ABAP Select data from SAP table LTAP_CR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LTAP_CR 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_CR. 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_CR 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_CR TYPE STANDARD TABLE OF LTAP_CR,
      WA_LTAP_CR TYPE LTAP_CR,
      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_CR> TYPE LTAP_CR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTAP_CR
*  INTO TABLE @DATA(IT_LTAP_CR2).
*--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_CR INDEX 1 INTO DATA(WA_LTAP_CR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTAP_CR>-MATNR = 1.
<LTAP_CR>-WERKS = 1.
<LTAP_CR>-CHARG = 1.
<LTAP_CR>-BESTQ = 1.
<LTAP_CR>-SOBKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTAP_CR-SONUM, sy-vline,
  WA_LTAP_CR-LETYP, sy-vline,
  WA_LTAP_CR-ANFME, sy-vline,
  WA_LTAP_CR-ALTME, sy-vline,
  WA_LTAP_CR-WDATU, sy-vline,
  WA_LTAP_CR-VFDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTAP_CR 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_CR 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_CR INTO WA_LTAP_CR.


*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_LTAP_CR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTAP_CR-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit SPDEV, internal->external for field LDEST
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_LTAP_CR-LDEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTAP_CR-LDEST.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit LENUM, internal->external for field NLENR
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_LTAP_CR-NLENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTAP_CR-NLENR.
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_CR_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
LETYP TYPE STRING,
ANFME TYPE STRING,
ALTME TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
ZEUGN TYPE STRING,
SQUIT TYPE STRING,
LDEST TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
VLTYP TYPE STRING,
VLBER TYPE STRING,
VLPLA TYPE STRING,
VPPOS TYPE STRING,
VLENR TYPE STRING,
VLQNR TYPE STRING,
NLTYP TYPE STRING,
NLBER TYPE STRING,
NLPLA TYPE STRING,
NPPOS TYPE STRING,
NLENR TYPE STRING,
NLQNR TYPE STRING,
RLTYP TYPE STRING,
RLBER TYPE STRING,
RLPLA TYPE STRING,
RPPOS TYPE STRING,
RLQNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTAP_CR_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_CR_STR-MATNR sy-vline 
WA_LTAP_CR_STR-WERKS sy-vline 
WA_LTAP_CR_STR-CHARG sy-vline 
WA_LTAP_CR_STR-BESTQ sy-vline 
WA_LTAP_CR_STR-SOBKZ sy-vline 
WA_LTAP_CR_STR-SONUM sy-vline 
WA_LTAP_CR_STR-LETYP sy-vline 
WA_LTAP_CR_STR-ANFME sy-vline 
WA_LTAP_CR_STR-ALTME sy-vline 
WA_LTAP_CR_STR-WDATU sy-vline 
WA_LTAP_CR_STR-VFDAT sy-vline 
WA_LTAP_CR_STR-ZEUGN sy-vline 
WA_LTAP_CR_STR-SQUIT sy-vline 
WA_LTAP_CR_STR-LDEST sy-vline 
WA_LTAP_CR_STR-WEMPF sy-vline 
WA_LTAP_CR_STR-ABLAD sy-vline 
WA_LTAP_CR_STR-VLTYP sy-vline 
WA_LTAP_CR_STR-VLBER sy-vline 
WA_LTAP_CR_STR-VLPLA sy-vline 
WA_LTAP_CR_STR-VPPOS sy-vline 
WA_LTAP_CR_STR-VLENR sy-vline 
WA_LTAP_CR_STR-VLQNR sy-vline 
WA_LTAP_CR_STR-NLTYP sy-vline 
WA_LTAP_CR_STR-NLBER sy-vline 
WA_LTAP_CR_STR-NLPLA sy-vline 
WA_LTAP_CR_STR-NPPOS sy-vline 
WA_LTAP_CR_STR-NLENR sy-vline 
WA_LTAP_CR_STR-NLQNR sy-vline 
WA_LTAP_CR_STR-RLTYP sy-vline 
WA_LTAP_CR_STR-RLBER sy-vline 
WA_LTAP_CR_STR-RLPLA sy-vline 
WA_LTAP_CR_STR-RPPOS sy-vline 
WA_LTAP_CR_STR-RLQNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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