ABAP Select data from SAP table T881 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T881 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 T881. 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 T881 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_T881 TYPE STANDARD TABLE OF T881,
      WA_T881 TYPE T881,
      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: <T881> TYPE T881.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T881.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T881
  INTO TABLE IT_T881.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T881
*  INTO TABLE @DATA(IT_T8812).
*--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_T881 INDEX 1 INTO DATA(WA_T8812).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T881 ASSIGNING <T881>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T881>-MANDT = 1.
<T881>-RLDNR = 1.
<T881>-GCURR = 1.
<T881>-CLASS = 1.
<T881>-TYP = 1.

ENDLOOP.

LOOP AT IT_T881 INTO WA_T881.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T881-TRCUR, sy-vline,
  WA_T881-LCCUR, sy-vline,
  WA_T881-RCCUR, sy-vline,
  WA_T881-OCCUR, sy-vline,
  WA_T881-QUANT, sy-vline,
  WA_T881-ATQNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T881 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_T881 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_T881 INTO WA_T881.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T881-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T881-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T881-DLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T881-DLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T881-KLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T881-KLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T881-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T881-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORIENT_LEDGER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T881-ORIENT_LEDGER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T881-ORIENT_LEDGER.
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_T881_STR, 
MANDT TYPE STRING,
RLDNR TYPE STRING,
GCURR TYPE STRING,
CLASS TYPE STRING,
TYP TYPE STRING,
TRCUR TYPE STRING,
LCCUR TYPE STRING,
RCCUR TYPE STRING,
OCCUR TYPE STRING,
QUANT TYPE STRING,
ATQNT TYPE STRING,
TAB TYPE STRING,
RCOPY TYPE STRING,
SHKZ TYPE STRING,
GLSIP TYPE STRING,
VORTRAG TYPE STRING,
DLDNR TYPE STRING,
XDLDNR TYPE STRING,
CURT1 TYPE STRING,
CURT2 TYPE STRING,
CURT3 TYPE STRING,
V2POST TYPE STRING,
LCTYP TYPE STRING,
FIX TYPE STRING,
POST TYPE STRING,
ROLLUP TYPE STRING,
DEPLD TYPE STRING,
APPL TYPE STRING,
SUBAPPL TYPE STRING,
KOMP TYPE STRING,
GZLEDGER TYPE STRING,
EXIT TYPE STRING,
KLDNR TYPE STRING,
LOGSYS TYPE STRING,
VALUTYP TYPE STRING,
GCOMPRESS TYPE STRING,
SPLITMETHD TYPE STRING,
DATE_DET_POPER TYPE STRING,
GLFLEX TYPE STRING,
XLEADING TYPE STRING,
ORIENT_LEDGER TYPE STRING,
AVG_ROLLUP TYPE STRING,
XCASH_LEDGER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T881_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_T881_STR-MANDT sy-vline 
WA_T881_STR-RLDNR sy-vline 
WA_T881_STR-GCURR sy-vline 
WA_T881_STR-CLASS sy-vline 
WA_T881_STR-TYP sy-vline 
WA_T881_STR-TRCUR sy-vline 
WA_T881_STR-LCCUR sy-vline 
WA_T881_STR-RCCUR sy-vline 
WA_T881_STR-OCCUR sy-vline 
WA_T881_STR-QUANT sy-vline 
WA_T881_STR-ATQNT sy-vline 
WA_T881_STR-TAB sy-vline 
WA_T881_STR-RCOPY sy-vline 
WA_T881_STR-SHKZ sy-vline 
WA_T881_STR-GLSIP sy-vline 
WA_T881_STR-VORTRAG sy-vline 
WA_T881_STR-DLDNR sy-vline 
WA_T881_STR-XDLDNR sy-vline 
WA_T881_STR-CURT1 sy-vline 
WA_T881_STR-CURT2 sy-vline 
WA_T881_STR-CURT3 sy-vline 
WA_T881_STR-V2POST sy-vline 
WA_T881_STR-LCTYP sy-vline 
WA_T881_STR-FIX sy-vline 
WA_T881_STR-POST sy-vline 
WA_T881_STR-ROLLUP sy-vline 
WA_T881_STR-DEPLD sy-vline 
WA_T881_STR-APPL sy-vline 
WA_T881_STR-SUBAPPL sy-vline 
WA_T881_STR-KOMP sy-vline 
WA_T881_STR-GZLEDGER sy-vline 
WA_T881_STR-EXIT sy-vline 
WA_T881_STR-KLDNR sy-vline 
WA_T881_STR-LOGSYS sy-vline 
WA_T881_STR-VALUTYP sy-vline 
WA_T881_STR-GCOMPRESS sy-vline 
WA_T881_STR-SPLITMETHD sy-vline 
WA_T881_STR-DATE_DET_POPER sy-vline 
WA_T881_STR-GLFLEX sy-vline 
WA_T881_STR-XLEADING sy-vline 
WA_T881_STR-ORIENT_LEDGER sy-vline 
WA_T881_STR-AVG_ROLLUP sy-vline 
WA_T881_STR-XCASH_LEDGER sy-vline      INTO ld_text SEPARATED BY SPACE.

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