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Support for Postgres array slice syntax (#1290)

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Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>
This commit is contained in:
Joey Hain 2024-05-31 14:38:35 -07:00 • committed by GitHub
parent 80c03f5c6a
commit afa5f08db9
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5 changed files with 356 additions and 61 deletions
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200
tests/sqlparser_postgres.rs
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@ -1873,9 +1873,11 @@ fn parse_array_index_expr() {
let sql = "SELECT foo[0] FROM foos";
let select = pg_and_generic().verified_only_select(sql);
assert_eq!(
&Expr::ArrayIndex {
obj: Box::new(Expr::Identifier(Ident::new("foo"))),
indexes: vec![num[0].clone()],
&Expr::Subscript {
expr: Box::new(Expr::Identifier(Ident::new("foo"))),
subscript: Box::new(Subscript::Index {
index: num[0].clone()
}),
},
expr_from_projection(only(&select.projection)),
);
@ -1883,9 +1885,16 @@ fn parse_array_index_expr() {
let sql = "SELECT foo[0][0] FROM foos";
let select = pg_and_generic().verified_only_select(sql);
assert_eq!(
&Expr::ArrayIndex {
obj: Box::new(Expr::Identifier(Ident::new("foo"))),
indexes: vec![num[0].clone(), num[0].clone()],
&Expr::Subscript {
expr: Box::new(Expr::Subscript {
expr: Box::new(Expr::Identifier(Ident::new("foo"))),
subscript: Box::new(Subscript::Index {
index: num[0].clone()
}),
}),
subscript: Box::new(Subscript::Index {
index: num[0].clone()
}),
},
expr_from_projection(only(&select.projection)),
);
@ -1893,19 +1902,27 @@ fn parse_array_index_expr() {
let sql = r#"SELECT bar[0]["baz"]["fooz"] FROM foos"#;
let select = pg_and_generic().verified_only_select(sql);
assert_eq!(
&Expr::ArrayIndex {
obj: Box::new(Expr::Identifier(Ident::new("bar"))),
indexes: vec![
num[0].clone(),
Expr::Identifier(Ident {
value: "baz".to_string(),
quote_style: Some('"')
&Expr::Subscript {
expr: Box::new(Expr::Subscript {
expr: Box::new(Expr::Subscript {
expr: Box::new(Expr::Identifier(Ident::new("bar"))),
subscript: Box::new(Subscript::Index {
index: num[0].clone()
})
}),
Expr::Identifier(Ident {
subscript: Box::new(Subscript::Index {
index: Expr::Identifier(Ident {
value: "baz".to_string(),
quote_style: Some('"')
})
})
}),
subscript: Box::new(Subscript::Index {
index: Expr::Identifier(Ident {
value: "fooz".to_string(),
quote_style: Some('"')
})
],
})
},
expr_from_projection(only(&select.projection)),
);
@ -1913,26 +1930,33 @@ fn parse_array_index_expr() {
let sql = "SELECT (CAST(ARRAY[ARRAY[2, 3]] AS INT[][]))[1][2]";
let select = pg_and_generic().verified_only_select(sql);
assert_eq!(
&Expr::ArrayIndex {
obj: Box::new(Expr::Nested(Box::new(Expr::Cast {
kind: CastKind::Cast,
expr: Box::new(Expr::Array(Array {
elem: vec![Expr::Array(Array {
elem: vec![num[2].clone(), num[3].clone(),],
&Expr::Subscript {
expr: Box::new(Expr::Subscript {
expr: Box::new(Expr::Nested(Box::new(Expr::Cast {
kind: CastKind::Cast,
expr: Box::new(Expr::Array(Array {
elem: vec![Expr::Array(Array {
