Struct datafusion_expr::logical_plan::DescribeTable

pub struct DescribeTable {
    pub schema: Arc<Schema>,
    pub output_schema: DFSchemaRef,
}

Describe the schema of table

Example output:

> describe traces;
+--------------------+-----------------------------+-------------+
| column_name        | data_type                   | is_nullable |
+--------------------+-----------------------------+-------------+
| attributes         | Utf8                        | YES         |
| duration_nano      | Int64                       | YES         |
| end_time_unix_nano | Int64                       | YES         |
| service.name       | Dictionary(Int32, Utf8)     | YES         |
| span.kind          | Utf8                        | YES         |
| span.name          | Utf8                        | YES         |
| span_id            | Dictionary(Int32, Utf8)     | YES         |
| time               | Timestamp(Nanosecond, None) | NO          |
| trace_id           | Dictionary(Int32, Utf8)     | YES         |
| otel.status_code   | Utf8                        | YES         |
| parent_span_id     | Utf8                        | YES         |
+--------------------+-----------------------------+-------------+

Fields

schema: Arc<Schema>

Table schema

output_schema: DFSchemaRef

schema of describe table output

Trait Implementations

impl Clone for DescribeTable

fn clone(&self) -> DescribeTable

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DescribeTable

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

Formats the value using the given formatter.

impl Hash for DescribeTable

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DescribeTable

fn eq(&self, other: &DescribeTable) -> 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 Eq for DescribeTable

impl StructuralPartialEq for DescribeTable