Array access notation on function call results in broken SQL

[rgehan]

It seems SQLValidator has issues with array access notation on the result of a function call (both with OFFSET and SAFE_OFFSET)

-- Before
SELECT SPLIT(list, ':')[SAFE_OFFSET(0)] item
FROM mytable

-- After
SELECT SPLIT(list, ':') [
FROM mytable

Note that without the function call before, the format is correct:

-- Before
SELECT arr[OFFSET(0)] item FROM mytable

-- After
SELECT arr[OFFSET(0)] item
FROM mytable