ABAP Select data from SAP table DB4INDEX_HIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB4INDEX_HIST 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 DB4INDEX_HIST. 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 DB4INDEX_HIST 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_DB4INDEX_HIST TYPE STANDARD TABLE OF DB4INDEX_HIST,
      WA_DB4INDEX_HIST TYPE DB4INDEX_HIST,
      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: <DB4INDEX_HIST> TYPE DB4INDEX_HIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB4INDEX_HIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB4INDEX_HIST
  INTO TABLE IT_DB4INDEX_HIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB4INDEX_HIST
*  INTO TABLE @DATA(IT_DB4INDEX_HIST2).
*--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_DB4INDEX_HIST INDEX 1 INTO DATA(WA_DB4INDEX_HIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB4INDEX_HIST ASSIGNING <DB4INDEX_HIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB4INDEX_HIST>-DBHOST = 1.
<DB4INDEX_HIST>-SCHEMANAME = 1.
<DB4INDEX_HIST>-INDNAME = 1.
<DB4INDEX_HIST>-ANDAT = 1.
<DB4INDEX_HIST>-INDNAME_LONG = 1.

ENDLOOP.

LOOP AT IT_DB4INDEX_HIST INTO WA_DB4INDEX_HIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB4INDEX_HIST-VWTYP, sy-vline,
  WA_DB4INDEX_HIST-INDSIZE, sy-vline,
  WA_DB4INDEX_HIST-CRTDATE, sy-vline,
  WA_DB4INDEX_HIST-CRTTIME, sy-vline,
  WA_DB4INDEX_HIST-SAVDATE, sy-vline,
  WA_DB4INDEX_HIST-SAVTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB4INDEX_HIST 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_DB4INDEX_HIST 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_DB4INDEX_HIST INTO WA_DB4INDEX_HIST.


*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_DB4INDEX_HIST_STR, 
DBHOST TYPE STRING,
SCHEMANAME TYPE STRING,
INDNAME TYPE STRING,
ANDAT TYPE STRING,
INDNAME_LONG TYPE STRING,
VWTYP TYPE STRING,
INDSIZE TYPE STRING,
CRTDATE TYPE STRING,
CRTTIME TYPE STRING,
SAVDATE TYPE STRING,
SAVTIME TYPE STRING,
RSTDATE TYPE STRING,
RSTIME TYPE STRING,
INDTABLE TYPE STRING,
INDTABLE_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB4INDEX_HIST_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_DB4INDEX_HIST_STR-DBHOST sy-vline 
WA_DB4INDEX_HIST_STR-SCHEMANAME sy-vline 
WA_DB4INDEX_HIST_STR-INDNAME sy-vline 
WA_DB4INDEX_HIST_STR-ANDAT sy-vline 
WA_DB4INDEX_HIST_STR-INDNAME_LONG sy-vline 
WA_DB4INDEX_HIST_STR-VWTYP sy-vline 
WA_DB4INDEX_HIST_STR-INDSIZE sy-vline 
WA_DB4INDEX_HIST_STR-CRTDATE sy-vline 
WA_DB4INDEX_HIST_STR-CRTTIME sy-vline 
WA_DB4INDEX_HIST_STR-SAVDATE sy-vline 
WA_DB4INDEX_HIST_STR-SAVTIME sy-vline 
WA_DB4INDEX_HIST_STR-RSTDATE sy-vline 
WA_DB4INDEX_HIST_STR-RSTIME sy-vline 
WA_DB4INDEX_HIST_STR-INDTABLE sy-vline 
WA_DB4INDEX_HIST_STR-INDTABLE_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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