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ba5482ffc2
Running an UPDATE statement in PS mode and having positional parameter(s) bound with an array of actual values (that is prepared to be run in bulk mode) results in incorrect behaviour in presence of on update trigger that also executes an UPDATE statement. The same is true for handling a DELETE statement in presence of on delete trigger. Typically, the visible effect of such incorrect behaviour is expressed in a wrong number of updated/deleted rows of a target table. Additionally, in case UPDATE statement, a number of modified rows and a state message returned by a statement contains wrong information about a number of modified rows. The reason for incorrect number of updated/deleted rows is that a data structure used for binding positional argument with its actual values is stored in THD (this is thd->bulk_param) and reused on processing every INSERT/UPDATE/DELETE statement. It leads to consuming actual values bound with top-level UPDATE/DELETE statement by other DML statements used by triggers' body. To fix the issue, reset the thd->bulk_param temporary to the value nullptr before invoking triggers and restore its value on finishing its execution. The second part of the problem relating with wrong value of affected rows reported by Connector/C API is caused by the fact that diagnostics area is reused by an original DML statement and a statement invoked by a trigger. This fact should be take into account on finalizing a state of diagnostics area on completion running of a statement. Important remark: in case the macros DBUG_OFF is on, call of the method Diagnostics_area::reset_diagnostics_area() results in reset of the data members m_affected_rows, m_statement_warn_count. Values of these data members of the class Diagnostics_area are used on sending OK and EOF messages. In case DML statement is executed in PS bulk mode such resetting results in sending wrong result values to a client for affected rows in case the DML statement fires a triggers. So, reset these data members only in case the current statement being processed is not run in bulk mode.
1037 lines
30 KiB
C++
1037 lines
30 KiB
C++
/* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
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/**********************************************************************
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This file contains the implementation of error and warnings related
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- Whenever an error or warning occurred, it pushes it to a warning list
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that the user can retrieve with SHOW WARNINGS or SHOW ERRORS.
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- For each statement, we return the number of warnings generated from this
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command. Note that this can be different from @@warning_count as
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we reset the warning list only for questions that uses a table.
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This is done to allow on to do:
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INSERT ...;
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SELECT @@warning_count;
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SHOW WARNINGS;
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(If we would reset after each command, we could not retrieve the number
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of warnings)
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- When client requests the information using SHOW command, then
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server processes from this list and returns back in the form of
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resultset.
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Supported syntaxes:
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SHOW [COUNT(*)] ERRORS [LIMIT [offset,] rows]
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SHOW [COUNT(*)] WARNINGS [LIMIT [offset,] rows]
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SELECT @@warning_count, @@error_count;
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***********************************************************************/
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#include "mariadb.h"
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#include "sql_priv.h"
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#include "unireg.h"
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#include "sql_error.h"
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#include "sp_rcontext.h"
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/*
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Design notes about Sql_condition::m_message_text.
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The member Sql_condition::m_message_text contains the text associated with
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an error, warning or note (which are all SQL 'conditions')
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Producer of Sql_condition::m_message_text:
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----------------------------------------
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(#1) the server implementation itself, when invoking functions like
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my_error() or push_warning()
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(#2) user code in stored programs, when using the SIGNAL statement.
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(#3) user code in stored programs, when using the RESIGNAL statement.
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When invoking my_error(), the error number and message is typically
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provided like this:
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- my_error(ER_WRONG_DB_NAME, MYF(0), ...);
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- my_message(ER_SLAVE_IGNORED_TABLE, ER(ER_SLAVE_IGNORED_TABLE), MYF(0));
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In both cases, the message is retrieved from ER(ER_XXX), which in turn
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is read from the resource file errmsg.sys at server startup.
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The strings stored in the errmsg.sys file are expressed in the character set
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that corresponds to the server --language start option
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(see error_message_charset_info).
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When executing:
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- a SIGNAL statement,
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- a RESIGNAL statement,
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the message text is provided by the user logic, and is expressed in UTF8.
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Storage of Sql_condition::m_message_text:
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---------------------------------------
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(#4) The class Sql_condition is used to hold the message text member.
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This class represents a single SQL condition.
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(#5) The class Warning_info represents a SQL condition area, and contains
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a collection of SQL conditions in the Warning_info::m_warn_list
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Consumer of Sql_condition::m_message_text:
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----------------------------------------
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(#6) The statements SHOW WARNINGS and SHOW ERRORS display the content of
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the warning list.
