feat: add ai.generate_double to bigframes.bigquery package (#2111)

* feat: add ai.generate_double to bigframes.bigquery package

* fix lint

* fix doctest

Author: sycai

bigframes/bigquery/_operations/ai.py

@@ -188,6 +188,81 @@ def generate_int(
     return series_list[0]._apply_nary_op(operator, series_list[1:])
 
 
+@log_adapter.method_logger(custom_base_name="bigquery_ai")
+def generate_double(
+    prompt: PROMPT_TYPE,
+    *,
+    connection_id: str | None = None,
+    endpoint: str | None = None,
+    request_type: Literal["dedicated", "shared", "unspecified"] = "unspecified",
+    model_params: Mapping[Any, Any] | None = None,
+) -> series.Series:
+    """
+    Returns the AI analysis based on the prompt, which can be any combination of text and unstructured data.
+
+    **Examples:**
+
+        >>> import bigframes.pandas as bpd
+        >>> import bigframes.bigquery as bbq
+        >>> bpd.options.display.progress_bar = None
+        >>> animal = bpd.Series(["Kangaroo", "Rabbit", "Spider"])
+        >>> bbq.ai.generate_double(("How many legs does a ", animal, " have?"))
+        0    {'result': 2.0, 'full_response': '{"candidates...
+        1    {'result': 4.0, 'full_response': '{"candidates...
+        2    {'result': 8.0, 'full_response': '{"candidates...
+        dtype: struct<result: double, full_response: extension<dbjson<JSONArrowType>>, status: string>[pyarrow]
+
+        >>> bbq.ai.generate_double(("How many legs does a ", animal, " have?")).struct.field("result")
+        0    2.0
+        1    4.0
+        2    8.0
+        Name: result, dtype: Float64
+
+    Args:
+        prompt (Series | List[str|Series] | Tuple[str|Series, ...]):
+            A mixture of Series and string literals that specifies the prompt to send to the model. The Series can be BigFrames Series
+            or pandas Series.
+        connection_id (str, optional):
+            Specifies the connection to use to communicate with the model. For example, `myproject.us.myconnection`.
+            If not provided, the connection from the current session will be used.
+        endpoint (str, optional):
+            Specifies the Vertex AI endpoint to use for the model. For example `"gemini-2.5-flash"`. You can specify any
+            generally available or preview Gemini model. If you specify the model name, BigQuery ML automatically identifies and
+            uses the full endpoint of the model. If you don't specify an ENDPOINT value, BigQuery ML selects a recent stable
+            version of Gemini to use.
+        request_type (Literal["dedicated", "shared", "unspecified"]):
+            Specifies the type of inference request to send to the Gemini model. The request type determines what quota the request uses.
+            * "dedicated": function only uses Provisioned Throughput quota. The function returns the error Provisioned throughput is not
+            purchased or is not active if Provisioned Throughput quota isn't available.
+            * "shared": the function only uses dynamic shared quota (DSQ), even if you have purchased Provisioned Throughput quota.
+            * "unspecified": If you haven't purchased Provisioned Throughput quota, the function uses DSQ quota.
+            If you have purchased Provisioned Throughput quota, the function uses the Provisioned Throughput quota first.
+            If requests exceed the Provisioned Throughput quota, the overflow traffic uses DSQ quota.
+        model_params (Mapping[Any, Any]):
+            Provides additional parameters to the model. The MODEL_PARAMS value must conform to the generateContent request body format.
+
+    Returns:
+        bigframes.series.Series: A new struct Series with the result data. The struct contains these fields:
+        * "result": an DOUBLE value containing the model's response to the prompt. The result is None if the request fails or is filtered by responsible AI.
+        * "full_response": a JSON value containing the response from the projects.locations.endpoints.generateContent call to the model.
+        The generated text is in the text element.
+        * "status": a STRING value that contains the API response status for the corresponding row. This value is empty if the operation was successful.
+    """
+
+    prompt_context, series_list = _separate_context_and_series(prompt)
+    assert len(series_list) > 0
+
+    operator = ai_ops.AIGenerateDouble(
+        prompt_context=tuple(prompt_context),
+        connection_id=_resolve_connection_id(series_list[0], connection_id),
+        endpoint=endpoint,
+        request_type=request_type,
+        model_params=json.dumps(model_params) if model_params else None,
+    )
+
+    return series_list[0]._apply_nary_op(operator, series_list[1:])
+
+
 def _separate_context_and_series(
     prompt: PROMPT_TYPE,
 ) -> Tuple[List[str | None], List[series.Series]]:

bigframes/core/compile/ibis_compiler/scalar_op_registry.py

@@ -1986,7 +1986,7 @@ def ai_generate_bool(
 
 @scalar_op_compiler.register_nary_op(ops.AIGenerateInt, pass_op=True)
 def ai_generate_int(
-    *values: ibis_types.Value, op: ops.AIGenerateBool
+    *values: ibis_types.Value, op: ops.AIGenerateInt
 ) -> ibis_types.StructValue:
 
     return ai_ops.AIGenerateInt(
@@ -1998,6 +1998,20 @@ def ai_generate_int(
     ).to_expr()
 
