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mod argument;
mod operator;
mod returning;
pub use argument::PgExternArgumentEntity;
pub use operator::PgOperatorEntity;
pub use returning::PgExternReturnEntity;
use crate::{
sql_entity_graph::{
extension_sql::SqlDeclared,
pgx_sql::PgxSql,
to_sql::{entity::ToSqlConfigEntity, ToSql},
SqlGraphEntity, SqlGraphIdentifier,
},
ExternArgs,
};
use eyre::eyre;
use std::cmp::Ordering;
#[derive(Debug, Clone, Hash, PartialEq, Eq)]
pub struct PgExternEntity {
pub name: &'static str,
pub unaliased_name: &'static str,
pub schema: Option<&'static str>,
pub file: &'static str,
pub line: u32,
pub module_path: &'static str,
pub full_path: &'static str,
pub extern_attrs: Vec<ExternArgs>,
pub search_path: Option<Vec<&'static str>>,
pub fn_args: Vec<PgExternArgumentEntity>,
pub fn_return: PgExternReturnEntity,
pub operator: Option<PgOperatorEntity>,
pub to_sql_config: ToSqlConfigEntity,
}
impl Ord for PgExternEntity {
fn cmp(&self, other: &Self) -> Ordering {
self.file
.cmp(other.file)
.then_with(|| self.file.cmp(other.file))
}
}
impl PartialOrd for PgExternEntity {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Into<SqlGraphEntity> for PgExternEntity {
fn into(self) -> SqlGraphEntity {
SqlGraphEntity::Function(self)
}
}
impl SqlGraphIdentifier for PgExternEntity {
fn dot_identifier(&self) -> String {
format!("fn {}", self.full_path)
}
fn rust_identifier(&self) -> String {
self.full_path.to_string()
}
fn file(&self) -> Option<&'static str> {
Some(self.file)
}
fn line(&self) -> Option<u32> {
Some(self.line)
}
}
impl ToSql for PgExternEntity {
#[tracing::instrument(
level = "error",
skip(self, context),
fields(identifier = %self.rust_identifier()),
)]
fn to_sql(&self, context: &PgxSql) -> eyre::Result<String> {
let self_index = context.externs[self];
let mut extern_attrs = self.extern_attrs.clone();
let mut strict_upgrade = !extern_attrs.iter().any(|i| i == &ExternArgs::Strict);
if strict_upgrade {
for arg in &self.fn_args {
if arg.is_optional {
strict_upgrade = false;
}
}
}
if strict_upgrade {
extern_attrs.push(ExternArgs::Strict);
}
let fn_sql = format!("\
CREATE OR REPLACE FUNCTION {schema}\"{name}\"({arguments}) {returns}\n\
{extern_attrs}\
{search_path}\
LANGUAGE c /* Rust */\n\
AS 'MODULE_PATHNAME', '{unaliased_name}_wrapper';\
",
schema = self.schema.map(|schema| format!("{}.", schema)).unwrap_or_else(|| context.schema_prefix_for(&self_index)),
name = self.name,
unaliased_name = self.unaliased_name,
arguments = if !self.fn_args.is_empty() {
let mut args = Vec::new();
for (idx, arg) in self.fn_args.iter().enumerate() {
let graph_index = context.graph.neighbors_undirected(self_index).find(|neighbor| match &context.graph[*neighbor] {
SqlGraphEntity::Type(ty) => ty.id_matches(&arg.ty_id),
SqlGraphEntity::Enum(en) => en.id_matches(&arg.ty_id),
SqlGraphEntity::BuiltinType(defined) => defined == &arg.full_path,
_ => false,
}).ok_or_else(|| eyre!("Could not find arg type in graph. Got: {:?}", arg))?;
let needs_comma = idx < (self.fn_args.len() - 1);
let buf = format!("\
\t\"{pattern}\" {variadic}{schema_prefix}{sql_type}{default}{maybe_comma}/* {full_path} */\
",
pattern = arg.pattern,
schema_prefix = context.schema_prefix_for(&graph_index),
sql_type = context.rust_to_sql(arg.ty_id, arg.ty_source, arg.full_path).ok_or_else(|| eyre!(
"Failed to map argument `{}` type `{}` to SQL type while building function `{}`.",
arg.pattern,
arg.full_path,
self.name
))?,
default = if let Some(def) = arg.default { format!(" DEFAULT {}", def) } else { String::from("") },
variadic = if arg.is_variadic { "VARIADIC " } else { "" },
maybe_comma = if needs_comma { ", " } else { " " },
full_path = arg.full_path,
);
args.push(buf);
};
String::from("\n") + &args.join("\n") + "\n"
