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[feat](bi) support default_init_catalog user property for external catalog #2359

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May 13, 2025
Merged

[feat](bi) support default_init_catalog user property for external catalog #2359

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1e8d07e
update docs for user property: default_init_catalog
cambyzju May 7, 2025
0334cfa
update
cambyzju May 12, 2025
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11 changes: 11 additions & 0 deletions docs/lakehouse/catalog-overview.md
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Expand Up @@ -154,6 +154,17 @@ jdbc:mysql://host:9030/iceberg_catalog.iceberg_db

The fixed name for the built-in catalog is `internal`. The switching method is the same as for external catalogs.

### Default Catalog
The user attribute `default_init_catalog` is used to set the default catalog for a specific user. Once set, when the specified user connects to Doris, they will automatically switch to the set catalog.

```sql
SET PROPERTY default_init_catalog=hive_catalog;
```

Note 1: If the catalog has been explicitly specified in the MySQL command line or JDBC connection strings, then the specified catalog will be used, and the `default_init_catalog` user attribute will not take effect.
Note 2: If the catalog set by the user attribute `default_init_catalog` no longer exists, it will automatically switch to the default `internal` catalog.
Note 3: This feature takes effect starting from version v3.1.x.

### Simple Query

You can query tables in external catalogs using any SQL statement supported by Doris.
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12 changes: 12 additions & 0 deletions i18n/zh-CN/docusaurus-plugin-content-docs/current/lakehouse/catalog-overview.md
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Expand Up @@ -153,6 +153,18 @@ jdbc:mysql://host:9030/iceberg_catalog.iceberg_db

内置数据目录的固定名称为 `internal`。切换方式和外部数据目录一致。

### 默认数据目录

通过用户属性 `default_init_catalog`，为指定用户设置默认的数据目录。设置完成后，当指定用户连接 Doris 时，会自动切换到设置的数据目录。

```sql
SET PROPERTY default_init_catalog=hive_catalog;
```

注意1：如果 MySQL 命令行或 JDBC 连接串中已经明确指定了数据目录，则以指定的为准，`default_init_catalog` 用户属性不生效；
注意2：如果用户属性 `default_init_catalog` 设置的数据目录已经不存在，则自动切换到默认的 `internal` 数据目录；
注意3：该功能从 v3.1.x 版本开始生效；

### 简单查询

可以通过 Doris 支持的任意 SQL 语句查询外部数据目录中的表。
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