github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/docs/generated/sql/bnf/add_column.bnf (about)

     1  alter_onetable_stmt ::=
     2  	'ALTER' 'TABLE' table_name 'ADD' column_name typename ( ( col_qualification ) )*
     3  	| 'ALTER' 'TABLE' table_name 'ADD' 'IF' 'NOT' 'EXISTS' column_name typename ( ( col_qualification ) )*
     4  	| 'ALTER' 'TABLE' table_name 'ADD' 'COLUMN' column_name typename ( ( col_qualification ) )*
     5  	| 'ALTER' 'TABLE' table_name 'ADD' 'COLUMN' 'IF' 'NOT' 'EXISTS' column_name typename ( ( col_qualification ) )*
     6  	| 'ALTER' 'TABLE' 'IF' 'EXISTS' table_name 'ADD' column_name typename ( ( col_qualification ) )*
     7  	| 'ALTER' 'TABLE' 'IF' 'EXISTS' table_name 'ADD' 'IF' 'NOT' 'EXISTS' column_name typename ( ( col_qualification ) )*
     8  	| 'ALTER' 'TABLE' 'IF' 'EXISTS' table_name 'ADD' 'COLUMN' column_name typename ( ( col_qualification ) )*
     9  	| 'ALTER' 'TABLE' 'IF' 'EXISTS' table_name 'ADD' 'COLUMN' 'IF' 'NOT' 'EXISTS' column_name typename ( ( col_qualification ) )*