ABAP Select data from SAP table P1894_EXP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P1894_EXP 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 P1894_EXP. 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 P1894_EXP 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_P1894_EXP TYPE STANDARD TABLE OF P1894_EXP,
      WA_P1894_EXP TYPE P1894_EXP,
      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: <P1894_EXP> TYPE P1894_EXP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P1894_EXP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P1894_EXP
  INTO TABLE IT_P1894_EXP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P1894_EXP
*  INTO TABLE @DATA(IT_P1894_EXP2).
*--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_P1894_EXP INDEX 1 INTO DATA(WA_P1894_EXP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P1894_EXP ASSIGNING <P1894_EXP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P1894_EXP>-MANDT = 1.
<P1894_EXP>-PLVAR = 1.
<P1894_EXP>-OTYPE = 1.
<P1894_EXP>-OBJID = 1.
<P1894_EXP>-INFTY = 1.

ENDLOOP.

LOOP AT IT_P1894_EXP INTO WA_P1894_EXP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P1894_EXP-SUBTY, sy-vline,
  WA_P1894_EXP-ISTAT, sy-vline,
  WA_P1894_EXP-PRIOX, sy-vline,
  WA_P1894_EXP-BEGDA, sy-vline,
  WA_P1894_EXP-ENDDA, sy-vline,
  WA_P1894_EXP-VARYF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P1894_EXP 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_P1894_EXP 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_P1894_EXP INTO WA_P1894_EXP.


