databend-common-ast 0.0.0

SQL parser for Databend
Documentation
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// Copyright 2021 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::ast::*;
use crate::Span;

#[deprecated = "Use derive_visitor::VisitorMut instead"]
pub trait VisitorMut: Sized {
    fn visit_expr(&mut self, expr: &mut Expr) {
        walk_expr_mut(self, expr);
    }

    fn visit_identifier(&mut self, _ident: &mut Identifier) {}

    fn visit_column_id(&mut self, column: &mut ColumnID) {
        match column {
            ColumnID::Name(ident) => {
                self.visit_identifier(ident);
            }
            ColumnID::Position(pos) => {
                self.visit_column_position(pos);
            }
        }
    }

    fn visit_column_position(&mut self, _ident: &mut ColumnPosition) {}

    fn visit_database_ref(&mut self, catalog: &mut Option<Identifier>, database: &mut Identifier) {
        if let Some(catalog) = catalog {
            walk_identifier_mut(self, catalog);
        }

        walk_identifier_mut(self, database);
    }

    fn visit_table_ref(
        &mut self,
        catalog: &mut Option<Identifier>,
        database: &mut Option<Identifier>,
        table: &mut Identifier,
    ) {
        if let Some(catalog) = catalog {
            walk_identifier_mut(self, catalog);
        }

        if let Some(database) = database {
            walk_identifier_mut(self, database);
        }

        walk_identifier_mut(self, table);
    }

    fn visit_column_ref(
        &mut self,
        _span: Span,
        database: &mut Option<Identifier>,
        table: &mut Option<Identifier>,
        column: &mut ColumnID,
    ) {
        if let Some(database) = database {
            walk_identifier_mut(self, database);
        }

        if let Some(table) = table {
            walk_identifier_mut(self, table);
        }

        walk_column_id_mut(self, column);
    }

    fn visit_is_null(&mut self, _span: Span, expr: &mut Expr, _not: bool) {
        Self::visit_expr(self, expr);
    }

    fn visit_is_distinct_from(
        &mut self,
        _span: Span,
        left: &mut Expr,
        right: &mut Expr,
        _not: bool,
    ) {
        Self::visit_expr(self, left);
        Self::visit_expr(self, right);
    }

    fn visit_in_list(&mut self, _span: Span, expr: &mut Expr, list: &mut [Expr], _not: bool) {
        Self::visit_expr(self, expr);
        for expr in list {
            Self::visit_expr(self, expr);
        }
    }

    fn visit_in_subquery(
        &mut self,
        _span: Span,
        expr: &mut Expr,
        subquery: &mut Query,
        _not: bool,
    ) {
        Self::visit_expr(self, expr);
        walk_query_mut(self, subquery);
    }

    fn visit_between(
        &mut self,
        _span: Span,
        expr: &mut Expr,
        low: &mut Expr,
        high: &mut Expr,
        _not: bool,
    ) {
        Self::visit_expr(self, expr);
        Self::visit_expr(self, low);
        Self::visit_expr(self, high);
    }

    fn visit_binary_op(
        &mut self,
        _span: Span,
        _op: &mut BinaryOperator,
        left: &mut Expr,
        right: &mut Expr,
    ) {
        Self::visit_expr(self, left);
        Self::visit_expr(self, right);
    }

    fn visit_json_op(
        &mut self,
        _span: Span,
        _op: &mut JsonOperator,
        left: &mut Expr,
        right: &mut Expr,
    ) {
        Self::visit_expr(self, left);
        Self::visit_expr(self, right);
    }

    fn visit_unary_op(&mut self, _span: Span, _op: &mut UnaryOperator, expr: &mut Expr) {
        Self::visit_expr(self, expr);
    }

    fn visit_cast(
        &mut self,
        _span: Span,
        expr: &mut Expr,
        _target_type: &mut TypeName,
        _pg_style: bool,
    ) {
        Self::visit_expr(self, expr);
    }

    fn visit_try_cast(&mut self, _span: Span, expr: &mut Expr, _target_type: &mut TypeName) {
        Self::visit_expr(self, expr);
    }

