marsdb-query 0.2.0

openCypher query subset parser, planner, and executor used internally by MarsDB.
Documentation 
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#[derive(Debug, thiserror::Error)]
pub enum QueryError {
    #[error("parse error: {0}")]
    Parse(String),
    #[error("graph error: {0}")]
    Graph(#[from] marsdb_graph::GraphError),
    #[error("unbound variable: {0}")]
    UnboundVariable(String),
    #[error("missing value for parameter: ${0}")]
    MissingParam(String),
}