ABAP Select data from SAP table Q1042 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q1042 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 Q1042. 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 Q1042 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_Q1042 TYPE STANDARD TABLE OF Q1042,
      WA_Q1042 TYPE Q1042,
      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: <Q1042> TYPE Q1042.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q1042.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q1042
  INTO TABLE IT_Q1042.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q1042
*  INTO TABLE @DATA(IT_Q10422).
*--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_Q1042 INDEX 1 INTO DATA(WA_Q10422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q1042 ASSIGNING <Q1042>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q1042>-ACLAS_TEXT = 1.
<Q1042>-TOTAL = 1.
<Q1042>-DAYS = 1.
<Q1042>-HOURS = 1.
<Q1042>-DURCH = 1.

ENDLOOP.

LOOP AT IT_Q1042 INTO WA_Q1042.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q1042-BEGINNTAG, sy-vline,
  WA_Q1042-REFAK_TEXT, sy-vline,
  WA_Q1042-REFRQ_TEXT, sy-vline,
  WA_Q1042-REFRQ_TITL, sy-vline,
  WA_Q1042-RDAY_TEXT, sy-vline,
  WA_Q1042-MONATTAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q1042 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_Q1042 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_Q1042 INTO WA_Q1042.


*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_Q1042_STR, 
ACLAS_TEXT TYPE STRING,
TOTAL TYPE STRING,
DAYS TYPE STRING,
HOURS TYPE STRING,
DURCH TYPE STRING,
BEGINNTAG TYPE STRING,
REFAK_TEXT TYPE STRING,
REFRQ_TEXT TYPE STRING,
REFRQ_TITL TYPE STRING,
RDAY_TEXT TYPE STRING,
MONATTAG TYPE STRING,
LINE2 TYPE STRING,
TAGNR TYPE STRING,
BENABL TYPE STRING,
AMUSTER TYPE STRING,
NSCHED TYPE STRING,
MONDD TYPE STRING,
TUEDY TYPE STRING,
WEDDY TYPE STRING,
THUDY TYPE STRING,
FRIDY TYPE STRING,
SATDY TYPE STRING,
SUNDY TYPE STRING,
NODEF TYPE STRING,
RDAY1 TYPE STRING,
RDAY2 TYPE STRING,
RDAY3 TYPE STRING,
RDAYL TYPE STRING,
RFREI TYPE STRING,
EINTERM TYPE STRING,
MEHRTERM TYPE STRING,
WOCHE TYPE STRING,
MONAT TYPE STRING,
BGDAY TYPE STRING,
MONBS TYPE STRING,
REANZ TYPE STRING,
RABST TYPE STRING,
MFRAM TYPE STRING,
IFRAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q1042_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_Q1042_STR-ACLAS_TEXT sy-vline 
WA_Q1042_STR-TOTAL sy-vline 
WA_Q1042_STR-DAYS sy-vline 
WA_Q1042_STR-HOURS sy-vline 
WA_Q1042_STR-DURCH sy-vline 
WA_Q1042_STR-BEGINNTAG sy-vline 
WA_Q1042_STR-REFAK_TEXT sy-vline 
WA_Q1042_STR-REFRQ_TEXT sy-vline 
WA_Q1042_STR-REFRQ_TITL sy-vline 
WA_Q1042_STR-RDAY_TEXT sy-vline 
WA_Q1042_STR-MONATTAG sy-vline 
WA_Q1042_STR-LINE2 sy-vline 
WA_Q1042_STR-TAGNR sy-vline 
WA_Q1042_STR-BENABL sy-vline 
WA_Q1042_STR-AMUSTER sy-vline 
WA_Q1042_STR-NSCHED sy-vline 
WA_Q1042_STR-MONDD sy-vline 
WA_Q1042_STR-TUEDY sy-vline 
WA_Q1042_STR-WEDDY sy-vline 
WA_Q1042_STR-THUDY sy-vline 
WA_Q1042_STR-FRIDY sy-vline 
WA_Q1042_STR-SATDY sy-vline 
WA_Q1042_STR-SUNDY sy-vline 
WA_Q1042_STR-NODEF sy-vline 
WA_Q1042_STR-RDAY1 sy-vline 
WA_Q1042_STR-RDAY2 sy-vline 
WA_Q1042_STR-RDAY3 sy-vline 
WA_Q1042_STR-RDAYL sy-vline 
WA_Q1042_STR-RFREI sy-vline 
WA_Q1042_STR-EINTERM sy-vline 
WA_Q1042_STR-MEHRTERM sy-vline 
WA_Q1042_STR-WOCHE sy-vline 
WA_Q1042_STR-MONAT sy-vline 
WA_Q1042_STR-BGDAY sy-vline 
WA_Q1042_STR-MONBS sy-vline 
WA_Q1042_STR-REANZ sy-vline 
WA_Q1042_STR-RABST sy-vline 
WA_Q1042_STR-MFRAM sy-vline 
WA_Q1042_STR-IFRAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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