    fn visit_extract(&mut self, _span: Span, _kind: &mut IntervalKind, expr: &mut Expr) {
        Self::visit_expr(self, expr);
    }

    fn visit_position(&mut self, _span: Span, substr_expr: &mut Expr, str_expr: &mut Expr) {
        Self::visit_expr(self, substr_expr);
        Self::visit_expr(self, str_expr);
    }

    fn visit_substring(
        &mut self,
        _span: Span,
        expr: &mut Expr,
        substring_from: &mut Box<Expr>,
        substring_for: &mut Option<Box<Expr>>,
    ) {
        Self::visit_expr(self, expr);
        Self::visit_expr(self, substring_from);

        if let Some(substring_for) = substring_for {
            Self::visit_expr(self, substring_for);
        }
    }

    fn visit_trim(
        &mut self,
        _span: Span,
        expr: &mut Expr,
        trim_where: &mut Option<(TrimWhere, Box<Expr>)>,
    ) {
        Self::visit_expr(self, expr);

        if let Some((_, trim_where_expr)) = trim_where {
            Self::visit_expr(self, trim_where_expr);
        }
    }

    fn visit_literal(&mut self, _span: Span, _lit: &mut Literal) {}

    fn visit_count_all(&mut self, _span: Span, window: &mut Option<Window>) {
        if let Some(window) = window {
            match window {
                Window::WindowReference(reference) => {
                    self.visit_identifier(&mut reference.window_name);
                }
                Window::WindowSpec(spec) => {
                    spec.partition_by
                        .iter_mut()
                        .for_each(|expr| Self::visit_expr(self, expr));
                    spec.order_by
                        .iter_mut()
                        .for_each(|expr| Self::visit_expr(self, &mut expr.expr));

                    if let Some(frame) = &mut spec.window_frame {
                        self.visit_frame_bound(&mut frame.start_bound);
                        self.visit_frame_bound(&mut frame.end_bound);
                    }
                }
            }
        }
    }

    fn visit_tuple(&mut self, _span: Span, elements: &mut [Expr]) {
        for elem in elements.iter_mut() {
            Self::visit_expr(self, elem);
        }
    }

    #[allow(clippy::too_many_arguments)]
    fn visit_function_call(
        &mut self,
        _span: Span,
        _distinct: bool,
        _name: &mut Identifier,
        args: &mut Vec<Expr>,
        params: &mut Vec<Expr>,
        over: &mut Option<Window>,
        lambda: &mut Option<Lambda>,
    ) {
        for arg in args.iter_mut() {
            Self::visit_expr(self, arg);
        }
        for param in params.iter_mut() {
            Self::visit_expr(self, param);
        }

        if let Some(over) = over {
            match over {
                Window::WindowReference(reference) => {
                    self.visit_identifier(&mut reference.window_name);
                }
                Window::WindowSpec(spec) => {
                    spec.partition_by
                        .iter_mut()
                        .for_each(|expr| Self::visit_expr(self, expr));
                    spec.order_by
                        .iter_mut()
                        .for_each(|expr| Self::visit_expr(self, &mut expr.expr));

                    if let Some(frame) = &mut spec.window_frame {
                        self.visit_frame_bound(&mut frame.start_bound);
                        self.visit_frame_bound(&mut frame.end_bound);
                    }
                }
            }
        }
        if let Some(lambda) = lambda {
            Self::visit_expr(self, &mut lambda.expr)
        }
    }

    fn visit_frame_bound(&mut self, bound: &mut WindowFrameBound) {
        match bound {
            WindowFrameBound::Preceding(Some(expr)) => Self::visit_expr(self, expr.as_mut()),
            WindowFrameBound::Following(Some(expr)) => Self::visit_expr(self, expr.as_mut()),
            _ => {}
        }
    }

    fn visit_case_when(
        &mut self,
        _span: Span,
        operand: &mut Option<Box<Expr>>,
        conditions: &mut [Expr],
        results: &mut [Expr],
        else_result: &mut Option<Box<Expr>>,
    ) {
        if let Some(operand) = operand {
            Self::visit_expr(self, operand);
        }

        for condition in conditions.iter_mut() {
            Self::visit_expr(self, condition);
        }

