Derive PartialOrd, Ord, and Copy whenever possible (#717)

This allow other projects to use our structures inside others that need
those.

src/ast/data_type.rs

@@ -22,7 +22,7 @@ use crate::ast::ObjectName;
 use super::value::escape_single_quote_string;
 
 /// SQL data types
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum DataType {
     /// Fixed-length character type e.g. CHARACTER(10)
@@ -335,7 +335,7 @@ fn format_datetime_precision_and_tz(
 ///
 /// This is more related to a display information than real differences between each variant. To
 /// guarantee compatibility with the input query we must maintain its exact information.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum TimezoneInfo {
     /// No information about time zone. E.g., TIMESTAMP
@@ -382,7 +382,7 @@ impl fmt::Display for TimezoneInfo {
 /// following the 2016 [standard].
 ///
 /// [standard]: https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#exact-numeric-type
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ExactNumberInfo {
     /// No additional information e.g. `DECIMAL`
@@ -412,7 +412,7 @@ impl fmt::Display for ExactNumberInfo {
 /// Information about [character length][1], including length and possibly unit.
 ///
 /// [1]: https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#character-length
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct CharacterLength {
     /// Default (if VARYING) or maximum (if not VARYING) length
@@ -434,7 +434,7 @@ impl fmt::Display for CharacterLength {
 /// Possible units for characters, initially based on 2016 ANSI [standard][1].
 ///
 /// [1]: https://jakewheat.github.io/sql-overview/sql-2016-foundation-grammar.html#char-length-units
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum CharLengthUnits {
     /// CHARACTERS unit

src/ast/ddl.rs

@@ -25,7 +25,7 @@ use crate::ast::{display_comma_separated, display_separated, DataType, Expr, Ide
 use crate::tokenizer::Token;
 
 /// An `ALTER TABLE` (`Statement::AlterTable`) operation
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum AlterTableOperation {
     /// `ADD <table_constraint>`
@@ -201,7 +201,7 @@ impl fmt::Display for AlterTableOperation {
 }
 
 /// An `ALTER COLUMN` (`Statement::AlterTable`) operation
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum AlterColumnOperation {
     /// `SET NOT NULL`
@@ -244,7 +244,7 @@ impl fmt::Display for AlterColumnOperation {
 
 /// A table-level constraint, specified in a `CREATE TABLE` or an
 /// `ALTER TABLE ADD <constraint>` statement.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum TableConstraint {
     /// `[ CONSTRAINT <name> ] { PRIMARY KEY | UNIQUE } (<columns>)`
@@ -407,7 +407,7 @@ impl fmt::Display for TableConstraint {
 /// statements of `MySQL` [(1)].
 ///
 /// [1]: https://dev.mysql.com/doc/refman/8.0/en/create-table.html
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum KeyOrIndexDisplay {
     /// Nothing to display
@@ -442,7 +442,7 @@ impl fmt::Display for KeyOrIndexDisplay {
 /// [1]: https://dev.mysql.com/doc/refman/8.0/en/create-table.html
 /// [2]: https://dev.mysql.com/doc/refman/8.0/en/create-index.html
 /// [3]: https://www.postgresql.org/docs/14/sql-createindex.html
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum IndexType {
     BTree,
@@ -460,7 +460,7 @@ impl fmt::Display for IndexType {
 }
 
 /// SQL column definition
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct ColumnDef {
     pub name: Ident,
@@ -495,7 +495,7 @@ impl fmt::Display for ColumnDef {
 /// For maximum flexibility, we don't distinguish between constraint and
 /// non-constraint options, lumping them all together under the umbrella of
 /// "column options," and we allow any column option to be named.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct ColumnOptionDef {
     pub name: Option<Ident>,
@@ -510,7 +510,7 @@ impl fmt::Display for ColumnOptionDef {
 
 /// `ColumnOption`s are modifiers that follow a column definition in a `CREATE
 /// TABLE` statement.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ColumnOption {
     /// `NULL`
@@ -597,7 +597,7 @@ fn display_constraint_name(name: &'_ Option<Ident>) -> impl fmt::Display + '_ {
 /// { RESTRICT | CASCADE | SET NULL | NO ACTION | SET DEFAULT }`
 ///
 /// Used in foreign key constraints in `ON UPDATE` and `ON DELETE` options.
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[derive(Debug, Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ReferentialAction {
     Restrict,