feat(frontend): support SET TIME ZONE (risingwavelabs#8572)

Signed-off-by: TennyZhuang <zty0826@gmail.com>

src/common/src/session_config/mod.rs

@@ -24,6 +24,7 @@ use derivative::{self, Derivative};
 use itertools::Itertools;
 pub use query_mode::QueryMode;
 pub use search_path::{SearchPath, USER_NAME_WILD_CARD};
+use tracing::info;
 
 use crate::error::{ErrorCode, RwError};
 use crate::session_config::transaction_isolation_level::IsolationLevel;
@@ -357,6 +358,7 @@ pub struct ConfigMap {
 
 impl ConfigMap {
     pub fn set(&mut self, key: &str, val: Vec<String>) -> Result<(), RwError> {
+        info!(%key, ?val, "set config");
         let val = val.iter().map(AsRef::as_ref).collect_vec();
         if key.eq_ignore_ascii_case(ImplicitFlush::entry_name()) {
             self.implicit_flush = val.as_slice().try_into()?;

src/frontend/Cargo.toml

@@ -31,6 +31,7 @@ enum-as-inner = "0.5"
 fixedbitset = "0.4.1"
 futures = { version = "0.3", default-features = false, features = ["alloc"] }
 futures-async-stream = "0.2"
+iana-time-zone = "0.1"
 itertools = "0.10"
 lazy_static = "1"
 maplit = "1"

src/frontend/src/handler/mod.rs

@@ -28,6 +28,7 @@ use risingwave_common::error::{ErrorCode, Result};
 use risingwave_sqlparser::ast::*;
 
 use self::util::DataChunkToRowSetAdapter;
+use self::variable::handle_set_time_zone;
 use crate::scheduler::{DistributedQueryStream, LocalQueryStream};
 use crate::session::SessionImpl;
 use crate::utils::WithOptions;
@@ -351,6 +352,7 @@ pub async fn handle(
             variable,
             value,
         } => variable::handle_set(handler_args, variable, value),
+        Statement::SetTimeZone { local: _, value } => handle_set_time_zone(handler_args, value),
         Statement::ShowVariable { variable } => variable::handle_show(handler_args, variable).await,
         Statement::CreateIndex {
             name,

src/frontend/src/handler/variable.rs

@@ -16,9 +16,9 @@ use itertools::Itertools;
 use pgwire::pg_field_descriptor::PgFieldDescriptor;
 use pgwire::pg_response::{PgResponse, StatementType};
 use pgwire::types::Row;
-use risingwave_common::error::Result;
+use risingwave_common::error::{ErrorCode, Result};
 use risingwave_common::types::DataType;
-use risingwave_sqlparser::ast::{Ident, SetVariableValue, Value};
+use risingwave_sqlparser::ast::{Ident, SetTimeZoneValue, SetVariableValue, Value};
 
 use super::RwPgResponse;
 use crate::handler::HandlerArgs;
@@ -48,6 +48,25 @@ pub fn handle_set(
     Ok(PgResponse::empty_result(StatementType::SET_VARIABLE))
 }
 
+pub(super) fn handle_set_time_zone(
+    handler_args: HandlerArgs,
+    value: SetTimeZoneValue,
+) -> Result<RwPgResponse> {
+    let tz_info = match value {
+        SetTimeZoneValue::Local => iana_time_zone::get_timezone()
+            .map_err(|e| ErrorCode::InternalError(format!("Failed to get local time zone: {}", e))),
+        SetTimeZoneValue::Default => Ok("UTC".to_string()),
+        SetTimeZoneValue::Ident(ident) => Ok(ident.real_value()),
+        SetTimeZoneValue::Literal(Value::DoubleQuotedString(s))
+        | SetTimeZoneValue::Literal(Value::SingleQuotedString(s)) => Ok(s),
+        _ => Ok(value.to_string()),
+    }?;
+
+    handler_args.session.set_config("timezone", vec![tz_info])?;
+
+    Ok(PgResponse::empty_result(StatementType::SET_VARIABLE))
+}
+
 pub(super) async fn handle_show(
     handler_args: HandlerArgs,
     variable: Vec<Ident>,

src/sqlparser/src/ast/mod.rs

@@ -1041,6 +1041,11 @@ pub enum Statement {
         snapshot: Option<Value>,
         session: bool,
     },
+    /// `SET [ SESSION | LOCAL ] TIME ZONE { value | 'value' | LOCAL | DEFAULT }`
+    SetTimeZone {
+        local: bool,
+        value: SetTimeZoneValue,
+    },
     /// `COMMENT ON ...`
     ///
     /// Note: this is a PostgreSQL-specific statement.
@@ -1450,6 +1455,14 @@ impl fmt::Display for Statement {
                 }
                 Ok(())
             }
+            Statement::SetTimeZone { local, value } => {
+                write!(f, "SET")?;
+                if *local {
+                    write!(f, " LOCAL")?;
+                }
+                write!(f, " TIME ZONE {}", value)?;
+                Ok(())
+            }
             Statement::Commit { chain } => {
                 write!(f, "COMMIT{}", if *chain { " AND CHAIN" } else { "" },)
             }
@@ -1975,6 +1988,26 @@ impl fmt::Display for EmitMode {
     }
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum SetTimeZoneValue {
+    Ident(Ident),
+    Literal(Value),
+    Local,
+    Default,
+}
+
+impl fmt::Display for SetTimeZoneValue {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            SetTimeZoneValue::Ident(ident) => write!(f, "{}", ident),
+            SetTimeZoneValue::Literal(value) => write!(f, "{}", value),
+            SetTimeZoneValue::Local => f.write_str("LOCAL"),
+            SetTimeZoneValue::Default => f.write_str("DEFAULT"),
+        }
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum TransactionMode {