        for result in results.iter_mut() {
            Self::visit_expr(self, result);
        }

        if let Some(else_result) = else_result {
            Self::visit_expr(self, else_result);
        }
    }

    fn visit_exists(&mut self, _span: Span, _not: bool, subquery: &mut Query) {
        walk_query_mut(self, subquery);
    }

    fn visit_subquery(
        &mut self,
        _span: Span,
        _modifier: &mut Option<SubqueryModifier>,
        subquery: &mut Query,
    ) {
        walk_query_mut(self, subquery);
    }

    fn visit_map_access(&mut self, _span: Span, expr: &mut Expr, _accessor: &mut MapAccessor) {
        Self::visit_expr(self, expr);
    }

    fn visit_array(&mut self, _span: Span, elements: &mut [Expr]) {
        for elem in elements.iter_mut() {
            Self::visit_expr(self, elem);
        }
    }

    fn visit_map(&mut self, _span: Span, kvs: &mut [(Literal, Expr)]) {
        for (key_expr, val_expr) in kvs {
            self.visit_literal(_span, key_expr);
            Self::visit_expr(self, val_expr);
        }
    }

    fn visit_interval(&mut self, _span: Span, expr: &mut Expr, _unit: &mut IntervalKind) {
        Self::visit_expr(self, expr);
    }

    fn visit_date_add(
        &mut self,
        _span: Span,
        _unit: &mut IntervalKind,
        interval: &mut Expr,
        date: &mut Expr,
    ) {
        Self::visit_expr(self, date);
        Self::visit_expr(self, interval);
    }

    fn visit_date_sub(
        &mut self,
        _span: Span,
        _unit: &mut IntervalKind,
        interval: &mut Expr,
        date: &mut Expr,
    ) {
        Self::visit_expr(self, date);
        Self::visit_expr(self, interval);
    }

    fn visit_date_trunc(&mut self, _span: Span, _unit: &mut IntervalKind, date: &mut Expr) {
        Self::visit_expr(self, date);
    }

    fn visit_statement(&mut self, statement: &mut Statement) {
        walk_statement_mut(self, statement);
    }

    fn visit_query(&mut self, query: &mut Query) {
        walk_query_mut(self, query);
    }

    fn visit_explain(
        &mut self,
        _kind: &mut ExplainKind,
        _options: &mut [ExplainOption],
        stmt: &mut Statement,
    ) {
        walk_statement_mut(self, stmt);
    }

    fn visit_copy_into_table(&mut self, copy: &mut CopyIntoTableStmt) {
        if let CopyIntoTableSource::Query(query) = &mut copy.src {
            self.visit_query(query)
        }
    }
    fn visit_copy_into_location(&mut self, copy: &mut CopyIntoLocationStmt) {
        if let CopyIntoLocationSource::Query(query) = &mut copy.src {
            self.visit_query(query)
        }
    }

    fn visit_call(&mut self, _call: &mut CallStmt) {}

    fn visit_show_settings(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_process_list(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_metrics(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_engines(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_functions(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_user_functions(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_indexes(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_locks(&mut self, _show_locks: &mut ShowLocksStmt) {}

    fn visit_show_table_functions(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_show_limit(&mut self, _limit: &mut ShowLimit) {}

    fn visit_kill(&mut self, _kill_target: &mut KillTarget, _object_id: &mut String) {}

    fn visit_set_variable(
        &mut self,
        _is_global: bool,
        _variable: &mut Identifier,
        _value: &mut Box<Expr>,
    ) {
    }

    fn visit_unset_variable(&mut self, _stmt: &mut UnSetStmt) {}

    fn visit_set_role(&mut self, _is_default: bool, _role_name: &mut String) {}
    fn visit_set_secondary_roles(&mut self, _option: &mut SecondaryRolesOption) {}

