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[docs] Fix some wrong docs contents in engine-flink (#782)
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‎website/docs/engine-flink/getting-started.md‎

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@@ -46,7 +46,10 @@ Fluss only supports Apache Flink's Table API.
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| [SQL add partiiton](ddl.md#add-partition) | ✔️ | |
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| [SQL drop partiiton](ddl.md#drop-partition) | ✔️ | |
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| [SQL select](reads.md) | ✔️ | Support both streaming and batch mode. |
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| [SQL limit](reads.md#limit-read) | ✔️ | Only for Log Table |
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| [SQL insert into](writes.md) | ✔️ | Support both streaming and batch mode. |
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| [SQL delete from](writes.md#delete-from) | ✔️ | Only in batch mode. |
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| [SQL update](writes.md#update) | ✔️ | Only in batch mode. |
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| [SQL lookup join](lookups.md) | ✔️ | |
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## Preparation when using Flink SQL Client

‎website/docs/engine-flink/options.md‎

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```sql
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-- SQL hints on source tables
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SELECT * FROM log_table /*+ OPTIONS('client.scanner.log.check-crc' = '7d') */;
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SELECT * FROM log_table /*+ OPTIONS('client.scanner.log.check-crc' = 'false') */;
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-- SQL hints on sink tables
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INSERT INTO pk_table2 /*+ OPTIONS('sink.ignore-delete'='true') */ select * from pk_table1;
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## Lookup Options
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| Option | Type | Default | Description |
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|------------------------------------------|------------|------------|-----------------------------------------------------------------------------------------------------------------------------|
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| lookup.async | Boolean | true | Whether to use asynchronous lookup. Asynchronous lookup has better throughput performance than synchronous lookup. |
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| lookup.cache | Enum | optional | NONE | The caching strategy for this lookup table, including NONE, PARTIAL. |
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| lookup.max-retries | Integer | optional | 3 | The maximum allowed retries if a lookup operation fails. |
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| lookup.partial-cache.expire-after-access | Duration | optional | (none) | Duration to expire an entry in the cache after accessing. |
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| lookup.partial-cache.expire-after-write | Duration | optional | (none) | Duration to expire an entry in the cache after writing. |
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| lookup.partial-cache.cache-missing-key | Boolean | optional | true | Whether to store an empty value into the cache if the lookup key doesn't match any rows in the table. |
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| lookup.partial-cache.max-rows | Long | optional | true | The maximum number of rows to store in the cache. |
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| client.lookup.queue-size | Integer | 25600 | The maximum number of pending lookup operations. |
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| client.lookup.max-batch-size | Integer | 128 | The maximum batch size of merging lookup operations to one lookup request. |
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| client.lookup.max-inflight-requests | Integer | 128 | The maximum number of unacknowledged lookup requests for lookup operations. |
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| client.lookup.batch-timeout | Duration | 100ms | The maximum time to wait for the lookup batch to full, if this timeout is reached, the lookup batch will be closed to send. |
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| Option | Type | Default | Description |
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|------------------------------------------|------------|---------|-----------------------------------------------------------------------------------------------------------------------------|
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| lookup.async | Boolean | true | Whether to use asynchronous lookup. Asynchronous lookup has better throughput performance than synchronous lookup. |
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| lookup.cache | Enum | NONE | The caching strategy for this lookup table, including NONE, PARTIAL. | |
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| lookup.max-retries | Integer | 3 | The maximum allowed retries if a lookup operation fails. | |
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| lookup.partial-cache.expire-after-access | Duration | (none) | Duration to expire an entry in the cache after accessing. | |
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| lookup.partial-cache.expire-after-write | Duration | (none) | Duration to expire an entry in the cache after writing. | |
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| lookup.partial-cache.cache-missing-key | Boolean | true | Whether to store an empty value into the cache if the lookup key doesn't match any rows in the table. | |
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| lookup.partial-cache.max-rows | Long | (none) | The maximum number of rows to store in the cache. | |
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| client.lookup.queue-size | Integer | 25600 | The maximum number of pending lookup operations. |
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| client.lookup.max-batch-size | Integer | 128 | The maximum batch size of merging lookup operations to one lookup request. |
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| client.lookup.max-inflight-requests | Integer | 128 | The maximum number of unacknowledged lookup requests for lookup operations. |
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| client.lookup.batch-timeout | Duration | 100ms | The maximum time to wait for the lookup batch to full, if this timeout is reached, the lookup batch will be closed to send. |
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## Write Options

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