
WA_LTAP_CONF_STR-RESTM sy-vline 
WA_LTAP_CONF_STR-BQUIT sy-vline 
WA_LTAP_CONF_STR-LQNUM sy-vline 
WA_LTAP_CONF_STR-CHARG sy-vline 
WA_LTAP_CONF_STR-SOBKZ sy-vline 
WA_LTAP_CONF_STR-SONUM sy-vline 
WA_LTAP_CONF_STR-NLPLA sy-vline 
WA_LTAP_CONF_STR-NPPOS sy-vline 
WA_LTAP_CONF_STR-PAPOS sy-vline 
WA_LTAP_CONF_STR-NQUIT sy-vline 
WA_LTAP_CONF_STR-RQUIT sy-vline 
WA_LTAP_CONF_STR-PARTI sy-vline 
WA_LTAP_CONF_STR-/CWM/ACT_QTY sy-vline 
WA_LTAP_CONF_STR-/CWM/ACT_UOM sy-vline      INTO ld_text SEPARATED BY SPACE.

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