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Update according to reviews 11/01/2024
Various style fixes and cleanup (#15) (#17) Co-authored-by: Martin Traverso <[email protected]> Various style fixes and cleanup (#15) Update the github CI (#12) * Add Snowflake JDBC Connector * Add snowflake in the ci Add Snowflake JDBC Connector (#11) Had to redo the connector because all the rebases caused havoc
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| # Snowflake connector | ||
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| ```{raw} html | ||
| <img src="../_static/img/snowflake.png" class="connector-logo"> | ||
| ``` | ||
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| The Snowflake connector allows querying and creating tables in an | ||
| external [Snowflake](https://www.snowflake.com/) account. This can be used to join data between | ||
| different systems like Snowflake and Hive, or between two different | ||
| Snowflake accounts. | ||
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| ## Configuration | ||
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| To configure the Snowflake connector, create a catalog properties file | ||
| in `etc/catalog` named, for example, `example.properties`, to | ||
| mount the Snowflake connector as the `snowflake` catalog. | ||
| Create the file with the following contents, replacing the | ||
| connection properties as appropriate for your setup: | ||
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| ```none | ||
| connector.name=snowflake | ||
| connection-url=jdbc:snowflake://<account>.snowflakecomputing.com | ||
| connection-user=root | ||
| connection-password=secret | ||
| snowflake.account=account | ||
| snowflake.database=database | ||
| snowflake.role=role | ||
| snowflake.warehouse=warehouse | ||
| ``` | ||
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| ### Arrow serialization support | ||
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| This is an experimental feature which introduces support for using Apache Arrow | ||
| as the serialization format when reading from Snowflake. Please note there are | ||
| a few caveats: | ||
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| - Using Apache Arrow serialization is disabled by default. In order to enable | ||
| it, add `--add-opens=java.base/java.nio=ALL-UNNAMED` to the Trino | ||
| {ref}`jvm-config`. | ||
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| ### Multiple Snowflake databases or accounts | ||
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| The Snowflake connector can only access a single database within | ||
| a Snowflake account. Thus, if you have multiple Snowflake databases, | ||
| or want to connect to multiple Snowflake accounts, you must configure | ||
| multiple instances of the Snowflake connector. | ||
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| % snowflake-type-mapping: | ||
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| ## Type mapping | ||
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| Trino supports the following Snowflake data types: | ||
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| | Snowflake Type | Trino Type | | ||
| | -------------- | -------------- | | ||
| | `boolean` | `boolean` | | ||
| | `tinyint` | `bigint` | | ||
| | `smallint` | `bigint` | | ||
| | `byteint` | `bigint` | | ||
| | `int` | `bigint` | | ||
| | `integer` | `bigint` | | ||
| | `bigint` | `bigint` | | ||
| | `float` | `real` | | ||
| | `real` | `real` | | ||
| | `double` | `double` | | ||
| | `decimal` | `decimal(P,S)` | | ||
| | `varchar(n)` | `varchar(n)` | | ||
| | `char(n)` | `varchar(n)` | | ||
| | `binary(n)` | `varbinary` | | ||
| | `varbinary` | `varbinary` | | ||
| | `date` | `date` | | ||
| | `time` | `time` | | ||
| | `timestampntz` | `timestamp` | | ||
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| Complete list of [Snowflake data types](https://docs.snowflake.com/en/sql-reference/intro-summary-data-types.html). | ||
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| (snowflake-sql-support)= | ||
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| ## SQL support | ||
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| The connector provides read access and write access to data and metadata in | ||
| a Snowflake database. In addition to the {ref}`globally available | ||
| <sql-globally-available>` and {ref}`read operation <sql-read-operations>` | ||
| statements, the connector supports the following features: | ||
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| - {doc}`/sql/insert` | ||
| - {doc}`/sql/delete` | ||
| - {doc}`/sql/truncate` | ||
| - {doc}`/sql/create-table` | ||
| - {doc}`/sql/create-table-as` | ||
| - {doc}`/sql/drop-table` | ||
| - {doc}`/sql/alter-table` | ||
| - {doc}`/sql/create-schema` | ||
| - {doc}`/sql/drop-schema` |
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