fix: escape BigQuery reserved keywords (#5166) (#5173)

Author: nsiregar

prqlc/prqlc/src/sql/keywords.rs

@@ -23,6 +23,7 @@ fn sql_keywords() -> &'static HashSet<&'static str> {
         m.extend(SQLITE_KEYWORDS);
         m.extend(POSTGRES_KEYWORDS);
         m.extend(DUCKDB_KEYWORDS);
+        m.extend(BIGQUERY_KEYWORDS);
 
         let reverse_index: HashMap<&Keyword, usize> = ALL_KEYWORDS_INDEX
             .iter()
@@ -390,6 +391,107 @@ const DUCKDB_KEYWORDS: &[&str] = &[
     "WITH",
 ];
 
+// source reserved keywords GoogleSQL
+// <https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical#reserved_keywords>
+const BIGQUERY_KEYWORDS: &[&str] = &[
+    "ALL",
+    "AND",
+    "ANY",
+    "ARRAY",
+    "AS",
+    "ASC",
+    "ASSERT_ROWS_MODIFIED",
+    "AT",
+    "BETWEEN",
+    "BY",
+    "CASE",
+    "CAST",
+    "COLLATE",
+    "CONTAINS",
+    "CREATE",
+    "CROSS",
+    "CUBE",
+    "CURRENT",
+    "DEFAULT",
+    "DEFINE",
+    "DESC",
+    "DISTINCT",
+    "ELSE",
+    "END",
+    "ENUM",
+    "ESCAPE",
+    "EXCEPT",
+    "EXCLUDE",
+    "EXISTS",
+    "EXTRACT",
+    "FALSE",
+    "FETCH",
+    "FOLLOWING",
+    "FOR",
+    "FROM",
+    "FULL",
+    "GROUP",
+    "GROUPING",
+    "GROUPS",
+    "HASH",
+    "HAVING",
+    "IF",
+    "IGNORE",
+    "IN",
+    "INNER",
+    "INTERSECT",
+    "INTERVAL",
+    "INTO",
+    "IS",
+    "JOIN",
+    "LATERAL",
+    "LEFT",
+    "LIKE",
+    "LIMIT",
+    "LOOKUP",
+    "MERGE",
+    "NATURAL",
+    "NEW",
+    "NO",
+    "NOT",
+    "NULL",
+    "NULLS",
+    "OF",
+    "ON",
+    "OR",
+    "ORDER",
+    "OUTER",
+    "OVER",
+    "PARTITION",
+    "PRECEDING",
+    "PROTO",
+    "QUALIFY",
+    "RANGE",
+    "RECURSIVE",
+    "RESPECT",
+    "RIGHT",
+    "ROLLUP",
+    "ROWS",
+    "SELECT",
+    "SET",
+    "SOME",
+    "STRUCT",
+    "TABLESAMPLE",
+    "THEN",
+    "TO",
+    "TREAT",
+    "TRUE",
+    "UNBOUNDED",
+    "UNION",
+    "UNNEST",
+    "USING",
+    "WHEN",
+    "WHERE",
+    "WINDOW",
+    "WITH",
+    "WITHIN",
+];
+
 #[test]
 fn test_sql_keywords() {
     assert!(is_keyword("from"));

prqlc/prqlc/tests/integration/sql.rs

@@ -1092,6 +1092,23 @@ fn test_quoting_05() {
     "#);
 }
 
+#[test]
+fn test_quoting_06() {
+    let prql = "
+prql target:sql.bigquery
+
+from `some_dataset.demo`
+select {`hash`}
+";
+
+    assert_snapshot!(compile(prql).unwrap(), @r#"
+    SELECT
+      `hash`
+    FROM
+      `some_dataset.demo`
+    "#);
+}
+
 #[test]
 fn test_sorts_01() {
     assert_snapshot!((compile(r###"