ABAP Select data from SAP table PLAB into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PLAB 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 PLAB. 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 PLAB 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_PLAB TYPE STANDARD TABLE OF PLAB,
      WA_PLAB TYPE PLAB,
      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: <PLAB> TYPE PLAB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PLAB
*  INTO TABLE @DATA(IT_PLAB2).
*--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_PLAB INDEX 1 INTO DATA(WA_PLAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PLAB>-MANDT = 1.
<PLAB>-PLNTY = 1.
<PLAB>-PLNNR = 1.
<PLAB>-PLNAL = 1.
<PLAB>-PLNKN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PLAB-PLNRN, sy-vline,
  WA_PLAB-ALNRN, sy-vline,
  WA_PLAB-KNNRN, sy-vline,
  WA_PLAB-AOBAR, sy-vline,
  WA_PLAB-MIMAX, sy-vline,
  WA_PLAB-ZAEHL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PLAB 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_PLAB 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_PLAB INTO WA_PLAB.


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

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

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

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

*Conversion exit AOBAR, internal->external for field AOBAR
CALL FUNCTION 'CONVERSION_EXIT_AOBAR_OUTPUT'
  EXPORTING
    input =                      WA_PLAB-AOBAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLAB-AOBAR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ZEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PLAB-ZEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLAB-ZEINH.
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_PLAB_STR, 
MANDT TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNKN TYPE STRING,
PLNRN TYPE STRING,
ALNRN TYPE STRING,
KNNRN TYPE STRING,
AOBAR TYPE STRING,
MIMAX TYPE STRING,
ZAEHL TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
AENNR TYPE STRING,
ZEINH TYPE STRING,
DAUER TYPE STRING,
DAUKZ TYPE STRING,
VORNC TYPE STRING,
NCVOR TYPE STRING,
LOEKZ TYPE STRING,
KALID TYPE STRING,
PRZNT TYPE STRING,
PROVG TYPE STRING,
ARBID TYPE STRING,
WERKS TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
DAUERMAX TYPE STRING,
VALID_TO TYPE STRING,
LOEKZ_INHERITED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PLAB_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_PLAB_STR-MANDT sy-vline 
WA_PLAB_STR-PLNTY sy-vline 
WA_PLAB_STR-PLNNR sy-vline 
WA_PLAB_STR-PLNAL sy-vline 
WA_PLAB_STR-PLNKN sy-vline 
WA_PLAB_STR-PLNRN sy-vline 
WA_PLAB_STR-ALNRN sy-vline 
WA_PLAB_STR-KNNRN sy-vline 
WA_PLAB_STR-AOBAR sy-vline 
WA_PLAB_STR-MIMAX sy-vline 
WA_PLAB_STR-ZAEHL sy-vline 
WA_PLAB_STR-DATUV sy-vline 
WA_PLAB_STR-TECHV sy-vline 
WA_PLAB_STR-AENNR sy-vline 
WA_PLAB_STR-ZEINH sy-vline 
WA_PLAB_STR-DAUER sy-vline 
WA_PLAB_STR-DAUKZ sy-vline 
WA_PLAB_STR-VORNC sy-vline 
WA_PLAB_STR-NCVOR sy-vline 
WA_PLAB_STR-LOEKZ sy-vline 
WA_PLAB_STR-KALID sy-vline 
WA_PLAB_STR-PRZNT sy-vline 
WA_PLAB_STR-PROVG sy-vline 
WA_PLAB_STR-ARBID sy-vline 
WA_PLAB_STR-WERKS sy-vline 
WA_PLAB_STR-ANDAT sy-vline 
WA_PLAB_STR-ANNAM sy-vline 
WA_PLAB_STR-AEDAT sy-vline 
WA_PLAB_STR-AENAM sy-vline 
WA_PLAB_STR-DAUERMAX sy-vline 
WA_PLAB_STR-VALID_TO sy-vline 
WA_PLAB_STR-LOEKZ_INHERITED sy-vline      INTO ld_text SEPARATED BY SPACE.

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