Enum SchemaChange 

pub enum SchemaChange {
    AddColumn {
        name: String,
        column_type: SochType,
        default: SochValue,
        position: Option<usize>,
    },
    DropColumn {
        name: String,
    },
    RenameColumn {
        old_name: String,
        new_name: String,
    },
    ChangeType {
        name: String,
        new_type: SochType,
        converter: TypeConverter,
    },
    ReorderColumns {
        new_order: Vec<String>,
    },
}

Describes a single schema change operation

Variants

AddColumn

Add a new column with default value

Fields

name: String

column_type: SochType

default: SochValue

position: Option<usize>

DropColumn

Drop an existing column

Fields

name: String

RenameColumn

Rename a column

Fields

old_name: String

new_name: String

ChangeType

Change column type with conversion function

Fields

name: String

new_type: SochType

converter: TypeConverter

ReorderColumns

Reorder columns

Fields

new_order: Vec<String>

Trait Implementations

impl Clone for SchemaChange

fn clone(&self) -> SchemaChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SchemaChange

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

Formats the value using the given formatter.