Portal

risingwave_frontend::handler::extended_handle

Enum Portal 

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pub enum Portal {
    Empty,
    Portal(PortalResult),
    PureStatement(Statement),
}
Expand description

Partial was a concept in the PostgreSQL protocol.

In the extended-query protocol, execution of SQL commands is divided into multiple steps. The state retained between steps is represented by two types of objects: prepared statements and portals. A prepared statement represents the result of parsing and semantic analysis of a textual query string. A prepared statement is not in itself ready to execute, because it might lack specific values for parameters. A portal represents a ready-to-execute or already-partially-executed statement, with any missing parameter values filled in.

Reference: https://www.postgresql.org/docs/current/protocol-overview.html#PROTOCOL-QUERY-CONCEPTS

Variants§

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Empty

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Portal(PortalResult)

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PureStatement(Statement)

Trait Implementations§

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impl Clone for Portal

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fn clone(&self) -> Portal

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Display for Portal

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl Freeze for Portal

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impl !RefUnwindSafe for Portal

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impl Send for Portal

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impl Sync for Portal

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impl Unpin for Portal

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impl !UnwindSafe for Portal

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