ABAP Select data from SAP table PSG_ALV_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_ALV_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_ALV_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_ALV_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_ALV_CASINO TYPE STANDARD TABLE OF PSG_ALV_CASINO,
      WA_PSG_ALV_CASINO TYPE PSG_ALV_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_ALV_CASINO> TYPE PSG_ALV_CASINO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSG_ALV_CASINO
*  INTO TABLE @DATA(IT_PSG_ALV_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_ALV_CASINO INDEX 1 INTO DATA(WA_PSG_ALV_CASINO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSG_ALV_CASINO>-PERNR = 1.
<PSG_ALV_CASINO>-ENAME = 1.
<PSG_ALV_CASINO>-WERKS = 1.
<PSG_ALV_CASINO>-BTRTL = 1.
<PSG_ALV_CASINO>-STELL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSG_ALV_CASINO-STLTX, sy-vline,
  WA_PSG_ALV_CASINO-PLANS, sy-vline,
  WA_PSG_ALV_CASINO-PLSTX, sy-vline,
  WA_PSG_ALV_CASINO-OFGRP, sy-vline,
  WA_PSG_ALV_CASINO-SUBDT, sy-vline,
  WA_PSG_ALV_CASINO-CANAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSG_ALV_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_ALV_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_ALV_CASINO INTO WA_PSG_ALV_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.
ENDFORM. 

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

TYPES: BEGIN OF T_PSG_ALV_CASINO_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
STELL TYPE STRING,
STLTX TYPE STRING,
PLANS TYPE STRING,
PLSTX TYPE STRING,
OFGRP TYPE STRING,
SUBDT TYPE STRING,
CANAM TYPE STRING,
CANAM1 TYPE STRING,
CANAT TYPE STRING,
BEGDT TYPE STRING,
BEGTI TYPE STRING,
ENDDT TYPE STRING,
ENDTI TYPE STRING,
DURATION TYPE STRING,
VISIT TYPE STRING,
VISIT1 TYPE STRING,
FLAG TYPE STRING,
PASTY TYPE STRING,
PURDT TYPE STRING,
PEXDT TYPE STRING,
EEREM TYPE STRING,
SUBST TYPE STRING,
VERST TYPE STRING,
APPST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSG_ALV_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_ALV_CASINO_STR-PERNR sy-vline 
WA_PSG_ALV_CASINO_STR-ENAME sy-vline 
WA_PSG_ALV_CASINO_STR-WERKS sy-vline 
WA_PSG_ALV_CASINO_STR-BTRTL sy-vline 
WA_PSG_ALV_CASINO_STR-STELL sy-vline 
WA_PSG_ALV_CASINO_STR-STLTX sy-vline 
WA_PSG_ALV_CASINO_STR-PLANS sy-vline 
WA_PSG_ALV_CASINO_STR-PLSTX sy-vline 
WA_PSG_ALV_CASINO_STR-OFGRP sy-vline 
WA_PSG_ALV_CASINO_STR-SUBDT sy-vline 
WA_PSG_ALV_CASINO_STR-CANAM sy-vline 
WA_PSG_ALV_CASINO_STR-CANAM1 sy-vline 
WA_PSG_ALV_CASINO_STR-CANAT sy-vline 
WA_PSG_ALV_CASINO_STR-BEGDT sy-vline 
WA_PSG_ALV_CASINO_STR-BEGTI sy-vline 
WA_PSG_ALV_CASINO_STR-ENDDT sy-vline 
WA_PSG_ALV_CASINO_STR-ENDTI sy-vline 
WA_PSG_ALV_CASINO_STR-DURATION sy-vline 
WA_PSG_ALV_CASINO_STR-VISIT sy-vline 
WA_PSG_ALV_CASINO_STR-VISIT1 sy-vline 
WA_PSG_ALV_CASINO_STR-FLAG sy-vline 
WA_PSG_ALV_CASINO_STR-PASTY sy-vline 
WA_PSG_ALV_CASINO_STR-PURDT sy-vline 
WA_PSG_ALV_CASINO_STR-PEXDT sy-vline 
WA_PSG_ALV_CASINO_STR-EEREM sy-vline 
WA_PSG_ALV_CASINO_STR-SUBST sy-vline 
WA_PSG_ALV_CASINO_STR-VERST sy-vline 
WA_PSG_ALV_CASINO_STR-APPST sy-vline      INTO ld_text SEPARATED BY SPACE.

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