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Post: reorganize cc.rs.

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Richard Newman 2017-03-20 15:54:23 +00:00
parent 7024978517
commit cb4ba9e68f
1 changed files with 59 additions and 54 deletions
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113
query-algebrizer/src/cc.rs
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@ -626,7 +626,62 @@ impl ConjoiningClauses {
}
}
/// Application.
/// Argument resolution.
impl ConjoiningClauses {
/// Take a function argument and turn it into a `QueryValue` suitable for use in a concrete
/// constraint.
/// Additionally, do two things:
/// - Mark the pattern as known-empty if any argument is known non-numeric.
/// - Mark any variables encountered as numeric.
fn resolve_numeric_argument(&mut self, function: &PlainSymbol, position: usize, arg: FnArg) -> Result<QueryValue> {
use self::FnArg::*;
match arg {
FnArg::Variable(var) => {
self.constrain_var_to_numeric(var.clone());
self.column_bindings
.get(&var)
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var)))
},
// Can't be an entid.
EntidOrInteger(i) => Ok(QueryValue::TypedValue(TypedValue::Long(i))),
Ident(_) |
SrcVar(_) |
Constant(NonIntegerConstant::Boolean(_)) |
Constant(NonIntegerConstant::Text(_)) |
Constant(NonIntegerConstant::BigInteger(_)) => {
self.mark_known_empty(EmptyBecause::NonNumericArgument);
bail!(ErrorKind::NonNumericArgument(function.clone(), position));
},
Constant(NonIntegerConstant::Float(f)) => Ok(QueryValue::TypedValue(TypedValue::Double(f))),
}
}
/// Take a function argument and turn it into a `QueryValue` suitable for use in a concrete
/// constraint.
#[allow(dead_code)]
fn resolve_argument(&self, arg: FnArg) -> Result<QueryValue> {
use self::FnArg::*;
match arg {
FnArg::Variable(var) => {
self.column_bindings
.get(&var)
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var)))
},
EntidOrInteger(i) => Ok(QueryValue::PrimitiveLong(i)),
Ident(_) => unimplemented!(), // TODO
Constant(NonIntegerConstant::Boolean(val)) => Ok(QueryValue::TypedValue(TypedValue::Boolean(val))),
Constant(NonIntegerConstant::Float(f)) => Ok(QueryValue::TypedValue(TypedValue::Double(f))),
Constant(NonIntegerConstant::Text(s)) => Ok(QueryValue::TypedValue(TypedValue::String(s.clone()))),
Constant(NonIntegerConstant::BigInteger(_)) => unimplemented!(),
SrcVar(_) => unimplemented!(),
}
}
}
/// Application of patterns.
impl ConjoiningClauses {
/// Apply the constraints in the provided pattern to this CC.
@ -854,60 +909,10 @@ impl ConjoiningClauses {
return;
}
}
}
/// Take a function argument and turn it into a `QueryValue` suitable for use in a concrete
/// constraint.
/// Additionally, do two things:
/// - Mark the pattern as known-empty if any argument is known non-numeric.
/// - Mark any variables encountered as numeric.
fn resolve_numeric_argument(&mut self, function: &PlainSymbol, position: usize, arg: FnArg) -> Result<QueryValue> {
use self::FnArg::*;
match arg {
FnArg::Variable(var) => {
self.constrain_var_to_numeric(var.clone());
self.column_bindings
.get(&var)
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var)))
},
// Can't be an entid.
EntidOrInteger(i) => Ok(QueryValue::TypedValue(TypedValue::Long(i))),
Ident(_) |
SrcVar(_) |
Constant(NonIntegerConstant::Boolean(_)) |
Constant(NonIntegerConstant::Text(_)) |
Constant(NonIntegerConstant::BigInteger(_)) => {
self.mark_known_empty(EmptyBecause::NonNumericArgument);
// We use Double because… well, we only have one slot!
bail!(ErrorKind::NonNumericArgument(function.clone(), position));
},
Constant(NonIntegerConstant::Float(f)) => Ok(QueryValue::TypedValue(TypedValue::Double(f))),
}
}
/// Take a function argument and turn it into a `QueryValue` suitable for use in a concrete
/// constraint.
#[allow(dead_code)]
fn resolve_argument(&self, arg: FnArg) -> Result<QueryValue> {
use self::FnArg::*;
match arg {
FnArg::Variable(var) => {
self.column_bindings
.get(&var)
.and_then(|cols| cols.first().map(|col| QueryValue::Column(col.clone())))
.ok_or_else(|| Error::from_kind(ErrorKind::UnboundVariable(var)))
},
EntidOrInteger(i) => Ok(QueryValue::PrimitiveLong(i)),
Ident(ref i) => unimplemented!(), // TODO
Constant(NonIntegerConstant::Boolean(val)) => Ok(QueryValue::TypedValue(TypedValue::Boolean(val))),
Constant(NonIntegerConstant::Float(f)) => Ok(QueryValue::TypedValue(TypedValue::Double(f))),
Constant(NonIntegerConstant::Text(s)) => Ok(QueryValue::TypedValue(TypedValue::String(s.clone()))),
Constant(NonIntegerConstant::BigInteger(_)) => unimplemented!(),
SrcVar(_) => unimplemented!(),
}
}
/// Application of predicates.
impl ConjoiningClauses {
/// There are several kinds of predicates/functions in our Datalog:
/// - A limited set of binary comparison operators: < > <= >= !=.
/// These are converted into SQLite binary comparisons and some type constraints.