ABAP Select data from SAP table /SAPAPO/MATEXEC_I into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/MATEXEC_I 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 /SAPAPO/MATEXEC_I. 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 /SAPAPO/MATEXEC_I 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_/SAPAPO/MATEXEC_I TYPE STANDARD TABLE OF /SAPAPO/MATEXEC_I,
      WA_/SAPAPO/MATEXEC_I TYPE /SAPAPO/MATEXEC_I,
      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: </SAPAPO/MATEXEC_I> TYPE /SAPAPO/MATEXEC_I.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/MATEXEC_I
  INTO TABLE IT_/SAPAPO/MATEXEC_I.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MATEXEC_I
*  INTO TABLE @DATA(IT_/SAPAPO/MATEXEC_I2).
*--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_/SAPAPO/MATEXEC_I INDEX 1 INTO DATA(WA_/SAPAPO/MATEXEC_I2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/MATEXEC_I ASSIGNING </SAPAPO/MATEXEC_I>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MATEXEC_I>-PILFERABLE = 1.
</SAPAPO/MATEXEC_I>-WHMATGR = 1.
</SAPAPO/MATEXEC_I>-WHSTC = 1.
</SAPAPO/MATEXEC_I>-HNDLCODE = 1.
</SAPAPO/MATEXEC_I>-ENVREL = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/MATEXEC_I INTO WA_/SAPAPO/MATEXEC_I.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MATEXEC_I-DGPROFL, sy-vline,
  WA_/SAPAPO/MATEXEC_I-HAZMAT, sy-vline,
  WA_/SAPAPO/MATEXEC_I-ITMTPG, sy-vline,
  WA_/SAPAPO/MATEXEC_I-MFRGR, sy-vline,
  WA_/SAPAPO/MATEXEC_I-QQTIME, sy-vline,
  WA_/SAPAPO/MATEXEC_I-QQTIMEUOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MATEXEC_I 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_/SAPAPO/MATEXEC_I 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_/SAPAPO/MATEXEC_I INTO WA_/SAPAPO/MATEXEC_I.


*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 CUNIT, internal->external for field QQTIMEUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATEXEC_I-QQTIMEUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATEXEC_I-QQTIMEUOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATEXEC_I-PUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATEXEC_I-PUOM.
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_/SAPAPO/MATEXEC_I_STR, 
PILFERABLE TYPE STRING,
WHMATGR TYPE STRING,
WHSTC TYPE STRING,
HNDLCODE TYPE STRING,
ENVREL TYPE STRING,
DGPROFL TYPE STRING,
HAZMAT TYPE STRING,
ITMTPG TYPE STRING,
MFRGR TYPE STRING,
QQTIME TYPE STRING,
QQTIMEUOM TYPE STRING,
QGRP TYPE STRING,
CWTOLGR TYPE STRING,
CWPROC TYPE STRING,
MEDI_APROF TYPE STRING,
PUOM TYPE STRING,
CLASS TYPE STRING,
KLART TYPE STRING,
PLANT_BATCH_HANDLING TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MATEXEC_I_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_/SAPAPO/MATEXEC_I_STR-PILFERABLE sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-WHMATGR sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-WHSTC sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-HNDLCODE sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-ENVREL sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-DGPROFL sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-HAZMAT sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-ITMTPG sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-MFRGR sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-QQTIME sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-QQTIMEUOM sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-QGRP sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-CWTOLGR sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-CWPROC sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-MEDI_APROF sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-PUOM sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-CLASS sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-KLART sy-vline 
WA_/SAPAPO/MATEXEC_I_STR-PLANT_BATCH_HANDLING sy-vline      INTO ld_text SEPARATED BY SPACE.

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