[#3001] docs(spark-connector): add spark connector document #3018
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jerryshao
reviewed
Apr 19, 2024
| 3. Execute the spark sql query. | ||
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| Suppose there are two catalogs in the metalake `test`, `hive` and `iceberg`, and the table `hive_table1` in the catalog `hive`, and the table `iceberg_table1` in the catalog `iceberg`. | ||
| ```sql |
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add blank line between paragraphs.
jerryshao
reviewed
Apr 19, 2024
| use hive; | ||
| select * from db.hive_table1; | ||
| ``` | ||
| :::info |
jerryshao
reviewed
Apr 19, 2024
| select * from db.hive_table1; | ||
| ``` | ||
| :::info | ||
| The command SHOW CATALOGS will only display the Spark default catalog, named spark_catalog, due to limitations within the Spark catalog manager. It does not list the catalogs present in the metalake. However, after explicitly using the USING CATALOG command with a specific catalog name, that catalog name then becomes visible in the output of SHOW CATALOGS. |
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Please use backquotes "`" in "SHOW CATALOGS".
jerryshao
reviewed
Apr 19, 2024
| This software is licensed under the Apache License version 2." | ||
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| With the Gravitino Spark connector, accessing data or managing metadata in Hive catalogs becomes straightforward, enabling seamless federation queries across different Hive catalogs. |
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Do you have some Hive or Iceberg specific configurations that should be listed here?
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no, the configurations are retrivied from Gravitino server.
jerryshao
reviewed
Apr 19, 2024
| [ COMMENT table_comment ] | ||
| [ TBLPROPERTIES ( key1=val1, key2=val2, ... ) ] | ||
| [ AS select_statement ] | ||
| ``` |
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Do you need to add more SQL examples about DDL, DML and DQL to show users how to use it.
jerryshao
reviewed
Apr 22, 2024
| ```sql | ||
| select * from hive.db.hive_table1 union all select * from iceberg.db.iceberg_table1; | ||
| use hive; | ||
| select * from db.hive_table1; |
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Uppercase all the SQL reserved words.
jerryshao
approved these changes
Apr 22, 2024
diqiu50
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Jun 13, 2024
…ache#3018) ### What changes were proposed in this pull request? add spark connector document ### Why are the changes needed? Fix: apache#3001 ### Does this PR introduce _any_ user-facing change? no ### How was this patch tested? document
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What changes were proposed in this pull request?
add spark connector document
Why are the changes needed?
Fix: #3001
Does this PR introduce any user-facing change?
no
How was this patch tested?
document