This is the documentation for Cloudera Impala 1.2.4.
Documentation for other versions is available at Cloudera Documentation.

Appendix C - Impala Reserved Words

The following are the reserved words for Cloudera Impala 1.2.4. A reserved word is one that cannot be used directly as an identifier; you must quote it with backticks. For example, a statement CREATE TABLE select (x INT) fails, while CREATE TABLE `select` (x INT) succeeds. Impala reserves the names of aggregate functions, but not regular built-in functions.

Because different database systems have different sets of reserved words, and the reserved words change from release to release, carefully consider database, table, and column names to ensure maximum compatibility between products and versions.

add
aggregate
all
alter
and
as
asc
avg
avro
between
bigint
boolean
by
case
cast
change
char
column
columns
comment
compute
count
create
cross
data
database
databases
date
datetime
delimited
desc
describe
distinct
distinctpc
distinctpcsa
div
double
drop
else
end
escaped
exists
explain
external
false
fields
fileformat
finalize_fn
first
float
format
formatted
from
full
function
functions
group
group_concat
having
if
in
init_fn
inner
inpath
insert
int
integer
intermediate
interval
into
invalidate
is
join
last
left
like
limit
lines
load
location
max
merge_fn
metadata
min
ndv
not
null
nulls
offset
on
or
order
outer
overwrite
parquet
parquetfile
partition
partitioned
rcfile
real
refresh
regexp
rename
replace
returns
right
rlike
row
schema
schemas
select
semi
sequencefile
serdeproperties
serialize_fn
set
show
smallint
stats
stored
straight_join
string
sum
symbol
table
tables
tblproperties
terminated
textfile
then
timestamp
tinyint
to
true
union
update_fn
use
using
values
view
when
where
with