ABAP Select data from SAP table GTY_DETAIL_VMC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GTY_DETAIL_VMC
*  INTO TABLE @DATA(IT_GTY_DETAIL_VMC2).
*--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_GTY_DETAIL_VMC INDEX 1 INTO DATA(WA_GTY_DETAIL_VMC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GTY_DETAIL_VMC>-HANDLE_COUNT = 1.
<GTY_DETAIL_VMC>-CALL_COUNT = 1.
<GTY_DETAIL_VMC>-ELAPTI = 1.
<GTY_DETAIL_VMC>-CPUTI = 1.
<GTY_DETAIL_VMC>-SYS_PURPTI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GTY_DETAIL_VMC-CODE_GENTI, sy-vline,
  WA_GTY_DETAIL_VMC-TRANSF_IO, sy-vline,
  WA_GTY_DETAIL_VMC-J_GC_ELAPTI_L, sy-vline,
  WA_GTY_DETAIL_VMC-J_GC_ELAPTI_S, sy-vline,
  WA_GTY_DETAIL_VMC-J_GC_CPUTI_L, sy-vline,
  WA_GTY_DETAIL_VMC-J_GC_CPUTI_S, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GTY_DETAIL_VMC 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_GTY_DETAIL_VMC 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_GTY_DETAIL_VMC INTO WA_GTY_DETAIL_VMC.


*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_GTY_DETAIL_VMC_STR, 
HANDLE_COUNT TYPE STRING,
CALL_COUNT TYPE STRING,
ELAPTI TYPE STRING,
CPUTI TYPE STRING,
SYS_PURPTI TYPE STRING,
CODE_GENTI TYPE STRING,
TRANSF_IO TYPE STRING,
J_GC_ELAPTI_L TYPE STRING,
J_GC_ELAPTI_S TYPE STRING,
J_GC_CPUTI_L TYPE STRING,
J_GC_CPUTI_S TYPE STRING,
J_GC_COUNT_L TYPE STRING,
J_GC_COUNT_S TYPE STRING,
J_ALLOC_MEM_L TYPE STRING,
J_ALLOC_MEM_S TYPE STRING,
J_FREED_MEM_L TYPE STRING,
J_FREED_MEM_S TYPE STRING,
J_PROMOT_MEM TYPE STRING,
O_ALLOC_MEM_MISC TYPE STRING,
O_ALLOC_MEM_CODE TYPE STRING,
O_ALLOC_MEM_CLS TYPE STRING,
O_FREED_MEM_MISC TYPE STRING,
O_FREED_MEM_CODE TYPE STRING,
O_FREED_MEM_CLS TYPE STRING,
O_PROFILING_MEM TYPE STRING,
CPUTI_GC TYPE STRING,
COUNT_GC TYPE STRING,
ALLOC_MEM_JAVA TYPE STRING,
FREED_MEM_JAVA TYPE STRING,
ELAPTI_GC TYPE STRING,
ELAPTI_OTHER TYPE STRING,
TBL_CLASSLOAD TYPE STRING,
TBL_CODEGEN TYPE STRING,
TBL_FRAMEWORK TYPE STRING,
TBL_IO TYPE STRING,
TBL_JAVAMEM TYPE STRING,
TBL_MISC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GTY_DETAIL_VMC_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_GTY_DETAIL_VMC_STR-HANDLE_COUNT sy-vline 
WA_GTY_DETAIL_VMC_STR-CALL_COUNT sy-vline 
WA_GTY_DETAIL_VMC_STR-ELAPTI sy-vline 
WA_GTY_DETAIL_VMC_STR-CPUTI sy-vline 
WA_GTY_DETAIL_VMC_STR-SYS_PURPTI sy-vline 
WA_GTY_DETAIL_VMC_STR-CODE_GENTI sy-vline 
WA_GTY_DETAIL_VMC_STR-TRANSF_IO sy-vline 
WA_GTY_DETAIL_VMC_STR-J_GC_ELAPTI_L sy-vline 
WA_GTY_DETAIL_VMC_STR-J_GC_ELAPTI_S sy-vline 
WA_GTY_DETAIL_VMC_STR-J_GC_CPUTI_L sy-vline 
WA_GTY_DETAIL_VMC_STR-J_GC_CPUTI_S sy-vline 
WA_GTY_DETAIL_VMC_STR-J_GC_COUNT_L sy-vline 
WA_GTY_DETAIL_VMC_STR-J_GC_COUNT_S sy-vline 
WA_GTY_DETAIL_VMC_STR-J_ALLOC_MEM_L sy-vline 
WA_GTY_DETAIL_VMC_STR-J_ALLOC_MEM_S sy-vline 
WA_GTY_DETAIL_VMC_STR-J_FREED_MEM_L sy-vline 
WA_GTY_DETAIL_VMC_STR-J_FREED_MEM_S sy-vline 
WA_GTY_DETAIL_VMC_STR-J_PROMOT_MEM sy-vline 
WA_GTY_DETAIL_VMC_STR-O_ALLOC_MEM_MISC sy-vline 
WA_GTY_DETAIL_VMC_STR-O_ALLOC_MEM_CODE sy-vline 
WA_GTY_DETAIL_VMC_STR-O_ALLOC_MEM_CLS sy-vline 
WA_GTY_DETAIL_VMC_STR-O_FREED_MEM_MISC sy-vline 
WA_GTY_DETAIL_VMC_STR-O_FREED_MEM_CODE sy-vline 
WA_GTY_DETAIL_VMC_STR-O_FREED_MEM_CLS sy-vline 
WA_GTY_DETAIL_VMC_STR-O_PROFILING_MEM sy-vline 
WA_GTY_DETAIL_VMC_STR-CPUTI_GC sy-vline 
WA_GTY_DETAIL_VMC_STR-COUNT_GC sy-vline 
WA_GTY_DETAIL_VMC_STR-ALLOC_MEM_JAVA sy-vline 
WA_GTY_DETAIL_VMC_STR-FREED_MEM_JAVA sy-vline 
WA_GTY_DETAIL_VMC_STR-ELAPTI_GC sy-vline 
WA_GTY_DETAIL_VMC_STR-ELAPTI_OTHER sy-vline 
WA_GTY_DETAIL_VMC_STR-TBL_CLASSLOAD sy-vline 
WA_GTY_DETAIL_VMC_STR-TBL_CODEGEN sy-vline 
WA_GTY_DETAIL_VMC_STR-TBL_FRAMEWORK sy-vline 
WA_GTY_DETAIL_VMC_STR-TBL_IO sy-vline 
WA_GTY_DETAIL_VMC_STR-TBL_JAVAMEM sy-vline 
WA_GTY_DETAIL_VMC_STR-TBL_MISC sy-vline      INTO ld_text SEPARATED BY SPACE.

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