ABAP Select data from SAP table ERTPDAYTYPEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ERTPDAYTYPEX
*  INTO TABLE @DATA(IT_ERTPDAYTYPEX2).
*--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_ERTPDAYTYPEX INDEX 1 INTO DATA(WA_ERTPDAYTYPEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ERTPDAYTYPEX>-MANDT = 1.
<ERTPDAYTYPEX>-DAYTYPEBLOCK = 1.
<ERTPDAYTYPEX>-DAYTYPEXID = 1.
<ERTPDAYTYPEX>-CSNO = 1.
<ERTPDAYTYPEX>-DAYFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ERTPDAYTYPEX-MONTHFROM, sy-vline,
  WA_ERTPDAYTYPEX-DAYTO, sy-vline,
  WA_ERTPDAYTYPEX-MONTHTO, sy-vline,
  WA_ERTPDAYTYPEX-YEARFROM, sy-vline,
  WA_ERTPDAYTYPEX-YEARTO, sy-vline,
  WA_ERTPDAYTYPEX-DAYTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ERTPDAYTYPEX 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_ERTPDAYTYPEX 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_ERTPDAYTYPEX INTO WA_ERTPDAYTYPEX.


*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_ERTPDAYTYPEX_STR, 
MANDT TYPE STRING,
DAYTYPEBLOCK TYPE STRING,
DAYTYPEXID TYPE STRING,
CSNO TYPE STRING,
DAYFROM TYPE STRING,
MONTHFROM TYPE STRING,
DAYTO TYPE STRING,
MONTHTO TYPE STRING,
YEARFROM TYPE STRING,
YEARTO TYPE STRING,
DAYTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ERTPDAYTYPEX_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_ERTPDAYTYPEX_STR-MANDT sy-vline 
WA_ERTPDAYTYPEX_STR-DAYTYPEBLOCK sy-vline 
WA_ERTPDAYTYPEX_STR-DAYTYPEXID sy-vline 
WA_ERTPDAYTYPEX_STR-CSNO sy-vline 
WA_ERTPDAYTYPEX_STR-DAYFROM sy-vline 
WA_ERTPDAYTYPEX_STR-MONTHFROM sy-vline 
WA_ERTPDAYTYPEX_STR-DAYTO sy-vline 
WA_ERTPDAYTYPEX_STR-MONTHTO sy-vline 
WA_ERTPDAYTYPEX_STR-YEARFROM sy-vline 
WA_ERTPDAYTYPEX_STR-YEARTO sy-vline 
WA_ERTPDAYTYPEX_STR-DAYTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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