done

lib/python3.11/site-packages/narwhals/_spark_like/expr_str.py

@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+from functools import partial
+from typing import TYPE_CHECKING
+
+from narwhals._spark_like.utils import strptime_to_pyspark_format
+from narwhals._sql.expr_str import SQLExprStringNamespace
+from narwhals._utils import _is_naive_format, not_implemented
+
+if TYPE_CHECKING:
+    from narwhals._spark_like.expr import SparkLikeExpr
+
+
+class SparkLikeExprStringNamespace(SQLExprStringNamespace["SparkLikeExpr"]):
+    def to_datetime(self, format: str | None) -> SparkLikeExpr:
+        F = self.compliant._F
+        if not format:
+            function = F.to_timestamp
+        elif _is_naive_format(format):
+            function = partial(
+                F.to_timestamp_ntz, format=F.lit(strptime_to_pyspark_format(format))
+            )
+        else:
+            format = strptime_to_pyspark_format(format)
+            function = partial(F.to_timestamp, format=format)
+        return self.compliant._with_elementwise(
+            lambda expr: function(F.replace(expr, F.lit("T"), F.lit(" ")))
+        )
+
+    def to_date(self, format: str | None) -> SparkLikeExpr:
+        F = self.compliant._F
+        return self.compliant._with_elementwise(
+            lambda expr: F.to_date(expr, format=strptime_to_pyspark_format(format))
+        )
+
+    replace = not_implemented()