Struct jupiter::idb::table::Table

pub struct Table { /* private fields */ }

Wraps a crate::ig::docs::Doc and permits to execute fast lookups backed by a Trie.

Note that this is the work horse of the InfoGraphDB.

Implementations

impl Table

pub fn new(doc: Doc, indices: Vec<IndexType>) -> Result<Self>

Creates a new table from the given doc while building a lookup index for the given paths.

Note that each value in indices can be a path like field.inner.other.

pub fn compile(&self, query: impl AsRef<str>) -> Query

Compiles the given field or path name into a fast lookup query which extracts the matching value from a given doc.

pub fn query<'a>( &'a self, fields: &'a str, value: &'a str, exact: bool ) -> Result<TableIter<'a>>

Executes a query by searching for the given value in the given list of fields (see determine_search_fields).

If exact is true, the given value must match the field contents, otherwise it can also be a token or even the prefix of a token within the exact or loose index values of the selected fields.

Returns an iterator which yields all matching docs or an error, if a search query is executed against non-indexed fields.

pub fn table_scan(&self) -> TableIter<'_>

Performs a table scan which simply iterates over all rows of a table.

pub fn len(&self) -> usize

Returns the number of rows in the table.

pub fn is_empty(&self) -> bool

Determines if this table is empty.

pub fn num_queries(&self) -> usize

Returns the number of queries which have been executed against this table.

pub fn num_scan_queries(&self) -> usize

Returns the number of queries which have resorted to a table scan in order to execute properly.

pub fn num_scans(&self) -> usize

Returns the number of deliberate table scans.

pub fn allocated_memory(&self) -> usize

Estimates the allocated memory for both, the table data and its index.

The returned value is in bytes.

pub fn default_lang_query(&self) -> &Query

Returns the selector or query for the fallback/default language (“xx”).