ABAP Select data from SAP table PACKLABA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PACKLABA
*  INTO TABLE @DATA(IT_PACKLABA2).
*--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_PACKLABA INDEX 1 INTO DATA(WA_PACKLABA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PACKLABA>-PACKUNIT = 1.
<PACKLABA>-CUSTOMER = 1.
<PACKLABA>-CUSTADDR = 1.
<PACKLABA>-CUSTCTRY = 1.
<PACKLABA>-CUSTULPT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PACKLABA-CUSTRCPT, sy-vline,
  WA_PACKLABA-CUSTCOID, sy-vline,
  WA_PACKLABA-SHPPOINT, sy-vline,
  WA_PACKLABA-SHPPADDR, sy-vline,
  WA_PACKLABA-DELIVERY, sy-vline,
  WA_PACKLABA-DELIEXID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PACKLABA 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_PACKLABA 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_PACKLABA INTO WA_PACKLABA.


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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field UNITMEAS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PACKLABA-UNITMEAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PACKLABA-UNITMEAS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UTWEIGHT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PACKLABA-UTWEIGHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PACKLABA-UTWEIGHT.
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_PACKLABA_STR, 
PACKUNIT TYPE STRING,
CUSTOMER TYPE STRING,
CUSTADDR TYPE STRING,
CUSTCTRY TYPE STRING,
CUSTULPT TYPE STRING,
CUSTRCPT TYPE STRING,
CUSTCOID TYPE STRING,
SHPPOINT TYPE STRING,
SHPPADDR TYPE STRING,
DELIVERY TYPE STRING,
DELIEXID TYPE STRING,
SHIPMENT TYPE STRING,
PACKMATR TYPE STRING,
PACKMATC TYPE STRING,
QUANTITY TYPE STRING,
UNITMEAS TYPE STRING,
MATERIAL TYPE STRING,
MATRCUST TYPE STRING,
MATBATCH TYPE STRING,
MATENGCU TYPE STRING,
MATSTEXT TYPE STRING,
NTWEIGHT TYPE STRING,
GRWEIGHT TYPE STRING,
UTWEIGHT TYPE STRING,
NOPACKUN TYPE STRING,
GOISDATE TYPE STRING,
SMGIDENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PACKLABA_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_PACKLABA_STR-PACKUNIT sy-vline 
WA_PACKLABA_STR-CUSTOMER sy-vline 
WA_PACKLABA_STR-CUSTADDR sy-vline 
WA_PACKLABA_STR-CUSTCTRY sy-vline 
WA_PACKLABA_STR-CUSTULPT sy-vline 
WA_PACKLABA_STR-CUSTRCPT sy-vline 
WA_PACKLABA_STR-CUSTCOID sy-vline 
WA_PACKLABA_STR-SHPPOINT sy-vline 
WA_PACKLABA_STR-SHPPADDR sy-vline 
WA_PACKLABA_STR-DELIVERY sy-vline 
WA_PACKLABA_STR-DELIEXID sy-vline 
WA_PACKLABA_STR-SHIPMENT sy-vline 
WA_PACKLABA_STR-PACKMATR sy-vline 
WA_PACKLABA_STR-PACKMATC sy-vline 
WA_PACKLABA_STR-QUANTITY sy-vline 
WA_PACKLABA_STR-UNITMEAS sy-vline 
WA_PACKLABA_STR-MATERIAL sy-vline 
WA_PACKLABA_STR-MATRCUST sy-vline 
WA_PACKLABA_STR-MATBATCH sy-vline 
WA_PACKLABA_STR-MATENGCU sy-vline 
WA_PACKLABA_STR-MATSTEXT sy-vline 
WA_PACKLABA_STR-NTWEIGHT sy-vline 
WA_PACKLABA_STR-GRWEIGHT sy-vline 
WA_PACKLABA_STR-UTWEIGHT sy-vline 
WA_PACKLABA_STR-NOPACKUN sy-vline 
WA_PACKLABA_STR-GOISDATE sy-vline 
WA_PACKLABA_STR-SMGIDENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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