ABAP Select data from SAP table EWATDEVLOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EWATDEVLOC
*  INTO TABLE @DATA(IT_EWATDEVLOC2).
*--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_EWATDEVLOC INDEX 1 INTO DATA(WA_EWATDEVLOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EWATDEVLOC>-MANDT = 1.
<EWATDEVLOC>-ORDERNR = 1.
<EWATDEVLOC>-LAUFNR = 1.
<EWATDEVLOC>-AUFNR = 1.
<EWATDEVLOC>-MATNR_NEU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EWATDEVLOC-GERAET_NEU, sy-vline,
  WA_EWATDEVLOC-DEVGRP_NEU, sy-vline,
  WA_EWATDEVLOC-MATNR_ALT, sy-vline,
  WA_EWATDEVLOC-GERAET_ALT, sy-vline,
  WA_EWATDEVLOC-DEVGRP, sy-vline,
  WA_EWATDEVLOC-DEVLOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EWATDEVLOC 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_EWATDEVLOC 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_EWATDEVLOC INTO WA_EWATDEVLOC.


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

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

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

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

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

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

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

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

*Conversion exit TPLNR, internal->external for field DEVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_EWATDEVLOC-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWATDEVLOC-DEVLOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IBASE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EWATDEVLOC-IBASE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EWATDEVLOC-IBASE.
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_EWATDEVLOC_STR, 
MANDT TYPE STRING,
ORDERNR TYPE STRING,
LAUFNR TYPE STRING,
AUFNR TYPE STRING,
MATNR_NEU TYPE STRING,
GERAET_NEU TYPE STRING,
DEVGRP_NEU TYPE STRING,
MATNR_ALT TYPE STRING,
GERAET_ALT TYPE STRING,
DEVGRP TYPE STRING,
DEVLOC TYPE STRING,
EINBDAT TYPE STRING,
AUSBDAT TYPE STRING,
LVORM TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
POBJNR TYPE STRING,
PLANNED_TIME TYPE STRING,
IBASE TYPE STRING,
LOGIKNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EWATDEVLOC_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_EWATDEVLOC_STR-MANDT sy-vline 
WA_EWATDEVLOC_STR-ORDERNR sy-vline 
WA_EWATDEVLOC_STR-LAUFNR sy-vline 
WA_EWATDEVLOC_STR-AUFNR sy-vline 
WA_EWATDEVLOC_STR-MATNR_NEU sy-vline 
WA_EWATDEVLOC_STR-GERAET_NEU sy-vline 
WA_EWATDEVLOC_STR-DEVGRP_NEU sy-vline 
WA_EWATDEVLOC_STR-MATNR_ALT sy-vline 
WA_EWATDEVLOC_STR-GERAET_ALT sy-vline 
WA_EWATDEVLOC_STR-DEVGRP sy-vline 
WA_EWATDEVLOC_STR-DEVLOC sy-vline 
WA_EWATDEVLOC_STR-EINBDAT sy-vline 
WA_EWATDEVLOC_STR-AUSBDAT sy-vline 
WA_EWATDEVLOC_STR-LVORM sy-vline 
WA_EWATDEVLOC_STR-ERDAT sy-vline 
WA_EWATDEVLOC_STR-ERNAM sy-vline 
WA_EWATDEVLOC_STR-AEDAT sy-vline 
WA_EWATDEVLOC_STR-AENAM sy-vline 
WA_EWATDEVLOC_STR-BEGRU sy-vline 
WA_EWATDEVLOC_STR-LOEVM sy-vline 
WA_EWATDEVLOC_STR-POBJNR sy-vline 
WA_EWATDEVLOC_STR-PLANNED_TIME sy-vline 
WA_EWATDEVLOC_STR-IBASE sy-vline 
WA_EWATDEVLOC_STR-LOGIKNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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