ABAP Select data from SAP table TBZ3A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TBZ3A 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 TBZ3A. 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 TBZ3A 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_TBZ3A TYPE STANDARD TABLE OF TBZ3A,
      WA_TBZ3A TYPE TBZ3A,
      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: <TBZ3A> TYPE TBZ3A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TBZ3A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TBZ3A
  INTO TABLE IT_TBZ3A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TBZ3A
*  INTO TABLE @DATA(IT_TBZ3A2).
*--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_TBZ3A INDEX 1 INTO DATA(WA_TBZ3A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TBZ3A ASSIGNING <TBZ3A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TBZ3A>-CLIENT = 1.
<TBZ3A>-OBJAP = 1.
<TBZ3A>-DYNID = 1.
<TBZ3A>-XSCIN = 1.
<TBZ3A>-XSCDT = 1.

ENDLOOP.

LOOP AT IT_TBZ3A INTO WA_TBZ3A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TBZ3A-DYART, sy-vline,
  WA_TBZ3A-XSCGP, sy-vline,
  WA_TBZ3A-TRDYN, sy-vline,
  WA_TBZ3A-XSCOT, sy-vline,
  WA_TBZ3A-FNAME, sy-vline,
  WA_TBZ3A-XSTRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TBZ3A 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_TBZ3A 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_TBZ3A INTO WA_TBZ3A.


*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_TBZ3A_STR, 
CLIENT TYPE STRING,
OBJAP TYPE STRING,
DYNID TYPE STRING,
XSCIN TYPE STRING,
XSCDT TYPE STRING,
DYART TYPE STRING,
XSCGP TYPE STRING,
TRDYN TYPE STRING,
XSCOT TYPE STRING,
FNAME TYPE STRING,
XSTRP TYPE STRING,
XSCFS TYPE STRING,
XSCPP TYPE STRING,
DYTYP TYPE STRING,
SPALL TYPE STRING,
ZEILO TYPE STRING,
SPALR TYPE STRING,
ZEILU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TBZ3A_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_TBZ3A_STR-CLIENT sy-vline 
WA_TBZ3A_STR-OBJAP sy-vline 
WA_TBZ3A_STR-DYNID sy-vline 
WA_TBZ3A_STR-XSCIN sy-vline 
WA_TBZ3A_STR-XSCDT sy-vline 
WA_TBZ3A_STR-DYART sy-vline 
WA_TBZ3A_STR-XSCGP sy-vline 
WA_TBZ3A_STR-TRDYN sy-vline 
WA_TBZ3A_STR-XSCOT sy-vline 
WA_TBZ3A_STR-FNAME sy-vline 
WA_TBZ3A_STR-XSTRP sy-vline 
WA_TBZ3A_STR-XSCFS sy-vline 
WA_TBZ3A_STR-XSCPP sy-vline 
WA_TBZ3A_STR-DYTYP sy-vline 
WA_TBZ3A_STR-SPALL sy-vline 
WA_TBZ3A_STR-ZEILO sy-vline 
WA_TBZ3A_STR-SPALR sy-vline 
WA_TBZ3A_STR-ZEILU sy-vline      INTO ld_text SEPARATED BY SPACE.

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