ABAP Select data from SAP table EWM_APPOINTMENT_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWM_APPOINTMENT_ALV
*  INTO TABLE @DATA(IT_EWM_APPOINTMENT_ALV2).
*--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_EWM_APPOINTMENT_ALV INDEX 1 INTO DATA(WA_EWM_APPOINTMENT_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWM_APPOINTMENT_ALV>-TIMESLOT = 1.
<EWM_APPOINTMENT_ALV>-DAY1_SLOTNR = 1.
<EWM_APPOINTMENT_ALV>-DAY1_SLOT_INFO = 1.
<EWM_APPOINTMENT_ALV>-DAY1_ICON = 1.
<EWM_APPOINTMENT_ALV>-DAY2_SLOTNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWM_APPOINTMENT_ALV-DAY2_SLOT_INFO, sy-vline,
  WA_EWM_APPOINTMENT_ALV-DAY2_ICON, sy-vline,
  WA_EWM_APPOINTMENT_ALV-DAY3_SLOTNR, sy-vline,
  WA_EWM_APPOINTMENT_ALV-DAY3_SLOT_INFO, sy-vline,
  WA_EWM_APPOINTMENT_ALV-DAY3_ICON, sy-vline,
  WA_EWM_APPOINTMENT_ALV-DAY4_SLOTNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWM_APPOINTMENT_ALV 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_EWM_APPOINTMENT_ALV 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_EWM_APPOINTMENT_ALV INTO WA_EWM_APPOINTMENT_ALV.


*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_EWM_APPOINTMENT_ALV_STR, 
TIMESLOT TYPE STRING,
DAY1_SLOTNR TYPE STRING,
DAY1_SLOT_INFO TYPE STRING,
DAY1_ICON TYPE STRING,
DAY2_SLOTNR TYPE STRING,
DAY2_SLOT_INFO TYPE STRING,
DAY2_ICON TYPE STRING,
DAY3_SLOTNR TYPE STRING,
DAY3_SLOT_INFO TYPE STRING,
DAY3_ICON TYPE STRING,
DAY4_SLOTNR TYPE STRING,
DAY4_SLOT_INFO TYPE STRING,
DAY4_ICON TYPE STRING,
DAY5_SLOTNR TYPE STRING,
DAY5_SLOT_INFO TYPE STRING,
DAY5_ICON TYPE STRING,
DAY6_SLOTNR TYPE STRING,
DAY6_SLOT_INFO TYPE STRING,
DAY6_ICON TYPE STRING,
DAY7_SLOTNR TYPE STRING,
DAY7_SLOT_INFO TYPE STRING,
DAY7_ICON TYPE STRING,
DAY8_SLOTNR TYPE STRING,
DAY8_SLOT_INFO TYPE STRING,
DAY8_ICON TYPE STRING,
DAY9_SLOTNR TYPE STRING,
DAY9_SLOT_INFO TYPE STRING,
DAY9_ICON TYPE STRING,
DAY10_SLOTNR TYPE STRING,
DAY10_SLOT_INFO TYPE STRING,
DAY10_ICON TYPE STRING,
DAY11_SLOTNR TYPE STRING,
DAY11_SLOT_INFO TYPE STRING,
DAY11_ICON TYPE STRING,
DAY12_SLOTNR TYPE STRING,
DAY12_SLOT_INFO TYPE STRING,
DAY12_ICON TYPE STRING,
DAY13_SLOTNR TYPE STRING,
DAY13_SLOT_INFO TYPE STRING,
DAY13_ICON TYPE STRING,
DAY14_SLOTNR TYPE STRING,
DAY14_SLOT_INFO TYPE STRING,
DAY14_ICON TYPE STRING,
DAY15_SLOTNR TYPE STRING,
DAY15_SLOT_INFO TYPE STRING,
DAY15_ICON TYPE STRING,
DAY16_SLOTNR TYPE STRING,
DAY16_SLOT_INFO TYPE STRING,
DAY16_ICON TYPE STRING,
DAY17_SLOTNR TYPE STRING,
DAY17_SLOT_INFO TYPE STRING,
DAY17_ICON TYPE STRING,
DAY18_SLOTNR TYPE STRING,
DAY18_SLOT_INFO TYPE STRING,
DAY18_ICON TYPE STRING,
DAY19_SLOTNR TYPE STRING,
DAY19_SLOT_INFO TYPE STRING,
DAY19_ICON TYPE STRING,
DAY20_SLOTNR TYPE STRING,
DAY20_SLOT_INFO TYPE STRING,
DAY20_ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWM_APPOINTMENT_ALV_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_EWM_APPOINTMENT_ALV_STR-TIMESLOT sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY1_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY1_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY1_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY2_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY2_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY2_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY3_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY3_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY3_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY4_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY4_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY4_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY5_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY5_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY5_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY6_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY6_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY6_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY7_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY7_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY7_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY8_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY8_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY8_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY9_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY9_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY9_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY10_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY10_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY10_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY11_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY11_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY11_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY12_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY12_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY12_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY13_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY13_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY13_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY14_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY14_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY14_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY15_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY15_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY15_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY16_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY16_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY16_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY17_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY17_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY17_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY18_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY18_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY18_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY19_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY19_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY19_ICON sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY20_SLOTNR sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY20_SLOT_INFO sy-vline 
WA_EWM_APPOINTMENT_ALV_STR-DAY20_ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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