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(#7) The GET DIAGNOSTICS statement (planned, not implemented yet) will
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also read the content of:
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- the top level statement condition area (when executed in a query),
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- a sub statement (when executed in a stored program)
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and return the data stored in a Sql_condition.
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(#8) The RESIGNAL statement reads the Sql_condition caught by an exception
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handler, to raise a new or modified condition (in #3).
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The big picture
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---------------
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--------------
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V |
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my_error(#1) SIGNAL(#2) RESIGNAL(#3) |
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|(#A) |(#B) |(#C) |
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----------------------------|---------------------------- |
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V |
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Sql_condition(#4) |
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V |
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Warning_info(#5) |
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----------------------------------------------------- |
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V V V |
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SHOW WARNINGS(#6) GET DIAGNOSTICS(#7) RESIGNAL(#8) |
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| -------- | V |
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| | | --------------
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V | |
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Connectors | |
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-------------------------
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V
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Client application
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Current implementation status
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-----------------------------
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(#1) (my_error) produces data in the 'error_message_charset_info' CHARSET
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(#2) and (#3) (SIGNAL, RESIGNAL) produces data internally in UTF8
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(#6) (SHOW WARNINGS) produces data in the 'error_message_charset_info' CHARSET
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(#7) (GET DIAGNOSTICS) is not implemented.
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(#8) (RESIGNAL) produces data internally in UTF8 (see #3)
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As a result, the design choice for (#4) and (#5) is to store data in
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the 'error_message_charset_info' CHARSET, to minimize impact on the code base.
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This is implemented by using 'String Sql_condition::m_message_text'.
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The UTF8 -> error_message_charset_info conversion is implemented in
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Sql_cmd_common_signal::eval_signal_informations() (for path #B and #C).
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Future work
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-----------
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- Change (#1) (my_error) to generate errors in UTF8.
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See WL#751 (Recoding of error messages)
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- Change (#4 and #5) to store message text in UTF8 natively.
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In practice, this means changing the type of the message text to
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'<UTF8 String 128 class> Sql_condition::m_message_text', and is a direct
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consequence of WL#751.
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- Implement (#9) (GET DIAGNOSTICS).
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See WL#2111 (Stored Procedures: Implement GET DIAGNOSTICS)
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*/
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static void copy_string(MEM_ROOT *mem_root, String* dst, const String* src)
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{
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size_t len= src->length();
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if (len)
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{
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char* copy= (char*) alloc_root(mem_root, len + 1);
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if (copy)
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{
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memcpy(copy, src->ptr(), len);
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copy[len]= '\0';
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dst->set(copy, len, src->charset());
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}
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}
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else
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dst->length(0);
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}
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void
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Sql_condition::copy_opt_attributes(const Sql_condition *cond)
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{
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DBUG_ASSERT(this != cond);
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copy_string(m_mem_root, & m_class_origin, & cond->m_class_origin);
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copy_string(m_mem_root, & m_subclass_origin, & cond->m_subclass_origin);
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copy_string(m_mem_root, & m_constraint_catalog, & cond->m_constraint_catalog);
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copy_string(m_mem_root, & m_constraint_schema, & cond->m_constraint_schema);
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copy_string(m_mem_root, & m_constraint_name, & cond->m_constraint_name);
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copy_string(m_mem_root, & m_catalog_name, & cond->m_catalog_name);
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copy_string(m_mem_root, & m_schema_name, & cond->m_schema_name);
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copy_string(m_mem_root, & m_table_name, & cond->m_table_name);
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copy_string(m_mem_root, & m_column_name, & cond->m_column_name);
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copy_string(m_mem_root, & m_cursor_name, & cond->m_cursor_name);
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}
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void
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Sql_condition::set_builtin_message_text(const char* str)
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{
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/*
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See the comments
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"Design notes about Sql_condition::m_message_text."
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*/
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const char* copy;
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copy= strdup_root(m_mem_root, str);
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m_message_text.set(copy, strlen(copy), error_message_charset_info);
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DBUG_ASSERT(! m_message_text.is_alloced());
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}
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const char*
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Sql_condition::get_message_text() const
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{
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return m_message_text.ptr();
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}
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int
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Sql_condition::get_message_octet_length() const
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{
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return m_message_text.length();
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}
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void Sql_state_errno_level::assign_defaults(const Sql_state_errno *from)
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{
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DBUG_ASSERT(from);
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int sqlerrno= from->get_sql_errno();
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/*
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SIGNAL is restricted in sql_yacc.yy to only signal SQLSTATE conditions.