    fn visit_insert(&mut self, insert: &mut InsertStmt) {
        if let InsertSource::Select { query } = &mut insert.source {
            self.visit_query(query)
        }
    }
    fn visit_replace(&mut self, replace: &mut ReplaceStmt) {
        if let InsertSource::Select { query } = &mut replace.source {
            self.visit_query(query)
        }
    }
    fn visit_merge_into(&mut self, merge_into: &mut MergeIntoStmt) {
        // for visit merge into, its destination is to do some rules for the exprs
        // in merge into before we bind_merge_into, we need to make sure the correct
        // exprs rewrite for bind_merge_into
        if let MergeSource::Select { query, .. } = &mut merge_into.source {
            self.visit_query(query)
        }
        self.visit_expr(&mut merge_into.join_expr);
        for operation in &mut merge_into.merge_options {
            match operation {
                MergeOption::Match(match_operation) => {
                    if let Some(expr) = &mut match_operation.selection {
                        self.visit_expr(expr)
                    }
                    if let MatchOperation::Update { update_list, .. } =
                        &mut match_operation.operation
                    {
                        for update in update_list {
                            self.visit_expr(&mut update.expr)
                        }
                    }
                }
                MergeOption::Unmatch(unmatch_operation) => {
                    if let Some(expr) = &mut unmatch_operation.selection {
                        self.visit_expr(expr)
                    }
                    for expr in &mut unmatch_operation.insert_operation.values {
                        self.visit_expr(expr)
                    }
                }
            }
        }
    }

    fn visit_insert_source(&mut self, _insert_source: &mut InsertSource) {}

    fn visit_delete(&mut self, delete: &mut DeleteStmt) {
        if let Some(expr) = &mut delete.selection {
            self.visit_expr(expr)
        }
    }

    fn visit_update(&mut self, update: &mut UpdateStmt) {
        if let Some(expr) = &mut update.selection {
            self.visit_expr(expr)
        }
        for update in &mut update.update_list {
            self.visit_expr(&mut update.expr)
        }
    }

    fn visit_show_catalogs(&mut self, _stmt: &mut ShowCatalogsStmt) {}

    fn visit_show_create_catalog(&mut self, _stmt: &mut ShowCreateCatalogStmt) {}

    fn visit_create_catalog(&mut self, _stmt: &mut CreateCatalogStmt) {}

    fn visit_drop_catalog(&mut self, _stmt: &mut DropCatalogStmt) {}

    fn visit_show_databases(&mut self, _stmt: &mut ShowDatabasesStmt) {}

    fn visit_show_create_databases(&mut self, _stmt: &mut ShowCreateDatabaseStmt) {}

    fn visit_create_database(&mut self, _stmt: &mut CreateDatabaseStmt) {}

    fn visit_drop_database(&mut self, _stmt: &mut DropDatabaseStmt) {}

    fn visit_undrop_database(&mut self, _stmt: &mut UndropDatabaseStmt) {}

    fn visit_alter_database(&mut self, _stmt: &mut AlterDatabaseStmt) {}

    fn visit_use_database(&mut self, _database: &mut Identifier) {}

    fn visit_show_tables(&mut self, _stmt: &mut ShowTablesStmt) {}

    fn visit_show_columns(&mut self, _stmt: &mut ShowColumnsStmt) {}

    fn visit_show_create_table(&mut self, _stmt: &mut ShowCreateTableStmt) {}

    fn visit_describe_table(&mut self, _stmt: &mut DescribeTableStmt) {}

    fn visit_show_tables_status(&mut self, _stmt: &mut ShowTablesStatusStmt) {}

    fn visit_show_drop_tables(&mut self, _stmt: &mut ShowDropTablesStmt) {}

    fn visit_create_table(&mut self, stmt: &mut CreateTableStmt) {
        if let Some(query) = stmt.as_query.as_deref_mut() {
            self.visit_query(query)
        }
    }

    fn visit_create_table_source(&mut self, _source: &mut CreateTableSource) {}

    fn visit_column_definition(&mut self, _column_definition: &mut ColumnDefinition) {}

    fn visit_inverted_index_definition(
        &mut self,
        _inverted_index_definition: &mut InvertedIndexDefinition,
    ) {
    }