 
+@scalar_op_compiler.register_nary_op(ops.AIGenerateDouble, pass_op=True)
+def ai_generate_double(
+    *values: ibis_types.Value, op: ops.AIGenerateDouble
+) -> ibis_types.StructValue:
+
+    return ai_ops.AIGenerateDouble(
+        _construct_prompt(values, op.prompt_context),  # type: ignore
+        op.connection_id,  # type: ignore
+        op.endpoint,  # type: ignore
+        op.request_type.upper(),  # type: ignore
+        op.model_params,  # type: ignore
+    ).to_expr()
+
+
 def _construct_prompt(
     col_refs: tuple[ibis_types.Value], prompt_context: tuple[str | None]
 ) -> ibis_types.StructValue:

bigframes/core/compile/sqlglot/expressions/ai_ops.py

@@ -40,6 +40,13 @@ def _(*exprs: TypedExpr, op: ops.AIGenerateInt) -> sge.Expression:
     return sge.func("AI.GENERATE_INT", *args)
 
 
+@register_nary_op(ops.AIGenerateDouble, pass_op=True)
+def _(*exprs: TypedExpr, op: ops.AIGenerateDouble) -> sge.Expression:
+    args = [_construct_prompt(exprs, op.prompt_context)] + _construct_named_args(op)
+
+    return sge.func("AI.GENERATE_DOUBLE", *args)
+
+
 def _construct_prompt(
     exprs: tuple[TypedExpr, ...], prompt_context: tuple[str | None, ...]
 ) -> sge.Kwarg:

bigframes/operations/__init__.py

@@ -14,7 +14,7 @@
 
 from __future__ import annotations
 
-from bigframes.operations.ai_ops import AIGenerateBool, AIGenerateInt
+from bigframes.operations.ai_ops import AIGenerateBool, AIGenerateDouble, AIGenerateInt
 from bigframes.operations.array_ops import (
     ArrayIndexOp,
     ArrayReduceOp,
@@ -413,6 +413,7 @@
     "GeoStDistanceOp",
     # AI ops
     "AIGenerateBool",
+    "AIGenerateDouble",
     "AIGenerateInt",
     # Numpy ops mapping
     "NUMPY_TO_BINOP",

bigframes/operations/ai_ops.py

@@ -66,3 +66,25 @@ def output_type(self, *input_types: dtypes.ExpressionType) -> dtypes.ExpressionT
                 )
             )
         )
+
+
+@dataclasses.dataclass(frozen=True)
+class AIGenerateDouble(base_ops.NaryOp):
+    name: ClassVar[str] = "ai_generate_double"
+
+    prompt_context: Tuple[str | None, ...]
+    connection_id: str
+    endpoint: str | None
+    request_type: Literal["dedicated", "shared", "unspecified"]
+    model_params: str | None
+
+    def output_type(self, *input_types: dtypes.ExpressionType) -> dtypes.ExpressionType:
+        return pd.ArrowDtype(
+            pa.struct(
+                (
+                    pa.field("result", pa.float64()),
+                    pa.field("full_response", dtypes.JSON_ARROW_TYPE),
+                    pa.field("status", pa.string()),
+                )
+            )
+        )

tests/system/small/bigquery/test_ai.py

@@ -146,5 +146,44 @@ def test_ai_generate_int_multi_model(session):
     )
 
 
+def test_ai_generate_double(session):
+    s = bpd.Series(["Cat"], session=session)
+    prompt = ("How many legs does a ", s, " have?")
+
+    result = bbq.ai.generate_double(prompt, endpoint="gemini-2.5-flash")
+
+    assert _contains_no_nulls(result)
+    assert result.dtype == pd.ArrowDtype(
+        pa.struct(
+            (
+                pa.field("result", pa.float64()),
+                pa.field("full_response", dtypes.JSON_ARROW_TYPE),
+                pa.field("status", pa.string()),
+            )
+        )
+    )
+
+
+def test_ai_generate_double_multi_model(session):
+    df = session.from_glob_path(
+        "gs://bigframes-dev-testing/a_multimodel/images/*", name="image"
+    )
+
+    result = bbq.ai.generate_double(
+        ("How many animals are there in the picture ", df["image"])
+    )
+
+    assert _contains_no_nulls(result)
+    assert result.dtype == pd.ArrowDtype(
+        pa.struct(
+            (
+                pa.field("result", pa.float64()),
+                pa.field("full_response", dtypes.JSON_ARROW_TYPE),
+                pa.field("status", pa.string()),
+            )
+        )
+    )
+
+
 def _contains_no_nulls(s: series.Series) -> bool:
     return len(s) == s.count()

