ABAP Select data from SAP table /SAPAPO/CAPREV_RESV_ALV_STRU into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/CAPREV_RESV_ALV_STRU 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 /SAPAPO/CAPREV_RESV_ALV_STRU. 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 /SAPAPO/CAPREV_RESV_ALV_STRU 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_/SAPAPO/CAPREV_RESV_ALV_STRU TYPE STANDARD TABLE OF /SAPAPO/CAPREV_RESV_ALV_STRU,
      WA_/SAPAPO/CAPREV_RESV_ALV_STRU TYPE /SAPAPO/CAPREV_RESV_ALV_STRU,
      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: </SAPAPO/CAPREV_RESV_ALV_STRU> TYPE /SAPAPO/CAPREV_RESV_ALV_STRU.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/CAPREV_RESV_ALV_STRU
  INTO TABLE IT_/SAPAPO/CAPREV_RESV_ALV_STRU.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CAPREV_RESV_ALV_STRU
*  INTO TABLE @DATA(IT_/SAPAPO/CAPREV_RESV_ALV_STRU2).
*--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_/SAPAPO/CAPREV_RESV_ALV_STRU INDEX 1 INTO DATA(WA_/SAPAPO/CAPREV_RESV_ALV_STRU2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/CAPREV_RESV_ALV_STRU ASSIGNING </SAPAPO/CAPREV_RESV_ALV_STRU>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CAPREV_RESV_ALV_STRU>-DATE = 1.
</SAPAPO/CAPREV_RESV_ALV_STRU>-BEGTI = 1.
</SAPAPO/CAPREV_RESV_ALV_STRU>-CAPACITY = 1.
</SAPAPO/CAPREV_RESV_ALV_STRU>-CAPACITY_UNIT = 1.
</SAPAPO/CAPREV_RESV_ALV_STRU>-CONV_CAPACITY = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/CAPREV_RESV_ALV_STRU INTO WA_/SAPAPO/CAPREV_RESV_ALV_STRU.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CAPREV_RESV_ALV_STRU-CONV_CAP_UNIT, sy-vline,
  WA_/SAPAPO/CAPREV_RESV_ALV_STRU-UNRESERVED, sy-vline,
  WA_/SAPAPO/CAPREV_RESV_ALV_STRU-UNALLOCATED, sy-vline,
  WA_/SAPAPO/CAPREV_RESV_ALV_STRU-RELEASE_DATE0, sy-vline,
  WA_/SAPAPO/CAPREV_RESV_ALV_STRU-VALUE1, sy-vline,
  WA_/SAPAPO/CAPREV_RESV_ALV_STRU-RELEASE_DATE1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CAPREV_RESV_ALV_STRU 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_/SAPAPO/CAPREV_RESV_ALV_STRU 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_/SAPAPO/CAPREV_RESV_ALV_STRU INTO WA_/SAPAPO/CAPREV_RESV_ALV_STRU.


*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 CUNIT, internal->external for field CAPACITY_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CAPREV_RESV_ALV_STRU-CAPACITY_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CAPREV_RESV_ALV_STRU-CAPACITY_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field CONV_CAP_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CAPREV_RESV_ALV_STRU-CONV_CAP_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CAPREV_RESV_ALV_STRU-CONV_CAP_UNIT.
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_/SAPAPO/CAPREV_RESV_ALV_STRU_STR, 
DATE TYPE STRING,
BEGTI TYPE STRING,
CAPACITY TYPE STRING,
CAPACITY_UNIT TYPE STRING,
CONV_CAPACITY TYPE STRING,
CONV_CAP_UNIT TYPE STRING,
UNRESERVED TYPE STRING,
UNALLOCATED TYPE STRING,
RELEASE_DATE0 TYPE STRING,
VALUE1 TYPE STRING,
RELEASE_DATE1 TYPE STRING,
VALUE2 TYPE STRING,
RELEASE_DATE2 TYPE STRING,
VALUE3 TYPE STRING,
RELEASE_DATE3 TYPE STRING,
VALUE4 TYPE STRING,
RELEASE_DATE4 TYPE STRING,
VALUE5 TYPE STRING,
RELEASE_DATE5 TYPE STRING,
VALUE6 TYPE STRING,
RELEASE_DATE6 TYPE STRING,
VALUE7 TYPE STRING,
RELEASE_DATE7 TYPE STRING,
VALUE8 TYPE STRING,
RELEASE_DATE8 TYPE STRING,
VALUE9 TYPE STRING,
RELEASE_DATE9 TYPE STRING,
VALUE10 TYPE STRING,
RELEASE_DATE10 TYPE STRING,
VALUE11 TYPE STRING,
RELEASE_DATE11 TYPE STRING,
VALUE12 TYPE STRING,
RELEASE_DATE12 TYPE STRING,
VALUE13 TYPE STRING,
RELEASE_DATE13 TYPE STRING,
VALUE14 TYPE STRING,
RELEASE_DATE14 TYPE STRING,
VALUE15 TYPE STRING,
RELEASE_DATE15 TYPE STRING,
VALUE16 TYPE STRING,
RELEASE_DATE16 TYPE STRING,
VALUE17 TYPE STRING,
RELEASE_DATE17 TYPE STRING,
VALUE18 TYPE STRING,
RELEASE_DATE18 TYPE STRING,
VALUE19 TYPE STRING,
RELEASE_DATE19 TYPE STRING,
VALUE20 TYPE STRING,
RELEASE_DATE20 TYPE STRING,
VALUE21 TYPE STRING,
RELEASE_DATE21 TYPE STRING,
VALUE22 TYPE STRING,
RELEASE_DATE22 TYPE STRING,
VALUE23 TYPE STRING,
RELEASE_DATE23 TYPE STRING,
VALUE24 TYPE STRING,
RELEASE_DATE24 TYPE STRING,
VALUE25 TYPE STRING,
RELEASE_DATE25 TYPE STRING,
STYLE TYPE STRING,
CELLCOLOR_TAB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CAPREV_RESV_ALV_STRU_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_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-DATE sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-BEGTI sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-CAPACITY sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-CAPACITY_UNIT sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-CONV_CAPACITY sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-CONV_CAP_UNIT sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-UNRESERVED sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-UNALLOCATED sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE0 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE1 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE1 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE2 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE2 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE3 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE3 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE4 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE4 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE5 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE5 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE6 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE6 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE7 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE7 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE8 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE8 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE9 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE9 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE10 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE10 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE11 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE11 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE12 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE12 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE13 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE13 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE14 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE14 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE15 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE15 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE16 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE16 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE17 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE17 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE18 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE18 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE19 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE19 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE20 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE20 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE21 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE21 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE22 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE22 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE23 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE23 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE24 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE24 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-VALUE25 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-RELEASE_DATE25 sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-STYLE sy-vline 
WA_/SAPAPO/CAPREV_RESV_ALV_STRU_STR-CELLCOLOR_TAB sy-vline      INTO ld_text SEPARATED BY SPACE.

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