Struct Partial 

pub struct Partial {
    pub table: String,
    pub where_sql: String,
    pub column_types: ColumnTypes,
}

A partial-pushdown plan: the leading row predicates as a WHERE clause for table’s fetch. The caller runs the original query against the filtered adapter — the engine re-applies the pushed predicates (a no-op on pre-filtered rows), so no rewriting.

Fields

table: String

where_sql: String

column_types: ColumnTypes

As Pushdown::column_types: the prefilter keeps every row the scan would only where these assumptions hold.