ABAP Select data from SAP table PMAINTSEARCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PMAINTSEARCH
*  INTO TABLE @DATA(IT_PMAINTSEARCH2).
*--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_PMAINTSEARCH INDEX 1 INTO DATA(WA_PMAINTSEARCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PMAINTSEARCH>-MANDT = 1.
<PMAINTSEARCH>-MAINTENANCEORDER = 1.
<PMAINTSEARCH>-MAINTPRIORITYTYPE = 1.
<PMAINTSEARCH>-MAINTPRIORITY = 1.
<PMAINTSEARCH>-MAINTENANCEPROCESSINGPHASE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PMAINTSEARCH-MAINTOBJECTLOCACCTASSGMTNMBR, sy-vline,
  WA_PMAINTSEARCH-MAINTENANCENOTIFICATION, sy-vline,
  WA_PMAINTSEARCH-EQUIPMENT, sy-vline,
  WA_PMAINTSEARCH-ASSEMBLY, sy-vline,
  WA_PMAINTSEARCH-SERIALNUMBER, sy-vline,
  WA_PMAINTSEARCH-MAINTENANCEPLANNINGPLANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PMAINTSEARCH 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_PMAINTSEARCH 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_PMAINTSEARCH INTO WA_PMAINTSEARCH.


*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_PMAINTSEARCH-MAINTENANCEORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMAINTSEARCH-MAINTENANCEORDER.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field RESPONSIBLECOSTCENTER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PMAINTSEARCH-RESPONSIBLECOSTCENTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PMAINTSEARCH-RESPONSIBLECOSTCENTER.
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_PMAINTSEARCH_STR, 
MANDT TYPE STRING,
MAINTENANCEORDER TYPE STRING,
MAINTPRIORITYTYPE TYPE STRING,
MAINTPRIORITY TYPE STRING,
MAINTENANCEPROCESSINGPHASE TYPE STRING,
MAINTOBJECTLOCACCTASSGMTNMBR TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
EQUIPMENT TYPE STRING,
ASSEMBLY TYPE STRING,
SERIALNUMBER TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTENANCEPLANNERGROUP TYPE STRING,
MAINTENANCEREVISION TYPE STRING,
MAINTENANCEPLAN TYPE STRING,
MAINTENANCEITEM TYPE STRING,
MAINTENANCEACTIVITYTYPE TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
MAINTORDERREFERENCEDATE TYPE STRING,
MAINTENANCEORDERPLANNINGCODE TYPE STRING,
OPERATIONSYSTEMCONDITION TYPE STRING,
REFERENCEELEMENT TYPE STRING,
MAINTENANCEITEMOBJECTLIST TYPE STRING,
MAINTORDERROUTINGNUMBER TYPE STRING,
BUSINESSAREA TYPE STRING,
MAINTENANCEORDERTYPE TYPE STRING,
MAINTENANCEORDERCATEGORY TYPE STRING,
MAINTENANCEORDERDESC TYPE STRING,
CONTROLLINGAREA TYPE STRING,
RESPONSIBLECOSTCENTER TYPE STRING,
BASICSCHEDULINGTYPE TYPE STRING,
MAINTORDBASICSTARTDATE TYPE STRING,
MAINTORDBASICENDDATE TYPE STRING,
MAINTENANCEORDERINTERNALID TYPE STRING,
MAINTENANCEPLANT TYPE STRING,
CREATEDBYUSER TYPE STRING,
ORDERHASLONGTEXT TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
ADDITIONALDEVICEDATA TYPE STRING,
PLAINLONGTEXT TYPE STRING,
LATESTACCEPTABLECOMPLETIONDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PMAINTSEARCH_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_PMAINTSEARCH_STR-MANDT sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEORDER sy-vline 
WA_PMAINTSEARCH_STR-MAINTPRIORITYTYPE sy-vline 
WA_PMAINTSEARCH_STR-MAINTPRIORITY sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEPROCESSINGPHASE sy-vline 
WA_PMAINTSEARCH_STR-MAINTOBJECTLOCACCTASSGMTNMBR sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCENOTIFICATION sy-vline 
WA_PMAINTSEARCH_STR-EQUIPMENT sy-vline 
WA_PMAINTSEARCH_STR-ASSEMBLY sy-vline 
WA_PMAINTSEARCH_STR-SERIALNUMBER sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEPLANNERGROUP sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEREVISION sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEPLAN sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEITEM sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEACTIVITYTYPE sy-vline 
WA_PMAINTSEARCH_STR-WORKCENTERINTERNALID sy-vline 
WA_PMAINTSEARCH_STR-WORKCENTERTYPECODE sy-vline 
WA_PMAINTSEARCH_STR-MAINTORDERREFERENCEDATE sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEORDERPLANNINGCODE sy-vline 
WA_PMAINTSEARCH_STR-OPERATIONSYSTEMCONDITION sy-vline 
WA_PMAINTSEARCH_STR-REFERENCEELEMENT sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEITEMOBJECTLIST sy-vline 
WA_PMAINTSEARCH_STR-MAINTORDERROUTINGNUMBER sy-vline 
WA_PMAINTSEARCH_STR-BUSINESSAREA sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEORDERTYPE sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEORDERCATEGORY sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEORDERDESC sy-vline 
WA_PMAINTSEARCH_STR-CONTROLLINGAREA sy-vline 
WA_PMAINTSEARCH_STR-RESPONSIBLECOSTCENTER sy-vline 
WA_PMAINTSEARCH_STR-BASICSCHEDULINGTYPE sy-vline 
WA_PMAINTSEARCH_STR-MAINTORDBASICSTARTDATE sy-vline 
WA_PMAINTSEARCH_STR-MAINTORDBASICENDDATE sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEORDERINTERNALID sy-vline 
WA_PMAINTSEARCH_STR-MAINTENANCEPLANT sy-vline 
WA_PMAINTSEARCH_STR-CREATEDBYUSER sy-vline 
WA_PMAINTSEARCH_STR-ORDERHASLONGTEXT sy-vline 
WA_PMAINTSEARCH_STR-LASTCHANGEDATETIME sy-vline 
WA_PMAINTSEARCH_STR-ADDITIONALDEVICEDATA sy-vline 
WA_PMAINTSEARCH_STR-PLAINLONGTEXT sy-vline 
WA_PMAINTSEARCH_STR-LATESTACCEPTABLECOMPLETIONDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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