databricks
diff --git a/‎lib/sea/SeaInputValidation.ts‎
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diff --git a/‎lib/sea/SeaNativeLoader.ts‎
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diff --git a/‎lib/sea/SeaPositionalParams.ts‎
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diff --git a/‎lib/sea/SeaServerInfo.ts‎
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@@ -0,0 +1,46 @@
+// Copyright (c) 2026 Databricks, Inc.
+//
+// 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.
+
+import Int64 from 'node-int64';
+import { DBSQLParameter, DBSQLParameterValue } from '../DBSQLParameter';
+import ParameterError from '../errors/ParameterError';
+
+/**
+ * Reject a parameter value that cannot be bound as a scalar. Arrays and plain
+ * objects stringify to garbage (e.g. `[1,2,3]` → `"1,2,3"`) that the server
+ * fails to coerce — on the Thrift path the operation never returns to
+ * FINISHED (a DoS hazard), and on SEA it surfaces an opaque server error. We
+ * fail fast at bind time instead, mirroring the kernel's compound-type
+ * rejection. `DBSQLParameter`, `Int64`, `Date`, and JS primitives are allowed.
+ *
+ * Parameter-marker counting and arity validation are intentionally NOT done
+ * here: the kernel's `statement::params` codec owns that check and binds
+ * exactly one placeholder style per statement, so duplicating the SQL-walk
+ * JS-side would only risk drift. The driver's sole bind-time job is this
+ * cheap, type-shape gate before the value crosses the napi boundary.
+ */
+export default function assertBindableValue(value: DBSQLParameter | DBSQLParameterValue, label: string): void {
+  if (value instanceof DBSQLParameter) return;
+  if (value === null || value === undefined) return;
+  if (Array.isArray(value)) {
+    throw new ParameterError(
+      `${label} is an array; compound types (ARRAY/MAP/STRUCT) are not bindable as a parameter value`,
+    );
+  }
+  if (typeof value === 'object' && !(value instanceof Date) && !(value instanceof Int64)) {
+    throw new ParameterError(
+      `${label} is an object; only scalar values (string/number/bigint/boolean), Date, and Int64 are bindable`,
+    );
+  }
+}
@@ -33,6 +33,9 @@ import type {
   ConnectionOptions as NativeConnectionOptions,
   ArrowBatch as NativeArrowBatch,
   ArrowSchema as NativeArrowSchema,
+  ExecuteOptions as NativeExecuteOptions,
+  TypedValueInput as NativeTypedValueInput,
+  NamedTypedValueInput as NativeNamedTypedValueInput,
 } from '../../native/sea';
 
 // SEA-prefixed re-exports. The kernel-generated `.d.ts` keeps the
@@ -46,6 +49,16 @@ export type SeaArrowSchema = NativeArrowSchema;
 export type SeaConnection = NativeConnection;
 export type SeaStatement = NativeStatement;
 
+// Per-statement execution options and bound-parameter inputs are kernel
+// concerns: the napi binding generates the canonical shapes (`positionalParams`
+// / `namedParams` as `TypedValueInput` / `NamedTypedValueInput`, plus
+// `rowLimit`, `queryTimeoutSecs`, `statementConf`, `queryTags`). We re-export
+// rather than re-declare so the driver-side param codec can never drift from
+// the kernel contract.
+export type SeaNativeExecuteOptions = NativeExecuteOptions;
+export type SeaNativeTypedValueInput = NativeTypedValueInput;
+export type SeaNativeNamedTypedValueInput = NativeNamedTypedValueInput;
+
 /**
  * The full native binding surface, derived from the generated module
  * so it can never drift from the `.d.ts` contract: when the kernel
 
@@ -0,0 +1,124 @@
+// Copyright (c) 2026 Databricks, Inc.
+//
+// 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.
+
+import { DBSQLParameter, DBSQLParameterValue } from '../DBSQLParameter';
+import ParameterError from '../errors/ParameterError';
+import { SeaNativeTypedValueInput, SeaNativeNamedTypedValueInput } from './SeaNativeLoader';
+import assertBindableValue from './SeaInputValidation';
+
+/**
+ * Derive `(precision,scale)` from a decimal value string for the SEA
+ * `DECIMAL(p,s)` type name — the kernel param codec requires the parenthesised
+ * form (plain `"DECIMAL"` is rejected) so it preserves the caller's fractional
+ * digits. `"99.99"` ⇒ `"4,2"`; `"-123"` ⇒ `"3,0"`; `"0.00001"` ⇒ `"5,5"`.
