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Statments
Data-Definition-Statements
Alter
ALTER-SQL-BLOCK-RULE

ALTER-SQL-BLOCK-RULE

Name

ALTER SQL BLOCK RULE

Description

Modify SQL blocking rules to allow modification of the following items: sql/sqlHash/partition_num/tablet_num/cardinality/global/enable.

Syntax:

ALTER SQL_BLOCK_RULE rule_name
[PROPERTIES ("key"="value", ...)];

Note:

  • sql and sqlHash cannot be set at the same time. This means that if a rule sets either sql or sqlHash, the other attribute cannot be modified;
  • sql/sqlHash and partition_num/tablet_num/cardinality cannot be set at the same time. For example, if a rule sets partition_num, then sql or sqlHash cannot be modified;

Example

  1. Modify according to SQL properties
ALTER SQL_BLOCK_RULE test_rule PROPERTIES("sql"="select \\* from test_table","enable"="true")
  1. If a rule sets partition_num, then sql or sqlHash cannot be modified
ALTER SQL_BLOCK_RULE test_rule2 PROPERTIES("partition_num" = "10","tablet_num"="300","enable"="true")

Keywords

ALTER,SQL_BLOCK_RULE

Best Practice