Task LAV-3305: Streamlit RENAME and UNDROP (#3697)

* Task LAV-3302: STREAMLIT catalog object — CREATE (FROM / ROOT_LOCATION forms), DROP, GRANT/REVOKE

Metadata-only schema-level STREAMLIT: parser support for both CREATE forms
and DROP [IF EXISTS], a store table persisting every documented property plus
a generated url_id, stage / MAIN_FILE validation, creator OWNERSHIP and future
grants on create, grant object-kind wiring (USAGE/MONITOR/EMBED/ALL, ON ALL
row counting, OWNERSHIP 391811, invalid privilege 003008). 090106 is emitted
bare, per the recorded snapshot.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Task LAV-3305: ALTER STREAMLIT RENAME TO and UNDROP STREAMLIT

Rename moves the store row (url_id, created_at, properties kept) and its
grants; UNDROP restores the newest dropped generation plus the grants its
DROP soft-deleted. Stacked on LAV-3302's Streamlit catalog commit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* task LAV-3305: fix CI — resource-index site tests no longer sample a live only-xfail clause

Implementing CREATE STREAMLIT ... ROOT_LOCATION scored the clause supported,
breaking the live-site sample LAV-3295 had just moved there. No parameter
cell in the repo is only-xfail any more, so pin the st-only-xfail rendering
in the synthetic syntax and parameter render tests instead of chasing a
live sample each time a feature lands. Scoring of ONLY_XFAIL stays covered
by test_syntax_support.py / test_syntax_parameters.py.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Wojciech Padło <wojciech.padlo@localstack.cloud>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: 3 people

src/ast/mod.rs

@@ -6228,6 +6228,17 @@ pub enum Statement {
         options: Vec<SqlOption>,
     },
     /// ```sql
+    /// ALTER STREAMLIT [ IF EXISTS ] <name> RENAME TO <new_name>
+    /// ```
+    AlterStreamlit {
+        /// `IF EXISTS` flag.
+        if_exists: bool,
+        /// Streamlit name.
+        name: ObjectName,
+        /// The alter operation.
+        operation: AlterStreamlitOperation,
+    },
+    /// ```sql
     /// DROP STREAMLIT [ IF EXISTS ] <name>
     /// ```
     DropStreamlit {
@@ -9839,6 +9850,15 @@ impl fmt::Display for Statement {
                 }
                 Ok(())
             }
+            Statement::AlterStreamlit {
+                if_exists,
+                name,
+                operation,
+            } => write!(
+                f,
+                "ALTER STREAMLIT {if_exists}{name} {operation}",
+                if_exists = if *if_exists { "IF EXISTS " } else { "" },
+            ),
             Statement::DropStreamlit { if_exists, name } => {
                 write!(
                     f,
@@ -12942,6 +12962,9 @@ pub enum ObjectType {
     /// An alert (Snowflake).
     /// <https://docs.snowflake.com/en/sql-reference/sql/drop-alert>
     Alert,
+    /// A Streamlit app (Snowflake).
+    /// <https://docs.snowflake.com/en/sql-reference/sql/undrop-streamlit>
+    Streamlit,
 }
 
 impl fmt::Display for ObjectType {
@@ -12967,6 +12990,7 @@ impl fmt::Display for ObjectType {
             ObjectType::Task => "TASK",
             ObjectType::Pipe => "PIPE",
             ObjectType::Alert => "ALERT",
+            ObjectType::Streamlit => "STREAMLIT",
         })
     }
 }
@@ -15691,6 +15715,23 @@ impl fmt::Display for AlterExternalVolumeOperation {
     }
 }
 
