ABAP Select data from SAP table ESH_L_MAINTORDER into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_L_MAINTORDER
*  INTO TABLE @DATA(IT_ESH_L_MAINTORDER2).
*--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_ESH_L_MAINTORDER INDEX 1 INTO DATA(WA_ESH_L_MAINTORDER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_L_MAINTORDER>-MANDT = 1.
<ESH_L_MAINTORDER>-MAINTENANCEORDER = 1.
<ESH_L_MAINTORDER>-FUNCTIONALLOCATION = 1.
<ESH_L_MAINTORDER>-EQUIPMENTNAME = 1.
<ESH_L_MAINTORDER>-CONTROLLINGAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_L_MAINTORDER-AUTHORIZATIONGROUPEQ, sy-vline,
  WA_ESH_L_MAINTORDER-AUTHORIZATIONGROUPFL, sy-vline,
  WA_ESH_L_MAINTORDER-WORKCENTER, sy-vline,
  WA_ESH_L_MAINTORDER-OPERATIONSYSTEMCONDITIONTEXT, sy-vline,
  WA_ESH_L_MAINTORDER-MAINTENANCEPLANNERGROUPNAME, sy-vline,
  WA_ESH_L_MAINTORDER-MAINTPRIORITYDESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESH_L_MAINTORDER 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_ESH_L_MAINTORDER 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_ESH_L_MAINTORDER INTO WA_ESH_L_MAINTORDER.


*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 MAINTENANCEORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_MAINTORDER-MAINTENANCEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_MAINTORDER-MAINTENANCEORDER.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field ASSEMBLY
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_MAINTORDER-ASSEMBLY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_MAINTORDER-ASSEMBLY.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field COSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ESH_L_MAINTORDER-COSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESH_L_MAINTORDER-COSTCENTER.
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_ESH_L_MAINTORDER_STR, 
MANDT TYPE STRING,
MAINTENANCEORDER TYPE STRING,
FUNCTIONALLOCATION TYPE STRING,
EQUIPMENTNAME TYPE STRING,
CONTROLLINGAREA TYPE STRING,
AUTHORIZATIONGROUPEQ TYPE STRING,
AUTHORIZATIONGROUPFL TYPE STRING,
WORKCENTER TYPE STRING,
OPERATIONSYSTEMCONDITIONTEXT TYPE STRING,
MAINTENANCEPLANNERGROUPNAME TYPE STRING,
MAINTPRIORITYDESC TYPE STRING,
ORDERTYPENAME TYPE STRING,
MAINTENANCEACTIVITYTYPENAME TYPE STRING,
FUNCNLLOCPRIMARYLABELNAME TYPE STRING,
FUNCTIONALLOCATIONNAME TYPE STRING,
MAINTORDBASICENDDATE TYPE STRING,
MAINTORDBASICSTARTDATE TYPE STRING,
MAINTENANCEORDERDESC TYPE STRING,
MAINTPRIORITYTYPE TYPE STRING,
MAINTENANCEACTIVITYTYPE TYPE STRING,
MAINTENANCEPLAN TYPE STRING,
MAINTENANCEREVISION TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
ASSEMBLY TYPE STRING,
EQUIPMENT TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
MAINTENANCEPROCESSINGPHASE TYPE STRING,
MAINTENANCEPROCESSINGPHASEDESC TYPE STRING,
MAINTPRIORITY TYPE STRING,
OPERATIONSYSTEMCONDITION TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,
LATESTACCEPTABLECOMPLETIONDATE TYPE STRING,
MAINTENANCEPLANT TYPE STRING,
OPERATIONDESCRIPTION TYPE STRING,
COSTCENTER TYPE STRING,
PLANTSECTION TYPE STRING,
MAINTENANCEOBJECTLOCATION TYPE STRING,
ABCINDICATOR TYPE STRING,
ASSETROOM TYPE STRING,
MAINWORKCENTER TYPE STRING,
PLAINLONGTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESH_L_MAINTORDER_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_ESH_L_MAINTORDER_STR-MANDT sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEORDER sy-vline 
WA_ESH_L_MAINTORDER_STR-FUNCTIONALLOCATION sy-vline 
WA_ESH_L_MAINTORDER_STR-EQUIPMENTNAME sy-vline 
WA_ESH_L_MAINTORDER_STR-CONTROLLINGAREA sy-vline 
WA_ESH_L_MAINTORDER_STR-AUTHORIZATIONGROUPEQ sy-vline 
WA_ESH_L_MAINTORDER_STR-AUTHORIZATIONGROUPFL sy-vline 
WA_ESH_L_MAINTORDER_STR-WORKCENTER sy-vline 
WA_ESH_L_MAINTORDER_STR-OPERATIONSYSTEMCONDITIONTEXT sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPLANNERGROUPNAME sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTPRIORITYDESC sy-vline 
WA_ESH_L_MAINTORDER_STR-ORDERTYPENAME sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEACTIVITYTYPENAME sy-vline 
WA_ESH_L_MAINTORDER_STR-FUNCNLLOCPRIMARYLABELNAME sy-vline 
WA_ESH_L_MAINTORDER_STR-FUNCTIONALLOCATIONNAME sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTORDBASICENDDATE sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTORDBASICSTARTDATE sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEORDERDESC sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTPRIORITYTYPE sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEACTIVITYTYPE sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPLAN sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEREVISION sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_ESH_L_MAINTORDER_STR-ASSEMBLY sy-vline 
WA_ESH_L_MAINTORDER_STR-EQUIPMENT sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCENOTIFICATION sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPROCESSINGPHASE sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPROCESSINGPHASEDESC sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTPRIORITY sy-vline 
WA_ESH_L_MAINTORDER_STR-OPERATIONSYSTEMCONDITION sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEORDERTYPE sy-vline 
WA_ESH_L_MAINTORDER_STR-LATESTACCEPTABLECOMPLETIONDATE sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEPLANT sy-vline 
WA_ESH_L_MAINTORDER_STR-OPERATIONDESCRIPTION sy-vline 
WA_ESH_L_MAINTORDER_STR-COSTCENTER sy-vline 
WA_ESH_L_MAINTORDER_STR-PLANTSECTION sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINTENANCEOBJECTLOCATION sy-vline 
WA_ESH_L_MAINTORDER_STR-ABCINDICATOR sy-vline 
WA_ESH_L_MAINTORDER_STR-ASSETROOM sy-vline 
WA_ESH_L_MAINTORDER_STR-MAINWORKCENTER sy-vline 
WA_ESH_L_MAINTORDER_STR-PLAINLONGTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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