fix: use nvarchar/ntext during transit for SQLServer queries (#7933)

src/driver/sqlserver/SqlServerQueryRunner.ts

@@ -2272,15 +2272,12 @@ export class SqlServerQueryRunner extends BaseQueryRunner implements QueryRunner
             case "tinyint":
                 return this.driver.mssql.TinyInt;
             case "char":
-                return this.driver.mssql.Char(...parameter.params);
             case "nchar":
                 return this.driver.mssql.NChar(...parameter.params);
             case "text":
-                return this.driver.mssql.Text;
             case "ntext":
                 return this.driver.mssql.Ntext;
             case "varchar":
-                return this.driver.mssql.VarChar(...parameter.params);
             case "nvarchar":
                 return this.driver.mssql.NVarChar(...parameter.params);
             case "xml":

test/github-issues/7932/entity/Example.ts

@@ -0,0 +1,22 @@
+import {
+    Entity,
+    PrimaryGeneratedColumn,
+    Column,
+    CreateDateColumn
+} from '../../../../src';
+
+@Entity()
+export class Example {
+
+    @PrimaryGeneratedColumn('uuid')
+    id?: string;
+
+    @CreateDateColumn({ type: 'datetime' })
+    created?: Date;
+
+    @Column('varchar', { length: 10 })
+    content: string = '';
+
+    @Column('char', { length: 10 })
+    fixedLengthContent: string = '';
+}

test/github-issues/7932/issue-7932.ts

@@ -0,0 +1,56 @@
+import "reflect-metadata";
+import { expect } from "chai";
+import { Connection } from "../../../src";
+import { closeTestingConnections, createTestingConnections, reloadTestingDatabases } from "../../utils/test-utils";
+import { Example } from "./entity/Example";
+
+describe("github issues > #7932  non-ascii characters assigned to var/char columns in SQL are truncated to one byte", () => {
+
+    let connections: Connection[];
+    before(async () => {
+        connections = await createTestingConnections({
+            enabledDrivers: ["mssql"],
+            entities: [Example],
+            schemaCreate: false,
+            dropSchema: true
+        });
+    });
+    beforeEach(() => reloadTestingDatabases(connections));
+    after(() => closeTestingConnections(connections));
+
+    it("should store non-ascii characters in var/char without data loss", () => Promise.all(connections.map(async connection => {
+        const repo = connection.getRepository(Example);
+
+        const entity = new Example();
+        entity.content = '\u2021';
+        entity.fixedLengthContent = '\u2022';
+
+        await repo.save(entity);
+        const savedEntity =
+            await repo.findOne({ order: { created: 'DESC' } });
+
+        expect(savedEntity?.content).to.be.equal(entity.content);
+        expect(savedEntity?.fixedLengthContent).to.be.equal('\u2022         ');
+    })));
+
+    it("should throw an error if characters in a string are too long to store", () => Promise.all(connections.map(async connection => {
+        const repo = connection.getRepository(Example);
+
+        const entity = new Example();
+        entity.content = '💖';
+        entity.fixedLengthContent = '🏍';
+
+        expect(repo.save(entity)).to.eventually.be.rejectedWith(Error);
+    })));
+
+    it("should not change char or varchar column types to nchar or nvarchar", () => Promise.all(connections.map(async connection => {
+        const repo = connection.getRepository(Example);
+
+        const columnMetadata = repo.metadata.ownColumns;
+        const contentColumnType = columnMetadata.find(m => m.propertyName === 'content')?.type;
+        const fixedLengthContentColumnType = columnMetadata.find(m => m.propertyName === 'fixedLengthContent')?.type;
+
+        expect(contentColumnType).to.be.equal('varchar');
+        expect(fixedLengthContentColumnType).to.be.equal('char');
+    })));
+});