流弊milvus中的schema与通常数据库中的schema有很大区别，不是同一个概念。
milvus的schema是用来定义table(collection)的列(字段)，平时我们定义列(字段)是在table上，而milvus把table(collection)上的列放在了schema上，在创建table(collection)时再联系上一个schema，其他属性还是放在table(collection)上
schema 有一个主键、最多四个向量字段和几个标量字段
向量指的是本通过 "嵌入 "将字面字符串转换为向量，需要Column.dimension(int)指定维度
标量指的就是普通的字段 如名称、数量等支持类型: VarChar、Boolean、Int、Float、Double、Array 和JSON

在anyline中MilvusCollection继承了Table，在执行ddl时通过MilvusCollection或Table都可以，但前者提供了更多的特征方法

sdk与milvus版本兼容

Milvus 版本	SDK版本
2.0.2	2.0.4
2.1	2.1.0-beta4
2.2.0 ~ 2.2.8	2.2.5
2.2.9 ~ 2.2.14	2.2.13
2.3.x	2.3.9
2.4.x	2.4.9
2.5.x	2.5.2

自 v2.5.2 版本起，Milvus Java SDK 已拆分为两个独立的包：milvus-sdk-java 和 milvus-sdk-java-bulkwriter。如果您不需要使用 BulkWriter 功能，可以忽略 milvus-sdk-java-bulkwriter 包。如果需要使用 BulkWriter，请按照以下方式导入 milvus-sdk-java-bulkwriter 包：
 <dependency>
     <groupId>io.milvus</groupId>
     <artifactId>milvus-sdk-java-bulkwriter</artifactId>
     <version>版本号</version>
 </dependency>

数据源配置参数 https://milvus.io/api-reference/java/v2.4.x/v2/Client/MilvusClientV2.md

• token(String token)

  A valid access token to access the specified Milvus instance.

  This can be used as a recommended alternative to setting user and password separately.

  When setting this field, notice that:

  A valid token should be a pair of username and password used to access the target cluster, joined by a colon (:). For example, you can set this to root:Milvus, which is the default credential of the root user.

  Use this if authentication has been enabled on the target Milvus instance. To enable authentication, refer to Authenticate User Access.

• username(String userName)

  A valid username used to connect to the specified Milvus instance.

  Use this if authentication has been enabled on the target Milvus instance. To enable authentication, refer to Authenticate User Access.

  This should be used along with password.

• password(String password)

  A valid password used to connect to the specified Milvus instance.

  Use this if authentication has been enabled on the target Milvus instance. To enable authentication, refer to Authenticate User Access.

  This should be used along with user.

• dbName(String databaseName)

  The name of the database to which the target Milvus instance belongs.

• connectTimeoutMs(long connectTimeout)

  The timeout duration for this operation, in milliseconds.

  The value defaults to 10000.

• keepAliveTimeMs(long keepAliveTime)

  The time in milliseconds between keep-alive probes sent by the client to the server.

  The value defaults to 55000.

• keepAliveTimeoutMs(long keepAliveTimeout)

  The timeout duration in milliseconds for the server to respond to a keep-alive probe sent by the client.

  The value defaults to 20000.

• keepAliveWithoutCalls(boolean enable)

  Whether to send keep-alive probes without making requests.

  The value defaults to false.

• rpcDeadlineMs(long rpcDeadline)

  The deadline for RPC calls (disabled).

  The value defaults to 0, which indicates the deadline is disabled.

• clientKeyPath(String clientKeyPath)

  The path to the client key file for two-way authentication.

• clientPemPath(String clientPemPath)

  The path to the client PEM file for two-way authentication.

• caPemPath(String caPemPath)

  The path to the CA PEM file for two-way authentication.

• serverPemPath(String serverPemPath)

  The path to the server PEM file for two-way authentication.

• serverName(String serverName)

  The expected name of the server.

• secure(boolean enable)

  Whether to use TLS for the connection.

  The value defaults to true.

• idleTimeoutMs(long idleTimeout)

  The idle timeout for a connection.