ABAP Select data from SAP table P1704 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P1704 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 P1704. 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 P1704 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_P1704 TYPE STANDARD TABLE OF P1704,
      WA_P1704 TYPE P1704,
      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: <P1704> TYPE P1704.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P1704.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P1704
  INTO TABLE IT_P1704.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P1704
*  INTO TABLE @DATA(IT_P17042).
*--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_P1704 INDEX 1 INTO DATA(WA_P17042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P1704 ASSIGNING <P1704>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P1704>-MANDT = 1.
<P1704>-PLVAR = 1.
<P1704>-OTYPE = 1.
<P1704>-OBJID = 1.
<P1704>-INFTY = 1.

ENDLOOP.

LOOP AT IT_P1704 INTO WA_P1704.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P1704-SUBTY, sy-vline,
  WA_P1704-ISTAT, sy-vline,
  WA_P1704-PRIOX, sy-vline,
  WA_P1704-BEGDA, sy-vline,
  WA_P1704-ENDDA, sy-vline,
  WA_P1704-VARYF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P1704 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_P1704 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_P1704 INTO WA_P1704.


*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_P1704_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
ISTAT TYPE STRING,
PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
VARYF TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
REASN TYPE STRING,
HISTO TYPE STRING,
ITXNR TYPE STRING,
CHGRP TYPE STRING,
SBPRF TYPE STRING,
CHTYP TYPE STRING,
SBAUD TYPE STRING,
KONFE TYPE STRING,
ETHNIC TYPE STRING,
ORIGIN TYPE STRING,
TAETE TYPE STRING,
SOCIAL TYPE STRING,
SERV_STAT TYPE STRING,
SERV_NR TYPE STRING,
VETERAN_NR TYPE STRING,
DR_LIC_NO TYPE STRING,
DR_LIC_LAND1 TYPE STRING,
DR_LIC_REGIO TYPE STRING,
PARENTAL_OCCUP2010 TYPE STRING,
SOCIO_ECNOMIC_CLASS2010 TYPE STRING,
TIN_CERTIFICATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P1704_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_P1704_STR-MANDT sy-vline 
WA_P1704_STR-PLVAR sy-vline 
WA_P1704_STR-OTYPE sy-vline 
WA_P1704_STR-OBJID sy-vline 
WA_P1704_STR-INFTY sy-vline 
WA_P1704_STR-SUBTY sy-vline 
WA_P1704_STR-ISTAT sy-vline 
WA_P1704_STR-PRIOX sy-vline 
WA_P1704_STR-BEGDA sy-vline 
WA_P1704_STR-ENDDA sy-vline 
WA_P1704_STR-VARYF sy-vline 
WA_P1704_STR-SEQNR sy-vline 
WA_P1704_STR-AEDTM sy-vline 
WA_P1704_STR-UNAME sy-vline 
WA_P1704_STR-REASN sy-vline 
WA_P1704_STR-HISTO sy-vline 
WA_P1704_STR-ITXNR sy-vline 
WA_P1704_STR-CHGRP sy-vline 
WA_P1704_STR-SBPRF sy-vline 
WA_P1704_STR-CHTYP sy-vline 
WA_P1704_STR-SBAUD sy-vline 
WA_P1704_STR-KONFE sy-vline 
WA_P1704_STR-ETHNIC sy-vline 
WA_P1704_STR-ORIGIN sy-vline 
WA_P1704_STR-TAETE sy-vline 
WA_P1704_STR-SOCIAL sy-vline 
WA_P1704_STR-SERV_STAT sy-vline 
WA_P1704_STR-SERV_NR sy-vline 
WA_P1704_STR-VETERAN_NR sy-vline 
WA_P1704_STR-DR_LIC_NO sy-vline 
WA_P1704_STR-DR_LIC_LAND1 sy-vline 
WA_P1704_STR-DR_LIC_REGIO sy-vline 
WA_P1704_STR-PARENTAL_OCCUP2010 sy-vline 
WA_P1704_STR-SOCIO_ECNOMIC_CLASS2010 sy-vline 
WA_P1704_STR-TIN_CERTIFICATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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