Struct CombinedSchema 

pub struct CombinedSchema {
    pub table_schemas: HashMap<String, (usize, TableSchema)>,
    pub total_columns: usize,
}

Represents the combined schema from multiple tables (for JOINs)

Fields

table_schemas: HashMap<String, (usize, TableSchema)>

Map from table name to (start_index, TableSchema) start_index is where this table’s columns begin in the combined row

total_columns: usize

Total number of columns across all tables

Implementations

impl CombinedSchema

pub fn from_table(table_name: String, schema: TableSchema) -> Self

Create a new combined schema from a single table

pub fn from_derived_table( alias: String, column_names: Vec<String>, column_types: Vec<DataType>, ) -> Self

Create a new combined schema from a derived table (subquery result)

pub fn combine( left: CombinedSchema, right_table: String, right_schema: TableSchema, ) -> Self

Combine two schemas (for JOIN operations)

pub fn get_column_index( &self, table: Option<&str>, column: &str, ) -> Option<usize>

Look up a column by name (optionally qualified with table name) Uses case-insensitive matching for table/alias and column names

Trait Implementations

impl Clone for CombinedSchema

fn clone(&self) -> CombinedSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CombinedSchema

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

Formats the value using the given formatter.