github.com/matrixorigin/matrixone@v1.2.0/test/distributed/resources/load_data/char_varchar_3.csv (about)

     1  "aa"",aa","bb"",bb","cc"",cc","dd"",dd"
     2  "aa""",aa","bb""",bb","cc""",cc","dd""",dd"
     3  "aa"""",aa","bb"""",bb","cc"""",cc","dd"""",dd"
     4  "aa""""",aa","bb"""",bb","cc"""",cc","dd"""",dd"