Function query_from_information_schema_dataframe 

async fn query_from_information_schema_dataframe(
    query_engine: &QueryEngineRef,
    catalog_manager: &CatalogManagerRef,
    query_ctx: QueryContextRef,
    table_name: &str,
    select: Vec<Expr>,
    projects: Vec<(&str, &str)>,
    filters: Vec<Expr>,
    like_field: Option<&str>,
    sort: Vec<SortExpr>,
    kind: &ShowKind,
) -> Result<DataFrame>

Builds the [DataFrame] for a SHOW statement without executing it, so Describe handlers can derive the output schema from the same projection the executor uses.