github.com/matrixorigin/matrixone@v1.2.0/test/distributed/resources/load_data/char_varchar_5.csv (about)

     1  a?b?c?d
     2  "a"?"b"?"c"?"d"
     3  'a'?'b'?'c'?'d'
     4  "'a'"?"'b'"?"'c'"?"'d'"
     5  "aa?aa"?"bb?bb"?"cc?cc"?"dd?dd"
     6  "aa?"?"bb?"?"cc?"?"dd?"
     7  "aa???aa"?"bb???bb"?"cc???cc"?"dd???dd"
     8  "aa'?'??aa"?"bb'?'??bb"?"cc'?'??cc"?"dd'?'??dd"
     9  aa"aa?bb"bb?cc"cc?dd"dd
    10  "aa"aa"?"bb"bb"?"cc"cc"?"dd"dd"
    11  "aa""aa"?"bb""bb"?"cc""cc"?"dd""dd"
    12  "aa"""aa"?"bb"""bb"?"cc"""cc"?"dd"""dd"
    13  "aa""""aa"?"bb""""bb"?"cc""""cc"?"dd""""dd"
    14  "aa""?aa"?"bb""?bb"?"cc""?cc"?"dd""?dd"
    15  "aa""""?aa"?"bb""""?bb"?"cc""""?cc"?"dd""""?dd"
    16  ???
    17  ????
    18  ""?""?""?
    19  """"?""""?""""?""""
    20  """"""?""""""?""""""?""""""