An overview of the usage of ALTER TABLE for the TiDB database. /docs/dev/sql-statements/sql-statement-alter-table/ /docs/dev/reference/sql/statements/alter-table/ ...
'alter table tab1 add column col1 varchar(512), col2 varchar(512)' contains unsupported syntax. Falling back to parsing as a 'Command'. Command(this=alter, expression=table tab1 add column col1 ...