refactor(snowflake): remove some unnecessary checking of input in the…

… snowflake compiler

ibis/backends/sql/compilers/snowflake.py

@@ -109,6 +109,8 @@ class SnowflakeCompiler(SQLGlotCompiler):
     )
 
     SIMPLE_OPS = {
+        # overrides booland_agg/boolor_agg because neither of those can be used
+        # in a cumulative window frame, while min and max can
         ops.All: "min",
         ops.Any: "max",
         ops.ArrayDistinct: "array_distinct",
@@ -130,10 +132,17 @@ class SnowflakeCompiler(SQLGlotCompiler):
         ops.Hash: "hash",
         ops.Median: "median",
         ops.Mode: "mode",
+        ops.RandomUUID: "uuid_string",
         ops.StringToDate: "to_date",
         ops.StringToTimestamp: "to_timestamp_tz",
         ops.TimeFromHMS: "time_from_parts",
         ops.TimestampFromYMDHMS: "timestamp_from_parts",
+        ops.ToJSONMap: "as_object",
+        ops.ToJSONArray: "as_array",
+        ops.UnwrapJSONString: "as_varchar",
+        ops.UnwrapJSONInt64: "as_integer",
+        ops.UnwrapJSONFloat64: "as_double",
+        ops.UnwrapJSONBoolean: "as_boolean",
     }
 
     def __init__(self):
@@ -306,24 +315,6 @@ def visit_Cast(self, op, *, arg, to):
             return self.if_(self.f.is_array(arg), arg, NULL)
         return super().visit_Cast(op, arg=arg, to=to)
 
-    def visit_ToJSONMap(self, op, *, arg):
-        return self.if_(self.f.is_object(arg), arg, NULL)
-
-    def visit_ToJSONArray(self, op, *, arg):
-        return self.if_(self.f.is_array(arg), arg, NULL)
-
-    def visit_UnwrapJSONString(self, op, *, arg):
-        return self.if_(self.f.is_varchar(arg), self.f.as_varchar(arg), NULL)
-
-    def visit_UnwrapJSONInt64(self, op, *, arg):
-        return self.if_(self.f.is_integer(arg), self.f.as_integer(arg), NULL)
-
-    def visit_UnwrapJSONFloat64(self, op, *, arg):
-        return self.if_(self.f.is_double(arg), self.f.as_double(arg), NULL)
-
-    def visit_UnwrapJSONBoolean(self, op, *, arg):
-        return self.if_(self.f.is_boolean(arg), self.f.as_boolean(arg), NULL)
-
     def visit_IsNan(self, op, *, arg):
         return arg.eq(self.NAN)
 
@@ -383,14 +374,11 @@ def visit_MapLength(self, op, *, arg):
     def visit_Log(self, op, *, arg, base):
         return self.f.log(base, arg)
 
-    def visit_RandomScalar(self, op, **kwargs):
+    def visit_RandomScalar(self, op, **_):
         return self.f.uniform(
             self.f.to_double(0.0), self.f.to_double(1.0), self.f.random()
         )
 
-    def visit_RandomUUID(self, op, **kwargs):
-        return self.f.uuid_string()
-
     def visit_ApproxMedian(self, op, *, arg, where):
         return self.agg.approx_percentile(arg, 0.5, where=where)