Help Center/ Database and Application Migration UGO/ User Guide/ Syntax Conversion/ Conversion Error Codes/ Error Codes Generated During Conversion from MySQL to GaussDB/ U0400002: The GaussDB table attribute does not support this collation
Updated on 2025-06-07 GMT+08:00
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U0400002: The GaussDB table attribute does not support this collation

Description

Database Type and Version

  1. Source database type and version: MySQL 5.5, 5.6, 5.7, and 8.0
  2. Target database type and version: GaussDB Distributed

Syntax Example

This error is reported because UGO does not convert the MySQL collation by default.

Different GaussDB versions support different character sets. A collation is a set of rules for comparing characters in a character set. For example, the following collation is not supported in GaussDB V2.0-8.0.

CREATE TABLE collate_demo(id INT, name VARCHAR(64)) COLLATE utf8mb3_general_ci;

Suggestion

Modify Support for COLLATE. You can comment out all collation rules or only the collation rules that are not supported by GaussDB. GaussDB supports the collation rules, but whether table-level character sets conflict with database-level character sets remains uncertain.

When initializing the GaussDB database, specify a character set compatible with the source database character set. During the migration, comment out all character sets and collations in the CREATE TABLE statement and use the default character set and collation of the GaussDB database. If the character set and collation in the original table is inconsistent with those in the database, you need to evaluate the risk and impact. For more information about the GaussDB collation, see GaussDB Developer Guide.