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use crate::oracle::types::OciDataType;
/// A unserialized value as received from the database
#[derive(Debug, Clone)]
pub struct OracleValue<'a> {
pub(crate) inner: InnerValue<'a>,
}
#[derive(Debug, Clone)]
pub(crate) enum InnerValue<'a> {
Raw {
raw_value: &'a oracle::SqlValue<'a>,
tpe: oracle::sql_type::OracleType,
},
SmallInt(i16),
Integer(i32),
BigInt(i64),
Float(f32),
Double(f64),
Text(String),
Binary(Vec<u8>),
#[cfg(feature = "chrono")]
Date(chrono_time::NaiveDate),
#[cfg(feature = "chrono")]
Timestamp(chrono_time::NaiveDateTime),
}
impl<'a> OracleValue<'a> {
pub(crate) fn new(raw_value: &'a oracle::SqlValue, tpe: oracle::sql_type::OracleType) -> Self {
Self {
inner: InnerValue::Raw { raw_value, tpe },
}
}
/// Get the datatype of the underlying value
pub fn value_type(&self) -> OciDataType {
use self::InnerValue::*;
match self.inner {
SmallInt(_) => OciDataType::SmallInt,
Integer(_) => OciDataType::Integer,
BigInt(_) => OciDataType::BigInt,
Float(_) => OciDataType::Float,
Double(_) => OciDataType::Double,
Text(_) => OciDataType::Text,
Binary(_) => OciDataType::Binary,
#[cfg(feature = "chrono")]
Date(_) => OciDataType::Date,
#[cfg(feature = "chrono")]
Timestamp(_) => OciDataType::Timestamp,
Raw {
tpe: oracle::sql_type::OracleType::Varchar2(_),
..
} => OciDataType::Text,
Raw {
tpe: oracle::sql_type::OracleType::NVarchar2(_),
..
} => OciDataType::Text,
Raw {
tpe: oracle::sql_type::OracleType::Char(_),
..
} => OciDataType::Text,
Raw {
tpe: oracle::sql_type::OracleType::NChar(_),
..
} => OciDataType::Text,
Raw {
tpe: oracle::sql_type::OracleType::BinaryFloat,
..
} => OciDataType::Float,
Raw {
tpe: oracle::sql_type::OracleType::BinaryDouble,
..
} => OciDataType::Double,
// Map number(prec, scale) to various integer types
// For any scale <= 0 we apply the following mapping
//
// Scale -127 seems to be used to indicate that no scale has
// been set
//
// *, 0 -> Unbound == Equal to 38 -> BigInt
// 1..=5 -> SmallInt
// 6..=10 -> Int,
// 11..=38 -> BigInt
//
// Technically anything larger than prec == 19 won't fit
// into a i64, we map it that way anyway as using NUMBER(*, scale)
// is common as integer primary key
//
// https://docs.oracle.com/cd/B28359_01/server.111/b28318/datatype.htm#CNCPT1834
Raw {
tpe: oracle::sql_type::OracleType::Number(prec, scale),
..
} if (1..=5).contains(&prec) && (-126..=0).contains(&scale) => OciDataType::SmallInt,
Raw {
tpe: oracle::sql_type::OracleType::Number(prec, scale),
..
} if (6..=10).contains(&prec) && (-126..=0).contains(&scale) => OciDataType::Integer,
Raw {
tpe: oracle::sql_type::OracleType::Number(_prec, scale),
..
} if (-126..=0).contains(&scale) => OciDataType::BigInt,
// If we did not map NUMBER to an integer above, we just
// use a double value
Raw {
tpe: oracle::sql_type::OracleType::Number(_prec, _scale),
..
} => OciDataType::Double,
Raw {
// same as NUMBER(prec, *)
tpe: oracle::sql_type::OracleType::Float(_),
..
} => OciDataType::Double,
Raw {
tpe: oracle::sql_type::OracleType::Date,
..
} => OciDataType::Date,
Raw {
tpe: oracle::sql_type::OracleType::Timestamp(_),
..
} => OciDataType::Timestamp,
Raw {
tpe: oracle::sql_type::OracleType::CLOB,
..
} => OciDataType::Text,
Raw {
tpe: oracle::sql_type::OracleType::BLOB,
..
} => OciDataType::Binary,
Raw {
tpe: oracle::sql_type::OracleType::Int64,
..
} => OciDataType::BigInt,
Raw {
tpe: oracle::sql_type::OracleType::UInt64,
..
} => OciDataType::BigInt,
Raw {
tpe: oracle::sql_type::OracleType::BFILE,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::NCLOB,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::RefCursor,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Boolean,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Object(_),
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Long,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::LongRaw,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::TimestampTZ(_),
..
}
| Raw {
tpe: oracle::sql_type::OracleType::TimestampLTZ(_),
..
}
| Raw {
tpe: oracle::sql_type::OracleType::IntervalDS(_, _),
..
}
| Raw {
tpe: oracle::sql_type::OracleType::IntervalYM(_),
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Rowid,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Raw(_),
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Json,
..
}
| Raw {
tpe: oracle::sql_type::OracleType::Xml,
..
} => unimplemented!(),
// e =>
// {
// #[cfg(feature = "chrono")]
// match e {
// Date(_) => OciDataType::Date,
// Timestamp(_) => OciDataType::Timestamp,
// _ => unreachable!(),
// }
// }
}
}
}