Add support for view comments for Snowflake (#1287)

Co-authored-by: Joey Hain <joey@sigmacomputing.com>

tests/sqlparser_snowflake.rs

@@ -18,7 +18,7 @@ use sqlparser::ast::helpers::stmt_data_loading::{
     DataLoadingOption, DataLoadingOptionType, StageLoadSelectItem,
 };
 use sqlparser::ast::*;
-use sqlparser::dialect::{GenericDialect, SnowflakeDialect};
+use sqlparser::dialect::{Dialect, GenericDialect, SnowflakeDialect};
 use sqlparser::parser::{ParserError, ParserOptions};
 use sqlparser::tokenizer::*;
 use test_utils::*;
@@ -91,6 +91,56 @@ fn test_snowflake_single_line_tokenize() {
     assert_eq!(expected, tokens);
 }
 
+#[test]
+fn parse_sf_create_or_replace_view_with_comment_missing_equal() {
+    assert!(snowflake_and_generic()
+        .parse_sql_statements("CREATE OR REPLACE VIEW v COMMENT = 'hello, world' AS SELECT 1")
+        .is_ok());
+
+    assert!(snowflake_and_generic()
+        .parse_sql_statements("CREATE OR REPLACE VIEW v COMMENT 'hello, world' AS SELECT 1")
+        .is_err());
+}
+
+#[test]
+fn parse_sf_create_or_replace_with_comment_for_snowflake() {
+    let sql = "CREATE OR REPLACE VIEW v COMMENT = 'hello, world' AS SELECT 1";
+    let dialect = test_utils::TestedDialects {
+        dialects: vec![Box::new(SnowflakeDialect {}) as Box<dyn Dialect>],
+        options: None,
+    };
+
+    match dialect.verified_stmt(sql) {
+        Statement::CreateView {
+            name,
+            columns,
+            or_replace,
+            options,
+            query,
+            materialized,
+            cluster_by,
+            comment,
+            with_no_schema_binding: late_binding,
+            if_not_exists,
+            temporary,
+        } => {
+            assert_eq!("v", name.to_string());
+            assert_eq!(columns, vec![]);
+            assert_eq!(options, CreateTableOptions::None);
+            assert_eq!("SELECT 1", query.to_string());
+            assert!(!materialized);
+            assert!(or_replace);
+            assert_eq!(cluster_by, vec![]);
+            assert!(comment.is_some());
+            assert_eq!(comment.expect("expected comment"), "hello, world");
+            assert!(!late_binding);
+            assert!(!if_not_exists);
+            assert!(!temporary);
+        }
+        _ => unreachable!(),
+    }
+}
+
 #[test]
 fn test_sf_derived_table_in_parenthesis() {
     // Nesting a subquery in an extra set of parentheses is non-standard,