ABAP Select data from SAP table IQICATDB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IQICATDB
*  INTO TABLE @DATA(IT_IQICATDB2).
*--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_IQICATDB INDEX 1 INTO DATA(WA_IQICATDB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IQICATDB>-ISNAME = 1.
<IQICATDB>-OLDNAME = 1.
<IQICATDB>-OLDWS = 1.
<IQICATDB>-ITYPE = 1.
<IQICATDB>-TAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IQICATDB-LDB, sy-vline,
  WA_IQICATDB-OLDIS, sy-vline,
  WA_IQICATDB-OLDDEVC, sy-vline,
  WA_IQICATDB-AUTHOR, sy-vline,
  WA_IQICATDB-CRDATE, sy-vline,
  WA_IQICATDB-CRTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IQICATDB 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_IQICATDB 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_IQICATDB INTO WA_IQICATDB.


*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_IQICATDB_STR, 
ISNAME TYPE STRING,
OLDNAME TYPE STRING,
OLDWS TYPE STRING,
ITYPE TYPE STRING,
TAB TYPE STRING,
LDB TYPE STRING,
OLDIS TYPE STRING,
OLDDEVC TYPE STRING,
AUTHOR TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHANGEDBY TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,
NO_TEXTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IQICATDB_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_IQICATDB_STR-ISNAME sy-vline 
WA_IQICATDB_STR-OLDNAME sy-vline 
WA_IQICATDB_STR-OLDWS sy-vline 
WA_IQICATDB_STR-ITYPE sy-vline 
WA_IQICATDB_STR-TAB sy-vline 
WA_IQICATDB_STR-LDB sy-vline 
WA_IQICATDB_STR-OLDIS sy-vline 
WA_IQICATDB_STR-OLDDEVC sy-vline 
WA_IQICATDB_STR-AUTHOR sy-vline 
WA_IQICATDB_STR-CRDATE sy-vline 
WA_IQICATDB_STR-CRTIME sy-vline 
WA_IQICATDB_STR-CHANGEDBY sy-vline 
WA_IQICATDB_STR-CHDATE sy-vline 
WA_IQICATDB_STR-CHTIME sy-vline 
WA_IQICATDB_STR-NO_TEXTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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