feat(impala): epoch_days

ibis/backends/sql/compilers/impala.py

@@ -29,7 +29,6 @@ class ImpalaCompiler(SQLGlotCompiler):
         ops.ArrayPosition,
         ops.Array,
         ops.Covariance,
-        ops.DateDelta,
         ops.ExtractDayOfYear,
         ops.Levenshtein,
         ops.Map,
@@ -314,5 +313,16 @@ def visit_Sign(self, op, *, arg):
             return self.cast(sign, dtype)
         return sign
 
+    def visit_DateDelta(self, op, *, left, right, part):
+        if not isinstance(part, sge.Literal):
+            raise com.UnsupportedOperationError(
+                "Only literal `part` values are supported for date delta"
+            )
+        if part.this != "day":
+            raise com.UnsupportedOperationError(
+                f"Only 'day' part is supported for date delta in the {self.dialect} backend"
+            )
+        return self.f.datediff(left, right)
+
 
 compiler = ImpalaCompiler()

ibis/backends/tests/test_temporal.py

@@ -1967,8 +1967,7 @@ def test_timestamp_precision_output(con, ts, scale, unit):
 
 
 @pytest.mark.notimpl(
-    ["dask", "datafusion", "druid", "impala", "pandas"],
-    raises=com.OperationNotDefinedError,
+    ["dask", "datafusion", "druid", "pandas"], raises=com.OperationNotDefinedError
 )
 @pytest.mark.parametrize(
     ("start", "end", "unit", "expected"),
@@ -1991,7 +1990,7 @@ def test_timestamp_precision_output(con, ts, scale, unit):
                     raises=com.OperationNotDefinedError,
                 ),
                 pytest.mark.notimpl(
-                    ["exasol", "polars", "sqlite", "oracle"],
+                    ["exasol", "polars", "sqlite", "oracle", "impala"],
                     raises=com.OperationNotDefinedError,
                 ),
             ],
@@ -2015,7 +2014,7 @@ def test_timestamp_precision_output(con, ts, scale, unit):
                     reason="timestampdiff rounds after subtraction and mysql doesn't have a date_trunc function",
                 ),
                 pytest.mark.notimpl(
-                    ["exasol", "polars", "sqlite", "oracle"],
+                    ["exasol", "polars", "sqlite", "oracle", "impala"],
                     raises=com.OperationNotDefinedError,
                 ),
             ],