ABAP Select data from SAP table Q0146INS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q0146INS 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 Q0146INS. 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 Q0146INS 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_Q0146INS TYPE STANDARD TABLE OF Q0146INS,
      WA_Q0146INS TYPE Q0146INS,
      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: <Q0146INS> TYPE Q0146INS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q0146INS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q0146INS
  INTO TABLE IT_Q0146INS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q0146INS
*  INTO TABLE @DATA(IT_Q0146INS2).
*--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_Q0146INS INDEX 1 INTO DATA(WA_Q0146INS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q0146INS ASSIGNING <Q0146INS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q0146INS>-FLAG = 1.
<Q0146INS>-INSTY = 1.
<Q0146INS>-INSCC = 1.
<Q0146INS>-INSCT = 1.
<Q0146INS>-INCT2 = 1.

ENDLOOP.

LOOP AT IT_Q0146INS INTO WA_Q0146INS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q0146INS-INSTT, sy-vline,
  WA_Q0146INS-INSPR, sy-vline,
  WA_Q0146INS-ICNAM, sy-vline,
  WA_Q0146INS-IFWOD, sy-vline,
  WA_Q0146INS-WAERS, sy-vline,
  WA_Q0146INS-CTRTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q0146INS 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_Q0146INS 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_Q0146INS INTO WA_Q0146INS.


*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_Q0146INS_STR, 
FLAG TYPE STRING,
INSTY TYPE STRING,
INSCC TYPE STRING,
INSCT TYPE STRING,
INCT2 TYPE STRING,
INSTT TYPE STRING,
INSPR TYPE STRING,
ICNAM TYPE STRING,
IFWOD TYPE STRING,
WAERS TYPE STRING,
CTRTP TYPE STRING,
COFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q0146INS_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_Q0146INS_STR-FLAG sy-vline 
WA_Q0146INS_STR-INSTY sy-vline 
WA_Q0146INS_STR-INSCC sy-vline 
WA_Q0146INS_STR-INSCT sy-vline 
WA_Q0146INS_STR-INCT2 sy-vline 
WA_Q0146INS_STR-INSTT sy-vline 
WA_Q0146INS_STR-INSPR sy-vline 
WA_Q0146INS_STR-ICNAM sy-vline 
WA_Q0146INS_STR-IFWOD sy-vline 
WA_Q0146INS_STR-WAERS sy-vline 
WA_Q0146INS_STR-CTRTP sy-vline 
WA_Q0146INS_STR-COFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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