ABAP Select data from SAP table OIBQCIMOLCOMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIBQCIMOLCOMP
*  INTO TABLE @DATA(IT_OIBQCIMOLCOMP2).
*--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_OIBQCIMOLCOMP INDEX 1 INTO DATA(WA_OIBQCIMOLCOMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIBQCIMOLCOMP>-CH4RATIO = 1.
<OIBQCIMOLCOMP>-N2RATIO = 1.
<OIBQCIMOLCOMP>-CO2RATIO = 1.
<OIBQCIMOLCOMP>-C2H6RATIO = 1.
<OIBQCIMOLCOMP>-C3H8RATIO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIBQCIMOLCOMP-H2ORATIO, sy-vline,
  WA_OIBQCIMOLCOMP-H2SRATIO, sy-vline,
  WA_OIBQCIMOLCOMP-H2RATIO, sy-vline,
  WA_OIBQCIMOLCOMP-CORATIO, sy-vline,
  WA_OIBQCIMOLCOMP-O2RATIO, sy-vline,
  WA_OIBQCIMOLCOMP-ISOC4H10RATIO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIBQCIMOLCOMP 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_OIBQCIMOLCOMP 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_OIBQCIMOLCOMP INTO WA_OIBQCIMOLCOMP.


*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 GASCOMPRATEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIBQCIMOLCOMP-GASCOMPRATEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIBQCIMOLCOMP-GASCOMPRATEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MOLDENEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIBQCIMOLCOMP-MOLDENEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIBQCIMOLCOMP-MOLDENEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MOLWEIGHTEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIBQCIMOLCOMP-MOLWEIGHTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIBQCIMOLCOMP-MOLWEIGHTEH.
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_OIBQCIMOLCOMP_STR, 
CH4RATIO TYPE STRING,
N2RATIO TYPE STRING,
CO2RATIO TYPE STRING,
C2H6RATIO TYPE STRING,
C3H8RATIO TYPE STRING,
H2ORATIO TYPE STRING,
H2SRATIO TYPE STRING,
H2RATIO TYPE STRING,
CORATIO TYPE STRING,
O2RATIO TYPE STRING,
ISOC4H10RATIO TYPE STRING,
NC4H10RATIO TYPE STRING,
ISOC5H12RATIO TYPE STRING,
NC5H12RATIO TYPE STRING,
C6H14RATIO TYPE STRING,
C7H16RATIO TYPE STRING,
C8H18RATIO TYPE STRING,
C9H20RATIO TYPE STRING,
C10H22RATIO TYPE STRING,
HERATIO TYPE STRING,
ARRATIO TYPE STRING,
GASCOMPRATEH TYPE STRING,
MOLDEN TYPE STRING,
MOLDENEH TYPE STRING,
MOLWEIGHT TYPE STRING,
HYDROCARBMOLFRAC TYPE STRING,
MOLWEIGHTEH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIBQCIMOLCOMP_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_OIBQCIMOLCOMP_STR-CH4RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-N2RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-CO2RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C2H6RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C3H8RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-H2ORATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-H2SRATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-H2RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-CORATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-O2RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-ISOC4H10RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-NC4H10RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-ISOC5H12RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-NC5H12RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C6H14RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C7H16RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C8H18RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C9H20RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-C10H22RATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-HERATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-ARRATIO sy-vline 
WA_OIBQCIMOLCOMP_STR-GASCOMPRATEH sy-vline 
WA_OIBQCIMOLCOMP_STR-MOLDEN sy-vline 
WA_OIBQCIMOLCOMP_STR-MOLDENEH sy-vline 
WA_OIBQCIMOLCOMP_STR-MOLWEIGHT sy-vline 
WA_OIBQCIMOLCOMP_STR-HYDROCARBMOLFRAC sy-vline 
WA_OIBQCIMOLCOMP_STR-MOLWEIGHTEH sy-vline      INTO ld_text SEPARATED BY SPACE.

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