ABAP Select data from SAP table CRMT_APO_ATP_LOGIC_SWITCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMT_APO_ATP_LOGIC_SWITCH
*  INTO TABLE @DATA(IT_CRMT_APO_ATP_LOGIC_SWITCH2).
*--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_CRMT_APO_ATP_LOGIC_SWITCH INDEX 1 INTO DATA(WA_CRMT_APO_ATP_LOGIC_SWITCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMT_APO_ATP_LOGIC_SWITCH>-CORRELATION_MIN_COM = 1.
<CRMT_APO_ATP_LOGIC_SWITCH>-STANDARD_CORRELATION = 1.
<CRMT_APO_ATP_LOGIC_SWITCH>-BEGIN_OF_KINDS = 1.
<CRMT_APO_ATP_LOGIC_SWITCH>-SHOW_ATP_OVERVIEW = 1.
<CRMT_APO_ATP_LOGIC_SWITCH>-OVERVIEW_QUOTA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMT_APO_ATP_LOGIC_SWITCH-OVERVIEW_PREPLANNING, sy-vline,
  WA_CRMT_APO_ATP_LOGIC_SWITCH-DIALOG_ATP_SUGGESTION, sy-vline,
  WA_CRMT_APO_ATP_LOGIC_SWITCH-DIALOG_DELIVERY_SUGGESTION, sy-vline,
  WA_CRMT_APO_ATP_LOGIC_SWITCH-DIALOG_ENVIROM_ATP, sy-vline,
  WA_CRMT_APO_ATP_LOGIC_SWITCH-DIALOG_ENVIROM_QUOTA, sy-vline,
  WA_CRMT_APO_ATP_LOGIC_SWITCH-DIALOG_ENVIROM_PREPLANNING, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMT_APO_ATP_LOGIC_SWITCH 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_CRMT_APO_ATP_LOGIC_SWITCH 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_CRMT_APO_ATP_LOGIC_SWITCH INTO WA_CRMT_APO_ATP_LOGIC_SWITCH.


*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_CRMT_APO_ATP_LOGIC_SWITCH_STR, 
CORRELATION_MIN_COM TYPE STRING,
STANDARD_CORRELATION TYPE STRING,
BEGIN_OF_KINDS TYPE STRING,
SHOW_ATP_OVERVIEW TYPE STRING,
OVERVIEW_QUOTA TYPE STRING,
OVERVIEW_PREPLANNING TYPE STRING,
DIALOG_ATP_SUGGESTION TYPE STRING,
DIALOG_DELIVERY_SUGGESTION TYPE STRING,
DIALOG_ENVIROM_ATP TYPE STRING,
DIALOG_ENVIROM_QUOTA TYPE STRING,
DIALOG_ENVIROM_PREPLANNING TYPE STRING,
MESSAGES_OUTPUT TYPE STRING,
GROUP_ATP_LIST TYPE STRING,
SHOW_HIERAR_ATP TYPE STRING,
END_OF_KINDS TYPE STRING,
READ_CUMULATED_REC TYPE STRING,
READ_SINGLE_REC TYPE STRING,
ACTIVATE_DELIVERY_SCHEDULING TYPE STRING,
ACTIVATE_TRANSP_SCHEDULING TYPE STRING,
ACTIVATE_INT_DELETE TYPE STRING,
GRP_CHK_SIMULATION_ONLY TYPE STRING,
GRP_CHK_COMPLETE_DELIVERY TYPE STRING,
GRP_CHK_SCHEDULING TYPE STRING,
SUPRESS_READ_LOCATIONS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMT_APO_ATP_LOGIC_SWITCH_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_CRMT_APO_ATP_LOGIC_SWITCH_STR-CORRELATION_MIN_COM sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-STANDARD_CORRELATION sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-BEGIN_OF_KINDS sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-SHOW_ATP_OVERVIEW sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-OVERVIEW_QUOTA sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-OVERVIEW_PREPLANNING sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-DIALOG_ATP_SUGGESTION sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-DIALOG_DELIVERY_SUGGESTION sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-DIALOG_ENVIROM_ATP sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-DIALOG_ENVIROM_QUOTA sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-DIALOG_ENVIROM_PREPLANNING sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-MESSAGES_OUTPUT sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-GROUP_ATP_LIST sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-SHOW_HIERAR_ATP sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-END_OF_KINDS sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-READ_CUMULATED_REC sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-READ_SINGLE_REC sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-ACTIVATE_DELIVERY_SCHEDULING sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-ACTIVATE_TRANSP_SCHEDULING sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-ACTIVATE_INT_DELETE sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-GRP_CHK_SIMULATION_ONLY sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-GRP_CHK_COMPLETE_DELIVERY sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-GRP_CHK_SCHEDULING sy-vline 
WA_CRMT_APO_ATP_LOGIC_SWITCH_STR-SUPRESS_READ_LOCATIONS sy-vline      INTO ld_text SEPARATED BY SPACE.

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