[REBOL] [COMMAND] Database null values
From: davidegessi::tin::it at: 26-Jan-2003 4:59
Hi all,
if I want to append new records to a table I can insert into a command port
insert cmd-port [
"INSERT INTO tab (f1,f2,f3) VALUES (?,?,?)"
v1 v2 v3
]
but how can I handle null values ?
if f1 is a text field and v1 is none, then f1 will set to [to-string none]
:(
Could be the following a good approach ?
to-sql-value: func [
v [any-type!]
][
either none? v [
return "null"
][
either string? v [
return rejoin ["'" to-string v "'"]
][
either date? v [
return rejoin ["#" to-string v "#"]
][
return to-string v
]
]
]
]
sql-str: rejoin ["INSER INTO tab (f1,f2,f3) VALUES (" to-sql-value v1 ","
to-sql-value v2 "," to-sql-value v3 ")"]
insert cmd-port sql-str
Any hint ?
Davide
