Support dialect-specific auto-increment column options for MySQL and SQLite (#234)

In MySQL it's AUTO_INCREMENT
(see https://dev.mysql.com/doc/refman/8.0/en/create-table.html)
and in SQLite it's AUTOINCREMENT.

We use `ColumnOption::DialectSpecific(Vec<Token>)` to avoid adding a new variant for each vendor-specific column option.

CHANGELOG.md

@@ -11,6 +11,9 @@ Check https://github.com/ballista-compute/sqlparser-rs/commits/main for undocume
 ### Changed
 
 ### Added
+- Support `CREATE OR REPLACE VIEW`/`TABLE` (#239)  - thanks @Dandandan!
+- Support PostgreSQL `PREPARE`, `EXECUTE`, and `DEALLOCATE` (#243) - thanks @silathdiir!
+- Support SQLite `AUTOINCREMENT` and MySQL `AUTO_INCREMENT` column option in `CREATE TABLE` - thanks @mashuai!
 
 ### Fixed
 

src/ast/ddl.rs

@@ -13,6 +13,8 @@
 //! AST types specific to CREATE/ALTER variants of [Statement]
 //! (commonly referred to as Data Definition Language, or DDL)
 use super::{display_comma_separated, DataType, Expr, Ident, ObjectName};
+use crate::ast::display_separated;
+use crate::tokenizer::Token;
 #[cfg(feature = "serde")]
 use serde::{Deserialize, Serialize};
 use std::fmt;
@@ -212,8 +214,12 @@ pub enum ColumnOption {
         on_delete: Option<ReferentialAction>,
         on_update: Option<ReferentialAction>,
     },
-    // `CHECK (<expr>)`
+    /// `CHECK (<expr>)`
     Check(Expr),
+    /// Dialect-specific options, such as:
+    /// - MySQL's `AUTO_INCREMENT` or SQLite's `AUTOINCREMENT`
+    /// - ...
+    DialectSpecific(Vec<Token>),
 }
 
 impl fmt::Display for ColumnOption {
@@ -245,6 +251,7 @@ impl fmt::Display for ColumnOption {
                 Ok(())
             }
             Check(expr) => write!(f, "CHECK ({})", expr),
+            DialectSpecific(val) => write!(f, "{}", display_separated(val, " ")),
         }
     }
 }

src/dialect/keywords.rs

@@ -23,6 +23,8 @@
 ///     and could be removed.
 /// 3) a `RESERVED_FOR_TABLE_ALIAS` array with keywords reserved in a
 /// "table alias" context.
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 
 /// Defines a string constant for a single keyword: `kw_def!(SELECT);`
 /// expands to `pub const SELECT = "SELECT";`
@@ -41,7 +43,8 @@ macro_rules! define_keywords {
     ($(
         $ident:ident $(= $string_keyword:expr)?
     ),*) => {
-        #[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Ord)]
+        #[derive(Debug, Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Hash)]
+        #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
         #[allow(non_camel_case_types)]
         pub enum Keyword {
             NoKeyword,
@@ -84,6 +87,8 @@ define_keywords!(
     AT,
     ATOMIC,
     AUTHORIZATION,
+    AUTOINCREMENT,
+    AUTO_INCREMENT,
     AVG,
     AVRO,
     BEGIN,

src/parser.rs

@@ -1283,6 +1283,12 @@ impl Parser {
             let expr = self.parse_expr()?;
             self.expect_token(&Token::RParen)?;
             ColumnOption::Check(expr)
+        } else if self.parse_keyword(Keyword::AUTO_INCREMENT) {
+            // Support AUTO_INCREMENT for MySQL
+            ColumnOption::DialectSpecific(vec![Token::make_keyword("AUTO_INCREMENT")])
+        } else if self.parse_keyword(Keyword::AUTOINCREMENT) {
+            // Support AUTOINCREMENT for SQLite
+            ColumnOption::DialectSpecific(vec![Token::make_keyword("AUTOINCREMENT")])
         } else {
             return self.expected("column option", self.peek_token());
         };

src/tokenizer.rs

@@ -21,10 +21,13 @@ use std::str::Chars;
 
 use super::dialect::keywords::{Keyword, ALL_KEYWORDS, ALL_KEYWORDS_INDEX};
 use super::dialect::Dialect;
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 use std::fmt;
 
