problem in the select query

Hi.

here i have to make the code in exit_saplv56u_004 in include zxv56u11.

there are tables defined in itself.

i have written like this,but not sure about the table updation and the declaration part:

here i am writing this code in exit_sap

TABLES:VTTP,VTTK,LIKP,KNA1.

TABLES:ZOTC_SHPMNT_RTE.

DATA:x_vttp type vttpvb,

x_vttk type vttkvb,

X_LIKP TYPE LIKP,

X_KNA1 TYPE KNA1,

X_ZOTC_SHPMNT_RTE TYPE ZOTC_SHPMNT_RTE,

t_temp type vttk, feels that declaration iswrong

x_temp type vttk. this table andwork area will be used to finally update vttk table feilds

READ TABLE I_XVTTK INTO X_VTTK INDEX 1.

READ TABLE I_XVTTP INTO X_VTTP INDEX 1.

CLEAR X_LIKP.

SELECT SINGLE * FROM LIKP

INTO X_LIKP

WHERE VBELN = X_VTTP-VBELN.

IF SY-SUBRC = 0.

CLEAR X_KNA1.

SELECT SINGLE * FROM KNA1 i jus need 2-3 feilds so howcan i avoid the performance prob

INTO X_KNA1

WHERE KUNNR = X_LIKP-KUNNR.

IF SY-SUBRC = 0.

CLEAR X_TEMP.

SELECT SINGLE * FROM ZOTC_SHPMNT_RTE INTO table t_TEMP

WHERE SHTYP = X_VTTK-SHTYP

AND LAND1 = X_KNA1-LAND1

AND BLAND = X_KNA1-REGIO

AND ZONE1 = X_KNA1-LZONE.

IF SY-SUBRC = 0.

• IF T_TEMP[] IS INITIAL.

READ TABLE T_TEMP INTO X_TEMP. i want to create a temp internal table

ELSE.

SELECT SINGLE * FROM ZOTC_SHPMNT_RTE INTO TABLE t_TEMP

WHERE SHTYP = X_VTTK-SHTYP

AND LAND1 = X_KNA1-LAND1

AND BLAND = X_KNA1-REGIO.

IF SY-SUBRC = 0.

READ TABLE T_TEMP INTO X_TEMP.

IF SY-SUBRC = 0.

MODIFY vttk FROM t_TEMP. here i want to modify the feilds like vttk-route and vttk-tdlnr

ENDIF.

ENDIF.

ENDIF.

endif.

endif.