ABAP Select data from SAP table QUERY_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QUERY_TAB
*  INTO TABLE @DATA(IT_QUERY_TAB2).
*--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_QUERY_TAB INDEX 1 INTO DATA(WA_QUERY_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QUERY_TAB>-VIEWNAME = 1.
<QUERY_TAB>-SCRTEXT_M = 1.
<QUERY_TAB>-INTLEN = 1.
<QUERY_TAB>-INTTYPE = 1.
<QUERY_TAB>-LOWERCASE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QUERY_TAB-POSITION, sy-vline,
  WA_QUERY_TAB-BOOL, sy-vline,
  WA_QUERY_TAB-RELATION, sy-vline,
  WA_QUERY_TAB-BUFFER, sy-vline,
  WA_QUERY_TAB-MARK, sy-vline,
  WA_QUERY_TAB-NEGATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QUERY_TAB 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_QUERY_TAB 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_QUERY_TAB INTO WA_QUERY_TAB.


*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_QUERY_TAB_STR, 
VIEWNAME TYPE STRING,
SCRTEXT_M TYPE STRING,
INTLEN TYPE STRING,
INTTYPE TYPE STRING,
LOWERCASE TYPE STRING,
POSITION TYPE STRING,
BOOL TYPE STRING,
RELATION TYPE STRING,
BUFFER TYPE STRING,
MARK TYPE STRING,
NEGATION TYPE STRING,
OUTPUTLEN TYPE STRING,
CONVEXIT TYPE STRING,
MASK TYPE STRING,
MASKLEN TYPE STRING,
FIELDNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QUERY_TAB_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_QUERY_TAB_STR-VIEWNAME sy-vline 
WA_QUERY_TAB_STR-SCRTEXT_M sy-vline 
WA_QUERY_TAB_STR-INTLEN sy-vline 
WA_QUERY_TAB_STR-INTTYPE sy-vline 
WA_QUERY_TAB_STR-LOWERCASE sy-vline 
WA_QUERY_TAB_STR-POSITION sy-vline 
WA_QUERY_TAB_STR-BOOL sy-vline 
WA_QUERY_TAB_STR-RELATION sy-vline 
WA_QUERY_TAB_STR-BUFFER sy-vline 
WA_QUERY_TAB_STR-MARK sy-vline 
WA_QUERY_TAB_STR-NEGATION sy-vline 
WA_QUERY_TAB_STR-OUTPUTLEN sy-vline 
WA_QUERY_TAB_STR-CONVEXIT sy-vline 
WA_QUERY_TAB_STR-MASK sy-vline 
WA_QUERY_TAB_STR-MASKLEN sy-vline 
WA_QUERY_TAB_STR-FIELDNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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