BigQuery support inline comment with hash syntax (apache#1192)

Author: iffyio

src/tokenizer.rs

@@ -984,7 +984,7 @@ impl<'a> Tokenizer<'a> {
                 }
                 '{' => self.consume_and_return(chars, Token::LBrace),
                 '}' => self.consume_and_return(chars, Token::RBrace),
-                '#' if dialect_of!(self is SnowflakeDialect) => {
+                '#' if dialect_of!(self is SnowflakeDialect | BigQueryDialect) => {
                     chars.next(); // consume the '#', starting a snowflake single-line comment
                     let comment = self.tokenize_single_line_comment(chars);
                     Ok(Some(Token::Whitespace(Whitespace::SingleLineComment {

tests/sqlparser_common.rs

@@ -8607,6 +8607,24 @@ fn test_release_savepoint() {
     one_statement_parses_to("RELEASE test1", "RELEASE SAVEPOINT test1");
 }
 
+#[test]
+fn test_comment_hash_syntax() {
+    let dialects = TestedDialects {
+        dialects: vec![Box::new(BigQueryDialect {}), Box::new(SnowflakeDialect {})],
+        options: None,
+    };
+    let sql = r#"
+    # comment
+    SELECT a, b, c # , d, e
+    FROM T
+    ####### comment #################
+    WHERE true
+    # comment
+    "#;
+    let canonical = "SELECT a, b, c FROM T WHERE true";
+    dialects.verified_only_select_with_canonical(sql, canonical);
+}
+
 #[test]
 fn test_buffer_reuse() {
     let d = GenericDialect {};