feat: plugin text columns are longtext on mysql so they are not capped at 64KB

packages/plugin-sdk/CHANGELOG.md

@@ -7,6 +7,7 @@
 - `execCommand` timeout errors no longer include the command, which could hold a sudo password
 - `termix-plugin validate` fails when a plugin ships migrations for some database engines but not all three
 - `termix-plugin migrations` loads the table definitions from a path with a `#` or other URL characters in it
+- Text, json and encrypted columns are `longtext` on MySQL in new migrations, so they are no longer capped at 64KB. Existing migrations keep `text`
 - `i18next`, `react-dom`, `react-i18next` and `sonner` are optional peer dependencies, so npm stops installing them into backend-only plugins
 
 ## 1.0.4

packages/plugin-sdk/src/db.ts

@@ -69,7 +69,7 @@ function builder(column: PluginColumn): Builder {
 export const id = () =>
   builder({ type: "id", primaryKey: true, notNull: true });
 
-/** Unbounded string. Never indexable: MySQL cannot index TEXT. */
+/** Unbounded string, LONGTEXT on MySQL. Never indexable: MySQL cannot index TEXT. */
 export const text = () => builder({ type: "text" });
 
 /** Bounded string. Indexable on every engine. */

packages/plugin-sdk/src/ddl.ts

@@ -80,11 +80,13 @@ function columnType(
       // though it was declared unbounded. defineTable refuses to index a
       // text/json column, so in practice this only catches a primary key.
       if (keyed && dialect !== "sqlite") return `varchar(${KEY_LENGTH})`;
+      // MySQL TEXT stops at 64KB, so free text, json and secrets go long.
+      if (dialect === "mysql" && column.type !== "timestamp") return "longtext";
       return "text";
   }
 }
 
-/** Column types that are TEXT on MySQL when nothing keys them. */
+/** Column types that are TEXT or LONGTEXT on MySQL when nothing keys them. */
 const TEXT_ON_MYSQL: ReadonlySet<PluginColumn["type"]> = new Set([
   "text",
   "json",

src/backend/tests/plugins/table-ddl.test.ts

@@ -184,9 +184,9 @@ describe("createTableSql", () => {
         \`user_id\` varchar(255) NOT NULL,
         \`host_id\` int NOT NULL,
         \`title\` varchar(200) NOT NULL,
-        \`body\` text,
-        \`meta\` text,
-        \`secret\` text,
+        \`body\` longtext,
+        \`meta\` longtext,
+        \`secret\` longtext,
         \`pinned\` boolean DEFAULT false,
         \`position\` int DEFAULT 0,
         \`size\` bigint,
@@ -286,9 +286,9 @@ describe("adoptTableSql", () => {
     expect(mysql[1]).toBe("RENAME TABLE `fleets` TO `p_fleets_fleets`;");
   });
 
-  it("writes a TEXT default as an expression on MySQL", () => {
+  it("writes a long text default as an expression on MySQL", () => {
     expect(adoptTableSql("mysql", "fleets", adopted)[0]).toContain(
-      "`name` text NOT NULL DEFAULT ('x')",
+      "`name` longtext NOT NULL DEFAULT ('x')",
     );
     expect(createTableSql("sqlite", "fleets", adopted)[0]).toContain(
       "\"name\" text NOT NULL DEFAULT 'x'",