refactor(db): decimalNumber helperを削除

README.md

@@ -137,14 +137,13 @@ Requires the `drizzle-orm` and `mysql2` peers. Reads run against a replica via r
 | `insertIdOf` / `affectedRowsOf` / `insertedIdsOf` / `DzWriteResult` | Extract `insertId` / `affectedRows` (and derive contiguous bulk-insert ids) from a mysql2 write result. |
 | `toJstDate` / `jstTimestampParams` / `jstDatetimeParams` / `jstDateParams` | JST date/time normalization params (advanced use). |
 | `MYSQL_TIMEZONE` | Default mysql2 connection `timezone` (`'+09:00'`) for the JST DB deployment. |
-| `jstTimestamp` / `jstDatetime` / `jstDate` / `decimalNumber` | Drizzle column helpers (no repo-side wrapper needed). |
+| `jstTimestamp` / `jstDatetime` / `jstDate` | Drizzle column helpers (no repo-side wrapper needed). |
 | `jstOnUpdateNow` | SQL expression for `ON UPDATE CURRENT_TIMESTAMP`. The `jstTimestamp` customType (and friends) do not support `.onUpdateNow()`, so pair it with `.$onUpdateFn(() => jstOnUpdateNow(fsp))`. |
-| `coerceDecimalNumber` / `decimalNumberParams` | DECIMAL normalization params (the `decimalNumber` column helper is usually enough). |
 | `DRIZZLE_ORM_OPTIONS` / `honoDrizzleConfig(options)` / `HonoDrizzleConfigOptions` | Shared Drizzle casing (`snake_case`) for both the runtime `drizzle()` call and `drizzle.config.ts`, keeping config ↔ runtime in sync. |
 | `resolveDbSecret()` / `ResolvedDbSecret` | Resolve DB connection info from the `DB_SECRET` env var (an AWS RDS managed-secret JSON string) for CI migrate / local tooling. Returns `undefined` when `DB_SECRET` is unset; throws on invalid JSON or a missing required key. |
 | `baselineMigrations(options)` / `readBaselineEntry(migrationsFolder)` / `BaselineMigrationsOptions` / `BaselineResult` / `BaselineEntry` | Brownfield first-deploy helper: mark an existing `0000_*` migration as applied without re-running DDL. |
 
-#### Drizzle column helpers (`jstTimestamp` / `decimalNumber`, etc.)
+#### Drizzle column helpers (`jstTimestamp` / `jstDatetime` / `jstDate`, etc.)
 
 - `drizzle-orm` is a **peer** only. The kit does not include `drizzle-orm` as a dependency (even after publishing, it uses the consumer's single copy).
 - The consumer just keeps `drizzle-orm` in its `dependencies` as usual. **No `overrides` in `package.json` are needed.**

src/db/columns.ts

@@ -5,8 +5,7 @@
  * @remarks
  * `drizzle-orm` is a **peer** (the consumer resolves a single copy); the kit does not bundle it. The
  * return types are the `customType` inference as-is (`MySqlCustomColumnBuilder<…>`) with no `any`, so
- * the column's semantic type (`string | Date`, `number | null`, etc.) propagates to the consumer
- * table's `$inferSelect`.
+ * the column's semantic type (`string | Date`, etc.) propagates to the consumer table's `$inferSelect`.
  *
  * **Precondition (a single drizzle copy)**: Drizzle's `SQL` is a **nominal** type carrying a private
  * field `shouldInlineParams`, so if the kit and the consumer resolve different copies of drizzle,
@@ -23,8 +22,6 @@
  */
 import { sql } from 'drizzle-orm';
 import { customType } from 'drizzle-orm/mysql-core';
-import { decimalNumberParams } from './decimal.js';
-import type { DecimalNumberConfig } from './decimal.js';
 import { jstDateParams, jstDatetimeParams, jstTimestampParams } from './jst.js';
 
 /**
@@ -47,7 +44,3 @@ export const jstDatetime = (name: string, opts?: { fsp?: number }) =>
 /** MySQL `date` — on INSERT/UPDATE, normalizes ISO / empty strings to `YYYY-MM-DD` (via `toDriver`). */
 export const jstDate = (name: string) =>
   customType<{ data: string | null; driverData: string | null }>(jstDateParams())(name);
-
-/** MySQL `decimal` — SELECT coerces string→number via `fromDriver`; writes bind the number as-is. */
-export const decimalNumber = (name: string, config: DecimalNumberConfig) =>
-  customType<{ data: number | null; driverData: number | string | null }>(decimalNumberParams(config))(name);

src/db/index.ts

@@ -32,10 +32,7 @@ export type { HyperdriveLike, ExecutionContextLike } from './connection.js';
 
 export { MYSQL_TIMEZONE, toJstDate, jstTimestampParams, jstDatetimeParams, jstDateParams } from './jst.js';
 
-export { coerceDecimalNumber, decimalNumberParams } from './decimal.js';
-export type { DecimalNumberConfig } from './decimal.js';
-
-export { jstTimestamp, jstDatetime, jstDate, decimalNumber, jstOnUpdateNow } from './columns.js';
+export { jstTimestamp, jstDatetime, jstDate, jstOnUpdateNow } from './columns.js';
 
 export { DRIZZLE_ORM_OPTIONS, honoDrizzleConfig, resolveDbSecret } from './orm-config.js';
 export type { HonoDrizzleConfigOptions, ResolvedDbSecret } from './orm-config.js';