Aitozi commented on code in PR #18: URL: https://github.com/apache/paimon-rust/pull/18#discussion_r1687981583
########## crates/paimon/src/spec/types.rs: ########## @@ -0,0 +1,985 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +use crate::error::Error; +use bitflags::bitflags; +use serde::{Deserialize, Serialize}; +use std::fmt::{Arguments, Display, Formatter}; +use std::str::FromStr; + +bitflags! { +/// An enumeration of Data type families for clustering {@link DataTypeRoot}s into categories. +/// +/// Impl Reference: <https://github.com/apache/paimon/blob/master/paimon-common/src/main/java/org/apache/paimon/types/DataTypeFamily.java> +#[derive(Debug, Clone, PartialEq, Eq)] + pub struct DataTypeFamily: u32 { + const PREDEFINED = 1 << 0; + const CONSTRUCTED = 1 << 1; + const CHARACTER_STRING = 1 << 2; + const BINARY_STRING = 1 << 3; + const NUMERIC = 1 << 4; + const INTEGER_NUMERIC = 1 << 5; + const EXACT_NUMERIC = 1 << 6; + const APPROXIMATE_NUMERIC = 1 << 7; + const DATETIME = 1 << 8; + const TIME = 1 << 9; + const TIMESTAMP = 1 << 10; + const COLLECTION = 1 << 11; + const EXTENSION = 1 << 12; + } +} + +/// The root of data type. +/// +/// Impl Reference: <https://github.com/apache/paimon/blob/db8bcd7fdd9c2705435d2ab1d2341c52d1f67ee5/paimon-common/src/main/java/org/apache/paimon/types/DataTypeRoot.java#L49> +#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize, Hash)] +pub enum DataTypeRoot { + Char, + Varchar, + Boolean, + Binary, + Varbinary, + Decimal, + Tinyint, + Smallint, + Integer, + Bigint, + Float, + Double, + Date, + TimeWithoutTimeZone, + TimestampWithoutTimeZone, + TimestampWithLocalTimeZone, + Array, + Multiset, + Map, + Row, +} + +impl DataTypeRoot { + pub fn families(&self) -> DataTypeFamily { + match self { + Self::Char => DataTypeFamily::PREDEFINED | DataTypeFamily::CHARACTER_STRING, + Self::Varchar => DataTypeFamily::PREDEFINED | DataTypeFamily::CHARACTER_STRING, + Self::Boolean => DataTypeFamily::PREDEFINED, + Self::Binary => DataTypeFamily::PREDEFINED | DataTypeFamily::BINARY_STRING, + Self::Varbinary => DataTypeFamily::PREDEFINED | DataTypeFamily::BINARY_STRING, + Self::Decimal => { + DataTypeFamily::PREDEFINED | DataTypeFamily::NUMERIC | DataTypeFamily::EXACT_NUMERIC + } + Self::Tinyint => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::NUMERIC + | DataTypeFamily::INTEGER_NUMERIC + | DataTypeFamily::EXACT_NUMERIC + } + Self::Smallint => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::NUMERIC + | DataTypeFamily::INTEGER_NUMERIC + | DataTypeFamily::EXACT_NUMERIC + } + Self::Integer => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::NUMERIC + | DataTypeFamily::INTEGER_NUMERIC + | DataTypeFamily::EXACT_NUMERIC + } + Self::Bigint => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::NUMERIC + | DataTypeFamily::INTEGER_NUMERIC + | DataTypeFamily::EXACT_NUMERIC + } + Self::Float => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::NUMERIC + | DataTypeFamily::APPROXIMATE_NUMERIC + } + Self::Double => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::NUMERIC + | DataTypeFamily::APPROXIMATE_NUMERIC + } + Self::Date => DataTypeFamily::PREDEFINED | DataTypeFamily::DATETIME, + Self::TimeWithoutTimeZone => { + DataTypeFamily::PREDEFINED | DataTypeFamily::DATETIME | DataTypeFamily::TIME + } + Self::TimestampWithoutTimeZone => { + DataTypeFamily::PREDEFINED | DataTypeFamily::DATETIME | DataTypeFamily::TIMESTAMP + } + Self::TimestampWithLocalTimeZone => { + DataTypeFamily::PREDEFINED + | DataTypeFamily::DATETIME + | DataTypeFamily::TIMESTAMP + | DataTypeFamily::EXTENSION + } + Self::Array => DataTypeFamily::CONSTRUCTED | DataTypeFamily::COLLECTION, + Self::Multiset => DataTypeFamily::CONSTRUCTED | DataTypeFamily::COLLECTION, + Self::Map => DataTypeFamily::CONSTRUCTED | DataTypeFamily::EXTENSION, + Self::Row => DataTypeFamily::CONSTRUCTED, + } + } +} + +/// A visitor that can visit different data types. +pub trait DataTypeVisitor<R> { + fn visit(&mut self, data_type: &DataType) -> R; +} + +/// Data type for paimon table. +/// +/// Impl Reference: <https://github.com/apache/paimon/blob/db8bcd7fdd9c2705435d2ab1d2341c52d1f67ee5/paimon-common/src/main/java/org/apache/paimon/types/DataType.java#L45> +#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize, Hash)] +pub struct DataType { + is_nullable: bool, + type_root: DataTypeRoot, +} + +impl Display for DataType { Review Comment: I think we should impl Display for the concrete types such as `BigIntType` not for the `DataType`? -- This is an automated message from the Apache Git Service. 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