zhilinli123 commented on code in PR #4757:
URL:
https://github.com/apache/incubator-seatunnel/pull/4757#discussion_r1196662781
##########
docs/en/connector-v2/sink/PostgreSql.md:
##########
@@ -0,0 +1,198 @@
+# PostgreSql
+
+> JDBC PostgreSql Sink Connector
+
+## Support Those Engines
+
+> Spark<br/>
+> Flink<br/>
+> Seatunnel Zeta<br/>
+
+## Key Features
+
+- [x] [exactly-once](../../concept/connector-v2-features.md)
+- [x] [cdc](../../concept/connector-v2-features.md)
+
+> Use `Xa transactions` to ensure `exactly-once`. So only support
`exactly-once` for the database which is
+> support `Xa transactions`. You can set `is_exactly_once=true` to enable it.
+
+## Description
+
+Write data through jdbc. Support Batch mode and Streaming mode, support
concurrent writing, support exactly-once
+semantics (using XA transaction guarantee).
+
+## Supported DataSource Info
+
+| Datasource | Supported Versions |
Driver | Url |
Maven |
+|------------|------------------------------------------------------------|-----------------------|---------------------------------------|--------------------------------------------------------------------------|
+| PostgreSQL | Different dependency version has different driver class. |
org.postgresql.Driver | jdbc:postgresql://localhost:5432/test |
[Download](https://mvnrepository.com/artifact/org.postgresql/postgresql) |
+| PostgreSQL | If you want to manipulate the GEOMETRY type in PostgreSQL. |
org.postgresql.Driver | jdbc:postgresql://localhost:5432/test |
[Download](https://mvnrepository.com/artifact/net.postgis/postgis-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 PostgreSQL datasource: cp postgresql-xxx.jar
$SEATNUNNEL_HOME/plugins/jdbc/lib/<br/>
+> If you want to manipulate the GEOMETRY type in PostgreSQL, add
postgresql-xxx.jar and postgis-jdbc-xxx.jar to
$SEATNUNNEL_HOME/plugins/jdbc/lib/
+
+## Data Type Mapping
+
+| PostgreSQL Data type |
Seatunnel Data type
|
+|----------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------|
+| BOOL<br/> |
BOOLEAN
|
+| _BOOL<br/> |
ARRAY<BOOLEAN>
|
+| BYTEA<br/> | BYTES
|
+| _BYTEA<br/> |
ARRAY<TINYINT>
|
+| INT2<br/>SMALLSERIAL<br/>INT4<br/>SERIAL<br/> | INT
|
+| _INT2<br/>_INT4<br/> |
ARRAY<INT>
|
+| INT8<br/>BIGSERIAL<br/> |
BIGINT
|
+| _INT8<br/> |
ARRAY<BIGINT>
|
+| FLOAT4<br/> | FLOAT
|
+| _FLOAT4<br/> |
ARRAY<FLOAT>
|
+| FLOAT8<br/> |
DOUBLE
|
+| _FLOAT8<br/> |
ARRAY<DOUBLE>
|
+| NUMERIC(Get the designated column's specified column size>0) |
DECIMAL(Get the designated column's specified column size,Gets the number of
digits in the specified column to the right of the decimal point) |
+| NUMERIC(Get the designated column's specified column size<0) |
DECIMAL(38, 18)
|
+| BPCHAR<br/>CHARACTER<br/>VARCHAR<br/>TEXT<br/>GEOMETRY<br/>GEOGRAPHY |
STRING
|
+| _BPCHAR<br/>_CHARACTER<br/>_VARCHAR<br/>_TEXT |
ARRAY<STRING>
|
+| TIMESTAMP<br/> |
TIMESTAMP
|
+| TIME<br/> | TIME
|
+| DATE<br/> | DATE
|
+| OTHER DATA TYPES | NOT
SUPPORTED YET
|
+
+## Options
+
+| Name | Type | Required | Default |
Description
|
+|-------------------------------------------|---------|----------|---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| url | String | Yes | - |
The URL of the JDBC connection. Refer to a case:
jdbc:postgresql://localhost:5432/test
|
+| driver | String | Yes | - |
The jdbc class name used to connect to the remote data source,<br/> if you use
PostgreSQL the value is `org.postgresql.Driver`.
|
+| user | String | No | - |
Connection instance user name
|
+| password | String | No | - |
Connection instance password
|
+| query | String | No | - |
Use this sql write upstream input datas to database. e.g `INSERT ...`,`query`
have the higher priority
|
+| database | String | No | - |
Use this `database` and `table-name` auto-generate sql and receive upstream
input datas write to database.<br/>This option is mutually exclusive with
`query` and has a higher priority.
|
+| table | String | No | - |
Use database and this table-name auto-generate sql and receive upstream input
datas write to database.<br/>This option is mutually exclusive with `query` and
has a higher priority. |
+| primary_keys | Array | No | - |
This option is used to support operations such as `insert`, `delete`, and
`update` when automatically generate sql.
