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Parse Snowflake structured ARRAY types #21

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Merged
osipovartem merged 1 commit into from
Sep 8, 2026
Merged

Parse Snowflake structured ARRAY types #21

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8 changes: 5 additions & 3 deletions src/parser/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -12629,12 +12629,14 @@ impl<'a> Parser<'a> {
Keyword::ENUM16 => Ok(DataType::Enum(self.parse_enum_values()?, Some(16))),
Keyword::SET => Ok(DataType::Set(self.parse_string_values()?)),
Keyword::ARRAY => {
if self.dialect.supports_array_typedef_without_element_type() {
Ok(DataType::Array(ArrayElemTypeDef::None))
} else if dialect_of!(self is ClickHouseDialect) {
if dialect_of!(self is ClickHouseDialect | SnowflakeDialect)
&& self.peek_token_ref().token == Token::LParen
{
Ok(self.parse_sub_type(|internal_type| {
DataType::Array(ArrayElemTypeDef::Parenthesis(internal_type))
})?)
} else if self.dialect.supports_array_typedef_without_element_type() {
Ok(DataType::Array(ArrayElemTypeDef::None))
} else {
self.expect_token(&Token::Lt)?;
let (inside_type, _trailing_bracket) = self.parse_data_type_helper()?;
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21 changes: 21 additions & 0 deletions tests/sqlparser_snowflake.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1289,6 +1289,27 @@ fn parse_array() {
},
expr_from_projection(only(&select.projection))
);

let sql = "SELECT CAST(a AS ARRAY(VARCHAR)) FROM customer";
let select = snowflake()
.verified_only_select_with_canonical(sql, "SELECT CAST(a AS Array(VARCHAR)) FROM customer");
assert_eq!(
&Expr::Cast {
kind: CastKind::Cast,
expr: Box::new(Expr::Identifier(Ident::new("a"))),
data_type: DataType::Array(ArrayElemTypeDef::Parenthesis(Box::new(DataType::Varchar(
None
),))),
array: false,
format: None,
},
expr_from_projection(only(&select.projection))
);

snowflake().one_statement_parses_to(
"CREATE TABLE t (a ARRAY(NUMBER))",
"CREATE TABLE t (a Array(NUMBER))",
);
}

#[test]
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