diff --git a/src/driver/postgres/PostgresQueryRunner.ts b/src/driver/postgres/PostgresQueryRunner.ts
index 551084635..3fa2d3ddb 100644
--- a/src/driver/postgres/PostgresQueryRunner.ts
+++ b/src/driver/postgres/PostgresQueryRunner.ts
@@ -3717,7 +3717,7 @@ export class PostgresQueryRunner
                                 } else {
                                     tableColumn.default = dbColumn[
                                         "column_default"
-                                    ].replace(/::.+/g, "")
+                                    ].replace(/::[\w\s.\[\]\-"]+/g, "")
                                     tableColumn.default =
                                         tableColumn.default.replace(
                                             /^(-?\d+)$/,
diff --git a/test/github-issues/9829/entity/ExampleEntity.ts b/test/github-issues/9829/entity/ExampleEntity.ts
new file mode 100644
index 000000000..6151e2e4b
--- /dev/null
+++ b/test/github-issues/9829/entity/ExampleEntity.ts
@@ -0,0 +1,17 @@
+import { Entity } from "../../../../src/decorator/entity/Entity"
+import { Column } from "../../../../src/decorator/columns/Column"
+import { PrimaryGeneratedColumn } from "../../../../src/decorator/columns/PrimaryGeneratedColumn"
+
+@Entity()
+export class ExampleEntity {
+    @PrimaryGeneratedColumn()
+    id: number
+
+    @Column({
+        type: "varchar",
+        length: 3,
+        unique: true,
+        default: () => "('AA'|| COALESCE(NULL, '1'))",
+    })
+    someValue: string
+}
diff --git a/test/github-issues/9829/issue-9829.ts b/test/github-issues/9829/issue-9829.ts
new file mode 100644
index 000000000..5415e7ff8
--- /dev/null
+++ b/test/github-issues/9829/issue-9829.ts
@@ -0,0 +1,33 @@
+import "reflect-metadata"
+import { DataSource } from "../../../src/index"
+import {
+    closeTestingConnections,
+    createTestingConnections,
+} from "../../utils/test-utils"
+import { ExampleEntity } from "./entity/ExampleEntity"
+
+describe("github issues > #9829 Incorrect default value with concat value of function", () => {
+    let connections: DataSource[]
+    before(
+        async () =>
+            (connections = await createTestingConnections({
+                entities: [ExampleEntity],
+                schemaCreate: true,
+                dropSchema: true,
+                enabledDrivers: ["postgres"],
+            })),
+    )
+    after(() => closeTestingConnections(connections))
+    it("should get default concat value", () =>
+        Promise.all(
+            connections.map(async (connection) => {
+                const queryRunner = connection.createQueryRunner()
+                let table = await queryRunner.getTable("example_entity")
+
+                const nameColumn = table!.findColumnByName("someValue")!
+                nameColumn!.default!.should.be.equal(
+                    "('AA'|| COALESCE(NULL, '1'))",
+                )
+            }),
+        ))
+})