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Add support for "on delete cascade" column option (#170)

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Specifically, `FOREIGN KEY REFERENCES <foreign_table> (<referred_columns>)`
can now be followed by `ON DELETE <referential_action>` and/or by
`ON UPDATE <referential_action>`.
This commit is contained in:
Christoph Müller 2020-05-27 17:24:23 +02:00 • committed by GitHub
parent 789fcc8521
commit 98f97d09db
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5 changed files with 131 additions and 11 deletions
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49
tests/sqlparser_common.rs
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@ -893,7 +893,9 @@ fn parse_create_table() {
lat DOUBLE NULL,\
lng DOUBLE,
constrained INT NULL CONSTRAINT pkey PRIMARY KEY NOT NULL UNIQUE CHECK (constrained > 0),
ref INT REFERENCES othertable (a, b))";
ref INT REFERENCES othertable (a, b),\
ref2 INT references othertable2 on delete cascade on update no action\
)";
let ast = one_statement_parses_to(
sql,
"CREATE TABLE uk_cities (\
@ -901,7 +903,8 @@ fn parse_create_table() {
lat double NULL, \
lng double, \
constrained int NULL CONSTRAINT pkey PRIMARY KEY NOT NULL UNIQUE CHECK (constrained > 0), \
ref int REFERENCES othertable (a, b))",
ref int REFERENCES othertable (a, b), \
ref2 int REFERENCES othertable2 ON DELETE CASCADE ON UPDATE NO ACTION)",
);
match ast {
Statement::CreateTable {
@ -978,8 +981,24 @@ fn parse_create_table() {
option: ColumnOption::ForeignKey {
foreign_table: ObjectName(vec!["othertable".into()]),
referred_columns: vec!["a".into(), "b".into(),],
on_delete: None,
on_update: None,
}
}]
},
ColumnDef {
name: "ref2".into(),
data_type: DataType::Int,
collation: None,
options: vec![ColumnOptionDef {
name: None,
option: ColumnOption::ForeignKey {
foreign_table: ObjectName(vec!["othertable2".into()]),
referred_columns: vec![],
on_delete: Some(ReferentialAction::Cascade),
on_update: Some(ReferentialAction::NoAction),
}
},]
}
]
);
@ -996,6 +1015,32 @@ fn parse_create_table() {
.contains("Expected column option, found: GARBAGE"));
}
#[test]
fn parse_create_table_with_multiple_on_delete_fails() {
parse_sql_statements(
"\
create table X (\
y_id int references Y (id) \
on delete cascade on update cascade on delete no action\
)",
)
.expect_err("should have failed");
}
#[test]
fn parse_create_table_with_on_delete_on_update_2in_any_order() -> Result<(), ParserError> {
let sql = |options: &str| -> String {
format!("create table X (y_id int references Y (id) {})", options)
};
parse_sql_statements(&sql("on update cascade on delete no action"))?;
parse_sql_statements(&sql("on delete cascade on update cascade"))?;
parse_sql_statements(&sql("on update no action"))?;
parse_sql_statements(&sql("on delete restrict"))?;
Ok(())
}
#[test]
fn parse_create_table_with_options() {
let sql = "CREATE TABLE t (c int) WITH (foo = 'bar', a = 123)";