morningman commented on code in PR #17369:
URL: https://github.com/apache/doris/pull/17369#discussion_r1126215691
##########
be/src/vec/exec/format/csv/csv_reader.cpp:
##########
@@ -462,8 +462,22 @@ void
CsvReader::_split_line_for_single_char_delimiter(const Slice& line) {
size_t cur_pos = 0;
size_t start_field = 0;
const size_t size = line.size;
+ bool quoted = false;
+
for (; cur_pos < size; ++cur_pos) {
- if (*(value + cur_pos) == _value_separator[0]) {
+ if (_trim_double_quotes && *(value + cur_pos) == '\"') {
+ if (cur_pos == start_field) {
+ // start_field is ", mark quoted true
+ quoted = true;
+ } else if (*(value + cur_pos - 1) != '\\' && quoted) {
+ // cur_pos is ", mark quoted finished
+ quoted = !quoted;
+ }
+ continue;
+ } else if (_trim_double_quotes && quoted) {
Review Comment:
Better leave `_split_line_for_single_char_delimiter` fast enough to not
handle this complex situation.
Maybe we should be a new parameter to specify the `escape` explicitly.
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