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    Bug#28318 CREATE FUNCTION (UDF) requires a schema · ad104d5b
    unknown authored
    Bug#29816 Syntactically wrong query fails with misleading error message
    
    The core problem is that an SQL-invoked function name can be a <schema
    qualified routine name> that contains no <schema name>, but the mysql
    parser insists that all stored procedures (function, procedures and
    triggers) must have a <schema name>, which is not true for functions.
    This problem is especially visible when trying to create a function
    or when a query contains a syntax error after a function call (in the
    same query), both will fail with a "No database selected" message if
    the session is not attached to a particular schema, but the first
    one should succeed and the second fail with a "syntax error" message.
    
    Part of the fix is to revamp the sp name handling so that a schema
    name may be omitted for functions -- this means that the internal
    function name representation may not have a dot, which represents
    that the function doesn't have a schema name. The other part is
    to place schema checks after the type (function, trigger or procedure)
    of the routine is known.
    
    
    mysql-test/r/sp-error.result:
      Add test case result for Bug#29816
    mysql-test/r/udf.result:
      Add test case result for Bug#28318
    mysql-test/t/sp-error.test:
      Add test case for Bug#29816
    mysql-test/t/udf.test:
      Add test case for Bug#28318
    sql/sp.cc:
      Copy the (last) nul byte of the stored routine key and move name parsing
      code to the sp_name class constructor.
    sql/sp_head.cc:
      Revamp routine name parsing for when no schema is specified and
      omit dot from the qualified name if the routine is not associated
      with a scheme name.
    sql/sp_head.h:
      Name parsing got bigger, uninline by moving to a single unit -- the sp_head.cc
      file.
    sql/sql_yacc.yy:
      Only copy the schema name if one is actually set and check for schema
      name presence only where it's necessary.
    ad104d5b
sp.cc 55.2 KB