ABAP Select data from SAP table EHFNDS_MAINT_ORD_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EHFNDS_MAINT_ORD_HEADER
*  INTO TABLE @DATA(IT_EHFNDS_MAINT_ORD_HEADER2).
*--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_EHFNDS_MAINT_ORD_HEADER INDEX 1 INTO DATA(WA_EHFNDS_MAINT_ORD_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EHFNDS_MAINT_ORD_HEADER>-ORDERID = 1.
<EHFNDS_MAINT_ORD_HEADER>-ORDER_TYPE = 1.
<EHFNDS_MAINT_ORD_HEADER>-PLANPLANT = 1.
<EHFNDS_MAINT_ORD_HEADER>-BUS_AREA = 1.
<EHFNDS_MAINT_ORD_HEADER>-MN_WK_CTR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EHFNDS_MAINT_ORD_HEADER-PLANT, sy-vline,
  WA_EHFNDS_MAINT_ORD_HEADER-MN_WKCTR_ID, sy-vline,
  WA_EHFNDS_MAINT_ORD_HEADER-PMACTTYPE, sy-vline,
  WA_EHFNDS_MAINT_ORD_HEADER-PLANGROUP, sy-vline,
  WA_EHFNDS_MAINT_ORD_HEADER-SYSTCOND, sy-vline,
  WA_EHFNDS_MAINT_ORD_HEADER-FUNCT_LOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EHFNDS_MAINT_ORD_HEADER 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_EHFNDS_MAINT_ORD_HEADER 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_EHFNDS_MAINT_ORD_HEADER INTO WA_EHFNDS_MAINT_ORD_HEADER.


*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.

*Conversion exit ALPHA, internal->external for field ORDERID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_MAINT_ORD_HEADER-ORDERID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_MAINT_ORD_HEADER-ORDERID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field FUNCT_LOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_MAINT_ORD_HEADER-FUNCT_LOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_MAINT_ORD_HEADER-FUNCT_LOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUIPMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_MAINT_ORD_HEADER-EQUIPMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_MAINT_ORD_HEADER-EQUIPMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERIALNO
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_EHFNDS_MAINT_ORD_HEADER-SERIALNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EHFNDS_MAINT_ORD_HEADER-SERIALNO.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EHFNDS_MAINT_ORD_HEADER_STR, 
ORDERID TYPE STRING,
ORDER_TYPE TYPE STRING,
PLANPLANT TYPE STRING,
BUS_AREA TYPE STRING,
MN_WK_CTR TYPE STRING,
PLANT TYPE STRING,
MN_WKCTR_ID TYPE STRING,
PMACTTYPE TYPE STRING,
PLANGROUP TYPE STRING,
SYSTCOND TYPE STRING,
FUNCT_LOC TYPE STRING,
EQUIPMENT TYPE STRING,
SERIALNO TYPE STRING,
DEVICEDATA TYPE STRING,
MAINTPLANT TYPE STRING,
LOCATION TYPE STRING,
MAINTROOM TYPE STRING,
PLSECTN TYPE STRING,
LOC_WK_CTR TYPE STRING,
SHORT_TEXT TYPE STRING,
ESTIMATED_COSTS TYPE STRING,
CURRENCY TYPE STRING,
START_DATE TYPE STRING,
FINISH_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EHFNDS_MAINT_ORD_HEADER_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_EHFNDS_MAINT_ORD_HEADER_STR-ORDERID sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-ORDER_TYPE sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-PLANPLANT sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-BUS_AREA sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-MN_WK_CTR sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-PLANT sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-MN_WKCTR_ID sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-PMACTTYPE sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-PLANGROUP sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-SYSTCOND sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-FUNCT_LOC sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-EQUIPMENT sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-SERIALNO sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-DEVICEDATA sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-MAINTPLANT sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-LOCATION sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-MAINTROOM sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-PLSECTN sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-LOC_WK_CTR sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-SHORT_TEXT sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-ESTIMATED_COSTS sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-CURRENCY sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-START_DATE sy-vline 
WA_EHFNDS_MAINT_ORD_HEADER_STR-FINISH_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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