Function try_parse

nodedb-sql/src/ddl_ast/parse/rls.rs:9–40

(
    upper: &str,
    parts: &[&str],
    trimmed: &str,
)

use crate::error::SqlError;

pub(super) fn try_parse(
    upper: &str,
    parts: &[&str],
    trimmed: &str,
) -> Option<Result<NodedbStatement, SqlError>> {
    (|| -> Result<Option<NodedbStatement>, SqlError> {
        if upper.starts_with("CREATE RLS POLICY ") {
            return Ok(Some(parse_create_rls_policy(upper, parts, trimmed)));
        }
        if upper.starts_with("DROP RLS POLICY ") {
            let if_exists = upper.contains("IF EXISTS");
            let name = match extract_name_after_if_exists(parts, "POLICY") {
                None => return Ok(None),
                Some(r) => r?,
            };
            let collection = extract_after_keyword(parts, "ON").unwrap_or_default();
            return Ok(Some(NodedbStatement::Policy(PolicyStmt::DropRlsPolicy {
                name,
                collection,
                if_exists,
            })));
        }
        if upper.starts_with("SHOW RLS POLI") {
            let collection = parts.get(3).map(|s| s.to_string());
            return Ok(Some(NodedbStatement::Policy(PolicyStmt::ShowRlsPolicies {
                collection,
            })));
        }
        Ok(None)
    })()
    .transpose()
}

/// `CREATE RLS POLICY <name> ON <collection> FOR <type> USING (<predicate>)
///     [RESTRICTIVE] [TENANT <id>] [ON DENY ...]`