feat: support more Postgres index syntax (#943)

src/ast/mod.rs

@@ -1348,13 +1348,17 @@ pub enum Statement {
     /// CREATE INDEX
     CreateIndex {
         /// index name
-        name: ObjectName,
+        name: Option<ObjectName>,
         #[cfg_attr(feature = "visitor", visit(with = "visit_relation"))]
         table_name: ObjectName,
         using: Option<Ident>,
         columns: Vec<OrderByExpr>,
         unique: bool,
+        concurrently: bool,
         if_not_exists: bool,
+        include: Vec<Ident>,
+        nulls_distinct: Option<bool>,
+        predicate: Option<Expr>,
     },
     /// CREATE ROLE
     /// See [postgres](https://www.postgresql.org/docs/current/sql-createrole.html)
@@ -2464,20 +2468,41 @@ impl fmt::Display for Statement {
                 using,
                 columns,
                 unique,
+                concurrently,
                 if_not_exists,
+                include,
+                nulls_distinct,
+                predicate,
             } => {
                 write!(
                     f,
-                    "CREATE {unique}INDEX {if_not_exists}{name} ON {table_name}",
+                    "CREATE {unique}INDEX {concurrently}{if_not_exists}",
                     unique = if *unique { "UNIQUE " } else { "" },
+                    concurrently = if *concurrently { "CONCURRENTLY " } else { "" },
                     if_not_exists = if *if_not_exists { "IF NOT EXISTS " } else { "" },
-                    name = name,
-                    table_name = table_name
                 )?;
+                if let Some(value) = name {
+                    write!(f, "{value} ")?;
+                }
+                write!(f, "ON {table_name}")?;
                 if let Some(value) = using {
                     write!(f, " USING {value} ")?;
                 }
-                write!(f, "({})", display_separated(columns, ","))
+                write!(f, "({})", display_separated(columns, ","))?;
+                if !include.is_empty() {
+                    write!(f, " INCLUDE ({})", display_separated(include, ","))?;
+                }
+                if let Some(value) = nulls_distinct {
+                    if *value {
+                        write!(f, " NULLS DISTINCT")?;
+                    } else {
+                        write!(f, " NULLS NOT DISTINCT")?;
+                    }
+                }
+                if let Some(predicate) = predicate {
+                    write!(f, " WHERE {predicate}")?;
+                }
+                Ok(())
             }
             Statement::CreateRole {
                 names,

src/keywords.rs

@@ -153,6 +153,7 @@ define_keywords!(
     COMMITTED,
     COMPRESSION,
     COMPUTE,
+    CONCURRENTLY,
     CONDITION,
     CONFLICT,
     CONNECT,
@@ -310,6 +311,7 @@ define_keywords!(
     ILIKE,
     IMMUTABLE,
     IN,
+    INCLUDE,
     INCREMENT,
     INDEX,
     INDICATOR,

src/parser/mod.rs

@@ -3370,9 +3370,15 @@ impl<'a> Parser<'a> {
     }
 
     pub fn parse_create_index(&mut self, unique: bool) -> Result<Statement, ParserError> {
+        let concurrently = self.parse_keyword(Keyword::CONCURRENTLY);
         let if_not_exists = self.parse_keywords(&[Keyword::IF, Keyword::NOT, Keyword::EXISTS]);
-        let index_name = self.parse_object_name()?;
-        self.expect_keyword(Keyword::ON)?;
+        let index_name = if if_not_exists || !self.parse_keyword(Keyword::ON) {
+            let index_name = self.parse_object_name()?;
+            self.expect_keyword(Keyword::ON)?;
+            Some(index_name)
+        } else {
+            None
+        };
         let table_name = self.parse_object_name()?;
         let using = if self.parse_keyword(Keyword::USING) {
             Some(self.parse_identifier()?)
@@ -3382,13 +3388,41 @@ impl<'a> Parser<'a> {
         self.expect_token(&Token::LParen)?;
         let columns = self.parse_comma_separated(Parser::parse_order_by_expr)?;
         self.expect_token(&Token::RParen)?;
+
+        let include = if self.parse_keyword(Keyword::INCLUDE) {
+            self.expect_token(&Token::LParen)?;
+            let columns = self.parse_comma_separated(Parser::parse_identifier)?;
+            self.expect_token(&Token::RParen)?;
+            columns
+        } else {
+            vec![]
+        };
+
+        let nulls_distinct = if self.parse_keyword(Keyword::NULLS) {
+            let not = self.parse_keyword(Keyword::NOT);
+            self.expect_keyword(Keyword::DISTINCT)?;
+            Some(!not)
+        } else {
+            None
+        };
+
+        let predicate = if self.parse_keyword(Keyword::WHERE) {
+            Some(self.parse_expr()?)
+        } else {
+            None
+        };
+
         Ok(Statement::CreateIndex {
             name: index_name,
             table_name,
             using,
             columns,
             unique,
+            concurrently,
             if_not_exists,
+            include,
+            nulls_distinct,
+            predicate,
         })
     }
 