+/// Operations for `ALTER STREAMLIT`.
+#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "visitor", derive(Visit, VisitMut))]
+pub enum AlterStreamlitOperation {
+    /// `RENAME TO <new_name>`
+    RenameTo(ObjectName),
+}
+
+impl fmt::Display for AlterStreamlitOperation {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            AlterStreamlitOperation::RenameTo(name) => write!(f, "RENAME TO {name}"),
+        }
+    }
+}
+
 /// Operations for `ALTER FILE FORMAT`.
 #[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]

src/ast/spans.rs

@@ -635,6 +635,7 @@ impl Spanned for Statement {
             Statement::DropSnowflakeSecret { .. } => Span::empty(),
             Statement::CreateStreamlit { .. } => Span::empty(),
             Statement::DropStreamlit { .. } => Span::empty(),
+            Statement::AlterStreamlit { .. } => Span::empty(),
             Statement::DescribeSnowflakeSecret { .. } => Span::empty(),
             Statement::ShowSnowflakeSecrets { .. } => Span::empty(),
             Statement::CreateSnowflakeIndex { .. } => Span::empty(),

src/dialect/snowflake.rs

@@ -29,7 +29,7 @@ use crate::ast::helpers::stmt_data_loading::{
 use crate::ast::{
     visit_expressions,
     AlterAlertOperation, AlterBackupPolicyOperation, AlterColumnOperation,
-    AlterExternalVolumeOperation, AlterFileFormatOperation, AlterMaskingPolicyOperation,
+    AlterExternalVolumeOperation, AlterFileFormatOperation, AlterStreamlitOperation, AlterMaskingPolicyOperation,
     AlterAuthenticationPolicyOperation, AlterDatabaseRoleOperation, AlterNetworkRuleOperation,
     AlterPasswordPolicyOperation, AlterRoleOperation, AlterSemanticViewOperation,
     AlterSessionPolicyOperation, AlterSnowflakeSecretOperation,
@@ -245,6 +245,10 @@ impl SnowflakeDialect {
             return Some(parse_alter_procedure(parser));
         }
 
+        if parser.parse_keywords(&[Keyword::ALTER, Keyword::STREAMLIT]) {
+            return Some(parse_alter_streamlit(parser));
+        }
+
         if parser.parse_keywords(&[Keyword::ALTER, Keyword::FILE, Keyword::FORMAT]) {
             // ALTER FILE FORMAT
             return Some(parse_alter_file_format(parser));
@@ -6231,6 +6235,19 @@ fn parse_create_streamlit(or_replace: bool, parser: &mut Parser) -> Result<State
     })
 }
 
+/// Parse `ALTER STREAMLIT [IF EXISTS] <name> RENAME TO <new_name>`.
+fn parse_alter_streamlit(parser: &mut Parser) -> Result<Statement, ParserError> {
+    let if_exists = parser.parse_keywords(&[Keyword::IF, Keyword::EXISTS]);
+    let name = parser.parse_object_name(false)?;
+    parser.expect_keywords(&[Keyword::RENAME, Keyword::TO])?;
+    let operation = AlterStreamlitOperation::RenameTo(parser.parse_object_name(false)?);
+    Ok(Statement::AlterStreamlit {
+        if_exists,
+        name,
+        operation,
+    })
+}
+
 /// Parse `DROP STREAMLIT [IF EXISTS] <name>`.
 fn parse_drop_streamlit(parser: &mut Parser) -> Result<Statement, ParserError> {
     let if_exists = parser.parse_keywords(&[Keyword::IF, Keyword::EXISTS]);

src/parser/mod.rs

@@ -8712,9 +8712,11 @@ impl<'a> Parser<'a> {
             ObjectType::Alert
         } else if self.parse_keyword(Keyword::STAGE) {
             ObjectType::Stage
+        } else if self.parse_keyword(Keyword::STREAMLIT) {
+            ObjectType::Streamlit
         } else {
             return self.expected_ref(
-                "ACCOUNT, ALERT, DATABASE, DYNAMIC TABLE, SCHEMA, STAGE, TABLE or VIEW after UNDROP",
+                "ACCOUNT, ALERT, DATABASE, DYNAMIC TABLE, SCHEMA, STAGE, STREAMLIT, TABLE or VIEW after UNDROP",
                 self.peek_token_ref(),
             );
         };