    fn visit_drop_table(&mut self, _stmt: &mut DropTableStmt) {}

    fn visit_undrop_table(&mut self, _stmt: &mut UndropTableStmt) {}

    fn visit_alter_table(&mut self, _stmt: &mut AlterTableStmt) {}

    fn visit_rename_table(&mut self, _stmt: &mut RenameTableStmt) {}

    fn visit_truncate_table(&mut self, _stmt: &mut TruncateTableStmt) {}

    fn visit_optimize_table(&mut self, _stmt: &mut OptimizeTableStmt) {}

    fn visit_vacuum_table(&mut self, _stmt: &mut VacuumTableStmt) {}

    fn visit_vacuum_drop_table(&mut self, _stmt: &mut VacuumDropTableStmt) {}

    fn visit_vacuum_temporary_files(&mut self, _stmt: &mut VacuumTemporaryFiles) {}

    fn visit_analyze_table(&mut self, _stmt: &mut AnalyzeTableStmt) {}

    fn visit_exists_table(&mut self, _stmt: &mut ExistsTableStmt) {}

    fn visit_create_view(&mut self, _stmt: &mut CreateViewStmt) {}

    fn visit_alter_view(&mut self, _stmt: &mut AlterViewStmt) {}

    fn visit_drop_view(&mut self, _stmt: &mut DropViewStmt) {}

    fn visit_show_views(&mut self, _stmt: &mut ShowViewsStmt) {}

    fn visit_describe_view(&mut self, _stmt: &mut DescribeViewStmt) {}

    fn visit_create_stream(&mut self, _stmt: &mut CreateStreamStmt) {}

    fn visit_drop_stream(&mut self, _stmt: &mut DropStreamStmt) {}

    fn visit_show_streams(&mut self, _stmt: &mut ShowStreamsStmt) {}

    fn visit_describe_stream(&mut self, _stmt: &mut DescribeStreamStmt) {}

    fn visit_create_index(&mut self, _stmt: &mut CreateIndexStmt) {}

    fn visit_drop_index(&mut self, _stmt: &mut DropIndexStmt) {}

    fn visit_refresh_index(&mut self, _stmt: &mut RefreshIndexStmt) {}

    fn visit_create_inverted_index(&mut self, _stmt: &mut CreateInvertedIndexStmt) {}

    fn visit_drop_inverted_index(&mut self, _stmt: &mut DropInvertedIndexStmt) {}

    fn visit_refresh_inverted_index(&mut self, _stmt: &mut RefreshInvertedIndexStmt) {}

    fn visit_create_virtual_column(&mut self, _stmt: &mut CreateVirtualColumnStmt) {}

    fn visit_alter_virtual_column(&mut self, _stmt: &mut AlterVirtualColumnStmt) {}

    fn visit_drop_virtual_column(&mut self, _stmt: &mut DropVirtualColumnStmt) {}

    fn visit_refresh_virtual_column(&mut self, _stmt: &mut RefreshVirtualColumnStmt) {}

    fn visit_show_virtual_columns(&mut self, _stmt: &mut ShowVirtualColumnsStmt) {}

    fn visit_show_users(&mut self) {}

    fn visit_create_user(&mut self, _stmt: &mut CreateUserStmt) {}

    fn visit_alter_user(&mut self, _stmt: &mut AlterUserStmt) {}

    fn visit_drop_user(&mut self, _if_exists: bool, _user: &mut UserIdentity) {}

    fn visit_show_roles(&mut self) {}

    fn visit_create_role(&mut self, _if_not_exists: bool, _role_name: &mut String) {}

    fn visit_drop_role(&mut self, _if_exists: bool, _role_name: &mut String) {}

    fn visit_grant(&mut self, _grant: &mut GrantStmt) {}

    fn visit_show_grant(
        &mut self,
        _principal: &mut Option<PrincipalIdentity>,
        _show_options: &mut Option<ShowOptions>,
    ) {
    }

