ABAP Select data from SAP table FRET into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FRET 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 FRET. 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 FRET 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_FRET TYPE STANDARD TABLE OF FRET,
      WA_FRET TYPE FRET,
      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: <FRET> TYPE FRET.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FRET
*  INTO TABLE @DATA(IT_FRET2).
*--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_FRET INDEX 1 INTO DATA(WA_FRET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FRET>-MANDT = 1.
<FRET>-BTYPB = 1.
<FRET>-BLNRB = 1.
<FRET>-BPOSB = 1.
<FRET>-BTYPA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FRET-BLNRA, sy-vline,
  WA_FRET-BPOSA, sy-vline,
  WA_FRET-GABLV, sy-vline,
  WA_FRET-MATNR, sy-vline,
  WA_FRET-PMENB, sy-vline,
  WA_FRET-PEINB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FRET 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_FRET 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_FRET INTO WA_FRET.


*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 BLNRB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FRET-BLNRB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FRET-BLNRB.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field MD_PROCESS_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FRET-MD_PROCESS_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FRET-MD_PROCESS_ID.
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_FRET_STR, 
MANDT TYPE STRING,
BTYPB TYPE STRING,
BLNRB TYPE STRING,
BPOSB TYPE STRING,
BTYPA TYPE STRING,
BLNRA TYPE STRING,
BPOSA TYPE STRING,
GABLV TYPE STRING,
MATNR TYPE STRING,
PMENB TYPE STRING,
PEINB TYPE STRING,
IMNGB TYPE STRING,
IEINB TYPE STRING,
PMENA TYPE STRING,
PEINA TYPE STRING,
IMNGA TYPE STRING,
IEINA TYPE STRING,
BARTV TYPE STRING,
MNGCD TYPE STRING,
EINCD TYPE STRING,
MNGFT TYPE STRING,
EINFT TYPE STRING,
VERVF TYPE STRING,
MNGVT TYPE STRING,
EINVT TYPE STRING,
MNGPA TYPE STRING,
EINPA TYPE STRING,
WERKA TYPE STRING,
ABNTP TYPE STRING,
ABNNR TYPE STRING,
KZFSA TYPE STRING,
KZVST TYPE STRING,
STSVE TYPE STRING,
STMAN TYPE STRING,
STBES TYPE STRING,
ERFDAT TYPE STRING,
ERFUSR TYPE STRING,
ERFZT TYPE STRING,
LGORT TYPE STRING,
LGNUM TYPE STRING,
MD_ADJUST_EXEC TYPE STRING,
KZVAS TYPE STRING,
IND_UC_SPLIT TYPE STRING,
UEBPO TYPE STRING,
MD_PROCESS_METH TYPE STRING,
MD_PROCESS_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FRET_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_FRET_STR-MANDT sy-vline 
WA_FRET_STR-BTYPB sy-vline 
WA_FRET_STR-BLNRB sy-vline 
WA_FRET_STR-BPOSB sy-vline 
WA_FRET_STR-BTYPA sy-vline 
WA_FRET_STR-BLNRA sy-vline 
WA_FRET_STR-BPOSA sy-vline 
WA_FRET_STR-GABLV sy-vline 
WA_FRET_STR-MATNR sy-vline 
WA_FRET_STR-PMENB sy-vline 
WA_FRET_STR-PEINB sy-vline 
WA_FRET_STR-IMNGB sy-vline 
WA_FRET_STR-IEINB sy-vline 
WA_FRET_STR-PMENA sy-vline 
WA_FRET_STR-PEINA sy-vline 
WA_FRET_STR-IMNGA sy-vline 
WA_FRET_STR-IEINA sy-vline 
WA_FRET_STR-BARTV sy-vline 
WA_FRET_STR-MNGCD sy-vline 
WA_FRET_STR-EINCD sy-vline 
WA_FRET_STR-MNGFT sy-vline 
WA_FRET_STR-EINFT sy-vline 
WA_FRET_STR-VERVF sy-vline 
WA_FRET_STR-MNGVT sy-vline 
WA_FRET_STR-EINVT sy-vline 
WA_FRET_STR-MNGPA sy-vline 
WA_FRET_STR-EINPA sy-vline 
WA_FRET_STR-WERKA sy-vline 
WA_FRET_STR-ABNTP sy-vline 
WA_FRET_STR-ABNNR sy-vline 
WA_FRET_STR-KZFSA sy-vline 
WA_FRET_STR-KZVST sy-vline 
WA_FRET_STR-STSVE sy-vline 
WA_FRET_STR-STMAN sy-vline 
WA_FRET_STR-STBES sy-vline 
WA_FRET_STR-ERFDAT sy-vline 
WA_FRET_STR-ERFUSR sy-vline 
WA_FRET_STR-ERFZT sy-vline 
WA_FRET_STR-LGORT sy-vline 
WA_FRET_STR-LGNUM sy-vline 
WA_FRET_STR-MD_ADJUST_EXEC sy-vline 
WA_FRET_STR-KZVAS sy-vline 
WA_FRET_STR-IND_UC_SPLIT sy-vline 
WA_FRET_STR-UEBPO sy-vline 
WA_FRET_STR-MD_PROCESS_METH sy-vline 
WA_FRET_STR-MD_PROCESS_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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