|
+| support_upsert_by_query_primary_key_exist | Boolean | No | false |
Choose to use INSERT sql, UPDATE sql to process update events(INSERT,
UPDATE_AFTER) based on query primary key exists. This configuration is only
used when database unsupport upsert syntax. **Note**: that this method has low
performance |
+| connection_check_timeout_sec | Int | No | 30 |
The time in seconds to wait for the database operation used to validate the
connection to complete.
|
+| max_retries | Int | No | 0 |
The number of retries to submit failed (executeBatch)
|
+| batch_size | Int | No | 1000 |
For batch writing, when the number of buffered records reaches the number of
`batch_size` or the time reaches `batch_interval_ms`<br/>, the data will be
flushed into the database
|
+| batch_interval_ms | Int | No | 1000 |
For batch writing, when the number of buffers reaches the number of
`batch_size` or the time reaches `batch_interval_ms`, the data will be flushed
into the database
|
+| is_exactly_once | Boolean | No | false |
Whether to enable exactly-once semantics, which will use Xa transactions. If
on, you need to<br/>set `xa_data_source_class_name`.
|
+| generate_sink_sql | Boolean | No | false |
Generate sql statements based on the database table you want to write to.
|
+| xa_data_source_class_name | String | No | - |
The xa data source class name of the database Driver, for example, PostgreSQL
is `org.postgresql.xa.PGXADataSource`, and<br/>please refer to appendix for
other data sources
|
+| max_commit_attempts | Int | No | 3 |
The number of retries for transaction commit failures
|
+| transaction_timeout_sec | Int | No | -1 |
The timeout after the transaction is opened, the default is -1 (never timeout).
Note that setting the timeout may affect<br/>exactly-once semantics
|
+| auto_commit | Boolean | No | true |
Automatic transaction commit is enabled by default
|
+| common-options | | no | - |
Sink plugin common parameters, please refer to [Sink 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.
+
+## Task Example
+
+### Simple:
+
+> This example defines a SeaTunnel synchronization task that automatically
generates data through FakeSource and sends it to JDBC Sink. FakeSource
generates a total of 16 rows of data (row.num=16), with each row having two
fields, name (string type) and age (int type). The final target table is
test_table will also be 16 rows of data in the table. Before run this job, you
need create database test and table test_table in your PostgreSQL. And if you
have not yet installed and deployed SeaTunnel, you need to follow the
instructions in [Install SeaTunnel](../../start-v2/locally/deployment.md) to
install and deploy SeaTunnel. And then follow the instructions in [Quick Start
With SeaTunnel Engine](../../start-v2/locally/quick-start-seatunnel-engine.md)
to run this job.
+
+```
+# Defining the runtime environment
+env {
+ # You can set flink configuration here
+ execution.parallelism = 1
+ job.mode = "BATCH"
+}
+
+source {
+ FakeSource {
+ parallelism = 1
+ result_table_name = "fake"
+ row.num = 16
+ schema = {
+ fields {
+ name = "string"
+ age = "int"
+ }
+ }
+ }
+ # If you would like to get more information about how to configure seatunnel
and see full list of source plugins,
+ # please go to https://seatunnel.apache.org/docs/category/source-v2
+}
+
+transform {
+ # If you would like to get more information about how to configure seatunnel
and see full list of transform plugins,
+ # please go to https://seatunnel.apache.org/docs/category/transform-v2
+}
+
+sink {
+ jdbc {
+ url = "jdbc:postgresql://localhost:5432/test"
+ driver = "org.postgresql.Driver"
+ user = root
+ password = 123456
+ query = "insert into test_table(name,age) values(?,?)"
+ }
+ # If you would like to get more information about how to configure seatunnel
and see full list of sink plugins,
+ # please go to https://seatunnel.apache.org/docs/category/sink-v2
+}
+```
+
+> This example not need to write complex sql statements, you can configure
the database name table name to automatically generate add statements for you
+
+```
+sink {
+ Jdbc {
+ url = "jdbc:postgresql://localhost:5432/test"
+ driver = org.postgresql.Driver
+ user = root
+ password = 123456
+
+ generate_sink_sql = true
+ database = test
+ table = "public.test_table"
+ }
+}
+```
+
+### Exactly-once :
+
+> For accurate write scene we guarantee accurate once
+
+```
+sink {
+ jdbc {
+ url = "jdbc:postgresql://localhost:5432/test"
+ driver = "org.postgresql.Driver"
+
+ max_retries = 0
+ user = root
+ password = 123456
+ query = "insert into test_table(name,age) values(?,?)"
+
+ is_exactly_once = "true"
+
+ xa_data_source_class_name = "org.postgresql.xa.PGXADataSource"
+ }
+}
+```
+
Review Comment:
Line 149 has been added @EricJoy2048
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