Help Center/ Distributed Database Middleware/ User Guide (ME-Abu Dhabi Region)/ SQL Syntax/ Database Management Syntax
Updated on 2022-02-22 GMT+08:00
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Database Management Syntax

Supported Database Management Syntax

  • SHOW Syntax
  • SHOW COLUMNS Syntax
  • SHOW CREATE TABLE Syntax
  • SHOW TABLE STATUS Syntax
  • SHOW TABLES Syntax
  • SHOW DATABASES
  • SHOW INDEX FROM
  • SHOW VARIABLES Syntax

Supported Database Tool Commands

  • DESC Syntax
  • USE Syntax
  • EXPLAIN Syntax

    Unlike EXPLAIN in MySQL, the output of DDM EXPLAIN describes the nodes that the current statement is routed to.

Unsupported Database Management Syntax

Table 1 Restrictions on database administration statements

Item

Restriction

Database administration statements
  • Executing SET Syntax to modify global variables is not supported.
  • SHOW TRIGGERS Syntax is not supported.

The following SHOW statements are randomly sent to a physical shard. If physical shards are on different RDS MySQL DB instances, the returned variables or table information may be different.

  • SHOW TABLE STATUS
  • SHOW VARIABLES Syntax
  • CHECK TABLE does not support sharding tables by hash or sharding key.
  • SHOW WARNINGS Syntax does not support the combination of LIMIT and COUNT.
  • SHOW ERRORS Syntax does not support the combination of LIMIT and COUNT.
Parent topic: SQL Syntax