feat: show settings support like

.github/workflows/databend-auto-tag.yml

@@ -3,7 +3,7 @@ name: Auto tag for nightly release
 on:
   schedule:
     # Release at 00:00 UTC+8
-    - cron:  '0 16 * * *'
+    - cron: '0 16 * * *'
   workflow_dispatch:
 
 permissions:

common/ast/src/ast/statements/show.rs

@@ -26,7 +26,7 @@ pub enum ShowLimit<'a> {
 impl<'a> Display for ShowLimit<'a> {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {
-            ShowLimit::Like { pattern } => write!(f, "LIKE {pattern}"),
+            ShowLimit::Like { pattern } => write!(f, "LIKE '{pattern}'"),
             ShowLimit::Where { selection } => write!(f, "WHERE {selection}"),
         }
     }

common/ast/src/ast/statements/statement.rs

@@ -37,7 +37,9 @@ pub enum Statement<'a> {
     Copy(CopyStmt<'a>),
     Call(CallStmt),
 
-    ShowSettings,
+    ShowSettings {
+        like: Option<String>,
+    },
     ShowProcessList,
     ShowMetrics,
     ShowFunctions {
@@ -186,7 +188,12 @@ impl<'a> Display for Statement<'a> {
                 }
             }
             Statement::Copy(stmt) => write!(f, "{stmt}")?,
-            Statement::ShowSettings => {}
+            Statement::ShowSettings { like } => {
+                write!(f, "SHOW SETTINGS")?;
+                if like.is_some() {
+                    write!(f, " LIKE '{}'", like.as_ref().unwrap())?;
+                }
+            }
             Statement::ShowProcessList => write!(f, "SHOW PROCESSLIST")?,
             Statement::ShowMetrics => write!(f, "SHOW METRICS")?,
             Statement::ShowFunctions { limit } => {

common/ast/src/parser/statement.rs

@@ -81,7 +81,14 @@ pub fn statement(i: Input) -> IResult<StatementMsg> {
             selection: opt_where_block.map(|(_, selection)| selection),
         },
     );
-    let show_settings = value(Statement::ShowSettings, rule! { SHOW ~ SETTINGS });
+    let show_settings = map(
+        rule! {
+            SHOW ~ SETTINGS ~ (LIKE ~ #literal_string)?
+        },
+        |(_, _, opt_like)| Statement::ShowSettings {
+            like: opt_like.map(|(_, like)| like),
+        },
+    );
     let show_stages = value(Statement::ShowStages, rule! { SHOW ~ STAGES });
     let show_process_list = value(Statement::ShowProcessList, rule! { SHOW ~ PROCESSLIST });
     let show_metrics = value(Statement::ShowMetrics, rule! { SHOW ~ METRICS });
@@ -689,7 +696,7 @@ pub fn statement(i: Input) -> IResult<StatementMsg> {
             | #explain : "`EXPLAIN [PIPELINE | GRAPH] <statement>`"
             | #insert : "`INSERT INTO [TABLE] <table> [(<column>, ...)] (FORMAT <format> | VALUES <values> | <query>)`"
             | #delete : "`DELETE FROM <table> [WHERE ...]`"
-            | #show_settings : "`SHOW SETTINGS`"
+            | #show_settings : "`SHOW SETTINGS [<show_limit>]`"
             | #show_stages : "`SHOW STAGES`"
             | #show_process_list : "`SHOW PROCESSLIST`"
             | #show_metrics : "`SHOW METRICS`"

common/ast/tests/it/parser.rs

@@ -211,6 +211,7 @@ fn test_statement() {
                 size_limit=10;"#,
         r#"CALL system$test(a)"#,
         r#"CALL system$test('a')"#,
+        r#"show settings like 'enable%'"#,
     ];
 
     for case in cases {
@@ -264,6 +265,7 @@ fn test_statement_error() {
         r#"COPY INTO mytable FROM @mystage CREDENTIALS = ();"#,
         r#"CALL system$test"#,
         r#"CALL system$test(a"#,
+        r#"show settings ilike 'enable%'"#,
     ];
 
     for case in cases {

common/ast/tests/it/testdata/statement-error.txt

@@ -304,3 +304,13 @@ error:
   | while parsing `CALL <procedure_name>(<parameter>, ...)`
 
 
+---------- Input ----------
+show settings ilike 'enable%'
+---------- Output ---------
+error: 
+  --> SQL:1:15
+  |
+1 | show settings ilike 'enable%'
+  |               ^^^^^ expected `LIKE`, `FORMAT`, or `;`
+
+

common/ast/tests/it/testdata/statement.txt

@@ -4755,3 +4755,15 @@ Call(
 )
 
