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use super::*;
impl Renderer {
pub(super) fn render_bool(&mut self, expr: &BoolExpr) -> Result<()> {
match expr {
BoolExpr::Constant(value) => {
self.sql.push_str(if *value { "TRUE" } else { "FALSE" });
Ok(())
}
BoolExpr::Compare { left, op, right } => {
self.render_value(left)?;
self.sql.push(' ');
self.sql.push_str(op.as_sql());
self.sql.push(' ');
self.render_value(right)
}
BoolExpr::IsNull { expr, negated } => {
self.render_value(expr)?;
self.sql
.push_str(if *negated { " IS NOT NULL" } else { " IS NULL" });
Ok(())
}
BoolExpr::IsBoolean {
expr,
test,
negated,
} => {
self.render_value(expr)?;
self.sql
.push_str(if *negated { " IS NOT " } else { " IS " });
self.sql.push_str(test.as_sql());
Ok(())
}
BoolExpr::InList {
expr,
values,
negated,
} => {
self.render_value(expr)?;
self.sql
.push_str(if *negated { " NOT IN (" } else { " IN (" });
for (idx, value) in values.iter().enumerate() {
if idx > 0 {
self.sql.push_str(", ");
}
self.render_value(value)?;
}
self.sql.push(')');
Ok(())
}
BoolExpr::InSubquery {
expr,
query,
negated,
} => {
self.render_value(expr)?;
self.sql
.push_str(if *negated { " NOT IN (" } else { " IN (" });
self.render_stmt(query)?;
self.sql.push(')');
Ok(())
}
BoolExpr::Between {
expr,
low,
high,
negated,
} => {
self.render_value(expr)?;
self.sql.push_str(if *negated {
" NOT BETWEEN "
} else {
" BETWEEN "
});
self.render_value(low)?;
self.sql.push_str(" AND ");
self.render_value(high)
}
BoolExpr::Like {
expr,
pattern,
case_insensitive,
negated,
escape,
} => {
self.render_value(expr)?;
let op = match (*case_insensitive, *negated) {
(false, false) => " LIKE ",
(false, true) => " NOT LIKE ",
(true, false) => " ILIKE ",
(true, true) => " NOT ILIKE ",
};
self.sql.push_str(op);
self.render_value(pattern)?;
if *escape {
self.sql.push_str(" ESCAPE '\\'");
}
Ok(())
}
BoolExpr::SimilarTo {
expr,
pattern,
negated,
} => {
self.render_value(expr)?;
self.sql.push_str(if *negated {
" NOT SIMILAR TO "
} else {
" SIMILAR TO "
});
self.render_value(pattern)
}
BoolExpr::Regex {
expr,
pattern,
case_insensitive,
negated,
} => {
self.render_value(expr)?;
let op = match (case_insensitive, negated) {
(false, false) => " ~ ",
(false, true) => " !~ ",
(true, false) => " ~* ",
(true, true) => " !~* ",
};
self.sql.push_str(op);
self.render_value(pattern)
}
BoolExpr::Infix {
left,
op,
right,
negated,
} => {
if *negated {
self.sql.push_str("NOT (");
}
self.render_value(left)?;
self.sql.push(' ');
self.sql.push_str(op);
self.sql.push(' ');
self.render_value(right)?;
if *negated {
self.sql.push(')');
}
Ok(())
}
BoolExpr::Any {
value,
array,
negated,
} => {
if *negated {
self.sql.push_str("NOT (");
}
self.render_value(value)?;
self.sql.push_str(" = ANY(");
self.render_value(array)?;
self.sql.push(')');
if *negated {
self.sql.push(')');
}
Ok(())
}
BoolExpr::ArrayIsEmpty { expr, negated } => {
self.sql.push_str("cardinality(");
self.render_value(expr)?;
self.sql.push_str(if *negated { ") > 0" } else { ") = 0" });
Ok(())
}
BoolExpr::And(exprs) => self.render_bool_list("AND", exprs),
BoolExpr::Or(exprs) => self.render_bool_list("OR", exprs),
BoolExpr::Not(expr) => {
self.sql.push_str("NOT (");
self.render_bool(expr)?;
self.sql.push(')');
Ok(())
}
BoolExpr::Exists(stmt) => {
self.sql.push_str("EXISTS (");
self.render_stmt(stmt)?;
self.sql.push(')');
Ok(())
}
BoolExpr::Raw { sql, params } => self.render_raw(sql, params),
}
}
pub(super) fn render_bool_list(&mut self, op: &str, exprs: &[BoolExpr]) -> Result<()> {
self.sql.push('(');
for (idx, expr) in exprs.iter().enumerate() {
if idx > 0 {
self.sql.push(' ');
self.sql.push_str(op);
self.sql.push(' ');
}
self.render_bool(expr)?;
}
self.sql.push(')');
Ok(())
}
}