+ *
+ * Precision is significant integer digits (insignificant leading zeros
+ * stripped, matching Spark's decimal-literal rule) plus the fractional scale.
+ * The value is NOT clamped: a non-numeric value, or one that needs precision >
+ * the Databricks maximum of 38, throws `ParameterError` at bind time rather
+ * than emitting an inconsistent `DECIMAL(38,…)` type alongside an
+ * unrepresentable value (which the kernel would reject or silently truncate).
+ */
+function decimalPrecisionScale(v: string): string {
+  // Accept an optional sign + plain decimal numeral only. Exponential form
+  // ("1e+21"), empty, and non-numeric ("abc") are rejected with a clear error
+  // instead of mis-deriving (p,s) and surfacing an opaque kernel failure.
+  const m = /^[+-]?(\d*)(?:\.(\d+))?$/.exec(v.trim());
+  const intPart = m?.[1] ?? '';
+  const fracPart = m?.[2] ?? '';
+  if (!m || (intPart === '' && fracPart === '')) {
+    throw new ParameterError(
+      `DECIMAL parameter value "${v}" is not a plain decimal numeral (expected [+-]?digits[.digits]).`,
+    );
+  }
+  const scale = fracPart.length;
+  // Significant integer digits: drop insignificant leading zeros ("007" → 1,
+  // "0" / "" → 0) so e.g. 0.00001 is DECIMAL(5,5), not DECIMAL(6,5).
+  const significantIntDigits = intPart.replace(/^0+/, '').length;
+  const precision = Math.max(significantIntDigits + scale, 1);
+  if (precision > 38) {
+    throw new ParameterError(
+      `DECIMAL parameter value "${v}" needs precision ${precision}, exceeding the Databricks maximum of 38. ` +
+        'Round/scale the value or bind it as a STRING.',
+    );
+  }
+  return `${precision},${scale}`;
+}
+
+/**
+ * Reduce a `DBSQLParameter | DBSQLParameterValue` to the napi
+ * `TypedValueInput` (`{ sqlType, value? }`) the kernel's positional-param
+ * codec (`parse_typed_value`) accepts. Reuses `DBSQLParameter.toSparkParameter`
+ * — the same type-inference + value-stringification the Thrift backend uses —
+ * then adapts the type name to the codec's expectations:
+ * - DECIMAL → `DECIMAL(p,s)` (parenthesised form required)
+ * - INTERVAL * → `INTERVAL` (the codec's single interval type name)
+ * - a missing value ⇒ SQL NULL (`parse_typed_value` maps `value: None` to NULL).
+ */
+function toTypedValueInput(value: DBSQLParameter | DBSQLParameterValue): SeaNativeTypedValueInput {
+  const param = value instanceof DBSQLParameter ? value : new DBSQLParameter({ value });
+  const spark = param.toSparkParameter();
+  const stringValue = spark.value?.stringValue ?? undefined;
+
+  // NULL: no value (and `VOID` ignores any type), matching toSparkParameter's
+  // type/value-less shape for null/undefined.
+  if (stringValue === undefined || stringValue === null) {
+    return { sqlType: 'VOID' };
+  }
+
+  let sqlType = spark.type ?? 'STRING';
+  const upper = sqlType.toUpperCase();
+  if (upper === 'DECIMAL') {
+    sqlType = `DECIMAL(${decimalPrecisionScale(stringValue)})`;
+  } else if (upper.startsWith('INTERVAL')) {
+    sqlType = 'INTERVAL';
+  }
+  return { sqlType, value: stringValue };
+}
+
+/**
+ * Convert the public `ordinalParameters` option into the napi
+ * `positionalParams` array (1-based `?` placeholders). Returns `undefined`
+ * when none were supplied, so the caller can keep the minimal no-options
+ * call shape.
+ */
+export function buildSeaPositionalParams(
+  ordinalParameters?: Array<DBSQLParameter | DBSQLParameterValue>,
+): Array<SeaNativeTypedValueInput> | undefined {
+  if (ordinalParameters === undefined || ordinalParameters.length === 0) {
+    return undefined;
+  }
+  return ordinalParameters.map((value, i) => {
+    assertBindableValue(value, `ordinalParameters[${i}]`);
+    return toTypedValueInput(value);
+  });
+}
+
+/**
+ * Convert the public `namedParameters` option (`Record<name, value>`) into
+ * the napi `namedParams` array (`:name` placeholders). Each value reuses the
+ * same `toTypedValueInput` mapping (DECIMAL → DECIMAL(p,s), NULL → VOID, …),
+ * then carries its name. Returns `undefined` when none were supplied.
