Crate delta_kernel_derive 

Macros

parse_column_name

Parses a dot-delimited column name into an array of field names. See delta_kernel::expressions::column_name::column_name macro for details.

Attribute Macros

internal_api

Mark items as internal_api to make them public iff the internal-api feature is enabled. Note this doesn’t work for inline module definitions (see internal_mod! macro in delta_kernel crate - can’t export macro_rules! from proc macro crate). Ref: https://github.com/rust-lang/rust/issues/54727

Derive Macros

IntoEngineData

Derive an IntoEngineData trait for a struct that has all fields implement Into<Scalar>.

ToSchema

Derive a delta_kernel::schemas::ToSchema implementation for the annotated struct. The actual field names in the schema (and therefore of the struct members) are all mandated by the Delta spec, and so the user of this macro is responsible for ensuring that e.g. Metadata::schema_string is the snake_case-ified version of schemaString from Delta’s Change Metadata action (this macro allows the use of standard rust snake_case, and will convert to the correct delta schema camelCase version).