"=?gb18030?B?ucKwwdChtv6hq7Ci4+U=?=" <2903807914@xxxxxx> writes: > # Description of Requirement: > 1¡¢select ¡Ì num1; function > 2¡¢The value of num1 is required to be: [0,9223372036854775807] > 3¡¢¡Ì The operation does not allow decimals Looks suspiciously like a homework assignment. > I have now developed this feature on the PostgreSQL 14.0 kernel! But it affects the original function of the database: > # Affected place > 1¡¢ := assignment operator > 2¡¢ Operator in 1..10 Today's lesson is: read the comments on the code you're modifying. Notably on gram.y's list of "non keyword" tokens: * Non-keyword token types. These are hard-wired into the "flex" lexer. * They must be listed first so that their numeric codes do not depend on * the set of keywords. PL/pgSQL depends on this so that it can share the * same lexer. If you add/change tokens here, fix PL/pgSQL to match! Since you didn't do that, PL/pgSQL is confused about the token codes in use for DOT_DOT and so on. regards, tom lane
