В таблице "test.db" меняем названия полей так (через OPAL):

var
tbl Table
tcFlds TCursor
dynNewStru DynArray[] Anytype
pole, tempTbl String
endvar

tbl.attach( "test.db" )
tempTbl="field_struct.db"
tbl.enumFieldStruct(tempTbl)
tcFlds.open(tempTbl)
tcFlds.edit()
scan tcFlds :
pole=tcFlds."Field Name"
switch
case pole = "Field1":
tcFlds."Field Name" = "Фамилия"
tcFlds."Size" = "30"
case pole = "Field2":
tcFlds."Field Name" = "Имя"
tcFlds."Size" = "30"
case pole = "Field3":
tcFlds."Field Name" = "Отчество"
tcFlds."Size" = "30"
endSwitch
endScan
tcFlds.endEdit()
tcFlds.close()
dynNewStru["FIELDSTRUCT"] = tempTbl
dynNewStru["LANGUAGEDRIVER"] = "ANCYRR"
tbl.restructure( dynNewStru )
delete(tempTbl)