xanderbailey commented on code in PR #20813:
URL: https://github.com/apache/datafusion/pull/20813#discussion_r3092349203
##########
datafusion/common/src/parsers.rs:
##########
@@ -73,3 +73,48 @@ impl CompressionTypeVariant {
!matches!(self, &Self::UNCOMPRESSED)
}
}
+
+/// CSV quote style
+///
+/// Controls when fields are quoted when writing CSV files.
+/// Corresponds to [`arrow::csv::QuoteStyle`].
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
+pub enum CsvQuoteStyle {
+ /// Quote all fields
+ Always,
+ /// Only quote fields when necessary (default)
+ #[default]
+ Necessary,
+ /// Quote all non-numeric fields
+ NonNumeric,
+ /// Never quote fields
+ Never,
+}
+
+impl FromStr for CsvQuoteStyle {
+ type Err = DataFusionError;
+
+ fn from_str(s: &str) -> Result<Self, Self::Err> {
+ match s {
+ "Always" | "ALWAYS" | "always" => Ok(Self::Always),
+ "Necessary" | "NECESSARY" | "necessary" | "" =>
Ok(Self::Necessary),
+ "NonNumeric" | "NON_NUMERIC" | "nonnumeric" =>
Ok(Self::NonNumeric),
+ "Never" | "NEVER" | "never" => Ok(Self::Never),
+ _ => Err(DataFusionError::NotImplemented(format!(
+ "Unsupported CSV quote style {s}"
+ ))),
+ }
Review Comment:
Spark just has `quoteAll` which maps to `always` so I have removed the empty
string.
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