 /// SQL Token enumeration
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum Token {
     /// An end-of-file marker, not a real token
     EOF,
@@ -160,7 +163,8 @@ impl Token {
 }
 
 /// A keyword (like SELECT) or an optionally quoted SQL identifier
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Word {
     /// The value of the token, without the enclosing quotes, and with the
     /// escape sequences (if any) processed (TODO: escapes are not handled)
@@ -196,7 +200,8 @@ impl Word {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum Whitespace {
     Space,
     Newline,

tests/sqlparser_mysql.rs

@@ -18,6 +18,7 @@
 use sqlparser::ast::*;
 use sqlparser::dialect::{GenericDialect, MySqlDialect};
 use sqlparser::test_utils::*;
+use sqlparser::tokenizer::Token;
 
 #[test]
 fn parse_identifiers() {
@@ -97,6 +98,37 @@ fn parse_show_columns() {
     }
 }
 
+#[test]
+fn parse_create_table_auto_increment() {
+    let sql = "CREATE TABLE foo (bar INT PRIMARY KEY AUTO_INCREMENT)";
+    match mysql().verified_stmt(sql) {
+        Statement::CreateTable { name, columns, .. } => {
+            assert_eq!(name.to_string(), "foo");
+            assert_eq!(
+                vec![ColumnDef {
+                    name: "bar".into(),
+                    data_type: DataType::Int,
+                    collation: None,
+                    options: vec![
+                        ColumnOptionDef {
+                            name: None,
+                            option: ColumnOption::Unique { is_primary: true }
+                        },
+                        ColumnOptionDef {
+                            name: None,
+                            option: ColumnOption::DialectSpecific(vec![Token::make_keyword(
+                                "AUTO_INCREMENT"
+                            )])
+                        }
+                    ],
+                }],
+                columns
+            );
+        }
+        _ => unreachable!(),
+    }
+}
+
 fn mysql() -> TestedDialects {
     TestedDialects {
         dialects: vec![Box::new(MySqlDialect {})],

tests/sqlparser_sqlite.rs

@@ -17,6 +17,7 @@
 use sqlparser::ast::*;
 use sqlparser::dialect::GenericDialect;
 use sqlparser::test_utils::*;
+use sqlparser::tokenizer::Token;
 
 #[test]
 fn parse_create_table_without_rowid() {
@@ -55,6 +56,37 @@ fn parse_create_virtual_table() {
     sqlite_and_generic().verified_stmt(sql);
 }
 
+#[test]
+fn parse_create_table_auto_increment() {
+    let sql = "CREATE TABLE foo (bar INT PRIMARY KEY AUTOINCREMENT)";
+    match sqlite_and_generic().verified_stmt(sql) {
+        Statement::CreateTable { name, columns, .. } => {
+            assert_eq!(name.to_string(), "foo");
+            assert_eq!(
+                vec![ColumnDef {
+                    name: "bar".into(),
+                    data_type: DataType::Int,
+                    collation: None,
+                    options: vec![
+                        ColumnOptionDef {
+                            name: None,
+                            option: ColumnOption::Unique { is_primary: true }
+                        },
+                        ColumnOptionDef {
+                            name: None,
+                            option: ColumnOption::DialectSpecific(vec![Token::make_keyword(
+                                "AUTOINCREMENT"
+                            )])
+                        }
+                    ],
+                }],
+                columns
+            );
+        }
+        _ => unreachable!(),
+    }
+}
+
 fn sqlite_and_generic() -> TestedDialects {
     TestedDialects {
         // we don't have a separate SQLite dialect, so test only the generic dialect for now