elem: vec![num[2].clone(), num[3].clone(),],
named: true,
})],
named: true,
})],
named: true,
})),
data_type: DataType::Array(ArrayElemTypeDef::SquareBracket(
Box::new(DataType::Array(ArrayElemTypeDef::SquareBracket(
Box::new(DataType::Int(None)),
})),
data_type: DataType::Array(ArrayElemTypeDef::SquareBracket(
Box::new(DataType::Array(ArrayElemTypeDef::SquareBracket(
Box::new(DataType::Int(None)),
None
))),
None
))),
None
)),
format: None,
}))),
indexes: vec![num[1].clone(), num[2].clone()],
)),
format: None,
}))),
subscript: Box::new(Subscript::Index {
index: num[1].clone()
}),
}),
subscript: Box::new(Subscript::Index {
index: num[2].clone()
}),
},
expr_from_projection(only(&select.projection)),
);
@ -1948,6 +1972,116 @@ fn parse_array_index_expr() {
);
}
#[test]
fn parse_array_subscript() {
let tests = [
(
"(ARRAY[1, 2, 3, 4, 5, 6])[2]",
Subscript::Index {
index: Expr::Value(number("2")),
},
),
(
"(ARRAY[1, 2, 3, 4, 5, 6])[foo]",
Subscript::Index {
index: Expr::Identifier(Ident::new("foo")),
},
),
(
"(ARRAY[1, 2, 3, 4, 5, 6])[2:5]",
Subscript::Slice {
lower_bound: Some(Expr::Value(number("2"))),
upper_bound: Some(Expr::Value(number("5"))),
stride: None,
},
),
(
"(ARRAY[1, 2, 3, 4, 5, 6])[2:5:3]",
Subscript::Slice {
lower_bound: Some(Expr::Value(number("2"))),
upper_bound: Some(Expr::Value(number("5"))),
stride: Some(Expr::Value(number("3"))),
},
),
(
"arr[array_length(arr) - 3:array_length(arr) - 1]",
Subscript::Slice {
lower_bound: Some(Expr::BinaryOp {
left: Box::new(call("array_length", [Expr::Identifier(Ident::new("arr"))])),
op: BinaryOperator::Minus,
right: Box::new(Expr::Value(number("3"))),
}),
upper_bound: Some(Expr::BinaryOp {
left: Box::new(call("array_length", [Expr::Identifier(Ident::new("arr"))])),
op: BinaryOperator::Minus,
right: Box::new(Expr::Value(number("1"))),
}),
stride: None,
},
),
(
"(ARRAY[1, 2, 3, 4, 5, 6])[:5]",
Subscript::Slice {
lower_bound: None,
upper_bound: Some(Expr::Value(number("5"))),
stride: None,
},
),
(
"(ARRAY[1, 2, 3, 4, 5, 6])[2:]",
Subscript::Slice {
lower_bound: Some(Expr::Value(number("2"))),
upper_bound: None,
stride: None,
},
),
(
"(ARRAY[1, 2, 3, 4, 5, 6])[:]",
Subscript::Slice {
lower_bound: None,
upper_bound: None,
stride: None,
},
),
];
for (sql, expect) in tests {
let Expr::Subscript { subscript, .. } = pg_and_generic().verified_expr(sql) else {
panic!("expected subscript expr");
};
assert_eq!(expect, *subscript);
}
pg_and_generic().verified_expr("schedule[:2][2:]");
}
#[test]
fn parse_array_multi_subscript() {
let expr = pg_and_generic().verified_expr("make_array(1, 2, 3)[1:2][2]");
assert_eq!(
Expr::Subscript {
expr: Box::new(Expr::Subscript {
expr: Box::new(call(
"make_array",
vec![
Expr::Value(number("1")),
Expr::Value(number("2")),
Expr::Value(number("3"))
]
)),
subscript: Box::new(Subscript::Slice {
lower_bound: Some(Expr::Value(number("1"))),
upper_bound: Some(Expr::Value(number("2"))),
stride: None,
}),
}),
subscript: Box::new(Subscript::Index {
index: Expr::Value(number("2")),
}),
},
expr,
);
}
#[test]
fn parse_create_index() {
let sql = "CREATE INDEX IF NOT EXISTS my_index ON my_table(col1,col2)";