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*/
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DBUG_ASSERT(from->has_sql_state());
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set_sqlstate(from);
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/* SQLSTATE class "00": illegal, rejected in the parser. */
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DBUG_ASSERT(m_sqlstate[0] != '0' || get_sqlstate()[1] != '0');
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if (Sql_state::is_warning()) /* SQLSTATE class "01": warning. */
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{
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m_level= Sql_condition::WARN_LEVEL_WARN;
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m_sql_errno= sqlerrno ? sqlerrno : ER_SIGNAL_WARN;
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}
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else if (Sql_state::is_not_found()) /* SQLSTATE class "02": not found. */
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{
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m_level= Sql_condition::WARN_LEVEL_ERROR;
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m_sql_errno= sqlerrno ? sqlerrno : ER_SIGNAL_NOT_FOUND;
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}
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else /* other SQLSTATE classes : error. */
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{
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m_level= Sql_condition::WARN_LEVEL_ERROR;
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m_sql_errno= sqlerrno ? sqlerrno : ER_SIGNAL_EXCEPTION;
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}
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}
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void Sql_condition::assign_defaults(THD *thd, const Sql_state_errno *from)
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{
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if (from)
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Sql_state_errno_level::assign_defaults(from);
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if (!get_message_text())
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set_builtin_message_text(ER(get_sql_errno()));
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}
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Diagnostics_area::Diagnostics_area(bool initialize)
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: is_bulk_execution(0), m_main_wi(0, false, initialize)
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{
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push_warning_info(&m_main_wi);
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reset_diagnostics_area();
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}
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Diagnostics_area::Diagnostics_area(ulonglong warning_info_id,
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bool allow_unlimited_warnings,
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bool initialize)
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: is_bulk_execution(0),
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m_main_wi(warning_info_id, allow_unlimited_warnings, initialize)
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{
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push_warning_info(&m_main_wi);
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reset_diagnostics_area();
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}
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/**
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Clear this diagnostics area.
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Normally called at the end of a statement.
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*/
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void
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Diagnostics_area::reset_diagnostics_area()
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{
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DBUG_ENTER("reset_diagnostics_area");
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m_skip_flush= FALSE;
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#ifdef DBUG_OFF
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m_can_overwrite_status= FALSE;
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/** Don't take chances in production */
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m_message[0]= '\0';
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Sql_state_errno::clear();
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Sql_user_condition_identity::clear();
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m_last_insert_id= 0;
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if (!is_bulk_op())
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{
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m_affected_rows= 0;
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m_statement_warn_count= 0;
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}
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#endif
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get_warning_info()->clear_error_condition();
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set_is_sent(false);
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/** Tiny reset in debug mode to see garbage right away */
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if (!is_bulk_op())
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/*
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For BULK DML operations (e.g. UPDATE) the data member m_status
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has the value DA_OK_BULK. Keep this value in order to handle
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m_affected_rows, m_statement_warn_count in correct way. Else,
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the number of rows and the number of warnings affected by
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the last statement executed as part of a trigger fired by the dml
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(e.g. UPDATE statement fires a trigger on AFTER UPDATE) would counts
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rows modified by trigger's statement.
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*/
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m_status= DA_EMPTY;
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DBUG_VOID_RETURN;
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}
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/**
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Set OK status -- ends commands that do not return a
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result set, e.g. INSERT/UPDATE/DELETE.
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*/
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void
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Diagnostics_area::set_ok_status(ulonglong affected_rows,
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ulonglong last_insert_id,
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const char *message)
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{
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DBUG_ENTER("set_ok_status");
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DBUG_ASSERT(!is_set() || (m_status == DA_OK_BULK && is_bulk_op()));
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/*
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In production, refuse to overwrite an error or a custom response
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with an OK packet.
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*/
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if (unlikely(is_error() || is_disabled()))
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return;
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/*
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When running a bulk operation, m_status will be DA_OK for the first
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operation and set to DA_OK_BULK for all following operations.
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*/
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if (m_status == DA_OK_BULK)
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{
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m_statement_warn_count+= current_statement_warn_count();
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m_affected_rows+= affected_rows;
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}
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else
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{
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m_statement_warn_count= current_statement_warn_count();
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m_affected_rows= affected_rows;
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m_status= (is_bulk_op() ? DA_OK_BULK : DA_OK);
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}
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m_last_insert_id= last_insert_id;
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if (message)
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strmake_buf(m_message, message);
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else
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m_message[0]= '\0';
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DBUG_VOID_RETURN;
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}
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/**
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Set EOF status.
