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#[cfg(feature = "bigdecimal")]
use bigdecimal::BigDecimal;
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use std::fmt;
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub enum Value {
#[cfg(not(feature = "bigdecimal"))]
Number(String, bool),
#[cfg(feature = "bigdecimal")]
Number(BigDecimal, bool),
SingleQuotedString(String),
NationalStringLiteral(String),
HexStringLiteral(String),
DoubleQuotedString(String),
Boolean(bool),
Interval {
value: String,
leading_field: Option<DateTimeField>,
leading_precision: Option<u64>,
last_field: Option<DateTimeField>,
fractional_seconds_precision: Option<u64>,
},
Null,
}
impl fmt::Display for Value {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Value::Number(v, l) => write!(f, "{}{long}", v, long = if *l { "L" } else { "" }),
Value::DoubleQuotedString(v) => write!(f, "\"{}\"", v),
Value::SingleQuotedString(v) => write!(f, "'{}'", escape_single_quote_string(v)),
Value::NationalStringLiteral(v) => write!(f, "N'{}'", v),
Value::HexStringLiteral(v) => write!(f, "X'{}'", v),
Value::Boolean(v) => write!(f, "{}", v),
Value::Interval {
value,
leading_field: Some(DateTimeField::Second),
leading_precision: Some(leading_precision),
last_field,
fractional_seconds_precision: Some(fractional_seconds_precision),
} => {
assert!(last_field.is_none());
write!(
f,
"INTERVAL '{}' SECOND ({}, {})",
escape_single_quote_string(value),
leading_precision,
fractional_seconds_precision
)
}
Value::Interval {
value,
leading_field,
leading_precision,
last_field,
fractional_seconds_precision,
} => {
write!(f, "INTERVAL '{}'", escape_single_quote_string(value))?;
if let Some(leading_field) = leading_field {
write!(f, " {}", leading_field)?;
}
if let Some(leading_precision) = leading_precision {
write!(f, " ({})", leading_precision)?;
}
if let Some(last_field) = last_field {
write!(f, " TO {}", last_field)?;
}
if let Some(fractional_seconds_precision) = fractional_seconds_precision {
write!(f, " ({})", fractional_seconds_precision)?;
}
Ok(())
}
Value::Null => write!(f, "NULL"),
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub enum DateTimeField {
Year,
Month,
Day,
Hour,
Minute,
Second,
}
impl fmt::Display for DateTimeField {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(match self {
DateTimeField::Year => "YEAR",
DateTimeField::Month => "MONTH",
DateTimeField::Day => "DAY",
DateTimeField::Hour => "HOUR",
DateTimeField::Minute => "MINUTE",
DateTimeField::Second => "SECOND",
})
}
}
pub struct EscapeSingleQuoteString<'a>(&'a str);
impl<'a> fmt::Display for EscapeSingleQuoteString<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for c in self.0.chars() {
if c == '\'' {
write!(f, "\'\'")?;
} else {
write!(f, "{}", c)?;
}
}
Ok(())
}
}
pub fn escape_single_quote_string(s: &str) -> EscapeSingleQuoteString<'_> {
EscapeSingleQuoteString(s)
}