Struct SqlCommand

pub struct SqlCommand {
    pub sql: String,
    pub args: HashMap<String, Literal>,
    pub pos_args: Vec<Literal>,
}

A SQL Command is used to trigger the eager evaluation of SQL commands in Spark.

When the SQL provide as part of the message is a command it will be immediately evaluated and the result will be collected and returned as part of a LocalRelation. If the result is not a command, the operation will simply return a SQL Relation. This allows the client to be almost oblivious to the server-side behavior.

Fields

sql: String

(Required) SQL Query.

args: HashMap<String, Literal>

(Optional) A map of parameter names to literal expressions.

pos_args: Vec<Literal>

(Optional) A sequence of literal expressions for positional parameters in the SQL query text.

Trait Implementations

impl Clone for SqlCommand

fn clone(&self) -> SqlCommand

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SqlCommand

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

Formats the value using the given formatter.

impl Default for SqlCommand

fn default() -> Self

Returns the “default value” for a type.

impl Message for SqlCommand

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>

where B: BufMut, Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>

where B: Buf, Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>

where B: Buf, Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for SqlCommand

fn eq(&self, other: &SqlCommand) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SqlCommand