兼容q’转义字符语法
atlasdb=# select q'asdffwwda';
?column?
----------
sdffwwd
(1 row)
atlasdb=#
atlasdb=# select q'df'er'ew'd';
?column?
----------
f'er'ew'
(1 row)
atlasdb=#
atlasdb=# select q'1dsfwwe1';
?column?
----------
dsfwwe
(1 row)
atlasdb=#
atlasdb=# select q'!ffe'see!';
?column?
----------
ffe'see
(1 row)
