ABAP Select data from SAP table /PRA/VL_DA_LOGFR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /PRA/VL_DA_LOGFR 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 /PRA/VL_DA_LOGFR. 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 /PRA/VL_DA_LOGFR 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_/PRA/VL_DA_LOGFR TYPE STANDARD TABLE OF /PRA/VL_DA_LOGFR,
      WA_/PRA/VL_DA_LOGFR TYPE /PRA/VL_DA_LOGFR,
      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: </PRA/VL_DA_LOGFR> TYPE /PRA/VL_DA_LOGFR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /PRA/VL_DA_LOGFR
  INTO TABLE IT_/PRA/VL_DA_LOGFR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /PRA/VL_DA_LOGFR
*  INTO TABLE @DATA(IT_/PRA/VL_DA_LOGFR2).
*--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_/PRA/VL_DA_LOGFR INDEX 1 INTO DATA(WA_/PRA/VL_DA_LOGFR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/PRA/VL_DA_LOGFR ASSIGNING </PRA/VL_DA_LOGFR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</PRA/VL_DA_LOGFR>-MANDT = 1.
</PRA/VL_DA_LOGFR>-DOC_NO = 1.
</PRA/VL_DA_LOGFR>-DOC_YEAR = 1.
</PRA/VL_DA_LOGFR>-LINE_NO = 1.
</PRA/VL_DA_LOGFR>-POS_NO = 1.

ENDLOOP.

LOOP AT IT_/PRA/VL_DA_LOGFR INTO WA_/PRA/VL_DA_LOGFR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/PRA/VL_DA_LOGFR-GUID, sy-vline,
  WA_/PRA/VL_DA_LOGFR-PRICE_CHG_LVL, sy-vline,
  WA_/PRA/VL_DA_LOGFR-SD_FRML, sy-vline,
  WA_/PRA/VL_DA_LOGFR-GR_VAL_CURR, sy-vline,
  WA_/PRA/VL_DA_LOGFR-ACTL_GR_VAL_AM, sy-vline,
  WA_/PRA/VL_DA_LOGFR-ENTL_GR_VAL_AM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/PRA/VL_DA_LOGFR 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_/PRA/VL_DA_LOGFR 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_/PRA/VL_DA_LOGFR INTO WA_/PRA/VL_DA_LOGFR.


*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 DOC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PRA/VL_DA_LOGFR-DOC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PRA/VL_DA_LOGFR-DOC_NO.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field OICONTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/PRA/VL_DA_LOGFR-OICONTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/PRA/VL_DA_LOGFR-OICONTNR.
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_/PRA/VL_DA_LOGFR_STR, 
MANDT TYPE STRING,
DOC_NO TYPE STRING,
DOC_YEAR TYPE STRING,
LINE_NO TYPE STRING,
POS_NO TYPE STRING,
GUID TYPE STRING,
PRICE_CHG_LVL TYPE STRING,
SD_FRML TYPE STRING,
GR_VAL_CURR TYPE STRING,
ACTL_GR_VAL_AM TYPE STRING,
ENTL_GR_VAL_AM TYPE STRING,
SETT_GR_VAL_AM TYPE STRING,
STNDEDQ_CD TYPE STRING,
BY_SLL_CT_NO TYPE STRING,
BY_SLL_VAL_CURR TYPE STRING,
BY_SLL_VAL TYPE STRING,
LSE_VAL_CURR TYPE STRING,
LSE_VAL TYPE STRING,
BRD_CD TYPE STRING,
ALT_CT_NO TYPE STRING,
MORE_ALT_CT_FL TYPE STRING,
SECT_BURKS TYPE STRING,
SECT_VNAME TYPE STRING,
SECT_DOI_NO TYPE STRING,
POSNR TYPE STRING,
GAS_PLT_VNAME_NO TYPE STRING,
GAS_PLANT_DOI_NO TYPE STRING,
SLID_SCAL_IND TYPE STRING,
ADJ_CT_DECM TYPE STRING,
UOM TYPE STRING,
KS_ADP_VAL TYPE STRING,
PRICE_PER_UNIT TYPE STRING,
PRICE_PUNIT_CURR TYPE STRING,
KALSM TYPE STRING,
KSCHL TYPE STRING,
PC_WL_NO TYPE STRING,
PC_WC_NO TYPE STRING,
PC_MP_NO TYPE STRING,
OICONTNR TYPE STRING,
KS_TAX_CLS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/PRA/VL_DA_LOGFR_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_/PRA/VL_DA_LOGFR_STR-MANDT sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-DOC_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-DOC_YEAR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-LINE_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-POS_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-GUID sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-PRICE_CHG_LVL sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-SD_FRML sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-GR_VAL_CURR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-ACTL_GR_VAL_AM sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-ENTL_GR_VAL_AM sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-SETT_GR_VAL_AM sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-STNDEDQ_CD sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-BY_SLL_CT_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-BY_SLL_VAL_CURR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-BY_SLL_VAL sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-LSE_VAL_CURR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-LSE_VAL sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-BRD_CD sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-ALT_CT_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-MORE_ALT_CT_FL sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-SECT_BURKS sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-SECT_VNAME sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-SECT_DOI_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-POSNR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-GAS_PLT_VNAME_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-GAS_PLANT_DOI_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-SLID_SCAL_IND sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-ADJ_CT_DECM sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-UOM sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-KS_ADP_VAL sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-PRICE_PER_UNIT sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-PRICE_PUNIT_CURR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-KALSM sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-KSCHL sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-PC_WL_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-PC_WC_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-PC_MP_NO sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-OICONTNR sy-vline 
WA_/PRA/VL_DA_LOGFR_STR-KS_TAX_CLS sy-vline      INTO ld_text SEPARATED BY SPACE.

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