fix: duckdb ISNAN (#2024)

tobymao · Aug 10, 2023 · 325b26e · 325b26e
1 parent ea7891d
commit 325b26e
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diff --git a/sqlglot/dialects/duckdb.py b/sqlglot/dialects/duckdb.py
@@ -247,6 +247,7 @@ class Generator(generator.Generator):
             exp.Encode: lambda self, e: encode_decode_sql(self, e, "ENCODE", replace=False),
             exp.Explode: rename_func("UNNEST"),
             exp.IntDiv: lambda self, e: self.binary(e, "//"),
+            exp.IsNan: rename_func("ISNAN"),
             exp.JSONExtract: arrow_json_extract_sql,
             exp.JSONExtractScalar: arrow_json_extract_scalar_sql,
             exp.JSONFormat: _json_format_sql,

diff --git a/tests/dialects/test_duckdb.py b/tests/dialects/test_duckdb.py
@@ -337,6 +337,8 @@ def test_duckdb(self):
                 unsupported_level=ErrorLevel.IMMEDIATE,
             )
 
+        self.validate_identity("SELECT ISNAN(x)")
+
     def test_time(self):
         self.validate_identity("SELECT CURRENT_DATE")
         self.validate_identity("SELECT CURRENT_TIMESTAMP")