Struct mz_adapter :: session :: SessionVars Copy item path

impl SessionVars

pub fn new_unchecked(build_info: &'static BuildInfo, user: User) -> SessionVars

Creates a new SessionVars without considering the System or Role defaults.

pub fn iter(&self) -> impl Iterator<Item = &dyn Var>

Returns an iterator over the configuration parameters and their current values for this session.

Note that this function does not check that the access variable should be visible because of other settings or users. Before or after accessing this method, you should call Var::visible.

pub fn notify_set(&self) -> impl Iterator<Item = &dyn Var>

Returns an iterator over configuration parameters (and their current values for this session) that are expected to be sent to the client when a new connection is established or when their value changes.

pub fn reset_all(&mut self)

Resets all variables to their default value.

pub fn get( &self, system_vars: Option<&SystemVars>, name: &str ) -> Result<&dyn Var, VarError>

Returns a Var representing the configuration parameter with the specified name.

Configuration parameters are matched case insensitively. If no such configuration parameter exists, get returns an error.

Note that if name is known at compile time, you should instead use the named accessor to access the variable with its true Rust type. For example, self.get("sql_safe_updates").value() returns the string "true" or "false", while self.sql_safe_updates() returns a bool.

pub fn inspect(&self, name: &str) -> Result<&SessionVar, VarError>

Returns a SessionVar for inspection.

Note: If you’re trying to determine the value of the variable with name you should instead use the named accessor, or SessionVars::get.

pub fn set( &mut self, system_vars: Option<&SystemVars>, name: &str, input: VarInput<'_>, local: bool ) -> Result<(), VarError>

Sets the configuration parameter named name to the value represented by value.

The new value may be either committed or rolled back by the next call to SessionVars::end_transaction. If local is true, the new value is always discarded by the next call to SessionVars::end_transaction, even if the transaction is marked to commit.

Like with SessionVars::get, configuration parameters are matched case insensitively. If value is not valid, as determined by the underlying configuration parameter, or if the named configuration parameter does not exist, an error is returned.

pub fn set_default( &mut self, name: &str, input: VarInput<'_> ) -> Result<(), VarError>

Sets the default value for the parameter named name to the value represented by value.

pub fn reset( &mut self, system_vars: Option<&SystemVars>, name: &str, local: bool ) -> Result<(), VarError>

Sets the configuration parameter named name to its default value.

The new value may be either committed or rolled back by the next call to SessionVars::end_transaction. If local is true, the new value is always discarded by the next call to SessionVars::end_transaction, even if the transaction is marked to commit.

Like with SessionVars::get, configuration parameters are matched case insensitively. If the named configuration parameter does not exist, an error is returned.

If the variable does not exist or the user does not have the visibility requires, this function returns an error.

pub fn end_transaction( &mut self, action: EndTransactionAction ) -> BTreeMap<&'static str, String>

Commits or rolls back configuration parameter updates made via SessionVars::set since the last call to end_transaction.

Returns any session parameters that changed because the transaction ended.

pub fn application_name(&self) -> &str

Returns the value of the application_name configuration parameter.

pub fn build_info(&self) -> &'static BuildInfo

Returns the build info.

pub fn client_encoding(&self) -> &ClientEncoding

Returns the value of the client_encoding configuration parameter.

pub fn client_min_messages(&self) -> &ClientSeverity

Returns the value of the client_min_messages configuration parameter.

pub fn cluster(&self) -> &str

Returns the value of the cluster configuration parameter.

pub fn cluster_replica(&self) -> Option<&str>

Returns the value of the cluster_replica configuration parameter.

pub fn date_style(&self) -> &[&str]

Returns the value of the DateStyle configuration parameter.

pub fn database(&self) -> &str

Returns the value of the database configuration parameter.

pub fn extra_float_digits(&self) -> i32

Returns the value of the extra_float_digits configuration parameter.

pub fn integer_datetimes(&self) -> bool

Returns the value of the integer_datetimes configuration parameter.

pub fn intervalstyle(&self) -> &IntervalStyle

Returns the value of the intervalstyle configuration parameter.

pub fn mz_version(&self) -> String

Returns the value of the mz_version configuration parameter.

pub fn search_path(&self) -> &[Ident]

Returns the value of the search_path configuration parameter.

pub fn server_version(&self) -> &str

Returns the value of the server_version configuration parameter.

pub fn server_version_num(&self) -> i32

Returns the value of the server_version_num configuration parameter.

pub fn sql_safe_updates(&self) -> bool

Returns the value of the sql_safe_updates configuration parameter.

pub fn standard_conforming_strings(&self) -> bool

Returns the value of the standard_conforming_strings configuration parameter.

pub fn statement_timeout(&self) -> &Duration

Returns the value of the statement_timeout configuration parameter.

pub fn idle_in_transaction_session_timeout(&self) -> &Duration

Returns the value of the idle_in_transaction_session_timeout configuration parameter.

pub fn timezone(&self) -> &TimeZone

Returns the value of the timezone configuration parameter.

pub fn transaction_isolation(&self) -> &IsolationLevel

Returns the value of the transaction_isolation configuration parameter.

pub fn real_time_recency(&self) -> bool

Returns the value of real_time_recency configuration parameter.

pub fn emit_plan_insights_notice(&self) -> bool

Returns the value of emit_plan_insights_notice configuration parameter.

pub fn emit_timestamp_notice(&self) -> bool

Returns the value of emit_timestamp_notice configuration parameter.

pub fn emit_trace_id_notice(&self) -> bool

Returns the value of emit_trace_id_notice configuration parameter.

pub fn auto_route_introspection_queries(&self) -> bool

Returns the value of auto_route_introspection_queries configuration parameter.

pub fn enable_session_rbac_checks(&self) -> bool

Returns the value of enable_session_rbac_checks configuration parameter.

pub fn enable_session_cardinality_estimates(&self) -> bool

Returns the value of enable_session_cardinality_estimates configuration parameter.

pub fn is_superuser(&self) -> bool

Returns the value of is_superuser configuration parameter.

pub fn user(&self) -> &User

Returns the user associated with this SessionVars instance.

pub fn max_query_result_size(&self) -> u64

Returns the value of the max_query_result_size configuration parameter.

pub fn set_external_user_metadata(&mut self, metadata: ExternalUserMetadata)

Sets the external metadata associated with the user.

pub fn set_cluster(&mut self, cluster: String)

pub fn get_statement_logging_sample_rate( &self ) -> Decimal<mz_repr::::adt::numeric::Numeric::{constant#0}>

pub fn emit_introspection_query_notice(&self) -> bool

Returns the value of the emit_introspection_query_notice configuration parameter.

pub fn unsafe_new_transaction_wall_time( &self ) -> Option<CheckedTimestamp<DateTime<Utc>>>

pub fn welcome_message(&self) -> bool

Returns the value of the welcome_message configuration parameter.

Trait Implementations§

impl Clone for SessionVars

fn clone(&self) -> SessionVars

Returns a copy of the value. Read more

1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for SessionVars

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

Auto Trait Implementations§

impl !UnwindSafe for SessionVars

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