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*/
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void
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Diagnostics_area::set_eof_status(THD *thd)
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{
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DBUG_ENTER("set_eof_status");
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/* Only allowed to report eof if has not yet reported an error */
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DBUG_ASSERT(!is_set() || (m_status == DA_EOF_BULK && is_bulk_op()));
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/*
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In production, refuse to overwrite an error or a custom response
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with an EOF packet.
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*/
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if (unlikely(is_error() || is_disabled()))
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return;
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/*
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If inside a stored procedure, do not return the total
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number of warnings, since they are not available to the client
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anyway.
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*/
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if (m_status == DA_EOF_BULK)
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{
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if (!thd->spcont)
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m_statement_warn_count+= current_statement_warn_count();
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}
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else
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{
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if (thd->spcont)
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{
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m_statement_warn_count= 0;
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m_affected_rows= 0;
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}
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else
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m_statement_warn_count= current_statement_warn_count();
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m_status= (is_bulk_op() ? DA_EOF_BULK : DA_EOF);
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}
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DBUG_VOID_RETURN;
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}
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/**
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Set ERROR status in the Diagnostics Area. This function should be used to
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report fatal errors (such as out-of-memory errors) when no further
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processing is possible.
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@param sql_errno SQL-condition error number
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*/
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void
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Diagnostics_area::set_error_status(uint sql_errno)
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{
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set_error_status(sql_errno,
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ER(sql_errno),
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mysql_errno_to_sqlstate(sql_errno),
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Sql_user_condition_identity(),
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NULL);
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}
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/**
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Set ERROR status in the Diagnostics Area.
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@note error_condition may be NULL. It happens if a) OOM error is being
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reported; or b) when Warning_info is full.
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@param sql_errno SQL-condition error number
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@param message SQL-condition message
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@param sqlstate SQL-condition state
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@param ucid User defined condition identity
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@param error_condition SQL-condition object representing the error state
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@note Note, that error_condition may be NULL. It happens if a) OOM error is
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being reported; or b) when Warning_info is full.
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*/
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void
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Diagnostics_area::set_error_status(uint sql_errno,
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const char *message,
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const char *sqlstate,
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const Sql_user_condition_identity &ucid,
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const Sql_condition *error_condition)
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{
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DBUG_ENTER("set_error_status");
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DBUG_PRINT("enter", ("error: %d", sql_errno));
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/*
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Only allowed to report error if has not yet reported a success
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The only exception is when we flush the message to the client,
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an error can happen during the flush.
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*/
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DBUG_ASSERT(! is_set() || m_can_overwrite_status);
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// message must be set properly by the caller.
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DBUG_ASSERT(message);
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// sqlstate must be set properly by the caller.
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DBUG_ASSERT(sqlstate);
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|
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#ifdef DBUG_OFF
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/*
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In production, refuse to overwrite a custom response with an
|
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ERROR packet.
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*/
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if (is_disabled())
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return;
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#endif
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Sql_state_errno::set(sql_errno, sqlstate);
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Sql_user_condition_identity::set(ucid);
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strmake_buf(m_message, message);
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get_warning_info()->set_error_condition(error_condition);
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m_status= DA_ERROR;
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DBUG_VOID_RETURN;
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}
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/**
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Mark the diagnostics area as 'DISABLED'.
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|
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This is used in rare cases when the COM_ command at hand sends a response
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in a custom format. One example is the query cache, another is
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COM_STMT_PREPARE.