tests/unit/core/compile/sqlglot/expressions/snapshots/test_ai_ops/test_ai_generate_double/out.sql

@@ -0,0 +1,18 @@
+WITH `bfcte_0` AS (
+  SELECT
+    `string_col` AS `bfcol_0`
+  FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
+), `bfcte_1` AS (
+  SELECT
+    *,
+    AI.GENERATE_DOUBLE(
+      prompt => (`bfcol_0`, ' is the same as ', `bfcol_0`),
+      connection_id => 'test_connection_id',
+      endpoint => 'gemini-2.5-flash',
+      request_type => 'SHARED'
+    ) AS `bfcol_1`
+  FROM `bfcte_0`
+)
+SELECT
+  `bfcol_1` AS `result`
+FROM `bfcte_1`

tests/unit/core/compile/sqlglot/expressions/snapshots/test_ai_ops/test_ai_generate_double_with_model_param/out.sql

@@ -0,0 +1,18 @@
+WITH `bfcte_0` AS (
+  SELECT
+    `string_col` AS `bfcol_0`
+  FROM `bigframes-dev`.`sqlglot_test`.`scalar_types`
+), `bfcte_1` AS (
+  SELECT
+    *,
+    AI.GENERATE_DOUBLE(
+      prompt => (`bfcol_0`, ' is the same as ', `bfcol_0`),
+      connection_id => 'test_connection_id',
+      request_type => 'SHARED',
+      model_params => JSON '{}'
+    ) AS `bfcol_1`
+  FROM `bfcte_0`
+)
+SELECT
+  `bfcol_1` AS `result`
+FROM `bfcte_1`

tests/unit/core/compile/sqlglot/expressions/test_ai_ops.py

@@ -111,3 +111,48 @@ def test_ai_generate_int_with_model_param(
     )
 
     snapshot.assert_match(sql, "out.sql")
+
+
+def test_ai_generate_double(scalar_types_df: dataframe.DataFrame, snapshot):
+    col_name = "string_col"
+
+    op = ops.AIGenerateDouble(
+        # The prompt does not make semantic sense but we only care about syntax correctness.
+        prompt_context=(None, " is the same as ", None),
+        connection_id="test_connection_id",
+        endpoint="gemini-2.5-flash",
+        request_type="shared",
+        model_params=None,
+    )
+
+    sql = utils._apply_unary_ops(
+        scalar_types_df, [op.as_expr(col_name, col_name)], ["result"]
+    )
+
+    snapshot.assert_match(sql, "out.sql")
+
+
+def test_ai_generate_double_with_model_param(
+    scalar_types_df: dataframe.DataFrame, snapshot
+):
+    if version.Version(sqlglot.__version__) < version.Version("25.18.0"):
+        pytest.skip(
+            "Skip test because SQLGLot cannot compile model params to JSON at this version."
+        )
+
+    col_name = "string_col"
+
+    op = ops.AIGenerateDouble(
+        # The prompt does not make semantic sense but we only care about syntax correctness.
+        prompt_context=(None, " is the same as ", None),
+        connection_id="test_connection_id",
+        endpoint=None,
+        request_type="shared",
+        model_params=json.dumps(dict()),
+    )
+
+    sql = utils._apply_unary_ops(
+        scalar_types_df, [op.as_expr(col_name, col_name)], ["result"]
+    )
+
+    snapshot.assert_match(sql, "out.sql")

third_party/bigframes_vendored/ibis/backends/sql/compilers/bigquery/__init__.py

@@ -1110,6 +1110,9 @@ def visit_AIGenerateBool(self, op, **kwargs):
     def visit_AIGenerateInt(self, op, **kwargs):
         return sge.func("AI.GENERATE_INT", *self._compile_ai_args(**kwargs))
 
+    def visit_AIGenerateDouble(self, op, **kwargs):
+        return sge.func("AI.GENERATE_DOUBLE", *self._compile_ai_args(**kwargs))
+
     def _compile_ai_args(self, **kwargs):
         args = []