+ */
+export function buildSeaNamedParams(
+  namedParameters?: Record<string, DBSQLParameter | DBSQLParameterValue>,
+): Array<SeaNativeNamedTypedValueInput> | undefined {
+  if (namedParameters === undefined || Object.keys(namedParameters).length === 0) {
+    return undefined;
+  }
+  return Object.keys(namedParameters).map((name) => {
+    assertBindableValue(namedParameters[name], `namedParameters[${name}]`);
+    return { name, ...toTypedValueInput(namedParameters[name]) };
+  });
+}
@@ -0,0 +1,74 @@
+// Copyright (c) 2026 Databricks, Inc.
+//
+// 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.
+
+import { TGetInfoType, TGetInfoValue } from '../../thrift/TCLIService_types';
+
+/**
+ * `getInfo` (JDBC `DatabaseMetaData` / ODBC `SQLGetInfo`) is a Thrift-protocol
+ * concept: the Thrift backend forwards `TGetInfoReq` to the server's `getInfo`
+ * RPC. The SEA REST protocol and the Rust kernel have **no** equivalent
+ * endpoint, so — exactly as JDBC does for `DatabaseMetaData` — we synthesize
+ * the values client-side.
+ *
+ * The Databricks Thrift server itself answers only three `TGetInfoType`s and
+ * rejects every other value; we mirror that surface so the SEA path is a
+ * drop-in equivalent:
+ *
+ *   | TGetInfoType        | Thrift server | SEA (here)        |
+ *   |---------------------|---------------|-------------------|
+ *   | CLI_SERVER_NAME (13)| "Spark SQL"   | "Spark SQL"        |
+ *   | CLI_DBMS_NAME   (17)| "Spark SQL"   | "Spark SQL"        |
+ *   | CLI_DBMS_VER    (18)| "3.1.1"       | "3.1.1"            |
+ *   | (any other)         | error         | undefined → error  |
+ *
+ * Empirically re-verified against a live warehouse over the Thrift path: the
+ * three values above are byte-identical to the server's, and the server
+ * returns an error for every other `TGetInfoType` (probed CLI_MAX_DRIVER_-
+ * CONNECTIONS, CLI_DATA_SOURCE_NAME, CLI_FETCH_DIRECTION, … — all errored). So
+ * the SEA "undefined → throw" path matches Thrift's effective behaviour rather
+ * than narrowing it.
+ */
+
+/** Canonical DBMS product name — identical to the Thrift server's value. */
+export const SEA_DBMS_NAME = 'Spark SQL';
+
+/** Server-name answer — identical to the Thrift server's value. */
+export const SEA_SERVER_NAME = 'Spark SQL';
+
+/**
+ * DBMS version string. Mirrors the constant the Databricks Thrift server
+ * reports for `CLI_DBMS_VER` (the HiveServer2-compat Spark SQL version, not
+ * the DBR release). Kept in lock-step with Thrift for parity; if the server
+ * ever changes it the comparator's GET_INFO suite flags the drift.
+ */
+export const SEA_DBMS_VERSION = '3.1.1';
+
+/**
+ * Synthesize the `TGetInfoValue` for a `getInfo` request on the SEA path.
+ * Returns `undefined` for any `TGetInfoType` the (Thrift) server does not
+ * answer — the caller surfaces that as an error, matching Thrift's
+ * reject-unsupported-info-type behaviour.
+ */
+export function seaServerInfoValue(infoType: number): TGetInfoValue | undefined {
+  switch (infoType) {
+    case TGetInfoType.CLI_SERVER_NAME:
+      return new TGetInfoValue({ stringValue: SEA_SERVER_NAME });
+    case TGetInfoType.CLI_DBMS_NAME:
+      return new TGetInfoValue({ stringValue: SEA_DBMS_NAME });
+    case TGetInfoType.CLI_DBMS_VER:
+      return new TGetInfoValue({ stringValue: SEA_DBMS_VERSION });
+    default:
+      return undefined;
+  }
+}