|
|
*/
|
|
|
|
void
|
|
Diagnostics_area::disable_status()
|
|
{
|
|
DBUG_ENTER("disable_status");
|
|
DBUG_ASSERT(! is_set());
|
|
m_status= DA_DISABLED;
|
|
DBUG_VOID_RETURN;
|
|
}
|
|
|
|
Warning_info::Warning_info(ulonglong warn_id_arg,
|
|
bool allow_unlimited_warnings, bool initialize)
|
|
:m_current_statement_warn_count(0),
|
|
m_current_row_for_warning(1),
|
|
m_warn_id(warn_id_arg),
|
|
m_error_condition(NULL),
|
|
m_allow_unlimited_warnings(allow_unlimited_warnings),
|
|
initialized(0),
|
|
m_read_only(FALSE)
|
|
{
|
|
m_warn_list.empty();
|
|
memset(m_warn_count, 0, sizeof(m_warn_count));
|
|
if (initialize)
|
|
init();
|
|
}
|
|
|
|
void Warning_info::init()
|
|
{
|
|
/* Initialize sub structures */
|
|
DBUG_ASSERT(initialized == 0);
|
|
init_sql_alloc(PSI_INSTRUMENT_ME, &m_warn_root, WARN_ALLOC_BLOCK_SIZE,
|
|
WARN_ALLOC_PREALLOC_SIZE, MYF(MY_THREAD_SPECIFIC));
|
|
initialized= 1;
|
|
}
|
|
|
|
void Warning_info::free_memory()
|
|
{
|
|
if (initialized)
|
|
free_root(&m_warn_root,MYF(0));
|
|
}
|
|
|
|
Warning_info::~Warning_info()
|
|
{
|
|
free_memory();
|
|
}
|
|
|
|
|
|
bool Warning_info::has_sql_condition(const char *message_str, size_t message_length) const
|
|
{
|
|
Diagnostics_area::Sql_condition_iterator it(m_warn_list);
|
|
const Sql_condition *err;
|
|
|
|
while ((err= it++))
|
|
{
|
|
if (strncmp(message_str, err->get_message_text(), message_length) == 0)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool Warning_info::has_sql_condition(uint sql_errno) const
|
|
{
|
|
Diagnostics_area::Sql_condition_iterator it(m_warn_list);
|
|
const Sql_condition *err;
|
|
|
|
while ((err = it++))
|
|
{
|
|
if (err->get_sql_errno() == sql_errno)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void Warning_info::clear(ulonglong new_id)
|
|
{
|
|
id(new_id);
|
|
m_warn_list.empty();
|
|
m_marked_sql_conditions.empty();
|
|
free_memory();
|
|
memset(m_warn_count, 0, sizeof(m_warn_count));
|
|
m_current_statement_warn_count= 0;
|
|
m_current_row_for_warning= 1; /* Start counting from the first row */
|
|
clear_error_condition();
|
|
}
|
|
|
|
void Warning_info::append_warning_info(THD *thd, const Warning_info *source)
|
|
{
|
|
const Sql_condition *err;
|
|
Diagnostics_area::Sql_condition_iterator it(source->m_warn_list);
|
|
const Sql_condition *src_error_condition = source->get_error_condition();
|
|
|
|
while ((err= it++))
|
|
{
|
|
// Do not use ::push_warning() to avoid invocation of THD-internal-handlers.
|
|
Sql_condition *new_error= Warning_info::push_warning(thd, err);
|
|
|
|
if (src_error_condition && src_error_condition == err)
|
|
set_error_condition(new_error);
|
|
|
|
if (source->is_marked_for_removal(err))
|
|
mark_condition_for_removal(new_error);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
Copy Sql_conditions that are not WARN_LEVEL_ERROR from the source
|
|
Warning_info to the current Warning_info.
|
|
|
|
@param thd Thread context.
|
|
@param sp_wi Stored-program Warning_info
|
|
@param thd Thread context.
|
|
@param src_wi Warning_info to copy from.
|
|
*/
|
|
void Diagnostics_area::copy_non_errors_from_wi(THD *thd,
|
|
const Warning_info *src_wi)
|
|
{
|
|
Sql_condition_iterator it(src_wi->m_warn_list);
|
|
const Sql_condition *cond;
|
|
Warning_info *wi= get_warning_info();
|
|
|
|
while ((cond= it++))
|
|
{
|
|
if (cond->get_level() == Sql_condition::WARN_LEVEL_ERROR)
|
|
continue;
|
|
|
|
Sql_condition *new_condition= wi->push_warning(thd, cond);
