ABAP Select data from SAP table T8A00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T8A00 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 T8A00. 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 T8A00 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_T8A00 TYPE STANDARD TABLE OF T8A00,
      WA_T8A00 TYPE T8A00,
      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: <T8A00> TYPE T8A00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T8A00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T8A00
  INTO TABLE IT_T8A00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T8A00
*  INTO TABLE @DATA(IT_T8A002).
*--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_T8A00 INDEX 1 INTO DATA(WA_T8A002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T8A00 ASSIGNING <T8A00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T8A00>-MANDT = 1.
<T8A00>-KOKRS = 1.
<T8A00>-MTART = 1.
<T8A00>-BKLAS = 1.
<T8A00>-BWMOD = 1.

ENDLOOP.

LOOP AT IT_T8A00 INTO WA_T8A00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T8A00-ROHKZ, sy-vline,
  WA_T8A00-PCERL, sy-vline,
  WA_T8A00-PCDBV, sy-vline,
  WA_T8A00-PCLVA, sy-vline,
  WA_T8A00-PCDIF, sy-vline,
  WA_T8A00-PCDBVE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T8A00 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_T8A00 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_T8A00 INTO WA_T8A00.


*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 PCERL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8A00-PCERL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8A00-PCERL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PCDBV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8A00-PCDBV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8A00-PCDBV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PCLVA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8A00-PCLVA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8A00-PCLVA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PCDIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8A00-PCDIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8A00-PCDIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PCDBVE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T8A00-PCDBVE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T8A00-PCDBVE.
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_T8A00_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
MTART TYPE STRING,
BKLAS TYPE STRING,
BWMOD TYPE STRING,
ROHKZ TYPE STRING,
PCERL TYPE STRING,
PCDBV TYPE STRING,
PCLVA TYPE STRING,
PCDIF TYPE STRING,
PCDBVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T8A00_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_T8A00_STR-MANDT sy-vline 
WA_T8A00_STR-KOKRS sy-vline 
WA_T8A00_STR-MTART sy-vline 
WA_T8A00_STR-BKLAS sy-vline 
WA_T8A00_STR-BWMOD sy-vline 
WA_T8A00_STR-ROHKZ sy-vline 
WA_T8A00_STR-PCERL sy-vline 
WA_T8A00_STR-PCDBV sy-vline 
WA_T8A00_STR-PCLVA sy-vline 
WA_T8A00_STR-PCDIF sy-vline 
WA_T8A00_STR-PCDBVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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