ic4y commented on code in PR #4470:
URL:
https://github.com/apache/incubator-seatunnel/pull/4470#discussion_r1197476988
##########
docs/en/connector-v2/source/Snowflake.md:
##########
@@ -0,0 +1,151 @@
+# Snowflake
+
+> JDBC Snowflake Source Connector
+>
+> ## Support those engines
+>
+> Spark<br/>
+> Flink<br/>
+> Seatunnel Zeta<br/>
+>
+ ## Key features
+
+- [x] [batch](../../concept/connector-v2-features.md)
+- [ ] [stream](../../concept/connector-v2-features.md)
+- [ ] [exactly-once](../../concept/connector-v2-features.md)
+- [x] [column projection](../../concept/connector-v2-features.md)
+- [x] [parallelism](../../concept/connector-v2-features.md)
+- [x] [support user-defined split](../../concept/connector-v2-features.md)
+
+> supports query SQL and can achieve projection effect.
+>
+ ## Description
+
+Read external data source data through JDBC.
+
+## Supported DataSource list
+
+| datasource | supported versions |
driver | url
| maven
|
+|------------|----------------------------------------------------------|-------------------------------------------|--------------------------------------------------------|-----------------------------------------------------------------------------|
+| snowflake | Different dependency version has different driver class. |
net.snowflake.client.jdbc.SnowflakeDriver |
jdbc:snowflake://<account_name>.snowflakecomputing.com |
[Download](https://mvnrepository.com/artifact/net.snowflake/snowflake-jdbc) |
+
+## Database dependency
+
+> Please download the support list corresponding to 'Maven' and copy it to the
'$SEATNUNNEL_HOME/plugins/jdbc/lib/' working directory<br/>
+> For example Snowflake datasource: cp snowflake-connector-java-xxx.jar
$SEATNUNNEL_HOME/plugins/jdbc/lib/
+>
+ ## Data Type Mapping
+
+| Snowflake Data type
| Seatunnel Data type |
+|-----------------------------------------------------------------------------|---------------------|
+| BOOLEAN
| BOOLEAN |
+| TINYINT<br/>SMALLINT<br/>BYTEINT<br/>
| SHORT_TYPE |
+| INT<br/>INTEGER<br/>
| INT |
+| BIGINT
| LONG |
+| DECIMAL<br/>NUMERIC<br/>NUMBER<br/>
| DECIMAL(x,y) |
+| DECIMAL(x,y)(Get the designated column's specified column size.>38)
| DECIMAL(38,18) |
+| REAL<br/>FLOAT4
| FLOAT |
+| DOUBLE<br/>DOUBLE PRECISION<br/>FLOAT8<br/>FLOAT<br/>
| DOUBLE |
+| CHAR<br/>CHARACTER<br/>VARCHAR<br/>STRING<br/>TEXT<br/>VARIANT<br/>OBJECT
| STRING |
+| DATE
| DATE |
+| TIME
| TIME |
+| DATETIME<br/>TIMESTAMP<br/>TIMESTAMP_LTZ<br/>TIMESTAMP_NTZ<br/>TIMESTAMP_TZ
| TIMESTAMP |
+| BINARY<br/>VARBINARY
| BYTES |
+| GEOGRAPHY (WKB or EWKB)<br/>GEOMETRY (WKB or EWKB)
| BYTES |
+| GEOGRAPHY (GeoJSON, WKT or EWKT)<br/>GEOMETRY (GeoJSON, WKB or EWKB)
| STRING |
+
+## Options
+
+| name | type | required | default |
description
|
+|------------------------------|--------|----------|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| url | String | Yes | - | The URL
of the JDBC connection. Refer to a case:
jdbc:snowflake://<account_name>.snowflakecomputing.com
|
+| driver | String | Yes | - | The
jdbc class name used to connect to the remote data source,<br/> if you use
Snowflake the value is `net.snowflake.client.jdbc.SnowflakeDriver`.
|
+| user | String | No | - |
Connection instance user name
|
+| password | String | No | - |
Connection instance password
|
+| query | String | Yes | - | Query
statement
|
+| connection_check_timeout_sec | Int | No | 30 | The
time in seconds to wait for the database operation used to validate the
connection to complete
|
+| partition_column | String | No | - | The
column name for parallelism's partition, only support numeric type,Only support
numeric type primary key, and only can config one column.
|
+| partition_lower_bound | Long | No | - | The
partition_column min value for scan, if not set SeaTunnel will query database
get min value.
|
+| partition_upper_bound | Long | No | - | The
partition_column max value for scan, if not set SeaTunnel will query database
get max value.
|
+| partition_num | Int | No | job parallelism | The
number of partition count, only support positive integer. default value is job
parallelism
|
+| fetch_size | Int | No | 0 | For
queries that return a large number of objects,you can configure<br/> the row
fetch size used in the query toimprove performance by<br/> reducing the number
database hits required to satisfy the selection criteria.<br/> Zero means use
jdbc default value. |
+| common-options | | No | - | Source
plugin common parameters, please refer to [Source Common
Options](common-options.md) for details
|
+
+## tips
+
+> If partition_column is not set, it will run in single concurrency, and if
partition_column is set, it will be executed in parallel according to the
concurrency of tasks.
Review Comment:
Add tips on how to configure GEOGRAPHY_OUTPUT_FORMAT='EWKT' and
GEOMETRY_OUTPUT_FORMAT='EWKT'
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