|
|
|
|
if (src_wi->is_marked_for_removal(cond))
|
|
wi->mark_condition_for_removal(new_condition);
|
|
}
|
|
}
|
|
|
|
|
|
void Warning_info::mark_sql_conditions_for_removal()
|
|
{
|
|
Sql_condition_list::Iterator it(m_warn_list);
|
|
Sql_condition *cond;
|
|
|
|
while ((cond= it++))
|
|
mark_condition_for_removal(cond);
|
|
}
|
|
|
|
|
|
void Warning_info::remove_marked_sql_conditions()
|
|
{
|
|
List_iterator_fast<Sql_condition> it(m_marked_sql_conditions);
|
|
Sql_condition *cond;
|
|
|
|
while ((cond= it++))
|
|
{
|
|
m_warn_list.remove(cond);
|
|
m_warn_count[cond->get_level()]--;
|
|
m_current_statement_warn_count--;
|
|
if (cond == m_error_condition)
|
|
m_error_condition= NULL;
|
|
}
|
|
|
|
m_marked_sql_conditions.empty();
|
|
}
|
|
|
|
|
|
bool Warning_info::is_marked_for_removal(const Sql_condition *cond) const
|
|
{
|
|
List_iterator_fast<Sql_condition> it(
|
|
const_cast<List<Sql_condition>&> (m_marked_sql_conditions));
|
|
Sql_condition *c;
|
|
|
|
while ((c= it++))
|
|
{
|
|
if (c == cond)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
void Warning_info::reserve_space(THD *thd, uint count)
|
|
{
|
|
while (m_warn_list.elements() &&
|
|
(m_warn_list.elements() + count) > thd->variables.max_error_count)
|
|
m_warn_list.remove(m_warn_list.front());
|
|
}
|
|
|
|
Sql_condition *Warning_info::push_warning(THD *thd,
|
|
const Sql_condition_identity *value,
|
|
const char *msg)
|
|
{
|
|
Sql_condition *cond= NULL;
|
|
|
|
if (! m_read_only)
|
|
{
|
|
if (m_allow_unlimited_warnings ||
|
|
m_warn_list.elements() < thd->variables.max_error_count)
|
|
{
|
|
cond= new (& m_warn_root) Sql_condition(& m_warn_root, *value, msg);
|
|
if (cond)
|
|
m_warn_list.push_back(cond);
|
|
}
|
|
m_warn_count[(uint) value->get_level()]++;
|
|
}
|
|
|
|
m_current_statement_warn_count++;
|
|
return cond;
|
|
}
|
|
|
|
|
|
Sql_condition *Warning_info::push_warning(THD *thd,
|
|
const Sql_condition *sql_condition)
|
|
{
|
|
Sql_condition *new_condition= push_warning(thd, sql_condition,
|
|
sql_condition->get_message_text());
|
|
|
|
if (new_condition)
|
|
new_condition->copy_opt_attributes(sql_condition);
|
|
|
|
return new_condition;
|
|
}
|
|
|
|
/*
|
|
Push the warning to error list if there is still room in the list
|
|
|
|
SYNOPSIS
|
|
push_warning()
|
|
thd Thread handle
|
|
level Severity of warning (note, warning)
|
|
code Error number
|
|
msg Clear error message
|
|
*/
|
|
|
|
void push_warning(THD *thd, Sql_condition::enum_warning_level level,
|
|
uint code, const char *msg)
|
|
{
|
|
DBUG_ENTER("push_warning");
|
|
DBUG_PRINT("enter", ("code: %d, msg: %s", code, msg));
|
|
|
|
/*
|
|
Calling push_warning/push_warning_printf with a level of
|
|
WARN_LEVEL_ERROR *is* a bug. Either use my_printf_error(),
|
|
my_error(), or WARN_LEVEL_WARN.
|
|
*/
|
|
DBUG_ASSERT(level != Sql_condition::WARN_LEVEL_ERROR);
|
|
|
|
if (level == Sql_condition::WARN_LEVEL_ERROR)
|
|
level= Sql_condition::WARN_LEVEL_WARN;
|
|
|
|
(void) thd->raise_condition(code, NULL, level, msg);
|
|
|
|
/* Make sure we also count warnings pushed after calling set_ok_status(). */
|
|
thd->get_stmt_da()->increment_warning();
|
|
|
|
DBUG_VOID_RETURN;
|
|
}
|
|
|
|
|
|
/*
|
|
Push the warning to error list if there is still room in the list
|
|
|
|
SYNOPSIS
|
|
push_warning_printf()
|
|
thd Thread handle
|
|
level Severity of warning (note, warning)
|
|
code Error number
|
|
msg Clear error message
|
|
*/
|
