ABAP Select data from SAP table Q1654 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP Q1654 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 Q1654. 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 Q1654 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_Q1654 TYPE STANDARD TABLE OF Q1654,
      WA_Q1654 TYPE Q1654,
      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: <Q1654> TYPE Q1654.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_Q1654.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM Q1654
  INTO TABLE IT_Q1654.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM Q1654
*  INTO TABLE @DATA(IT_Q16542).
*--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_Q1654 INDEX 1 INTO DATA(WA_Q16542).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_Q1654 ASSIGNING <Q1654>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<Q1654>-TYPE = 1.
<Q1654>-STTXT = 1.
<Q1654>-TYTXT = 1.
<Q1654>-DETXT = 1.
<Q1654>-OFREF = 1.

ENDLOOP.

LOOP AT IT_Q1654 INTO WA_Q1654.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_Q1654-SEQ01, sy-vline,
  WA_Q1654-AGT01, sy-vline,
  WA_Q1654-ROL01, sy-vline,
  WA_Q1654-SRQ01, sy-vline,
  WA_Q1654-SEQ02, sy-vline,
  WA_Q1654-AGT02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_Q1654 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_Q1654 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_Q1654 INTO WA_Q1654.


*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_Q1654_STR, 
TYPE TYPE STRING,
STTXT TYPE STRING,
TYTXT TYPE STRING,
DETXT TYPE STRING,
OFREF TYPE STRING,
SEQ01 TYPE STRING,
AGT01 TYPE STRING,
ROL01 TYPE STRING,
SRQ01 TYPE STRING,
SEQ02 TYPE STRING,
AGT02 TYPE STRING,
ROL02 TYPE STRING,
SRQ02 TYPE STRING,
SEQ03 TYPE STRING,
AGT03 TYPE STRING,
ROL03 TYPE STRING,
SRQ03 TYPE STRING,
SEQ04 TYPE STRING,
AGT04 TYPE STRING,
ROL04 TYPE STRING,
SRQ04 TYPE STRING,
SEQ05 TYPE STRING,
AGT05 TYPE STRING,
ROL05 TYPE STRING,
SRQ05 TYPE STRING,
SEQ06 TYPE STRING,
AGT06 TYPE STRING,
ROL06 TYPE STRING,
SRQ06 TYPE STRING,
SEQ07 TYPE STRING,
AGT07 TYPE STRING,
ROL07 TYPE STRING,
SRQ07 TYPE STRING,
SEQ08 TYPE STRING,
AGT08 TYPE STRING,
ROL08 TYPE STRING,
SRQ08 TYPE STRING,
SEQ09 TYPE STRING,
AGT09 TYPE STRING,
ROL09 TYPE STRING,
SRQ09 TYPE STRING,
SEQ10 TYPE STRING,
AGT10 TYPE STRING,
ROL10 TYPE STRING,
SRQ10 TYPE STRING,
BEGDA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_Q1654_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_Q1654_STR-TYPE sy-vline 
WA_Q1654_STR-STTXT sy-vline 
WA_Q1654_STR-TYTXT sy-vline 
WA_Q1654_STR-DETXT sy-vline 
WA_Q1654_STR-OFREF sy-vline 
WA_Q1654_STR-SEQ01 sy-vline 
WA_Q1654_STR-AGT01 sy-vline 
WA_Q1654_STR-ROL01 sy-vline 
WA_Q1654_STR-SRQ01 sy-vline 
WA_Q1654_STR-SEQ02 sy-vline 
WA_Q1654_STR-AGT02 sy-vline 
WA_Q1654_STR-ROL02 sy-vline 
WA_Q1654_STR-SRQ02 sy-vline 
WA_Q1654_STR-SEQ03 sy-vline 
WA_Q1654_STR-AGT03 sy-vline 
WA_Q1654_STR-ROL03 sy-vline 
WA_Q1654_STR-SRQ03 sy-vline 
WA_Q1654_STR-SEQ04 sy-vline 
WA_Q1654_STR-AGT04 sy-vline 
WA_Q1654_STR-ROL04 sy-vline 
WA_Q1654_STR-SRQ04 sy-vline 
WA_Q1654_STR-SEQ05 sy-vline 
WA_Q1654_STR-AGT05 sy-vline 
WA_Q1654_STR-ROL05 sy-vline 
WA_Q1654_STR-SRQ05 sy-vline 
WA_Q1654_STR-SEQ06 sy-vline 
WA_Q1654_STR-AGT06 sy-vline 
WA_Q1654_STR-ROL06 sy-vline 
WA_Q1654_STR-SRQ06 sy-vline 
WA_Q1654_STR-SEQ07 sy-vline 
WA_Q1654_STR-AGT07 sy-vline 
WA_Q1654_STR-ROL07 sy-vline 
WA_Q1654_STR-SRQ07 sy-vline 
WA_Q1654_STR-SEQ08 sy-vline 
WA_Q1654_STR-AGT08 sy-vline 
WA_Q1654_STR-ROL08 sy-vline 
WA_Q1654_STR-SRQ08 sy-vline 
WA_Q1654_STR-SEQ09 sy-vline 
WA_Q1654_STR-AGT09 sy-vline 
WA_Q1654_STR-ROL09 sy-vline 
WA_Q1654_STR-SRQ09 sy-vline 
WA_Q1654_STR-SEQ10 sy-vline 
WA_Q1654_STR-AGT10 sy-vline 
WA_Q1654_STR-ROL10 sy-vline 
WA_Q1654_STR-SRQ10 sy-vline 
WA_Q1654_STR-BEGDA sy-vline      INTO ld_text SEPARATED BY SPACE.

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