src/sqlparser/src/parser.rs

@@ -3282,6 +3282,23 @@ impl Parser {
 
     pub fn parse_set(&mut self) -> Result<Statement, ParserError> {
         let modifier = self.parse_one_of_keywords(&[Keyword::SESSION, Keyword::LOCAL]);
+        if self.parse_keywords(&[Keyword::TIME, Keyword::ZONE]) {
+            let value = if self.parse_keyword(Keyword::DEFAULT) {
+                SetTimeZoneValue::Default
+            } else if self.parse_keyword(Keyword::LOCAL) {
+                SetTimeZoneValue::Local
+            } else if let Ok(ident) = self.parse_identifier() {
+                SetTimeZoneValue::Ident(ident)
+            } else {
+                let value = self.parse_value()?;
+                SetTimeZoneValue::Literal(value)
+            };
+
+            return Ok(Statement::SetTimeZone {
+                local: modifier == Some(Keyword::LOCAL),
+                value,
+            });
+        }
         let variable = self.parse_identifier()?;
         if self.consume_token(&Token::Eq) || self.parse_keyword(Keyword::TO) {
             let mut values = vec![];

src/sqlparser/tests/testdata/select.yaml

@@ -78,4 +78,4 @@
     Near "SELECT 1::int"
 - input: select id1, a1, id2, a2 from stream as S join version FOR SYSTEM_TIME AS OF NOW() AS V on id1= id2
   formatted_sql: SELECT id1, a1, id2, a2 FROM stream AS S JOIN version FOR SYSTEM_TIME AS OF NOW() AS V ON id1 = id2
-  formatted_ast: 'Query(Query { with: None, body: Select(Select { distinct: All, projection: [UnnamedExpr(Identifier(Ident { value: "id1", quote_style: None })), UnnamedExpr(Identifier(Ident { value: "a1", quote_style: None })), UnnamedExpr(Identifier(Ident { value: "id2", quote_style: None })), UnnamedExpr(Identifier(Ident { value: "a2", quote_style: None }))], from: [TableWithJoins { relation: Table { name: ObjectName([Ident { value: "stream", quote_style: None }]), alias: Some(TableAlias { name: Ident { value: "S", quote_style: None }, columns: [] }), for_system_time_as_of_now: false }, joins: [Join { relation: Table { name: ObjectName([Ident { value: "version", quote_style: None }]), alias: Some(TableAlias { name: Ident { value: "V", quote_style: None }, columns: [] }), for_system_time_as_of_now: true }, join_operator: Inner(On(BinaryOp { left: Identifier(Ident { value: "id1", quote_style: None }), op: Eq, right: Identifier(Ident { value: "id2", quote_style: None }) })) }] }], lateral_views: [], selection: None, group_by: [], having: None }), order_by: [], limit: None, offset: None, fetch: None })'
+  formatted_ast: 'Query(Query { with: None, body: Select(Select { distinct: All, projection: [UnnamedExpr(Identifier(Ident { value: "id1", quote_style: None })), UnnamedExpr(Identifier(Ident { value: "a1", quote_style: None })), UnnamedExpr(Identifier(Ident { value: "id2", quote_style: None })), UnnamedExpr(Identifier(Ident { value: "a2", quote_style: None }))], from: [TableWithJoins { relation: Table { name: ObjectName([Ident { value: "stream", quote_style: None }]), alias: Some(TableAlias { name: Ident { value: "S", quote_style: None }, columns: [] }), for_system_time_as_of_now: false }, joins: [Join { relation: Table { name: ObjectName([Ident { value: "version", quote_style: None }]), alias: Some(TableAlias { name: Ident { value: "V", quote_style: None }, columns: [] }), for_system_time_as_of_now: true }, join_operator: Inner(On(BinaryOp { left: Identifier(Ident { value: "id1", quote_style: None }), op: Eq, right: Identifier(Ident { value: "id2", quote_style: None }) })) }] }], lateral_views: [], selection: None, group_by: [], having: None }), order_by: [], limit: None, offset: None, fetch: None })'

src/sqlparser/tests/testdata/set.yaml

@@ -0,0 +1,17 @@
+# This file is automatically generated. See `src/sqlparser/test_runner/src/bin/apply.rs` for more information.
+- input: SET TIME ZONE LOCAL
+  formatted_sql: SET TIME ZONE LOCAL
+- input: SET TIME ZONE DEFAULT
+  formatted_sql: SET TIME ZONE DEFAULT
+- input: SET TIME ZONE "Asia/Shanghai"
+  formatted_sql: SET TIME ZONE "Asia/Shanghai"
+- input: SET TIME ZONE 'Asia/Shanghai'
+  error_msg: |-
+    sql parser error: Expected a value, found: EOF
+    Near "SET TIME ZONE 'Asia/Shanghai'"
+- input: SET TIME ZONE "UTC"
+  formatted_sql: SET TIME ZONE "UTC"
+- input: SET TIME ZONE UTC
+  formatted_sql: SET TIME ZONE UTC
+- input: set time = '1';
+  formatted_sql: SET time = '1'