ABAP Select data from SAP table Q556C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q556C 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 Q556C. 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 Q556C 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_Q556C TYPE STANDARD TABLE OF Q556C,
      WA_Q556C TYPE Q556C,
      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: <Q556C> TYPE Q556C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q556C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q556C
  INTO TABLE IT_Q556C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q556C
*  INTO TABLE @DATA(IT_Q556C2).
*--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_Q556C INDEX 1 INTO DATA(WA_Q556C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q556C ASSIGNING <Q556C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q556C>-WDAY1 = 1.
<Q556C>-WDAY2 = 1.
<Q556C>-WDAY3 = 1.
<Q556C>-WDAY4 = 1.
<Q556C>-WDAY5 = 1.

ENDLOOP.

LOOP AT IT_Q556C INTO WA_Q556C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q556C-WDAY6, sy-vline,
  WA_Q556C-WDAY7, sy-vline,
  WA_Q556C-HOCL0, sy-vline,
  WA_Q556C-HOCL1, sy-vline,
  WA_Q556C-HOCL2, sy-vline,
  WA_Q556C-HOCL3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q556C 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_Q556C 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_Q556C INTO WA_Q556C.


*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_Q556C_STR, 
WDAY1 TYPE STRING,
WDAY2 TYPE STRING,
WDAY3 TYPE STRING,
WDAY4 TYPE STRING,
WDAY5 TYPE STRING,
WDAY6 TYPE STRING,
WDAY7 TYPE STRING,
HOCL0 TYPE STRING,
HOCL1 TYPE STRING,
HOCL2 TYPE STRING,
HOCL3 TYPE STRING,
HOCL4 TYPE STRING,
HOCL5 TYPE STRING,
HOCL6 TYPE STRING,
HOCL7 TYPE STRING,
HOCL8 TYPE STRING,
HOCL9 TYPE STRING,
DYTP0 TYPE STRING,
DYTP1 TYPE STRING,
DYTP2 TYPE STRING,
DYTP3 TYPE STRING,
DYTP4 TYPE STRING,
DYTP5 TYPE STRING,
DYTP6 TYPE STRING,
DYTP7 TYPE STRING,
DYTP8 TYPE STRING,
DYTP9 TYPE STRING,
PWCL0 TYPE STRING,
PWCL1 TYPE STRING,
PWCL2 TYPE STRING,
PWCL3 TYPE STRING,
PWCL4 TYPE STRING,
PWCL5 TYPE STRING,
PWCL6 TYPE STRING,
PWCL7 TYPE STRING,
PWCL8 TYPE STRING,
PWCL9 TYPE STRING,
DWCL0 TYPE STRING,
DWCL1 TYPE STRING,
DWCL2 TYPE STRING,
DWCL3 TYPE STRING,
DWCL4 TYPE STRING,
DWCL5 TYPE STRING,
DWCL6 TYPE STRING,
DWCL7 TYPE STRING,
DWCL8 TYPE STRING,
DWCL9 TYPE STRING,
MRSHR_MUL TYPE STRING,
MRSHR_RND TYPE STRING,
MRSDY_MUL TYPE STRING,
MRSDY_RND TYPE STRING,
ADFRL_DUR TYPE STRING,
ADFRL_ALL TYPE STRING,
PWHRS_EQZ TYPE STRING,
PWHRS_GTZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q556C_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_Q556C_STR-WDAY1 sy-vline 
WA_Q556C_STR-WDAY2 sy-vline 
WA_Q556C_STR-WDAY3 sy-vline 
WA_Q556C_STR-WDAY4 sy-vline 
WA_Q556C_STR-WDAY5 sy-vline 
WA_Q556C_STR-WDAY6 sy-vline 
WA_Q556C_STR-WDAY7 sy-vline 
WA_Q556C_STR-HOCL0 sy-vline 
WA_Q556C_STR-HOCL1 sy-vline 
WA_Q556C_STR-HOCL2 sy-vline 
WA_Q556C_STR-HOCL3 sy-vline 
WA_Q556C_STR-HOCL4 sy-vline 
WA_Q556C_STR-HOCL5 sy-vline 
WA_Q556C_STR-HOCL6 sy-vline 
WA_Q556C_STR-HOCL7 sy-vline 
WA_Q556C_STR-HOCL8 sy-vline 
WA_Q556C_STR-HOCL9 sy-vline 
WA_Q556C_STR-DYTP0 sy-vline 
WA_Q556C_STR-DYTP1 sy-vline 
WA_Q556C_STR-DYTP2 sy-vline 
WA_Q556C_STR-DYTP3 sy-vline 
WA_Q556C_STR-DYTP4 sy-vline 
WA_Q556C_STR-DYTP5 sy-vline 
WA_Q556C_STR-DYTP6 sy-vline 
WA_Q556C_STR-DYTP7 sy-vline 
WA_Q556C_STR-DYTP8 sy-vline 
WA_Q556C_STR-DYTP9 sy-vline 
WA_Q556C_STR-PWCL0 sy-vline 
WA_Q556C_STR-PWCL1 sy-vline 
WA_Q556C_STR-PWCL2 sy-vline 
WA_Q556C_STR-PWCL3 sy-vline 
WA_Q556C_STR-PWCL4 sy-vline 
WA_Q556C_STR-PWCL5 sy-vline 
WA_Q556C_STR-PWCL6 sy-vline 
WA_Q556C_STR-PWCL7 sy-vline 
WA_Q556C_STR-PWCL8 sy-vline 
WA_Q556C_STR-PWCL9 sy-vline 
WA_Q556C_STR-DWCL0 sy-vline 
WA_Q556C_STR-DWCL1 sy-vline 
WA_Q556C_STR-DWCL2 sy-vline 
WA_Q556C_STR-DWCL3 sy-vline 
WA_Q556C_STR-DWCL4 sy-vline 
WA_Q556C_STR-DWCL5 sy-vline 
WA_Q556C_STR-DWCL6 sy-vline 
WA_Q556C_STR-DWCL7 sy-vline 
WA_Q556C_STR-DWCL8 sy-vline 
WA_Q556C_STR-DWCL9 sy-vline 
WA_Q556C_STR-MRSHR_MUL sy-vline 
WA_Q556C_STR-MRSHR_RND sy-vline 
WA_Q556C_STR-MRSDY_MUL sy-vline 
WA_Q556C_STR-MRSDY_RND sy-vline 
WA_Q556C_STR-ADFRL_DUR sy-vline 
WA_Q556C_STR-ADFRL_ALL sy-vline 
WA_Q556C_STR-PWHRS_EQZ sy-vline 
WA_Q556C_STR-PWHRS_GTZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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