literal string single and double quoting rule are a bit different from mysql

[whitewum]

In mysql: Quoted strings placed next to each other are concatenated to a single string.

'a string'

'a' ' ' 'string'

mysql> SELECT 'hello', '"hello"', '""hello""', 'hel''lo', '\'hello';
+-------+---------+-----------+--------+--------+
| hello | "hello" | ""hello"" | hel'lo | 'hello |
+-------+---------+-----------+--------+--------+

mysql> SELECT "hello", "'hello'", "''hello''", "hel""lo", "\"hello";
+-------+---------+-----------+--------+--------+
| hello | 'hello' | ''hello'' | hel"lo | "hello |
+-------+---------+-----------+--------+--------+

ref #543

[whitewum]

some of the above literals are syntax error in nGQL