ABAP Select data from SAP table TST04IO64 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TST04IO64 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 TST04IO64. 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 TST04IO64 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_TST04IO64 TYPE STANDARD TABLE OF TST04IO64,
      WA_TST04IO64 TYPE TST04IO64,
      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: <TST04IO64> TYPE TST04IO64.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TST04IO64.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TST04IO64
  INTO TABLE IT_TST04IO64.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TST04IO64
*  INTO TABLE @DATA(IT_TST04IO642).
*--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_TST04IO64 INDEX 1 INTO DATA(WA_TST04IO642).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TST04IO64 ASSIGNING <TST04IO64>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TST04IO64>-CHUNKNUM = 1.
<TST04IO64>-ISMIRROR = 1.
<TST04IO64>-DBSNAME = 1.
<TST04IO64>-CHKSIZE = 1.
<TST04IO64>-NFREE = 1.

ENDLOOP.

LOOP AT IT_TST04IO64 INTO WA_TST04IO64.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TST04IO64-FNAME, sy-vline,
  WA_TST04IO64-MFNAME, sy-vline,
  WA_TST04IO64-READTIME, sy-vline,
  WA_TST04IO64-WRITETIME, sy-vline,
  WA_TST04IO64-MREADTIME, sy-vline,
  WA_TST04IO64-MWRITETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TST04IO64 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_TST04IO64 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_TST04IO64 INTO WA_TST04IO64.


*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_TST04IO64_STR, 
CHUNKNUM TYPE STRING,
ISMIRROR TYPE STRING,
DBSNAME TYPE STRING,
CHKSIZE TYPE STRING,
NFREE TYPE STRING,
FNAME TYPE STRING,
MFNAME TYPE STRING,
READTIME TYPE STRING,
WRITETIME TYPE STRING,
MREADTIME TYPE STRING,
MWRITETIME TYPE STRING,
READS_S TYPE STRING,
PAGSREAD_S TYPE STRING,
WRITES_S TYPE STRING,
PAGSWRIT_S TYPE STRING,
MREADS_S TYPE STRING,
MPGSREAD_S TYPE STRING,
MWRITES_S TYPE STRING,
MPGSWRIT_S TYPE STRING,
READS_C TYPE STRING,
PAGSREAD_C TYPE STRING,
WRITES_C TYPE STRING,
PAGSWRIT_C TYPE STRING,
MREADS_C TYPE STRING,
MPGSREAD_C TYPE STRING,
MWRITES_C TYPE STRING,
MPGSWRIT_C TYPE STRING,
READS_R TYPE STRING,
PAGSREAD_R TYPE STRING,
WRITES_R TYPE STRING,
PAGSWRIT_R TYPE STRING,
MREADS_R TYPE STRING,
MPGSREAD_R TYPE STRING,
MWRITES_R TYPE STRING,
MPGSWRIT_R TYPE STRING,
READS_P TYPE STRING,
PAGSREAD_P TYPE STRING,
WRITES_P TYPE STRING,
PAGSWRIT_P TYPE STRING,
MREADS_P TYPE STRING,
MPGSREAD_P TYPE STRING,
MWRITES_P TYPE STRING,
MPGSWRIT_P TYPE STRING,
READS_L TYPE STRING,
PAGSREAD_L TYPE STRING,
WRITES_L TYPE STRING,
PAGSWRIT_L TYPE STRING,
MREADS_L TYPE STRING,
MPGSREAD_L TYPE STRING,
MWRITES_L TYPE STRING,
MPGSWRIT_L TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TST04IO64_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_TST04IO64_STR-CHUNKNUM sy-vline 
WA_TST04IO64_STR-ISMIRROR sy-vline 
WA_TST04IO64_STR-DBSNAME sy-vline 
WA_TST04IO64_STR-CHKSIZE sy-vline 
WA_TST04IO64_STR-NFREE sy-vline 
WA_TST04IO64_STR-FNAME sy-vline 
WA_TST04IO64_STR-MFNAME sy-vline 
WA_TST04IO64_STR-READTIME sy-vline 
WA_TST04IO64_STR-WRITETIME sy-vline 
WA_TST04IO64_STR-MREADTIME sy-vline 
WA_TST04IO64_STR-MWRITETIME sy-vline 
WA_TST04IO64_STR-READS_S sy-vline 
WA_TST04IO64_STR-PAGSREAD_S sy-vline 
WA_TST04IO64_STR-WRITES_S sy-vline 
WA_TST04IO64_STR-PAGSWRIT_S sy-vline 
WA_TST04IO64_STR-MREADS_S sy-vline 
WA_TST04IO64_STR-MPGSREAD_S sy-vline 
WA_TST04IO64_STR-MWRITES_S sy-vline 
WA_TST04IO64_STR-MPGSWRIT_S sy-vline 
WA_TST04IO64_STR-READS_C sy-vline 
WA_TST04IO64_STR-PAGSREAD_C sy-vline 
WA_TST04IO64_STR-WRITES_C sy-vline 
WA_TST04IO64_STR-PAGSWRIT_C sy-vline 
WA_TST04IO64_STR-MREADS_C sy-vline 
WA_TST04IO64_STR-MPGSREAD_C sy-vline 
WA_TST04IO64_STR-MWRITES_C sy-vline 
WA_TST04IO64_STR-MPGSWRIT_C sy-vline 
WA_TST04IO64_STR-READS_R sy-vline 
WA_TST04IO64_STR-PAGSREAD_R sy-vline 
WA_TST04IO64_STR-WRITES_R sy-vline 
WA_TST04IO64_STR-PAGSWRIT_R sy-vline 
WA_TST04IO64_STR-MREADS_R sy-vline 
WA_TST04IO64_STR-MPGSREAD_R sy-vline 
WA_TST04IO64_STR-MWRITES_R sy-vline 
WA_TST04IO64_STR-MPGSWRIT_R sy-vline 
WA_TST04IO64_STR-READS_P sy-vline 
WA_TST04IO64_STR-PAGSREAD_P sy-vline 
WA_TST04IO64_STR-WRITES_P sy-vline 
WA_TST04IO64_STR-PAGSWRIT_P sy-vline 
WA_TST04IO64_STR-MREADS_P sy-vline 
WA_TST04IO64_STR-MPGSREAD_P sy-vline 
WA_TST04IO64_STR-MWRITES_P sy-vline 
WA_TST04IO64_STR-MPGSWRIT_P sy-vline 
WA_TST04IO64_STR-READS_L sy-vline 
WA_TST04IO64_STR-PAGSREAD_L sy-vline 
WA_TST04IO64_STR-WRITES_L sy-vline 
WA_TST04IO64_STR-PAGSWRIT_L sy-vline 
WA_TST04IO64_STR-MREADS_L sy-vline 
WA_TST04IO64_STR-MPGSREAD_L sy-vline 
WA_TST04IO64_STR-MWRITES_L sy-vline 
WA_TST04IO64_STR-MPGSWRIT_L sy-vline      INTO ld_text SEPARATED BY SPACE.

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