ABAP Select data from SAP table T059P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T059P 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 T059P. 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 T059P 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_T059P TYPE STANDARD TABLE OF T059P,
      WA_T059P TYPE T059P,
      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: <T059P> TYPE T059P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T059P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T059P
  INTO TABLE IT_T059P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T059P
*  INTO TABLE @DATA(IT_T059P2).
*--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_T059P INDEX 1 INTO DATA(WA_T059P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T059P ASSIGNING <T059P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T059P>-MANDT = 1.
<T059P>-LAND1 = 1.
<T059P>-WITHT = 1.
<T059P>-WT_TPNR = 1.
<T059P>-WT_ACCPT = 1.

ENDLOOP.

LOOP AT IT_T059P INTO WA_T059P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T059P-WT_ACCALL, sy-vline,
  WA_T059P-WT_ACCTMAX, sy-vline,
  WA_T059P-WT_WTRD, sy-vline,
  WA_T059P-WT_CEINV, sy-vline,
  WA_T059P-WT_BASE, sy-vline,
  WA_T059P-WT_DOPOST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T059P 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_T059P 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_T059P INTO WA_T059P.


*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 J_1BTEXKEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_T059P-J_1BTEXKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T059P-J_1BTEXKEY.
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_T059P_STR, 
MANDT TYPE STRING,
LAND1 TYPE STRING,
WITHT TYPE STRING,
WT_TPNR TYPE STRING,
WT_ACCPT TYPE STRING,
WT_ACCALL TYPE STRING,
WT_ACCTMAX TYPE STRING,
WT_WTRD TYPE STRING,
WT_CEINV TYPE STRING,
WT_BASE TYPE STRING,
WT_DOPOST TYPE STRING,
WT_POSTM TYPE STRING,
WT_ALWT TYPE STRING,
WT_WTDSC TYPE STRING,
WT_SLFWT TYPE STRING,
WT_WTDP TYPE STRING,
WT_MANUAL TYPE STRING,
WT_MAINTB TYPE STRING,
WT_MAINTA TYPE STRING,
WT_REDBAS TYPE STRING,
WT_WTINV TYPE STRING,
REGIO TYPE STRING,
TDFORM TYPE STRING,
WT_BCPLVL TYPE STRING,
WT_CTNBRL TYPE STRING,
WT_MANBAS TYPE STRING,
KSCHL TYPE STRING,
J_1BSUMVAL TYPE STRING,
J_1BTEXKEY TYPE STRING,
WT_KURST TYPE STRING,
WT_INHERITBASE TYPE STRING,
WT_NOREDUCTION TYPE STRING,
J_1AFORMAT TYPE STRING,
KSCHL_TX TYPE STRING,
J_1BWHTBASE_NF TYPE STRING,
ALL_TAX_CODES TYPE STRING,
J_DAILY_ACC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T059P_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_T059P_STR-MANDT sy-vline 
WA_T059P_STR-LAND1 sy-vline 
WA_T059P_STR-WITHT sy-vline 
WA_T059P_STR-WT_TPNR sy-vline 
WA_T059P_STR-WT_ACCPT sy-vline 
WA_T059P_STR-WT_ACCALL sy-vline 
WA_T059P_STR-WT_ACCTMAX sy-vline 
WA_T059P_STR-WT_WTRD sy-vline 
WA_T059P_STR-WT_CEINV sy-vline 
WA_T059P_STR-WT_BASE sy-vline 
WA_T059P_STR-WT_DOPOST sy-vline 
WA_T059P_STR-WT_POSTM sy-vline 
WA_T059P_STR-WT_ALWT sy-vline 
WA_T059P_STR-WT_WTDSC sy-vline 
WA_T059P_STR-WT_SLFWT sy-vline 
WA_T059P_STR-WT_WTDP sy-vline 
WA_T059P_STR-WT_MANUAL sy-vline 
WA_T059P_STR-WT_MAINTB sy-vline 
WA_T059P_STR-WT_MAINTA sy-vline 
WA_T059P_STR-WT_REDBAS sy-vline 
WA_T059P_STR-WT_WTINV sy-vline 
WA_T059P_STR-REGIO sy-vline 
WA_T059P_STR-TDFORM sy-vline 
WA_T059P_STR-WT_BCPLVL sy-vline 
WA_T059P_STR-WT_CTNBRL sy-vline 
WA_T059P_STR-WT_MANBAS sy-vline 
WA_T059P_STR-KSCHL sy-vline 
WA_T059P_STR-J_1BSUMVAL sy-vline 
WA_T059P_STR-J_1BTEXKEY sy-vline 
WA_T059P_STR-WT_KURST sy-vline 
WA_T059P_STR-WT_INHERITBASE sy-vline 
WA_T059P_STR-WT_NOREDUCTION sy-vline 
WA_T059P_STR-J_1AFORMAT sy-vline 
WA_T059P_STR-KSCHL_TX sy-vline 
WA_T059P_STR-J_1BWHTBASE_NF sy-vline 
WA_T059P_STR-ALL_TAX_CODES sy-vline 
WA_T059P_STR-J_DAILY_ACC sy-vline      INTO ld_text SEPARATED BY SPACE.

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