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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MATRQ
*  INTO TABLE @DATA(IT_/SAPAPO/MATRQ2).
*--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/MATRQ INDEX 1 INTO DATA(WA_/SAPAPO/MATRQ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MATRQ>-MANDT = 1.
</SAPAPO/MATRQ>-RQMID = 1.
</SAPAPO/MATRQ>-INCLUDE_PROF = 1.
</SAPAPO/MATRQ>-RQMKY = 1.
</SAPAPO/MATRQ>-RQMTX = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MATRQ-VRMOD, sy-vline,
  WA_/SAPAPO/MATRQ-VINT1, sy-vline,
  WA_/SAPAPO/MATRQ-VINT2, sy-vline,
  WA_/SAPAPO/MATRQ-STRA1, sy-vline,
  WA_/SAPAPO/MATRQ-SBDKZ, sy-vline,
  WA_/SAPAPO/MATRQ-MISKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MATRQ 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/MATRQ 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/MATRQ INTO WA_/SAPAPO/MATRQ.


*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 TSTRN, internal->external for field PEG_PAST_MAX
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATRQ-PEG_PAST_MAX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATRQ-PEG_PAST_MAX.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field PEG_PAST_ALERT
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATRQ-PEG_PAST_ALERT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATRQ-PEG_PAST_ALERT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field PEG_FUTURE_MAX
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATRQ-PEG_FUTURE_MAX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATRQ-PEG_FUTURE_MAX.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field PEG_FUTURE_ALERT
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATRQ-PEG_FUTURE_ALERT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATRQ-PEG_FUTURE_ALERT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field PEG_LOT_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MATRQ-PEG_LOT_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MATRQ-PEG_LOT_TIME.
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/MATRQ_STR, 
MANDT TYPE STRING,
RQMID TYPE STRING,
INCLUDE_PROF TYPE STRING,
RQMKY TYPE STRING,
RQMTX TYPE STRING,
VRMOD TYPE STRING,
VINT1 TYPE STRING,
VINT2 TYPE STRING,
STRA1 TYPE STRING,
SBDKZ TYPE STRING,
MISKZ TYPE STRING,
TBID_RPM TYPE STRING,
BDGRP TYPE STRING,
DCHARVAL_PROP TYPE STRING,
TOL_PROF TYPE STRING,
REL_PROF TYPE STRING,
AGGR_FCST_CONS TYPE STRING,
UNETO TYPE STRING,
UEETO TYPE STRING,
GES_MNG_USE TYPE STRING,
GES_BST_USE TYPE STRING,
PEG_PAST_MAX TYPE STRING,
PEG_PAST_ALERT TYPE STRING,
PEG_FUTURE_MAX TYPE STRING,
PEG_FUTURE_ALERT TYPE STRING,
PEG_STRATEGY TYPE STRING,
PEG_WO_ALERT_FST TYPE STRING,
PEG_CONCURRENT TYPE STRING,
PEG_LOT_TIME TYPE STRING,
NOPEG_ST_QUALI TYPE STRING,
NOPEG_ST_UNRESTR TYPE STRING,
PEG_ST_BLOCKED TYPE STRING,
PEG_ST_RESTR TYPE STRING,
PEG_ST_TRANSIT TYPE STRING,
PEG_ST_TR_LOC TYPE STRING,
NOPEG_ST_TR_SLOC TYPE STRING,
PEG_NO_DYN TYPE STRING,
FIXPEG_PROD_SET TYPE STRING,
TOLPRPL TYPE STRING,
TOLPRMI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MATRQ_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/MATRQ_STR-MANDT sy-vline 
WA_/SAPAPO/MATRQ_STR-RQMID sy-vline 
WA_/SAPAPO/MATRQ_STR-INCLUDE_PROF sy-vline 
WA_/SAPAPO/MATRQ_STR-RQMKY sy-vline 
WA_/SAPAPO/MATRQ_STR-RQMTX sy-vline 
WA_/SAPAPO/MATRQ_STR-VRMOD sy-vline 
WA_/SAPAPO/MATRQ_STR-VINT1 sy-vline 
WA_/SAPAPO/MATRQ_STR-VINT2 sy-vline 
WA_/SAPAPO/MATRQ_STR-STRA1 sy-vline 
WA_/SAPAPO/MATRQ_STR-SBDKZ sy-vline 
WA_/SAPAPO/MATRQ_STR-MISKZ sy-vline 
WA_/SAPAPO/MATRQ_STR-TBID_RPM sy-vline 
WA_/SAPAPO/MATRQ_STR-BDGRP sy-vline 
WA_/SAPAPO/MATRQ_STR-DCHARVAL_PROP sy-vline 
WA_/SAPAPO/MATRQ_STR-TOL_PROF sy-vline 
WA_/SAPAPO/MATRQ_STR-REL_PROF sy-vline 
WA_/SAPAPO/MATRQ_STR-AGGR_FCST_CONS sy-vline 
WA_/SAPAPO/MATRQ_STR-UNETO sy-vline 
WA_/SAPAPO/MATRQ_STR-UEETO sy-vline 
WA_/SAPAPO/MATRQ_STR-GES_MNG_USE sy-vline 
WA_/SAPAPO/MATRQ_STR-GES_BST_USE sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_PAST_MAX sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_PAST_ALERT sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_FUTURE_MAX sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_FUTURE_ALERT sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_STRATEGY sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_WO_ALERT_FST sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_CONCURRENT sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_LOT_TIME sy-vline 
WA_/SAPAPO/MATRQ_STR-NOPEG_ST_QUALI sy-vline 
WA_/SAPAPO/MATRQ_STR-NOPEG_ST_UNRESTR sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_ST_BLOCKED sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_ST_RESTR sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_ST_TRANSIT sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_ST_TR_LOC sy-vline 
WA_/SAPAPO/MATRQ_STR-NOPEG_ST_TR_SLOC sy-vline 
WA_/SAPAPO/MATRQ_STR-PEG_NO_DYN sy-vline 
WA_/SAPAPO/MATRQ_STR-FIXPEG_PROD_SET sy-vline 
WA_/SAPAPO/MATRQ_STR-TOLPRPL sy-vline 
WA_/SAPAPO/MATRQ_STR-TOLPRMI sy-vline      INTO ld_text SEPARATED BY SPACE.

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