SELECT 123abc;
SELECT 0x0o;
SELECT 0.a;
SELECT 0.0a;
SELECT .0a;
SELECT 0.0e1a;
SELECT 0.0e;
SELECT 0.0e+a;
SELECT $1a;
SELECT 0b;
SELECT 1b;
SELECT 0b0x;
SELECT 0o;
SELECT 1o;
SELECT 0o0x;
SELECT 0x;
SELECT 1x;
SELECT 0x0y;
SELECT 0o999;
SELECT 0o7889;
SELECT 0b234;
SELECT 0b101_010_;
SELECT 100_;
SELECT 100__000;
SELECT _1_000.5;
SELECT 1_000_.5;
SELECT 1_000._5;
SELECT 1_000.5_;
SELECT 1_000.5e_1;
SELECT $0_1;
SELECT $2147483648;
-- empty placeholder
SELECT $;
SELECT $0111111111111111111111111111111111111111111111111111;
SELECT "";
SELECT U&"";
