ABAP Select data from SAP table PSG_MAIL_CASINO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSG_MAIL_CASINO
*  INTO TABLE @DATA(IT_PSG_MAIL_CASINO2).
*--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_PSG_MAIL_CASINO INDEX 1 INTO DATA(WA_PSG_MAIL_CASINO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSG_MAIL_CASINO>-FLAG = 1.
<PSG_MAIL_CASINO>-ENAME = 1.
<PSG_MAIL_CASINO>-ICNUM = 1.
<PSG_MAIL_CASINO>-PLANS = 1.
<PSG_MAIL_CASINO>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSG_MAIL_CASINO-ORGEH, sy-vline,
  WA_PSG_MAIL_CASINO-BUKRS, sy-vline,
  WA_PSG_MAIL_CASINO-PERSG, sy-vline,
  WA_PSG_MAIL_CASINO-ABKRS, sy-vline,
  WA_PSG_MAIL_CASINO-STELL, sy-vline,
  WA_PSG_MAIL_CASINO-PERSK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSG_MAIL_CASINO 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_PSG_MAIL_CASINO 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_PSG_MAIL_CASINO INTO WA_PSG_MAIL_CASINO.


*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 GJAHR, internal->external for field DEC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PSG_MAIL_CASINO-DEC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSG_MAIL_CASINO-DEC_YEAR.
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_PSG_MAIL_CASINO_STR, 
FLAG TYPE STRING,
ENAME TYPE STRING,
ICNUM TYPE STRING,
PLANS TYPE STRING,
WERKS TYPE STRING,
ORGEH TYPE STRING,
BUKRS TYPE STRING,
PERSG TYPE STRING,
ABKRS TYPE STRING,
STELL TYPE STRING,
PERSK TYPE STRING,
PERNR TYPE STRING,
DIVIS TYPE STRING,
DVTXT TYPE STRING,
OFGRP TYPE STRING,
OFGRX TYPE STRING,
CANAM TYPE STRING,
CANAT TYPE STRING,
PASTY TYPE STRING,
PASTT TYPE STRING,
PURDT TYPE STRING,
PEXDT TYPE STRING,
MIN_ENTRY TYPE STRING,
DEC_MONTH TYPE STRING,
MONTH_TXT TYPE STRING,
DEC_YEAR TYPE STRING,
SUBDT TYPE STRING,
CAS_VISIT TYPE STRING,
PLSTX TYPE STRING,
ORGTX TYPE STRING,
BUTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSG_MAIL_CASINO_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_PSG_MAIL_CASINO_STR-FLAG sy-vline 
WA_PSG_MAIL_CASINO_STR-ENAME sy-vline 
WA_PSG_MAIL_CASINO_STR-ICNUM sy-vline 
WA_PSG_MAIL_CASINO_STR-PLANS sy-vline 
WA_PSG_MAIL_CASINO_STR-WERKS sy-vline 
WA_PSG_MAIL_CASINO_STR-ORGEH sy-vline 
WA_PSG_MAIL_CASINO_STR-BUKRS sy-vline 
WA_PSG_MAIL_CASINO_STR-PERSG sy-vline 
WA_PSG_MAIL_CASINO_STR-ABKRS sy-vline 
WA_PSG_MAIL_CASINO_STR-STELL sy-vline 
WA_PSG_MAIL_CASINO_STR-PERSK sy-vline 
WA_PSG_MAIL_CASINO_STR-PERNR sy-vline 
WA_PSG_MAIL_CASINO_STR-DIVIS sy-vline 
WA_PSG_MAIL_CASINO_STR-DVTXT sy-vline 
WA_PSG_MAIL_CASINO_STR-OFGRP sy-vline 
WA_PSG_MAIL_CASINO_STR-OFGRX sy-vline 
WA_PSG_MAIL_CASINO_STR-CANAM sy-vline 
WA_PSG_MAIL_CASINO_STR-CANAT sy-vline 
WA_PSG_MAIL_CASINO_STR-PASTY sy-vline 
WA_PSG_MAIL_CASINO_STR-PASTT sy-vline 
WA_PSG_MAIL_CASINO_STR-PURDT sy-vline 
WA_PSG_MAIL_CASINO_STR-PEXDT sy-vline 
WA_PSG_MAIL_CASINO_STR-MIN_ENTRY sy-vline 
WA_PSG_MAIL_CASINO_STR-DEC_MONTH sy-vline 
WA_PSG_MAIL_CASINO_STR-MONTH_TXT sy-vline 
WA_PSG_MAIL_CASINO_STR-DEC_YEAR sy-vline 
WA_PSG_MAIL_CASINO_STR-SUBDT sy-vline 
WA_PSG_MAIL_CASINO_STR-CAS_VISIT sy-vline 
WA_PSG_MAIL_CASINO_STR-PLSTX sy-vline 
WA_PSG_MAIL_CASINO_STR-ORGTX sy-vline 
WA_PSG_MAIL_CASINO_STR-BUTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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