tests/sqlparser_common.rs

@@ -5981,7 +5981,7 @@ fn parse_create_index() {
     ];
     match verified_stmt(sql) {
         Statement::CreateIndex {
-            name,
+            name: Some(name),
             table_name,
             columns,
             unique,
@@ -6015,19 +6015,25 @@ fn test_create_index_with_using_function() {
     ];
     match verified_stmt(sql) {
         Statement::CreateIndex {
-            name,
+            name: Some(name),
             table_name,
             using,
             columns,
             unique,
+            concurrently,
             if_not_exists,
+            include,
+            nulls_distinct: None,
+            predicate: None,
         } => {
             assert_eq!("idx_name", name.to_string());
             assert_eq!("test", table_name.to_string());
             assert_eq!("btree", using.unwrap().to_string());
             assert_eq!(indexed_columns, columns);
             assert!(unique);
-            assert!(if_not_exists)
+            assert!(!concurrently);
+            assert!(if_not_exists);
+            assert!(include.is_empty());
         }
         _ => unreachable!(),
     }

tests/sqlparser_postgres.rs

@@ -1761,6 +1761,208 @@ fn parse_array_index_expr() {
     );
 }
 
+#[test]
+fn parse_create_index() {
+    let sql = "CREATE INDEX IF NOT EXISTS my_index ON my_table(col1,col2)";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name: Some(ObjectName(name)),
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            nulls_distinct: None,
+            include,
+            predicate: None,
+        } => {
+            assert_eq_vec(&["my_index"], &name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(!concurrently);
+            assert!(if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert!(include.is_empty());
+        }
+        _ => unreachable!(),
+    }
+}
+
+#[test]
+fn parse_create_anonymous_index() {
+    let sql = "CREATE INDEX ON my_table(col1,col2)";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name,
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            include,
+            nulls_distinct: None,
+            predicate: None,
+        } => {
+            assert_eq!(None, name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(!concurrently);
+            assert!(!if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert!(include.is_empty());
+        }
+        _ => unreachable!(),
+    }
+}
+
+#[test]
+fn parse_create_index_concurrently() {
+    let sql = "CREATE INDEX CONCURRENTLY IF NOT EXISTS my_index ON my_table(col1,col2)";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name: Some(ObjectName(name)),
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            include,
+            nulls_distinct: None,
+            predicate: None,
+        } => {
+            assert_eq_vec(&["my_index"], &name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(concurrently);
+            assert!(if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert!(include.is_empty());
+        }
+        _ => unreachable!(),
+    }
+}
+
+#[test]
+fn parse_create_index_with_predicate() {
+    let sql = "CREATE INDEX IF NOT EXISTS my_index ON my_table(col1,col2) WHERE col3 IS NULL";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name: Some(ObjectName(name)),
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            include,
+            nulls_distinct: None,
+            predicate: Some(_),
+        } => {
+            assert_eq_vec(&["my_index"], &name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(!concurrently);
+            assert!(if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert!(include.is_empty());
+        }
+        _ => unreachable!(),
+    }
+}
+
+#[test]
+fn parse_create_index_with_include() {
+    let sql = "CREATE INDEX IF NOT EXISTS my_index ON my_table(col1,col2) INCLUDE (col3)";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name: Some(ObjectName(name)),
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            include,
+            nulls_distinct: None,
+            predicate: None,
+        } => {
+            assert_eq_vec(&["my_index"], &name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(!concurrently);
+            assert!(if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert_eq_vec(&["col3"], &include);
+        }
+        _ => unreachable!(),
+    }
+}
+
+#[test]
+fn parse_create_index_with_nulls_distinct() {
+    let sql = "CREATE INDEX IF NOT EXISTS my_index ON my_table(col1,col2) NULLS NOT DISTINCT";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name: Some(ObjectName(name)),
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            include,
+            nulls_distinct: Some(nulls_distinct),
+            predicate: None,
+        } => {
+            assert_eq_vec(&["my_index"], &name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(!concurrently);
+            assert!(if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert!(include.is_empty());
+            assert!(!nulls_distinct);
+        }
+        _ => unreachable!(),
+    }
+
+    let sql = "CREATE INDEX IF NOT EXISTS my_index ON my_table(col1,col2) NULLS DISTINCT";
+    match pg().verified_stmt(sql) {
+        Statement::CreateIndex {
+            name: Some(ObjectName(name)),
+            table_name: ObjectName(table_name),
+            using,
+            columns,
+            unique,
+            concurrently,
+            if_not_exists,
+            include,
+            nulls_distinct: Some(nulls_distinct),
+            predicate: None,
+        } => {
+            assert_eq_vec(&["my_index"], &name);
+            assert_eq_vec(&["my_table"], &table_name);
+            assert_eq!(None, using);
+            assert!(!unique);
+            assert!(!concurrently);
+            assert!(if_not_exists);
+            assert_eq_vec(&["col1", "col2"], &columns);
+            assert!(include.is_empty());
+            assert!(nulls_distinct);
+        }
+        _ => unreachable!(),
+    }
+}
+
 #[test]
 fn parse_array_subquery_expr() {
     let sql = "SELECT ARRAY(SELECT 1 UNION SELECT 2)";