ABAP Select data from SAP table CCM_PERF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCM_PERF
*  INTO TABLE @DATA(IT_CCM_PERF2).
*--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_CCM_PERF INDEX 1 INTO DATA(WA_CCM_PERF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCM_PERF>-PERFDATE = 1.
<CCM_PERF>-PERFUNIT = 1.
<CCM_PERF>-H00 = 1.
<CCM_PERF>-H01 = 1.
<CCM_PERF>-H02 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCM_PERF-H03, sy-vline,
  WA_CCM_PERF-H04, sy-vline,
  WA_CCM_PERF-H05, sy-vline,
  WA_CCM_PERF-H06, sy-vline,
  WA_CCM_PERF-H07, sy-vline,
  WA_CCM_PERF-H08, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCM_PERF 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_CCM_PERF 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_CCM_PERF INTO WA_CCM_PERF.


*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_CCM_PERF_STR, 
PERFDATE TYPE STRING,
PERFUNIT TYPE STRING,
H00 TYPE STRING,
H01 TYPE STRING,
H02 TYPE STRING,
H03 TYPE STRING,
H04 TYPE STRING,
H05 TYPE STRING,
H06 TYPE STRING,
H07 TYPE STRING,
H08 TYPE STRING,
H09 TYPE STRING,
H10 TYPE STRING,
H11 TYPE STRING,
H12 TYPE STRING,
H13 TYPE STRING,
H14 TYPE STRING,
H15 TYPE STRING,
H16 TYPE STRING,
H17 TYPE STRING,
H18 TYPE STRING,
H19 TYPE STRING,
H20 TYPE STRING,
H21 TYPE STRING,
H22 TYPE STRING,
H23 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCM_PERF_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_CCM_PERF_STR-PERFDATE sy-vline 
WA_CCM_PERF_STR-PERFUNIT sy-vline 
WA_CCM_PERF_STR-H00 sy-vline 
WA_CCM_PERF_STR-H01 sy-vline 
WA_CCM_PERF_STR-H02 sy-vline 
WA_CCM_PERF_STR-H03 sy-vline 
WA_CCM_PERF_STR-H04 sy-vline 
WA_CCM_PERF_STR-H05 sy-vline 
WA_CCM_PERF_STR-H06 sy-vline 
WA_CCM_PERF_STR-H07 sy-vline 
WA_CCM_PERF_STR-H08 sy-vline 
WA_CCM_PERF_STR-H09 sy-vline 
WA_CCM_PERF_STR-H10 sy-vline 
WA_CCM_PERF_STR-H11 sy-vline 
WA_CCM_PERF_STR-H12 sy-vline 
WA_CCM_PERF_STR-H13 sy-vline 
WA_CCM_PERF_STR-H14 sy-vline 
WA_CCM_PERF_STR-H15 sy-vline 
WA_CCM_PERF_STR-H16 sy-vline 
WA_CCM_PERF_STR-H17 sy-vline 
WA_CCM_PERF_STR-H18 sy-vline 
WA_CCM_PERF_STR-H19 sy-vline 
WA_CCM_PERF_STR-H20 sy-vline 
WA_CCM_PERF_STR-H21 sy-vline 
WA_CCM_PERF_STR-H22 sy-vline 
WA_CCM_PERF_STR-H23 sy-vline      INTO ld_text SEPARATED BY SPACE.

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