icydb-core 0.262.2

IcyDB — A schema-first typed query engine and persistence runtime for Internet Computer canisters
Documentation 
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//! Copy admitted predicate models under the existing request, without invoking
//! constructors that normalize field ordering or simplify boolean structure.

use crate::db::{
    predicate::{CompareFieldsPredicate, ComparePredicate, Predicate},
    query::construction::ConstructionBudget,
};
use crate::error::InternalError;
use icydb_diagnostic_code::DiagnosticExecutionBudgetResource as Resource;

impl dyn ConstructionBudget + '_ {
    /// Copy canonical syntax without changing the model used for identity.
    /// The caller must admit depth before entering this recursive copy owner.
    pub(in crate::db) fn copy_predicate(
        &self,
        predicate: &Predicate,
    ) -> Result<Predicate, InternalError> {
        self.charge(Resource::PredicateExpressionSteps, 1)?;
        Ok(match predicate {
            Predicate::True => Predicate::True,
            Predicate::False => Predicate::False,
            Predicate::And(children) => {
                Predicate::And(self.copy_slice(children, |child| self.copy_predicate(child))?)
            }
            Predicate::Or(children) => {
                Predicate::Or(self.copy_slice(children, |child| self.copy_predicate(child))?)
            }
            Predicate::Not(inner) => {
                self.charge(Resource::TemporaryBytes, size_of::<Predicate>() as u64)?;
                Predicate::Not(Box::new(self.copy_predicate(inner)?))
            }
            Predicate::Compare(compare) => Predicate::Compare(ComparePredicate {
                field: self.copy_text(&compare.field)?,
                op: compare.op,
                value: self.copy_value(&compare.value)?,
                coercion: compare.coercion.clone(),
            }),
            Predicate::CompareFields(compare) => Predicate::CompareFields(CompareFieldsPredicate {
                left_field: self.copy_text(compare.left_field())?,
                op: compare.op(),
                right_field: self.copy_text(compare.right_field())?,
                coercion: compare.coercion().clone(),
            }),
            Predicate::IsNull { field } => Predicate::IsNull {
                field: self.copy_text(field)?,
            },
            Predicate::IsNotNull { field } => Predicate::IsNotNull {
                field: self.copy_text(field)?,
            },
            Predicate::IsMissing { field } => Predicate::IsMissing {
                field: self.copy_text(field)?,
            },
            Predicate::IsEmpty { field } => Predicate::IsEmpty {
                field: self.copy_text(field)?,
            },
            Predicate::IsNotEmpty { field } => Predicate::IsNotEmpty {
                field: self.copy_text(field)?,
            },
            Predicate::TextContains { field, value } => Predicate::TextContains {
                field: self.copy_text(field)?,
                value: self.copy_value(value)?,
            },
            Predicate::TextContainsCi { field, value } => Predicate::TextContainsCi {
                field: self.copy_text(field)?,
                value: self.copy_value(value)?,
            },
        })
    }
}