    fn visit_show_object_priv(&mut self, _show: &mut ShowObjectPrivilegesStmt) {}

    fn visit_revoke(&mut self, _revoke: &mut RevokeStmt) {}

    fn visit_create_udf(&mut self, _stmt: &mut CreateUDFStmt) {}

    fn visit_drop_udf(&mut self, _if_exists: bool, _udf_name: &mut Identifier) {}

    fn visit_alter_udf(&mut self, _stmt: &mut AlterUDFStmt) {}

    fn visit_create_stage(&mut self, _stmt: &mut CreateStageStmt) {}

    fn visit_show_stages(&mut self) {}

    fn visit_drop_stage(&mut self, _if_exists: bool, _stage_name: &mut String) {}

    fn visit_describe_stage(&mut self, _stage_name: &mut String) {}

    fn visit_remove_stage(&mut self, _location: &mut String, _pattern: &mut String) {}

    fn visit_list_stage(&mut self, _location: &mut String, _pattern: &mut Option<String>) {}

    fn visit_create_file_format(
        &mut self,
        _create_option: &CreateOption,
        _name: &mut String,
        _file_format_options: &mut FileFormatOptions,
    ) {
    }

    fn visit_drop_file_format(&mut self, _if_exists: bool, _name: &mut String) {}

    fn visit_show_file_formats(&mut self) {}

    fn visit_presign(&mut self, _presign: &mut PresignStmt) {}

    fn visit_create_share_endpoint(&mut self, _stmt: &mut CreateShareEndpointStmt) {}

    fn visit_show_share_endpoint(&mut self, _stmt: &mut ShowShareEndpointStmt) {}

    fn visit_drop_share_endpoint(&mut self, _stmt: &mut DropShareEndpointStmt) {}

    fn visit_create_share(&mut self, _stmt: &mut CreateShareStmt) {}

    fn visit_drop_share(&mut self, _stmt: &mut DropShareStmt) {}

    fn visit_grant_share_object(&mut self, _stmt: &mut GrantShareObjectStmt) {}

    fn visit_revoke_share_object(&mut self, _stmt: &mut RevokeShareObjectStmt) {}

    fn visit_alter_share_tenants(&mut self, _stmt: &mut AlterShareTenantsStmt) {}

    fn visit_desc_share(&mut self, _stmt: &mut DescShareStmt) {}

    fn visit_show_shares(&mut self, _stmt: &mut ShowSharesStmt) {}

    fn visit_show_object_grant_privileges(&mut self, _stmt: &mut ShowObjectGrantPrivilegesStmt) {}

    fn visit_show_grants_of_share(&mut self, _stmt: &mut ShowGrantsOfShareStmt) {}

    fn visit_create_data_mask_policy(&mut self, _stmt: &mut CreateDatamaskPolicyStmt) {}

    fn visit_drop_data_mask_policy(&mut self, _stmt: &mut DropDatamaskPolicyStmt) {}

    fn visit_desc_data_mask_policy(&mut self, _stmt: &mut DescDatamaskPolicyStmt) {}

    fn visit_create_network_policy(&mut self, _stmt: &mut CreateNetworkPolicyStmt) {}

    fn visit_alter_network_policy(&mut self, _stmt: &mut AlterNetworkPolicyStmt) {}

    fn visit_drop_network_policy(&mut self, _stmt: &mut DropNetworkPolicyStmt) {}

    fn visit_desc_network_policy(&mut self, _stmt: &mut DescNetworkPolicyStmt) {}

    fn visit_show_network_policies(&mut self) {}

    fn visit_create_password_policy(&mut self, _stmt: &mut CreatePasswordPolicyStmt) {}

    fn visit_alter_password_policy(&mut self, _stmt: &mut AlterPasswordPolicyStmt) {}

    fn visit_drop_password_policy(&mut self, _stmt: &mut DropPasswordPolicyStmt) {}

    fn visit_desc_password_policy(&mut self, _stmt: &mut DescPasswordPolicyStmt) {}

    fn visit_show_password_policies(&mut self, _show_options: &mut Option<ShowOptions>) {}

    fn visit_create_task(&mut self, _stmt: &mut CreateTaskStmt) {}

    fn visit_drop_task(&mut self, _stmt: &mut DropTaskStmt) {}

    fn visit_show_tasks(&mut self, _stmt: &mut ShowTasksStmt) {}

    fn visit_execute_task(&mut self, _stmt: &mut ExecuteTaskStmt) {}

    fn visit_describe_task(&mut self, _stmt: &mut DescribeTaskStmt) {}

    fn visit_alter_task(&mut self, _stmt: &mut AlterTaskStmt) {}

    fn visit_create_dynamic_table(&mut self, stmt: &mut CreateDynamicTableStmt) {
        self.visit_query(&mut stmt.as_query)
    }

