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

     1  update_stmt ::=
     2  	( ( 'WITH' ( ( common_table_expr ) ( ( ',' common_table_expr ) )* ) | 'WITH' 'RECURSIVE' ( ( common_table_expr ) ( ( ',' common_table_expr ) )* ) ) |  ) 'UPDATE' ( ( table_name opt_index_flags ) | ( table_name opt_index_flags ) table_alias_name | ( table_name opt_index_flags ) 'AS' table_alias_name ) 'SET' ( ( ( ( column_name '=' a_expr ) | ( '(' ( ( ( column_name ) ) ( ( ',' ( column_name ) ) )* ) ')' '=' ( '(' select_stmt ')' | ( '(' ')' | '(' ( a_expr | a_expr ',' | a_expr ',' ( ( a_expr ) ( ( ',' a_expr ) )* ) ) ')' ) ) ) ) ) ( ( ',' ( ( column_name '=' a_expr ) | ( '(' ( ( ( column_name ) ) ( ( ',' ( column_name ) ) )* ) ')' '=' ( '(' select_stmt ')' | ( '(' ')' | '(' ( a_expr | a_expr ',' | a_expr ',' ( ( a_expr ) ( ( ',' a_expr ) )* ) ) ')' ) ) ) ) ) )* ) opt_from_list ( ( 'WHERE' a_expr ) |  ) ( sort_clause |  ) ( limit_clause |  ) ( 'RETURNING' target_list | 'RETURNING' 'NOTHING' |  )