Support SELECT INTO OUTFILE syntax

[dl239]

SELECT xxx INTO OUTFILE '/xxx/t2.csv' OPTIONS ( delimit = ',' );
SELECT xxx INTO OUTFILE '/xxx/t2.csv';

[jingchen2222]

@aceforeverd Does zetasql support syntax like that?
If not, we might need to work it out.

[aceforeverd]

@aceforeverd Does zetasql support syntax like that?
If not, we might need to work it out.

not supported yet

[tobegit3hub]

We should support options like these.

Options	Type	Default
delimiter	String	,
header	Boolean	true
null_value	String	null
format	String	csv
mode	String	error_if_exists