|
|
|
void push_warning_printf(THD *thd, Sql_condition::enum_warning_level level,
|
|
uint code, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
char warning[MYSQL_ERRMSG_SIZE];
|
|
DBUG_ENTER("push_warning_printf");
|
|
DBUG_PRINT("enter",("warning: %u", code));
|
|
|
|
DBUG_ASSERT(code != 0);
|
|
DBUG_ASSERT(format != NULL);
|
|
|
|
va_start(args,format);
|
|
my_vsnprintf_ex(&my_charset_utf8mb3_general_ci, warning,
|
|
sizeof(warning), format, args);
|
|
va_end(args);
|
|
push_warning(thd, level, code, warning);
|
|
DBUG_VOID_RETURN;
|
|
}
|
|
|
|
|
|
/*
|
|
Send all notes, errors or warnings to the client in a result set
|
|
|
|
SYNOPSIS
|
|
mysqld_show_warnings()
|
|
thd Thread handler
|
|
levels_to_show Bitmap for which levels to show
|
|
|
|
DESCRIPTION
|
|
Takes into account the current LIMIT
|
|
|
|
RETURN VALUES
|
|
FALSE ok
|
|
TRUE Error sending data to client
|
|
*/
|
|
|
|
const LEX_CSTRING warning_level_names[]=
|
|
{
|
|
{ STRING_WITH_LEN("Note") },
|
|
{ STRING_WITH_LEN("Warning") },
|
|
{ STRING_WITH_LEN("Error") },
|
|
{ STRING_WITH_LEN("?") }
|
|
};
|
|
|
|
bool mysqld_show_warnings(THD *thd, ulong levels_to_show)
|
|
{
|
|
List<Item> field_list;
|
|
MEM_ROOT *mem_root= thd->mem_root;
|
|
const Sql_condition *err;
|
|
SELECT_LEX *sel= thd->lex->first_select_lex();
|
|
SELECT_LEX_UNIT *unit= &thd->lex->unit;
|
|
ha_rows idx;
|
|
Protocol *protocol=thd->protocol;
|
|
DBUG_ENTER("mysqld_show_warnings");
|
|
|
|
DBUG_ASSERT(thd->get_stmt_da()->is_warning_info_read_only());
|
|
|
|
field_list.push_back(new (mem_root)
|
|
Item_empty_string(thd, "Level", 7),
|
|
mem_root);
|
|
field_list.push_back(new (mem_root)
|
|
Item_return_int(thd, "Code", 4, MYSQL_TYPE_LONG),
|
|
mem_root);
|
|
field_list.push_back(new (mem_root)
|
|
Item_empty_string(thd, "Message", MYSQL_ERRMSG_SIZE),
|
|
mem_root);
|
|
|
|
if (protocol->send_result_set_metadata(&field_list,
|
|
Protocol::SEND_NUM_ROWS |
|
|
Protocol::SEND_EOF))
|
|
DBUG_RETURN(TRUE);
|
|
|
|
unit->set_limit(sel);
|
|
|
|
Diagnostics_area::Sql_condition_iterator it=
|
|
thd->get_stmt_da()->sql_conditions();
|
|
for (idx= 0; (err= it++) ; idx++)
|
|
{
|
|
/* Skip levels that the user is not interested in */
|
|
if (!(levels_to_show & ((ulong) 1 << err->get_level())))
|
|
continue;
|
|
if (unit->lim.check_offset(idx))
|
|
continue; // using limit offset,count
|
|
if (idx >= unit->lim.get_select_limit())
|
|
break;
|
|
protocol->prepare_for_resend();
|
|
protocol->store(warning_level_names[err->get_level()].str,
|
|
warning_level_names[err->get_level()].length,
|
|
system_charset_info);
|
|
protocol->store((uint32) err->get_sql_errno());
|
|
protocol->store_warning(err->get_message_text(),
|
|
err->get_message_octet_length());
|
|
if (protocol->write())
|
|
DBUG_RETURN(TRUE);
|
|
}
|
|
my_eof(thd);
|
|
|
|
thd->get_stmt_da()->set_warning_info_read_only(FALSE);
|
|
|
|
DBUG_RETURN(FALSE);
|
|
}
|
|
|
|
|
|
/**
|
|
This replaces U+0000 to '\0000', so the result error message string:
|
|
- is a good null-terminated string
|
|
- presents the entire data
|
|
For example:
|
|
SELECT CAST(_latin1 0x610062 AS SIGNED);
|
|
returns a warning:
|
|
Truncated incorrect INTEGER value: 'a\0000b'
|
|
Notice, the 0x00 byte is replaced to a 5-byte long string '\0000',
|
|
while 'a' and 'b' are printed as is.
|
|
*/
|
|
extern "C" int my_wc_mb_utf8_null_terminated(CHARSET_INFO *cs,
|
|
my_wc_t wc, uchar *r, uchar *e)
|
|
{
|
|
return wc == '\0' ?
