ABAP Select data from SAP table TXI_T820 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TXI_T820 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 TXI_T820. 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 TXI_T820 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_TXI_T820 TYPE STANDARD TABLE OF TXI_T820,
      WA_TXI_T820 TYPE TXI_T820,
      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: <TXI_T820> TYPE TXI_T820.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TXI_T820.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TXI_T820
  INTO TABLE IT_TXI_T820.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TXI_T820
*  INTO TABLE @DATA(IT_TXI_T8202).
*--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_TXI_T820 INDEX 1 INTO DATA(WA_TXI_T8202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TXI_T820 ASSIGNING <TXI_T820>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TXI_T820>-MANDT = 1.
<TXI_T820>-RPLAN = 1.
<TXI_T820>-SETNR = 1.
<TXI_T820>-DIPER = 1.
<TXI_T820>-FRPER = 1.

ENDLOOP.

LOOP AT IT_TXI_T820 INTO WA_TXI_T820.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TXI_T820-TOPER, sy-vline,
  WA_TXI_T820-CUTYP, sy-vline,
  WA_TXI_T820-MACUD, sy-vline,
  WA_TXI_T820-CSPRED, sy-vline,
  WA_TXI_T820-QSPRED, sy-vline,
  WA_TXI_T820-DOCTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TXI_T820 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_TXI_T820 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_TXI_T820 INTO WA_TXI_T820.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_TXI_T820_STR, 
MANDT TYPE STRING,
RPLAN TYPE STRING,
SETNR TYPE STRING,
DIPER TYPE STRING,
FRPER TYPE STRING,
TOPER TYPE STRING,
CUTYP TYPE STRING,
MACUD TYPE STRING,
CSPRED TYPE STRING,
QSPRED TYPE STRING,
DOCTY TYPE STRING,
VALDIS TYPE STRING,
TXTDIS TYPE STRING,
GL TYPE STRING,
RKK TYPE STRING,
TRCUR TYPE STRING,
CCCUR TYPE STRING,
LCCUR TYPE STRING,
ACCUR TYPE STRING,
RCCUR TYPE STRING,
OCCUR TYPE STRING,
QUANT TYPE STRING,
ATQNT TYPE STRING,
RKL TYPE STRING,
AAQNT TYPE STRING,
AKQNT TYPE STRING,
AOQNT TYPE STRING,
TFCUR TYPE STRING,
TVCUR TYPE STRING,
RKB TYPE STRING,
SAQNT TYPE STRING,
SMQNT TYPE STRING,
TRDIS TYPE STRING,
CCDIS TYPE STRING,
LCDIS TYPE STRING,
ACDIS TYPE STRING,
RCDIS TYPE STRING,
OCDIS TYPE STRING,
QUDIS TYPE STRING,
ATDIS TYPE STRING,
AADIS TYPE STRING,
AKDIS TYPE STRING,
AODIS TYPE STRING,
TFDIS TYPE STRING,
TVDIS TYPE STRING,
SADIS TYPE STRING,
SMDIS TYPE STRING,
CLASS TYPE STRING,
BRGRU TYPE STRING,
CRNAM TYPE STRING,
CRDAT TYPE STRING,
UPNAM TYPE STRING,
UPDAT TYPE STRING,
SET_FIELD TYPE STRING,
CONDENSE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TXI_T820_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_TXI_T820_STR-MANDT sy-vline 
WA_TXI_T820_STR-RPLAN sy-vline 
WA_TXI_T820_STR-SETNR sy-vline 
WA_TXI_T820_STR-DIPER sy-vline 
WA_TXI_T820_STR-FRPER sy-vline 
WA_TXI_T820_STR-TOPER sy-vline 
WA_TXI_T820_STR-CUTYP sy-vline 
WA_TXI_T820_STR-MACUD sy-vline 
WA_TXI_T820_STR-CSPRED sy-vline 
WA_TXI_T820_STR-QSPRED sy-vline 
WA_TXI_T820_STR-DOCTY sy-vline 
WA_TXI_T820_STR-VALDIS sy-vline 
WA_TXI_T820_STR-TXTDIS sy-vline 
WA_TXI_T820_STR-GL sy-vline 
WA_TXI_T820_STR-RKK sy-vline 
WA_TXI_T820_STR-TRCUR sy-vline 
WA_TXI_T820_STR-CCCUR sy-vline 
WA_TXI_T820_STR-LCCUR sy-vline 
WA_TXI_T820_STR-ACCUR sy-vline 
WA_TXI_T820_STR-RCCUR sy-vline 
WA_TXI_T820_STR-OCCUR sy-vline 
WA_TXI_T820_STR-QUANT sy-vline 
WA_TXI_T820_STR-ATQNT sy-vline 
WA_TXI_T820_STR-RKL sy-vline 
WA_TXI_T820_STR-AAQNT sy-vline 
WA_TXI_T820_STR-AKQNT sy-vline 
WA_TXI_T820_STR-AOQNT sy-vline 
WA_TXI_T820_STR-TFCUR sy-vline 
WA_TXI_T820_STR-TVCUR sy-vline 
WA_TXI_T820_STR-RKB sy-vline 
WA_TXI_T820_STR-SAQNT sy-vline 
WA_TXI_T820_STR-SMQNT sy-vline 
WA_TXI_T820_STR-TRDIS sy-vline 
WA_TXI_T820_STR-CCDIS sy-vline 
WA_TXI_T820_STR-LCDIS sy-vline 
WA_TXI_T820_STR-ACDIS sy-vline 
WA_TXI_T820_STR-RCDIS sy-vline 
WA_TXI_T820_STR-OCDIS sy-vline 
WA_TXI_T820_STR-QUDIS sy-vline 
WA_TXI_T820_STR-ATDIS sy-vline 
WA_TXI_T820_STR-AADIS sy-vline 
WA_TXI_T820_STR-AKDIS sy-vline 
WA_TXI_T820_STR-AODIS sy-vline 
WA_TXI_T820_STR-TFDIS sy-vline 
WA_TXI_T820_STR-TVDIS sy-vline 
WA_TXI_T820_STR-SADIS sy-vline 
WA_TXI_T820_STR-SMDIS sy-vline 
WA_TXI_T820_STR-CLASS sy-vline 
WA_TXI_T820_STR-BRGRU sy-vline 
WA_TXI_T820_STR-CRNAM sy-vline 
WA_TXI_T820_STR-CRDAT sy-vline 
WA_TXI_T820_STR-UPNAM sy-vline 
WA_TXI_T820_STR-UPDAT sy-vline 
WA_TXI_T820_STR-SET_FIELD sy-vline 
WA_TXI_T820_STR-CONDENSE sy-vline      INTO ld_text SEPARATED BY SPACE.

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