Struct GpkgMetadataReference 

pub struct GpkgMetadataReference {
    pub reference_scope: ReferenceScope,
    pub table_name: Option<String>,
    pub column_name: Option<String>,
    pub row_id_value: Option<i64>,
    pub timestamp: String,
    pub md_file_id: i64,
    pub md_parent_id: Option<i64>,
}

A row from the gpkg_metadata_reference table (OGC GeoPackage §10.8.5, Table 18).

Links a GpkgMetadata record (via md_file_id) to the database object it describes. Nullable columns are represented as Option<_>.

Column layout:

#	Column	Type	Nullable
0	reference_scope	TEXT	No
1	table_name	TEXT	Yes
2	column_name	TEXT	Yes
3	row_id_value	INTEGER	Yes
4	timestamp	DATETIME (TEXT)	No
5	md_file_id	INTEGER	No (FK)
6	md_parent_id	INTEGER	Yes (FK)

Fields

reference_scope: ReferenceScope

Scope of the reference (geopackage / table / column / row / row/col).

table_name: Option<String>

User-data table name; None when reference_scope is "geopackage".

column_name: Option<String>

Column name within table_name; None unless scope is "column" or "row/col".

row_id_value: Option<i64>

Row identifier within table_name; None unless scope is "row" or "row/col".

timestamp: String

ISO 8601 timestamp of when the reference was last updated.

md_file_id: i64

Foreign key into gpkg_metadata.id — the referenced metadata record.

md_parent_id: Option<i64>

Optional foreign key into gpkg_metadata.id — the parent metadata record in a hierarchical metadata graph.

Trait Implementations

impl Clone for GpkgMetadataReference

fn clone(&self) -> GpkgMetadataReference

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GpkgMetadataReference

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

Formats the value using the given formatter.

impl PartialEq for GpkgMetadataReference

fn eq(&self, other: &GpkgMetadataReference) -> 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 GpkgMetadataReference