    // notification
    fn visit_create_notification(&mut self, _stmt: &mut CreateNotificationStmt) {}
    fn visit_drop_notification(&mut self, _stmt: &mut DropNotificationStmt) {}
    fn visit_alter_notification(&mut self, _stmt: &mut AlterNotificationStmt) {}
    fn visit_describe_notification(&mut self, _stmt: &mut DescribeNotificationStmt) {}

    fn visit_with(&mut self, with: &mut With) {
        let With { ctes, .. } = with;
        for cte in ctes.iter_mut() {
            walk_cte_mut(self, cte);
        }
    }

    fn visit_set_expr(&mut self, expr: &mut SetExpr) {
        walk_set_expr_mut(self, expr);
    }

    fn visit_set_operation(&mut self, op: &mut SetOperation) {
        let SetOperation { left, right, .. } = op;

        walk_set_expr_mut(self, left);
        walk_set_expr_mut(self, right);
    }

    fn visit_order_by(&mut self, order_by: &mut OrderByExpr) {
        let OrderByExpr { expr, .. } = order_by;
        Self::visit_expr(self, expr);
    }

    fn visit_select_stmt(&mut self, stmt: &mut SelectStmt) {
        let SelectStmt {
            select_list,
            from,
            selection,
            group_by,
            having,
            window_list,
            qualify,
            ..
        } = stmt;

        for target in select_list.iter_mut() {
            walk_select_target_mut(self, target);
        }

        for table_ref in from.iter_mut() {
            self.visit_table_reference(table_ref);
        }

        if let Some(selection) = selection {
            Self::visit_expr(self, selection);
        }

        match group_by {
            Some(GroupBy::Normal(exprs)) => {
                for expr in exprs {
                    Self::visit_expr(self, expr);
                }
            }
            Some(GroupBy::GroupingSets(sets)) => {
                for set in sets {
                    for expr in set {
                        Self::visit_expr(self, expr);
                    }
                }
            }
            _ => {}
        }

        if let Some(having) = having {
            Self::visit_expr(self, having);
        }

        if let Some(window_list) = window_list {
            for window_def in window_list {
                walk_window_definition_mut(self, window_def);
            }
        }

        if let Some(qualify) = qualify {
            Self::visit_expr(self, qualify);
        }
    }

    fn visit_select_target(&mut self, target: &mut SelectTarget) {
        walk_select_target_mut(self, target);
    }

    fn visit_table_reference(&mut self, table: &mut TableReference) {
        walk_table_reference_mut(self, table);
    }

    fn visit_temporal_clause(&mut self, clause: &mut TemporalClause) {
        walk_temporal_clause_mut(self, clause);
    }

    fn visit_time_travel_point(&mut self, time: &mut TimeTravelPoint) {
        walk_time_travel_point_mut(self, time);
    }

    fn visit_join(&mut self, join: &mut Join) {
        let Join {
            left,
            right,
            condition,
            ..
        } = join;

        self.visit_table_reference(left);
        self.visit_table_reference(right);

        walk_join_condition_mut(self, condition);
    }

    fn visit_create_connection(&mut self, _stmt: &mut CreateConnectionStmt) {}
    fn visit_drop_connection(&mut self, _stmt: &mut DropConnectionStmt) {}
    fn visit_describe_connection(&mut self, _stmt: &mut DescribeConnectionStmt) {}
    fn visit_show_connections(&mut self, _stmt: &mut ShowConnectionsStmt) {}

    fn visit_create_sequence(&mut self, _stmt: &mut CreateSequenceStmt) {}
    fn visit_drop_sequence(&mut self, _stmt: &mut DropSequenceStmt) {}
    fn visit_set_priority(&mut self, _priority: &mut Priority, _object_id: &mut String) {}
    fn visit_system(&mut self, _stmt: &mut SystemStmt) {}
}