 
+---------- Input ----------
+show settings like 'enable%'
+---------- Output ---------
+SHOW SETTINGS LIKE 'enable%'
+---------- AST ------------
+ShowSettings {
+    like: Some(
+        "enable%",
+    ),
+}
+
+

query/src/sql/planner/binder/mod.rs

@@ -118,7 +118,7 @@ impl<'a> Binder {
 
             Statement::ShowMetrics => Plan::ShowMetrics,
             Statement::ShowProcessList => Plan::ShowProcessList,
-            Statement::ShowSettings => Plan::ShowSettings,
+            Statement::ShowSettings { like } => self.bind_show_settings(bind_context, like).await?,
 
             // Databases
             Statement::ShowDatabases(stmt) => self.bind_show_databases(stmt).await?,

query/src/sql/planner/binder/show.rs

@@ -23,7 +23,7 @@ use crate::sql::BindContext;
 use crate::sql::Binder;
 
 impl<'a> Binder {
-    pub(super) async fn bind_show_functions(
+    pub(in crate::sql::planner::binder) async fn bind_show_functions(
         &mut self,
         bind_context: &BindContext,
         limit: &Option<ShowLimit<'a>>,
@@ -51,4 +51,21 @@ impl<'a> Binder {
         let (stmt, _) = parse_sql(&tokens, &backtrace)?;
         self.bind_statement(bind_context, &stmt).await
     }
+
+    pub(in crate::sql::planner::binder) async fn bind_show_settings(
+        &mut self,
+        bind_context: &BindContext,
+        like: &Option<String>,
+    ) -> Result<Plan> {
+        let sub_query = like
+            .clone()
+            .map(|s| format!("WHERE name LIKE '{s}'"))
+            .unwrap_or_else(|| "".to_string());
+        let query = format!("SELECT name, value, default, level, description, type FROM system.settings {} ORDER BY name", sub_query);
+
+        let tokens = tokenize_sql(query.as_str())?;
+        let backtrace = Backtrace::new();
+        let (stmt, _) = parse_sql(&tokens, &backtrace)?;
+        self.bind_statement(bind_context, &stmt).await
+    }
 }

tests/suites/0_stateless/06_show/06_0003_show_settings_v2.result

@@ -0,0 +1,19 @@
+compression	None	None	SESSION	Format compression, default value: None	String
+empty_as_default	1	1	SESSION	Format empty_as_default, default value: 1	UInt64
+enable_async_insert	0	0	SESSION	Whether the client open async insert mode, default value: 0	UInt64
+enable_new_processor_framework	1	1	SESSION	Enable new processor framework if value != 0, default value: 1	UInt64
+enable_planner_v2	1	0	SESSION	Enable planner v2 by setting this variable to 1, default value: 0	UInt64
+field_delimiter	,	,	SESSION	Format field delimiter, default value: ,	String
+flight_client_timeout	60	60	SESSION	Max duration the flight client request is allowed to take in seconds. By default, it is 60 seconds	UInt64
+group_by_two_level_threshold	10000	10000	SESSION	The threshold of keys to open two-level aggregation, default value: 10000	UInt64
+max_block_size	10000	10000	SESSION	Maximum block size for reading	UInt64
+max_threads	11	16	SESSION	The maximum number of threads to execute the request. By default, it is determined automatically.	UInt64
+record_delimiter	\n	\n	SESSION	Format record_delimiter, default value: \n	String
+skip_header	0	0	SESSION	Whether to skip the input header, default value: 0	UInt64
+storage_read_buffer_size	1048576	1048576	SESSION	The size of buffer in bytes for buffered reader of dal. By default, it is 1MB.	UInt64
+timezone	UTC	UTC	SESSION	Timezone, default value: UTC,	String
+wait_for_async_insert	1	1	SESSION	Whether the client wait for the reply of async insert, default value: 1	UInt64
+wait_for_async_insert_timeout	100	100	SESSION	The timeout in seconds for waiting for processing of async insert, default value: 100	UInt64
+enable_async_insert	0	0	SESSION	Whether the client open async insert mode, default value: 0	UInt64
+enable_new_processor_framework	1	1	SESSION	Enable new processor framework if value != 0, default value: 1	UInt64
+enable_planner_v2	1	0	SESSION	Enable planner v2 by setting this variable to 1, default value: 0	UInt64

tests/suites/0_stateless/06_show/06_0003_show_settings_v2.sql

@@ -0,0 +1,6 @@
+SET enable_planner_v2=1;
+SET max_threads=11;
+SET unknown_settings=11; -- {ErrorCode 2801}
+SHOW SETTINGS;
+SHOW SETTINGS LIKE 'enable%';
+SET enable_planner_v2=0;