Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456
CatalogOptions in datafusion::config - Rust
[go: Go Back, main page]

#[non_exhaustive]
pub struct CatalogOptions { pub create_default_catalog_and_schema: bool, pub default_catalog: String, pub default_schema: String, pub information_schema: bool, pub location: Option<String>, pub format: Option<String>, pub has_header: bool, }
Expand description

Options related to catalog and directory scanning

Fields (Non-exhaustive)§

This struct is marked as non-exhaustive
Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.
§create_default_catalog_and_schema: bool

Number of partitions for query execution. Increasing partitions can increase concurrency. Defaults to the number of cpu cores on the system.

§default_catalog: String

The default catalog name - this impacts what SQL queries use if not specified

§default_schema: String

The default schema name - this impacts what SQL queries use if not specified

§information_schema: bool

Should DataFusion provide access to information_schema virtual tables for displaying schema information

§location: Option<String>

Location scanned to load tables for default schema

§format: Option<String>

Type of TableProvider to use when loading default schema

§has_header: bool

If the file has a header

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Should always be Self
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.