ABAP Select data from SAP table FILT_HEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FILT_HEAD
*  INTO TABLE @DATA(IT_FILT_HEAD2).
*--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_FILT_HEAD INDEX 1 INTO DATA(WA_FILT_HEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FILT_HEAD>-FILTER_GUID = 1.
<FILT_HEAD>-FILTER_NAME = 1.
<FILT_HEAD>-USER_ID = 1.
<FILT_HEAD>-PROFIL_ID = 1.
<FILT_HEAD>-CONTEXT_OTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FILT_HEAD-CONTEXT_GUID, sy-vline,
  WA_FILT_HEAD-FILTER_ACCESS, sy-vline,
  WA_FILT_HEAD-ECN_ACTIVE, sy-vline,
  WA_FILT_HEAD-CONCEPT_ACTIVE, sy-vline,
  WA_FILT_HEAD-FILTER_ACTIVE, sy-vline,
  WA_FILT_HEAD-ECN_DET_ACTIVE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FILT_HEAD 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_FILT_HEAD 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_FILT_HEAD INTO WA_FILT_HEAD.


*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_FILT_HEAD_STR, 
FILTER_GUID TYPE STRING,
FILTER_NAME TYPE STRING,
USER_ID TYPE STRING,
PROFIL_ID TYPE STRING,
CONTEXT_OTYPE TYPE STRING,
CONTEXT_GUID TYPE STRING,
FILTER_ACCESS TYPE STRING,
ECN_ACTIVE TYPE STRING,
CONCEPT_ACTIVE TYPE STRING,
FILTER_ACTIVE TYPE STRING,
ECN_DET_ACTIVE TYPE STRING,
ATTR_MODE TYPE STRING,
EXPL_GUID TYPE STRING,
TECHS TYPE STRING,
CUOBJ TYPE STRING,
PPE_USE TYPE STRING,
LOCID TYPE STRING,
CMPID TYPE STRING,
PPEGUID TYPE STRING,
PPENAME TYPE STRING,
CLINT TYPE STRING,
MULTI_LEVEL_CONF TYPE STRING,
MULTI_LEVEL_ECM TYPE STRING,
ECM_ACTIVE TYPE STRING,
PRODVER_ACTIVE TYPE STRING,
CONF_DET_ACTIVE TYPE STRING,
AEFRK TYPE STRING,
AEFRP TYPE STRING,
AEFRF TYPE STRING,
AEFRS TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
LASTNCHSTAT TYPE STRING,
CHSTAT_DET TYPE STRING,
DISP_NVALECM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FILT_HEAD_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_FILT_HEAD_STR-FILTER_GUID sy-vline 
WA_FILT_HEAD_STR-FILTER_NAME sy-vline 
WA_FILT_HEAD_STR-USER_ID sy-vline 
WA_FILT_HEAD_STR-PROFIL_ID sy-vline 
WA_FILT_HEAD_STR-CONTEXT_OTYPE sy-vline 
WA_FILT_HEAD_STR-CONTEXT_GUID sy-vline 
WA_FILT_HEAD_STR-FILTER_ACCESS sy-vline 
WA_FILT_HEAD_STR-ECN_ACTIVE sy-vline 
WA_FILT_HEAD_STR-CONCEPT_ACTIVE sy-vline 
WA_FILT_HEAD_STR-FILTER_ACTIVE sy-vline 
WA_FILT_HEAD_STR-ECN_DET_ACTIVE sy-vline 
WA_FILT_HEAD_STR-ATTR_MODE sy-vline 
WA_FILT_HEAD_STR-EXPL_GUID sy-vline 
WA_FILT_HEAD_STR-TECHS sy-vline 
WA_FILT_HEAD_STR-CUOBJ sy-vline 
WA_FILT_HEAD_STR-PPE_USE sy-vline 
WA_FILT_HEAD_STR-LOCID sy-vline 
WA_FILT_HEAD_STR-CMPID sy-vline 
WA_FILT_HEAD_STR-PPEGUID sy-vline 
WA_FILT_HEAD_STR-PPENAME sy-vline 
WA_FILT_HEAD_STR-CLINT sy-vline 
WA_FILT_HEAD_STR-MULTI_LEVEL_CONF sy-vline 
WA_FILT_HEAD_STR-MULTI_LEVEL_ECM sy-vline 
WA_FILT_HEAD_STR-ECM_ACTIVE sy-vline 
WA_FILT_HEAD_STR-PRODVER_ACTIVE sy-vline 
WA_FILT_HEAD_STR-CONF_DET_ACTIVE sy-vline 
WA_FILT_HEAD_STR-AEFRK sy-vline 
WA_FILT_HEAD_STR-AEFRP sy-vline 
WA_FILT_HEAD_STR-AEFRF sy-vline 
WA_FILT_HEAD_STR-AEFRS sy-vline 
WA_FILT_HEAD_STR-DATE_FROM sy-vline 
WA_FILT_HEAD_STR-DATE_TO sy-vline 
WA_FILT_HEAD_STR-LASTNCHSTAT sy-vline 
WA_FILT_HEAD_STR-CHSTAT_DET sy-vline 
WA_FILT_HEAD_STR-DISP_NVALECM sy-vline      INTO ld_text SEPARATED BY SPACE.

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