ABAP Select data from SAP table PSYMB into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSYMB
*  INTO TABLE @DATA(IT_PSYMB2).
*--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_PSYMB INDEX 1 INTO DATA(WA_PSYMB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSYMB>-SYMKO = 1.
<PSYMB>-LGART = 1.
<PSYMB>-LSTAR = 1.
<PSYMB>-AWART = 1.
<PSYMB>-LGAR1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSYMB-LGAR2, sy-vline,
  WA_PSYMB-LGAR3, sy-vline,
  WA_PSYMB-LGAR4, sy-vline,
  WA_PSYMB-LGAR5, sy-vline,
  WA_PSYMB-LGAR6, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PSYMB 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_PSYMB 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_PSYMB INTO WA_PSYMB.


*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_PSYMB_STR, 
SYMKO TYPE STRING,
LGART TYPE STRING,
LSTAR TYPE STRING,
AWART TYPE STRING,
LGAR1 TYPE STRING,
LGAR2 TYPE STRING,
LGAR3 TYPE STRING,
LGAR4 TYPE STRING,
LGAR5 TYPE STRING,
LGAR6 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSYMB_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_PSYMB_STR-SYMKO sy-vline 
WA_PSYMB_STR-LGART sy-vline 
WA_PSYMB_STR-LSTAR sy-vline 
WA_PSYMB_STR-AWART sy-vline 
WA_PSYMB_STR-LGAR1 sy-vline 
WA_PSYMB_STR-LGAR2 sy-vline 
WA_PSYMB_STR-LGAR3 sy-vline 
WA_PSYMB_STR-LGAR4 sy-vline 
WA_PSYMB_STR-LGAR5 sy-vline 
WA_PSYMB_STR-LGAR6 sy-vline      INTO ld_text SEPARATED BY SPACE.

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