Create a Redis table to connect to the source stream.

For details about the JOIN syntax, see JOIN Between Stream Data and Table Data.

Syntax

CREATE TABLE table_id (key_attr_name STRING(, hash_key_attr_name STRING)?, value_attr_name STRING)
  WITH (
    type = "dcs_redis",
    cluster_address = ""(,password = "")?,
    value_type= "",
    key_column= ""(,hash_key_column="")?);

Keywords

**Table 1** Keywords
Parameter	Mandatory	Description
type	Yes	Output channel type. Value dcs_redis indicates that data is exported to DCS Redis.
cluster_address	Yes	Redis instance connection address.
password	No	Redis instance connection password. This parameter is not required if password-free access is used.
value_type	Yes	Indicates the field data type. Supported data types include string, list, hash, set, and zset.
key_column	Yes	Indicates the column name of the Redis key attribute.
hash_key_column	No	If value_type is set to hash, this field must be specified as the column name of the level-2 key attribute.
cache_max_num	No	Indicates the maximum number of cached query results. The default value is 32768.
cache_time	No	Indicates the maximum duration for caching database query results in the memory. The unit is millisecond. The default value is 10000. The value 0 indicates that caching is disabled.

Precautions

Redis clusters are not supported.
Ensure that You have created a Redis cache instance on DCS using your account.
In this scenario, jobs must run on the dedicated queue of DLI. Therefore, DLI must interconnect with the enhanced datasource connection that has been connected with DCS instance. You can also set the security group rules as required.
For details about how to create an enhanced datasource connection, see Enhanced Datasource Connections in the Data Lake Insight User Guide.

For details about how to configure security group rules, see Security Group in the Virtual Private Cloud User Guide.

Example

The Redis table is used to connect to the source stream.

CREATE TABLE table_a (attr1 string, attr2 string, attr3 string)
  WITH (
    type = "dcs_redis",
    value_type = "hash",
    key_column = "attr1",
    hash_key_column = "attr2",
    cluster_address = "192.168.1.238:6379",
    password = "xxxxxxxx"
 );

Creating a Redis Table

Syntax

Keywords

Precautions

Example