Module session

Per-connection configuration parameters and state.

Structs

GroupCommitWriteLocks 🔒

Collection of WriteLocks gathered during group_commit.

InProgressRows

State of an in-progress, rows-returning portal.

LifecycleTimestamps

Part of statement lifecycle. These are timestamps that come from the Adapter frontend (mz-pgwire) part of the lifecycle.

Portal

A portal represents the execution state of a running or runnable query.

PortalRefMut

A mutable reference to a portal, capturing its state and associated metadata. Importantly, it does not give mutable access to stmt and desc, which means that you do not need to increment Session::state_revision when modifying fields through a PortalRefMut, because the portal’s meaning is not changed.

PreparedStatement

A prepared statement.

Session

A session holds per-connection state.

SessionConfig

Configures a new Session.

SessionMeta

Data structure suitable for passing to other threads that need access to some common Session properties.

SessionVars

Session variables.

StateRevision

Points to a revision of catalog state and session state. When the current revisions are not the same as the revisions when a prepared statement or a portal was described, we need to check whether the description is still valid.

Transaction

State data for transactions.

WriteLocks

A complete set of exclusive locks for writing to collections identified by CatalogItemIds.

WriteLocksBuilder

A builder struct that helps us acquire all of the locks we need, or none of them.

WriteOp

An INSERT waiting to be committed.

Enums

EndTransactionAction

The action to take during end_transaction.

PortalState

Execution states of a portal.

RequireLinearization

Whether a transaction requires linearization.

TransactionCode

A transaction’s status code.

TransactionOps

The type of operation being performed by the transaction.

TransactionStatus

The transaction status of a session.

Constants

DEFAULT_DATABASE_NAME

The name of the default database that Materialize uses.

DUMMY_CONNECTION_ID 🔒

SERVER_MAJOR_VERSION

The major version of PostgreSQL that Materialize claims to be.

SERVER_MINOR_VERSION

The minor version of PostgreSQL that Materialize claims to be.

SERVER_PATCH_VERSION

The patch version of PostgreSQL that Materialize claims to be.

Traits

Var

A Var represents a configuration parameter of an arbitrary type.

Type Aliases

RowBatchStream

A channel of batched rows.

TransactionId

An abstraction allowing us to identify different transactions.