*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_P1894_EXP_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,
ADM_AYEAR TYPE STRING,
ADM_PERID TYPE STRING,
TABNR TYPE STRING,
TABSEQNR TYPE STRING,
PAID_INBRIN TYPE STRING,
BRIN_SEQ TYPE STRING,
INITAMT TYPE STRING,
VALUTA_INIT TYPE STRING,
INSTAMT TYPE STRING,
VALUTA_INST TYPE STRING,
PRF_INSTATUS TYPE STRING,
RECEIV_BY TYPE STRING,
RECEIPT_DATE TYPE STRING,
INCANCEL_BY TYPE STRING,
INCANCEL_ON TYPE STRING,
TOTAL_AMT TYPE STRING,
VALUTA_TOT TYPE STRING,
INST_BRIN TYPE STRING,
PRF_OUTSTATUS TYPE STRING,
REG_BY TYPE STRING,
REG_DATE TYPE STRING,
OUTCANCEL_BY TYPE STRING,
OUTCANCEL_ON TYPE STRING,
LEGAL_TUTFEE TYPE STRING,
VALUTA_LEGLFEE TYPE STRING,
INST_TUTFEE TYPE STRING,
VALUTA_INSTFEE TYPE STRING,
PRF_SOURCE TYPE STRING,
IN_LGLFEE_BEGDA TYPE STRING,
IN_LGLFEE_ENDA TYPE STRING,
IN_INSTFEE_BEGDA TYPE STRING,
IN_INSTFEE_ENDA TYPE STRING,
AMOUNT_EXEMPT TYPE STRING,
AMT_EXEMPT_CKY TYPE STRING,
DECISION TYPE STRING,
AMT_EMPT_BEGDA TYPE STRING,
AMT_EMPT_ENDA TYPE STRING,
APPR_REJ_REASON TYPE STRING,
MSG_REC_DATE TYPE STRING,
MSG_REC_TIME TYPE STRING,
MSG_SENT_STAT TYPE STRING,
MSG_SENT_BY TYPE STRING,
MSG_SENT_DATE TYPE STRING,
MSG_SENT_TIME TYPE STRING,
MSG_LOG TYPE STRING,
UPDATE_REASON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P1894_EXP_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_P1894_EXP_STR-MANDT sy-vline 
WA_P1894_EXP_STR-PLVAR sy-vline 
WA_P1894_EXP_STR-OTYPE sy-vline 
WA_P1894_EXP_STR-OBJID sy-vline 
WA_P1894_EXP_STR-INFTY sy-vline 
WA_P1894_EXP_STR-SUBTY sy-vline 
WA_P1894_EXP_STR-ISTAT sy-vline 
WA_P1894_EXP_STR-PRIOX sy-vline 
WA_P1894_EXP_STR-BEGDA sy-vline 
WA_P1894_EXP_STR-ENDDA sy-vline 
WA_P1894_EXP_STR-VARYF sy-vline 
WA_P1894_EXP_STR-SEQNR sy-vline 
WA_P1894_EXP_STR-AEDTM sy-vline 
WA_P1894_EXP_STR-UNAME sy-vline 
WA_P1894_EXP_STR-REASN sy-vline 
WA_P1894_EXP_STR-HISTO sy-vline 
WA_P1894_EXP_STR-ITXNR sy-vline 
WA_P1894_EXP_STR-ADM_AYEAR sy-vline 
WA_P1894_EXP_STR-ADM_PERID sy-vline 
WA_P1894_EXP_STR-TABNR sy-vline 
WA_P1894_EXP_STR-TABSEQNR sy-vline 
WA_P1894_EXP_STR-PAID_INBRIN sy-vline 
WA_P1894_EXP_STR-BRIN_SEQ sy-vline 
WA_P1894_EXP_STR-INITAMT sy-vline 
WA_P1894_EXP_STR-VALUTA_INIT sy-vline 
WA_P1894_EXP_STR-INSTAMT sy-vline 
WA_P1894_EXP_STR-VALUTA_INST sy-vline 
WA_P1894_EXP_STR-PRF_INSTATUS sy-vline 
WA_P1894_EXP_STR-RECEIV_BY sy-vline 
WA_P1894_EXP_STR-RECEIPT_DATE sy-vline 
WA_P1894_EXP_STR-INCANCEL_BY sy-vline 
WA_P1894_EXP_STR-INCANCEL_ON sy-vline 
WA_P1894_EXP_STR-TOTAL_AMT sy-vline 
WA_P1894_EXP_STR-VALUTA_TOT sy-vline 
WA_P1894_EXP_STR-INST_BRIN sy-vline 
WA_P1894_EXP_STR-PRF_OUTSTATUS sy-vline 
WA_P1894_EXP_STR-REG_BY sy-vline 
WA_P1894_EXP_STR-REG_DATE sy-vline 
WA_P1894_EXP_STR-OUTCANCEL_BY sy-vline 
WA_P1894_EXP_STR-OUTCANCEL_ON sy-vline 
WA_P1894_EXP_STR-LEGAL_TUTFEE sy-vline 
WA_P1894_EXP_STR-VALUTA_LEGLFEE sy-vline 
WA_P1894_EXP_STR-INST_TUTFEE sy-vline 
WA_P1894_EXP_STR-VALUTA_INSTFEE sy-vline 
WA_P1894_EXP_STR-PRF_SOURCE sy-vline 
WA_P1894_EXP_STR-IN_LGLFEE_BEGDA sy-vline 
WA_P1894_EXP_STR-IN_LGLFEE_ENDA sy-vline 
WA_P1894_EXP_STR-IN_INSTFEE_BEGDA sy-vline 
WA_P1894_EXP_STR-IN_INSTFEE_ENDA sy-vline 
WA_P1894_EXP_STR-AMOUNT_EXEMPT sy-vline 
WA_P1894_EXP_STR-AMT_EXEMPT_CKY sy-vline 
WA_P1894_EXP_STR-DECISION sy-vline 
WA_P1894_EXP_STR-AMT_EMPT_BEGDA sy-vline 
WA_P1894_EXP_STR-AMT_EMPT_ENDA sy-vline 
WA_P1894_EXP_STR-APPR_REJ_REASON sy-vline 
WA_P1894_EXP_STR-MSG_REC_DATE sy-vline 
WA_P1894_EXP_STR-MSG_REC_TIME sy-vline 
WA_P1894_EXP_STR-MSG_SENT_STAT sy-vline 
WA_P1894_EXP_STR-MSG_SENT_BY sy-vline 
WA_P1894_EXP_STR-MSG_SENT_DATE sy-vline 
WA_P1894_EXP_STR-MSG_SENT_TIME sy-vline 
WA_P1894_EXP_STR-MSG_LOG sy-vline 
WA_P1894_EXP_STR-UPDATE_REASON sy-vline      INTO ld_text SEPARATED BY SPACE.

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