} else { Default::default() },
returns = match &self.fn_return {
PgExternReturnEntity::None => String::from("RETURNS void"),
PgExternReturnEntity::Type { id, source, full_path, .. } => {
let graph_index = context.graph.neighbors_undirected(self_index).find(|neighbor| match &context.graph[*neighbor] {
SqlGraphEntity::Type(ty) => ty.id_matches(&id),
SqlGraphEntity::Enum(en) => en.id_matches(&id),
SqlGraphEntity::BuiltinType(defined) => &*defined == full_path,
_ => false,
}).ok_or_else(|| eyre!("Could not find return type in graph."))?;
format!("RETURNS {schema_prefix}{sql_type} /* {full_path} */",
sql_type = context.source_only_to_sql_type(source).or_else(|| {
context.type_id_to_sql_type(*id)
}).or_else(|| {
let pat = full_path.to_string();
if let Some(found) = context.has_sql_declared_entity(&SqlDeclared::Type(pat.clone())) {
Some(found.sql())
} else if let Some(found) = context.has_sql_declared_entity(&SqlDeclared::Enum(pat.clone())) {
Some(found.sql())
} else {
None
}
}).ok_or_else(|| eyre!("Failed to map return type `{}` to SQL type while building function `{}`.", full_path, self.full_path))?,
schema_prefix = context.schema_prefix_for(&graph_index),
full_path = full_path
)
},
PgExternReturnEntity::SetOf { id, source, full_path, .. } => {
let graph_index = context.graph.neighbors_undirected(self_index).find(|neighbor| match &context.graph[*neighbor] {
SqlGraphEntity::Type(ty) => ty.id_matches(&id),
SqlGraphEntity::Enum(en) => en.id_matches(&id),
SqlGraphEntity::BuiltinType(defined) => defined == full_path,
_ => false,
}).ok_or_else(|| eyre!("Could not find return type in graph."))?;
format!("RETURNS SETOF {schema_prefix}{sql_type} /* {full_path} */",
sql_type = context.source_only_to_sql_type(source).or_else(|| {
context.type_id_to_sql_type(*id)
}).or_else(|| {
let pat = full_path.to_string();
if let Some(found) = context.has_sql_declared_entity(&SqlDeclared::Type(pat.clone())) {
Some(found.sql())
} else if let Some(found) = context.has_sql_declared_entity(&SqlDeclared::Enum(pat.clone())) {
Some(found.sql())
} else {
None
}
}).ok_or_else(|| eyre!("Failed to map return type `{}` to SQL type while building function `{}`.", full_path, self.full_path))?,
schema_prefix = context.schema_prefix_for(&graph_index),
full_path = full_path
)
},
PgExternReturnEntity::Iterated(table_items) => {
let mut items = String::new();
for (idx, (id, source, ty_name, _module_path, col_name)) in table_items.iter().enumerate() {
let graph_index = context.graph.neighbors_undirected(self_index).find(|neighbor| match &context.graph[*neighbor] {
SqlGraphEntity::Type(ty) => ty.id_matches(&id),
SqlGraphEntity::Enum(en) => en.id_matches(&id),
SqlGraphEntity::BuiltinType(defined) => defined == ty_name,
_ => false,
});
let needs_comma = idx < (table_items.len() - 1);
let item = format!("\n\t{col_name} {schema_prefix}{ty_resolved}{needs_comma} /* {ty_name} */",
col_name = col_name.expect("An iterator of tuples should have `named!()` macro declarations."),
schema_prefix = if let Some(graph_index) = graph_index {
context.schema_prefix_for(&graph_index)
} else { "".into() },
ty_resolved = context.source_only_to_sql_type(source).or_else(|| {
context.type_id_to_sql_type(*id)
}).or_else(|| {
let pat = ty_name.to_string();
if let Some(found) = context.has_sql_declared_entity(&SqlDeclared::Type(pat.clone())) {
Some(found.sql())
} else if let Some(found) = context.has_sql_declared_entity(&SqlDeclared::Enum(pat.clone())) {
Some(found.sql())
} else {
None
}
}).ok_or_else(|| eyre!("Failed to map return type `{}` to SQL type while building function `{}`.", ty_name, self.name))?,
needs_comma = if needs_comma { ", " } else { " " },
ty_name = ty_name
);
items.push_str(&item);
}
format!("RETURNS TABLE ({}\n)", items)