|
|
cs->wc_to_printable(wc, r, e) :
|
|
my_charset_utf8mb3_handler.wc_mb(cs, wc, r, e);
|
|
}
|
|
|
|
|
|
/**
|
|
Convert value for dispatch to error message(see WL#751).
|
|
|
|
@param to buffer for converted string
|
|
@param to_length size of the buffer
|
|
@param from string which should be converted
|
|
@param from_length string length
|
|
@param from_cs charset from convert
|
|
|
|
@retval
|
|
result string
|
|
*/
|
|
|
|
char *err_conv(char *buff, uint to_length, const char *from,
|
|
uint from_length, CHARSET_INFO *from_cs)
|
|
{
|
|
char *to= buff;
|
|
const char *from_start= from;
|
|
size_t res;
|
|
|
|
DBUG_ASSERT(to_length > 0);
|
|
to_length--;
|
|
if (from_cs == &my_charset_bin)
|
|
{
|
|
uchar char_code;
|
|
res= 0;
|
|
while (1)
|
|
{
|
|
if ((uint)(from - from_start) >= from_length ||
|
|
res >= to_length)
|
|
{
|
|
*to= 0;
|
|
break;
|
|
}
|
|
|
|
char_code= ((uchar) *from);
|
|
if (char_code >= 0x20 && char_code <= 0x7E)
|
|
{
|
|
*to++= char_code;
|
|
from++;
|
|
res++;
|
|
}
|
|
else
|
|
{
|
|
if (res + 4 >= to_length)
|
|
{
|
|
*to= 0;
|
|
break;
|
|
}
|
|
res+= my_snprintf(to, 5, "\\x%02X", (uint) char_code);
|
|
to+=4;
|
|
from++;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
uint errors;
|
|
res= my_convert_using_func(to, to_length, system_charset_info,
|
|
my_wc_mb_utf8_null_terminated,
|
|
from, from_length, from_cs,
|
|
from_cs->cset->mb_wc,
|
|
&errors);
|
|
to[res]= 0;
|
|
}
|
|
return buff;
|
|
}
|
|
|
|
|
|
/**
|
|
Convert string for dispatch to client(see WL#751).
|
|
|
|
@param to buffer to convert
|
|
@param to_length buffer length
|
|
@param to_cs chraset to convert
|
|
@param from string from convert
|
|
@param from_length string length
|
|
@param from_cs charset from convert
|
|
@param errors count of errors during convertion
|
|
|
|
@retval
|
|
length of converted string
|
|
*/
|
|
|
|
size_t convert_error_message(char *to, size_t to_length, CHARSET_INFO *to_cs,
|
|
const char *from, size_t from_length,
|
|
CHARSET_INFO *from_cs, uint *errors)
|
|
{
|
|
DBUG_ASSERT(to_length > 0);
|
|
/* Make room for the null terminator. */
|
|
to_length--;
|
|
|
|
if (!to_cs || to_cs == &my_charset_bin)
|
|
to_cs= system_charset_info;
|
|
uint32 cnv_length= my_convert_using_func(to, to_length,
|
|
to_cs,
|
|
to_cs->cset->wc_to_printable,
|
|
from, from_length,
|
|
from_cs, from_cs->cset->mb_wc,
|
|
errors);
|
|
DBUG_ASSERT(to_length >= cnv_length);
|
|
to[cnv_length]= '\0';
|
|
return cnv_length;
|
|
}
|
|
|
|
|
|
/**
|
|
Sanity check for SQLSTATEs. The function does not check if it's really an
|
|
existing SQL-state (there are just too many), it just checks string length and
|
|
looks for bad characters.
|
|
|
|
@param sqlstate the condition SQLSTATE.
|
|
|
|
@retval true if it's ok.
|
|
@retval false if it's bad.
|
|
*/
|
|
|
|
bool is_sqlstate_valid(const LEX_CSTRING *sqlstate)
|
|
{
|
|
if (sqlstate->length != 5)
|
|
return false;
|
|
|
|
for (int i= 0 ; i < 5 ; ++i)
|
|
{
|
|
char c = sqlstate->str[i];
|
|
|
|
if ((c < '0' || '9' < c) &&
|
|
(c < 'A' || 'Z' < c))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
void convert_error_to_warning(THD *thd)
|
|
{
|
|
DBUG_ASSERT(thd->is_error());
|
|
push_warning(thd, Sql_condition::WARN_LEVEL_WARN,
|
|
thd->get_stmt_da()->sql_errno(),
|
|
thd->get_stmt_da()->message());
|
|
thd->clear_error();
|
|
}
|