ABAP Select data from SAP table /LIMEB/HU_MAINTAIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /LIMEB/HU_MAINTAIN
*  INTO TABLE @DATA(IT_/LIMEB/HU_MAINTAIN2).
*--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_/LIMEB/HU_MAINTAIN INDEX 1 INTO DATA(WA_/LIMEB/HU_MAINTAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</LIMEB/HU_MAINTAIN>-ID = 1.
</LIMEB/HU_MAINTAIN>-ID_PARENT = 1.
</LIMEB/HU_MAINTAIN>-ID_GROUP = 1.
</LIMEB/HU_MAINTAIN>-IDX_HU = 1.
</LIMEB/HU_MAINTAIN>-GUID_HU = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/LIMEB/HU_MAINTAIN-SSCC, sy-vline,
  WA_/LIMEB/HU_MAINTAIN-PARENT_LOC, sy-vline,
  WA_/LIMEB/HU_MAINTAIN-IDX_LOC, sy-vline,
  WA_/LIMEB/HU_MAINTAIN-GUID_LOC, sy-vline,
  WA_/LIMEB/HU_MAINTAIN-WERKS, sy-vline,
  WA_/LIMEB/HU_MAINTAIN-LGORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/LIMEB/HU_MAINTAIN 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_/LIMEB/HU_MAINTAIN 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_/LIMEB/HU_MAINTAIN INTO WA_/LIMEB/HU_MAINTAIN.


*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 PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/LIMEB/HU_MAINTAIN-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/LIMEB/HU_MAINTAIN-PARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CUSTODIAN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/LIMEB/HU_MAINTAIN-CUSTODIAN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/LIMEB/HU_MAINTAIN-CUSTODIAN.
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_/LIMEB/HU_MAINTAIN_STR, 
ID TYPE STRING,
ID_PARENT TYPE STRING,
ID_GROUP TYPE STRING,
IDX_HU TYPE STRING,
GUID_HU TYPE STRING,
SSCC TYPE STRING,
PARENT_LOC TYPE STRING,
IDX_LOC TYPE STRING,
GUID_LOC TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
GLN TYPE STRING,
DUNS4 TYPE STRING,
LOCID TYPE STRING,
APO_LOCNO TYPE STRING,
PARTNER TYPE STRING,
PARTNER_ROLE TYPE STRING,
MOTID TYPE STRING,
MOTSCODE TYPE STRING,
PARENT_HU TYPE STRING,
IDX_HU TYPE STRING,
GUID_HU TYPE STRING,
SSCC TYPE STRING,
ACTION TYPE STRING,
CUSTODIAN TYPE STRING,
CUSTODIAN_ROLE TYPE STRING,
AUTH_GROUP TYPE STRING,
BLOCK_IND TYPE STRING,
INV_BLOCK_IND TYPE STRING,
XCUSTODIAN TYPE STRING,
XAUTH_GROUP TYPE STRING,
XBLOCK_IND TYPE STRING,
XINV_BLOCK_IND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/LIMEB/HU_MAINTAIN_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_/LIMEB/HU_MAINTAIN_STR-ID sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-ID_PARENT sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-ID_GROUP sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-IDX_HU sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-GUID_HU sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-SSCC sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-PARENT_LOC sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-IDX_LOC sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-GUID_LOC sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-WERKS sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-LGORT sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-GLN sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-DUNS4 sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-LOCID sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-APO_LOCNO sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-PARTNER sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-PARTNER_ROLE sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-MOTID sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-MOTSCODE sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-PARENT_HU sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-IDX_HU sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-GUID_HU sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-SSCC sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-ACTION sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-CUSTODIAN sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-CUSTODIAN_ROLE sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-AUTH_GROUP sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-BLOCK_IND sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-INV_BLOCK_IND sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-XCUSTODIAN sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-XAUTH_GROUP sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-XBLOCK_IND sy-vline 
WA_/LIMEB/HU_MAINTAIN_STR-XINV_BLOCK_IND sy-vline      INTO ld_text SEPARATED BY SPACE.

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