},
PgExternReturnEntity::Trigger => String::from("RETURNS trigger"),
},
search_path = if let Some(search_path) = &self.search_path {
let retval = format!("SET search_path TO {}", search_path.join(", "));
retval + "\n"
} else { Default::default() },
extern_attrs = if extern_attrs.is_empty() {
String::default()
} else {
let mut retval = extern_attrs.iter().map(|attr| format!("{}", attr).to_uppercase()).collect::<Vec<_>>().join(" ");
retval.push('\n');
retval
},
);
let ext_sql = format!(
"\n\
-- {file}:{line}\n\
-- {module_path}::{name}\n\
{requires}\
{fn_sql}\
",
name = self.name,
module_path = self.module_path,
file = self.file,
line = self.line,
fn_sql = fn_sql,
requires = {
let requires_attrs = self
.extern_attrs
.iter()
.filter_map(|x| match x {
ExternArgs::Requires(requirements) => Some(requirements),
_ => None,
})
.flatten()
.collect::<Vec<_>>();
if !requires_attrs.is_empty() {
format!(
"\
-- requires:\n\
{}\n\
",
requires_attrs
.iter()
.map(|i| format!("-- {}", i))
.collect::<Vec<_>>()
.join("\n")
)
} else {
"".to_string()
}
},
);
tracing::trace!(sql = %ext_sql);
let rendered = if let Some(op) = &self.operator {
let mut optionals = vec![];
if let Some(it) = op.commutator {
optionals.push(format!("\tCOMMUTATOR = {}", it));
};
if let Some(it) = op.negator {
optionals.push(format!("\tNEGATOR = {}", it));
};
if let Some(it) = op.restrict {
optionals.push(format!("\tRESTRICT = {}", it));
};
if let Some(it) = op.join {
optionals.push(format!("\tJOIN = {}", it));
};
if op.hashes {
optionals.push(String::from("\tHASHES"));
};
if op.merges {
optionals.push(String::from("\tMERGES"));
};
let left_arg = self
.fn_args
.get(0)
.ok_or_else(|| eyre!("Did not find `left_arg` for operator `{}`.", self.name))?;
let left_arg_graph_index = context
.graph
.neighbors_undirected(self_index)
.find(|neighbor| match &context.graph[*neighbor] {
SqlGraphEntity::Type(ty) => ty.id_matches(&left_arg.ty_id),
_ => false,
})
.ok_or_else(|| eyre!("Could not find left arg function in graph."))?;
let right_arg = self
.fn_args
.get(1)
.ok_or_else(|| eyre!("Did not find `left_arg` for operator `{}`.", self.name))?;
let right_arg_graph_index = context
.graph
.neighbors_undirected(self_index)
.find(|neighbor| match &context.graph[*neighbor] {
SqlGraphEntity::Type(ty) => ty.id_matches(&right_arg.ty_id),
_ => false,
})
.ok_or_else(|| eyre!("Could not find right arg function in graph."))?;
let operator_sql = format!("\n\n\
-- {file}:{line}\n\
-- {module_path}::{unaliased_name}\n\
CREATE OPERATOR {opname} (\n\
\tPROCEDURE=\"{name}\",\n\
\tLEFTARG={schema_prefix_left}{left_arg}, /* {left_name} */\n\
\tRIGHTARG={schema_prefix_right}{right_arg}{maybe_comma} /* {right_name} */\n\
{optionals}\
);\
",
opname = op.opname.unwrap(),
file = self.file,
line = self.line,
name = self.name,
unaliased_name = self.unaliased_name,
module_path = self.module_path,
left_name = left_arg.full_path,
right_name = right_arg.full_path,
schema_prefix_left = context.schema_prefix_for(&left_arg_graph_index),
left_arg = context.type_id_to_sql_type(left_arg.ty_id).ok_or_else(|| eyre!("Failed to map argument `{}` type `{}` to SQL type while building operator `{}`.", left_arg.pattern, left_arg.full_path, self.name))?,
schema_prefix_right = context.schema_prefix_for(&right_arg_graph_index),
right_arg = context.type_id_to_sql_type(right_arg.ty_id).ok_or_else(|| eyre!("Failed to map argument `{}` type `{}` to SQL type while building operator `{}`.", right_arg.pattern, right_arg.full_path, self.name))?,
maybe_comma = if optionals.len() >= 1 { "," } else { "" },
optionals = if !optionals.is_empty() { optionals.join(",\n") + "\n" } else { "".to_string() },
);
tracing::trace!(sql = %operator_sql);
ext_sql + &operator_sql
} else {
ext_sql
};
Ok(rendered)
}
}
