Add functions to emulate Snowflake's bitmap_bit_position and bitmap_bucket_number

udfs/migration/snowflake/README.md

@@ -14,8 +14,12 @@ SELECT bqutil.sf.factorial(0)
 ## UDFs
 
 * [array_equal](#array_equal)
+* [bitmap_bit_position](#bitmap_bit_position)
+* [bitmap_bucket_number](#bitmap_bucket_number)
 * [factorial](#factorial)
 * [flatten](#flatten)
+* [json_ilike](#json_ilike)
+* [object_agg](#object_agg)
 
 
 ## Documentation
@@ -38,6 +42,33 @@ SELECT bqutil.sf.array_equal([JSON '1', JSON '2'], [JSON '1', JSON '2']) as eq1,
 eq1|eq2|eq3
 ---|---|---
 true|true|false
+
+### [bitmap_bit_position(value INT64)](bitmap_bit_position.sqlx)
+Emulates the `bitmap_bit_position` function present in Snowflake. [Snowflake docs](https://docs.snowflake.com/en/sql-reference/functions/bitmap_bit_position)
+
+```sql
+SELECT bqutil.sf.bitmap_bit_position(1) as pos1,
+       bqutil.sf.bitmap_bit_position(32768) as pos2,
+       bqutil.sf.bitmap_bit_position(32769) as pos3;
+```
+
+pos1|pos2|pos3
+---|---|---
+0|32767|0
+
+### [bitmap_bucket_number(value INT64)](bitmap_bucket_number.sqlx)
+Emulates the `bitmap_bucket_number` function present in Snowflake. [Snowflake docs](https://docs.snowflake.com/en/sql-reference/functions/bitmap_bucket_number)
+
+```sql
+SELECT bqutil.sf.bitmap_bucket_number(1) as bucket1,
+       bqutil.sf.bitmap_bucket_number(32768) as bucket2,
+       bqutil.sf.bitmap_bucket_number(32769) as bucket3;
+```
+
+bucket1|bucket2|bucket3
+---|---|---
+1|1|2
+
 ### [factorial(integer_expr INT64)](factorial.sqlx)
 Computes the factorial of its input. The input argument must be an integer expression in the range of `0` to `27`. Due to data type differences, the maximum input value in BigQuery is smaller than in Snowflake. [Snowflake docs](https://docs.snowflake.com/en/sql-reference/functions/factorial.html)
 ```sql

udfs/migration/snowflake/bitmap_bit_position.sqlx

@@ -0,0 +1,24 @@
+config { hasOutput: true }
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+CREATE OR REPLACE FUNCTION ${self()}(value INT64)
+RETURNS INT64
+OPTIONS (
+  description = "Emulates the 'bitmap_bit_position' function present in Snowflake."
+) AS (
+  if(value > 0, (value - 1) & 32767, 0)
+);

udfs/migration/snowflake/bitmap_bucket_number.sqlx

@@ -0,0 +1,24 @@
+config { hasOutput: true }
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+CREATE OR REPLACE FUNCTION ${self()}(value INT64)
+RETURNS INT64
+OPTIONS (
+  description = "Emulates the 'bitmap_bucket_number' function present in Snowflake."
+) AS (
+  if(value > 0, ((value - 1) >> 15) + 1, 0)
+);

udfs/migration/snowflake/test_cases.js

@@ -207,5 +207,64 @@ generate_udf_test("array_equal", [
     }
 ]);
 
+generate_udf_test("bitmap_bucket_number", [
+    {
+        inputs: [`CAST(1 AS INT64)`],
+        expected_output: `CAST(1 AS INT64)`
+    },
+    {
+        inputs: [`CAST(1000000 AS INT64)`],
+        expected_output: `CAST(31 AS INT64)`
+    },
+    {
+        inputs: [`CAST(32767 AS INT64)`],
+        expected_output: `CAST(1 AS INT64)`
+    },
+    {
+        inputs: [`CAST(32768 AS INT64)`],
+        expected_output: `CAST(1 AS INT64)`
+    },
+    {
+        inputs: [`CAST(32769 AS INT64)`],
+        expected_output: `CAST(2 AS INT64)`
+    },
+    {
+        inputs: [`CAST(400000 AS INT64)`],
+        expected_output: `CAST(13 AS INT64)`
+    },
+    {
+        inputs: [`CAST(0 AS INT64)`],
+        expected_output: `CAST(0 AS INT64)`
+    }
+]);
 
-
+generate_udf_test("bitmap_bit_position", [
+    {
+        inputs: [`CAST(1 AS INT64)`],
+        expected_output: `CAST(0 AS INT64)`
+    },
+    {
+        inputs: [`CAST(1000000 AS INT64)`],
+        expected_output: `CAST(16959 AS INT64)`
+    },
+    {
+        inputs: [`CAST(32767 AS INT64)`],
+        expected_output: `CAST(32766 AS INT64)`
+    },
+    {
+        inputs: [`CAST(32768 AS INT64)`],
+        expected_output: `CAST(32767 AS INT64)`
+    },
+    {
+        inputs: [`CAST(32769 AS INT64)`],
+        expected_output: `CAST(0 AS INT64)`
+    },
+    {
+        inputs: [`CAST(400000 AS INT64)`],
+        expected_output: `CAST(6783 AS INT64)`
+    },
+    {
+        inputs: [`CAST(0 AS INT64)`],
+        expected_output: `CAST(0 AS INT64)`
+    }
+]);