snowflake: add support for TRANSIENT keyword (#807)

* snowflake: add support for TRANSIENT keyword

Signed-off-by: Maciej Obuchowski <obuchowski.maciej@gmail.com>

* fix clippy

---------

Signed-off-by: Maciej Obuchowski <obuchowski.maciej@gmail.com>
Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

src/ast/helpers/stmt_create_table.rs

@@ -50,6 +50,7 @@ pub struct CreateTableBuilder {
     pub external: bool,
     pub global: Option<bool>,
     pub if_not_exists: bool,
+    pub transient: bool,
     pub name: ObjectName,
     pub columns: Vec<ColumnDef>,
     pub constraints: Vec<TableConstraint>,
@@ -78,6 +79,7 @@ impl CreateTableBuilder {
             external: false,
             global: None,
             if_not_exists: false,
+            transient: false,
             name,
             columns: vec![],
             constraints: vec![],
@@ -123,6 +125,11 @@ impl CreateTableBuilder {
         self
     }
 
+    pub fn transient(mut self, transient: bool) -> Self {
+        self.transient = transient;
+        self
+    }
+
     pub fn columns(mut self, columns: Vec<ColumnDef>) -> Self {
         self.columns = columns;
         self
@@ -213,6 +220,7 @@ impl CreateTableBuilder {
             external: self.external,
             global: self.global,
             if_not_exists: self.if_not_exists,
+            transient: self.transient,
             name: self.name,
             columns: self.columns,
             constraints: self.constraints,
@@ -248,6 +256,7 @@ impl TryFrom<Statement> for CreateTableBuilder {
                 external,
                 global,
                 if_not_exists,
+                transient,
                 name,
                 columns,
                 constraints,
@@ -272,6 +281,7 @@ impl TryFrom<Statement> for CreateTableBuilder {
                 external,
                 global,
                 if_not_exists,
+                transient,
                 name,
                 columns,
                 constraints,

src/ast/mod.rs

@@ -1232,6 +1232,7 @@ pub enum Statement {
         external: bool,
         global: Option<bool>,
         if_not_exists: bool,
+        transient: bool,
         /// Table name
         #[cfg_attr(feature = "visitor", visit(with = "visit_relation"))]
         name: ObjectName,
@@ -2034,6 +2035,7 @@ impl fmt::Display for Statement {
                 with_options,
                 or_replace,
                 if_not_exists,
+                transient,
                 hive_distribution,
                 hive_formats,
                 external,
@@ -2060,7 +2062,7 @@ impl fmt::Display for Statement {
                 //   `CREATE TABLE t (a INT) AS SELECT a from t2`
                 write!(
                     f,
-                    "CREATE {or_replace}{external}{global}{temporary}TABLE {if_not_exists}{name}",
+                    "CREATE {or_replace}{external}{global}{temporary}{transient}TABLE {if_not_exists}{name}",
                     or_replace = if *or_replace { "OR REPLACE " } else { "" },
                     external = if *external { "EXTERNAL " } else { "" },
                     global = global
@@ -2074,6 +2076,7 @@ impl fmt::Display for Statement {
                         .unwrap_or(""),
                     if_not_exists = if *if_not_exists { "IF NOT EXISTS " } else { "" },
                     temporary = if *temporary { "TEMPORARY " } else { "" },
+                    transient = if *transient { "TRANSIENT " } else { "" },
                     name = name,
                 )?;
                 if let Some(on_cluster) = on_cluster {

src/keywords.rs

@@ -570,6 +570,7 @@ define_keywords!(
     TOP,
     TRAILING,
     TRANSACTION,
+    TRANSIENT,
     TRANSLATE,
     TRANSLATE_REGEX,
     TRANSLATION,

src/parser.rs

@@ -2266,6 +2266,7 @@ impl<'a> Parser<'a> {
         let or_replace = self.parse_keywords(&[Keyword::OR, Keyword::REPLACE]);
         let local = self.parse_one_of_keywords(&[Keyword::LOCAL]).is_some();
         let global = self.parse_one_of_keywords(&[Keyword::GLOBAL]).is_some();
+        let transient = self.parse_one_of_keywords(&[Keyword::TRANSIENT]).is_some();
         let global: Option<bool> = if global {
             Some(true)
         } else if local {
@@ -2277,7 +2278,7 @@ impl<'a> Parser<'a> {
             .parse_one_of_keywords(&[Keyword::TEMP, Keyword::TEMPORARY])
             .is_some();
         if self.parse_keyword(Keyword::TABLE) {
-            self.parse_create_table(or_replace, temporary, global)
+            self.parse_create_table(or_replace, temporary, global, transient)
         } else if self.parse_keyword(Keyword::MATERIALIZED) || self.parse_keyword(Keyword::VIEW) {
             self.prev_token();
             self.parse_create_view(or_replace)
@@ -3248,6 +3249,7 @@ impl<'a> Parser<'a> {
         or_replace: bool,
         temporary: bool,
         global: Option<bool>,
+        transient: bool,
     ) -> Result<Statement, ParserError> {
         let if_not_exists = self.parse_keywords(&[Keyword::IF, Keyword::NOT, Keyword::EXISTS]);
         let table_name = self.parse_object_name()?;
@@ -3352,6 +3354,7 @@ impl<'a> Parser<'a> {
             .table_properties(table_properties)
             .or_replace(or_replace)
             .if_not_exists(if_not_exists)
+            .transient(transient)
             .hive_distribution(hive_distribution)
             .hive_formats(Some(hive_formats))
             .global(global)

tests/sqlparser_snowflake.rs

@@ -34,6 +34,20 @@ fn test_snowflake_create_table() {
     }
 }
 
+#[test]
+fn test_snowflake_create_transient_table() {
+    let sql = "CREATE TRANSIENT TABLE CUSTOMER (id INT, name VARCHAR(255))";
+    match snowflake_and_generic().verified_stmt(sql) {
+        Statement::CreateTable {
+            name, transient, ..
+        } => {
+            assert_eq!("CUSTOMER", name.to_string());
+            assert!(transient)
+        }
+        _ => unreachable!(),
+    }
+}
+
 #[test]
 fn test_snowflake_single_line_tokenize() {
     let sql = "CREATE TABLE# this is a comment \ntable_1";