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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/AGTT_HUV
*  INTO TABLE @DATA(IT_/SAPAPO/AGTT_HUV2).
*--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/AGTT_HUV INDEX 1 INTO DATA(WA_/SAPAPO/AGTT_HUV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/AGTT_HUV>-MANDT = 1.
</SAPAPO/AGTT_HUV>-SET_VARIANT_NAME = 1.
</SAPAPO/AGTT_HUV>-LOCNO = 1.
</SAPAPO/AGTT_HUV>-PLAN_MODE = 1.
</SAPAPO/AGTT_HUV>-PLAN_DIRECTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/AGTT_HUV-PERIOD_LEVEL, sy-vline,
  WA_/SAPAPO/AGTT_HUV-PPM_SWTCH_PERIOD, sy-vline,
  WA_/SAPAPO/AGTT_HUV-MAX_PERIOD_BACKW, sy-vline,
  WA_/SAPAPO/AGTT_HUV-PERIOD_BLOCK, sy-vline,
  WA_/SAPAPO/AGTT_HUV-MAX_MODLVL_DEPTH, sy-vline,
  WA_/SAPAPO/AGTT_HUV-PPM_PROCURE_PRIO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/AGTT_HUV 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/AGTT_HUV 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/AGTT_HUV INTO WA_/SAPAPO/AGTT_HUV.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SAPAPO/AGTT_HUV_STR, 
MANDT TYPE STRING,
SET_VARIANT_NAME TYPE STRING,
LOCNO TYPE STRING,
PLAN_MODE TYPE STRING,
PLAN_DIRECTION TYPE STRING,
PERIOD_LEVEL TYPE STRING,
PPM_SWTCH_PERIOD TYPE STRING,
MAX_PERIOD_BACKW TYPE STRING,
PERIOD_BLOCK TYPE STRING,
MAX_MODLVL_DEPTH TYPE STRING,
PPM_PROCURE_PRIO TYPE STRING,
RESPECT_PTF TYPE STRING,
SCHED_ERROR_ACT TYPE STRING,
IGNORE_FIXED_ORD TYPE STRING,
IGNORE_FIRMD_ORD TYPE STRING,
ONLY_DEALLOC_ORD TYPE STRING,
EXTENDED_LOG TYPE STRING,
SORTSEQ_SNP2PRIO TYPE STRING,
SORTDIR_SNP2PRIO TYPE STRING,
SORTSEQ_PRODPRIO TYPE STRING,
SORTDIR_PRODPRIO TYPE STRING,
SORTSEQ_WEIGHT TYPE STRING,
SORTDIR_WEIGHT TYPE STRING,
SORTSEQ_VOLUME TYPE STRING,
SORTDIR_VOLUME TYPE STRING,
SORTSEQ_SHELFLIF TYPE STRING,
SORTDIR_SHELFLIF TYPE STRING,
SORTSEQ_MATGRP TYPE STRING,
SORTDIR_MATGRP TYPE STRING,
SORTSEQ_PLANNER TYPE STRING,
SORTDIR_PLANNER TYPE STRING,
SORTSEQ_PRODNO TYPE STRING,
SORTDIR_PRODNO TYPE STRING,
SORTSEQ_ATT01 TYPE STRING,
SORTDIR_ATT01 TYPE STRING,
SORTSEQ_ATT02 TYPE STRING,
SORTDIR_ATT02 TYPE STRING,
SORTSEQ_ATT03 TYPE STRING,
SORTDIR_ATT03 TYPE STRING,
SORTSEQ_ATT04 TYPE STRING,
SORTDIR_ATT04 TYPE STRING,
SORTSEQ_ATT05 TYPE STRING,
SORTDIR_ATT05 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/AGTT_HUV_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/AGTT_HUV_STR-MANDT sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SET_VARIANT_NAME sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-LOCNO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-PLAN_MODE sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-PLAN_DIRECTION sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-PERIOD_LEVEL sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-PPM_SWTCH_PERIOD sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-MAX_PERIOD_BACKW sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-PERIOD_BLOCK sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-MAX_MODLVL_DEPTH sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-PPM_PROCURE_PRIO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-RESPECT_PTF sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SCHED_ERROR_ACT sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-IGNORE_FIXED_ORD sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-IGNORE_FIRMD_ORD sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-ONLY_DEALLOC_ORD sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-EXTENDED_LOG sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_SNP2PRIO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_SNP2PRIO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_PRODPRIO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_PRODPRIO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_WEIGHT sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_WEIGHT sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_VOLUME sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_VOLUME sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_SHELFLIF sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_SHELFLIF sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_MATGRP sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_MATGRP sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_PLANNER sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_PLANNER sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_PRODNO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_PRODNO sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_ATT01 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_ATT01 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_ATT02 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_ATT02 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_ATT03 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_ATT03 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_ATT04 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_ATT04 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTSEQ_ATT05 sy-vline 
WA_/SAPAPO/AGTT_HUV_STR-SORTDIR_ATT05 sy-vline      INTO ld_text SEPARATED BY SPACE.

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