guoxin
/
test-example-projects
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
用于EagleEye3.0 规则集漏报和误报测试的示例项目，项目收集于github和gitee
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2 Commits
1 Branch
0 Tags
722 MiB
Tag: Branch: Tree: 6f41ffec2a
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '6f41ffec2a'
${ noResults }
test-example-projects/c++_projects/280w-mysql-8.0.18/sql/sql_rewrite.cc

1457 lines
51 KiB
Raw Normal View History Unescape

first commit
5 months ago
/* Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/**
@brief In here, we rewrite queries.
For now, this is only used to obfuscate passwords before we log a
statement. If we ever get other clients for rewriting, we should
introduce a rewrite_flags to determine what kind of rewriting
(password obfuscation etc.) is desired by the client.
Some items in the server can self-print anyway, but many can't.
For instance, you'll see a re-synthesized SELECT in EXPLAIN EXTENDED,
but you won't get a resynthized query in EXPLAIN EXTENDED if you
were explaining an UPDATE.
The following does not claim to be able to re-synthesize every
statement, but attempts to ultimately be able to resynthesize
all statements that have need of rewriting.
Stored procedures may also rewrite their statements (to show the actual
values of their variables etc.). There is currently no scenario where
a statement can be eligible for both rewrites (see sp_instr.cc).
Special consideration will need to be taken if this is intenionally
changed at a later date. (There is an ASSERT() in place that will
hopefully catch unintentional changes.)
Finally, sp_* have code to print a stored program for use by
SHOW PROCEDURE CODE / SHOW FUNCTION CODE.
Thus, regular query parsing comes through here for logging.
So does prepared statement logging.
Stored instructions of the sp_instr_stmt type (which should
be the only ones to contain passwords, and therefore at this
time be eligible for rewriting) go through the regular parsing
facilities and therefore also come through here for logging
(other sp_instr_* types don't).
Finally, as rewriting goes, by default we replace the password with a literal
\<secret\>, with *no* quotation marks so the statement would fail if the
user were to cut & paste it without filling in the real password. This
default behavior is ON for rewriting to the textual logs. For instance :
General, slow query and audit log. Rewriters also have a provision to
replace the password with its hash where we have the latter. (so they
could be replayed, IDENTIFIED WITH \<plugin_name\> AS \<hash\>);
This hash is needed while writing the statements for binlog.
*/
#include "sql/sql_rewrite.h"
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <algorithm>
#include <memory>
#include <set>
#include <string>
#include "lex_string.h"
#include "m_ctype.h"
#include "m_string.h"
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_inttypes.h"
#include "prealloced_array.h"
#include "sql/auth/auth_acls.h"
#include "sql/auth/auth_common.h" // GRANT_ACL
#include "sql/handler.h"
#include "sql/log_event.h" // append_query_string
#include "sql/rpl_slave.h" // SLAVE_SQL, SLAVE_IO
#include "sql/set_var.h"
#include "sql/sql_admin.h" // Sql_cmd_clone
#include "sql/sql_class.h" // THD
#include "sql/sql_connect.h"
#include "sql/sql_lex.h" // LEX
#include "sql/sql_list.h"
#include "sql/sql_parse.h" // get_current_user
#include "sql/sql_servers.h"
#include "sql/sql_show.h" // append_identifier
#include "sql/table.h"
#include "sql_string.h" // String
#include "violite.h"
#ifndef DBUG_OFF
#define HASH_STRING_WITH_QUOTE \
"$5$BVZy9O>'a+2MH]_?$fpWyabcdiHjfCVqId/quykZzjaA7adpkcen/uiQrtmOK4p4"
#endif
namespace {
/**
Append a comma to given string if item wasn't the first to be added.
@param[in,out] str The string to (maybe) append to.
@param[in,out] comma If true, there are already items in the list.
Always true afterwards.
*/
void comma_maybe(String *str, bool *comma) {
if (*comma)
str->append(STRING_WITH_LEN(", "));
else
*comma = true;
}
/**
Append a key/value pair to a string, with an optional preceeding comma.
For numeric values.
@param[in,out] str The string to append to
@param comma Prepend a comma?
@param txt C-string, must end in a space
@param len strlen(txt)
@param val numeric value
@param cond only append if this evaluates to true
@retval false if any subsequent key/value pair would be the first
*/
bool append_int(String *str, bool comma, const char *txt, size_t len, long val,
int cond) {
if (cond) {
String numbuf(42);
comma_maybe(str, &comma);
str->append(txt, len);
str->append(STRING_WITH_LEN(" "));
numbuf.set((longlong)val, &my_charset_bin);
str->append(numbuf);
return true;
}
return comma;
}
/**
Append a key/value pair to a string if the value is non-NULL,
with an optional preceding comma.
@param[in,out] str The string to append to
@param comma Prepend a comma?
@param key C-string: the key, must be non-NULL
@param val C-string: the value
@retval false if any subsequent key/value pair would be the first
*/
bool append_str(String *str, bool comma, const char *key, const char *val) {
if (val) {
comma_maybe(str, &comma);
str->append(key);
str->append(STRING_WITH_LEN(" '"));
str->append(val);
str->append(STRING_WITH_LEN("'"));
return true;
}
return comma;
}
/**
Append the authorization id for the user
@param [in] thd The THD to find the SQL mode
@param [in] user LEX User to retrieve the plugin string
@param [in] comma Separator to be prefixed before adding user info
@param [in, out] str The string in which authID is suffixed
*/
void append_auth_id(const THD *thd, const LEX_USER *user, bool comma,
String *str) {
DBUG_ASSERT(thd && str);
String from_user(user->user.str, user->user.length, system_charset_info);
String from_host(user->host.str, user->host.length, system_charset_info);
if (comma) str->append(',');
append_query_string(thd, system_charset_info, &from_user, str);
str->append(STRING_WITH_LEN("@"));
append_query_string(thd, system_charset_info, &from_host, str);
}
/**
Used with List<>::sort for alphabetic sorting of LEX_USER records
using user,host as keys.
@param l1 A LEX_USER element
@param l2 A LEX_USER element
@return
@retval 1 if n1 &gt; n2
@retval 0 if n1 &lt;= n2
*/
int lex_user_comp(LEX_USER *l1, LEX_USER *l2) {
size_t length = std::min(l1->user.length, l2->user.length);
int key = memcmp(l1->user.str, l2->user.str, length);
if (key == 0 && l1->user.length == l2->user.length) {
length = std::min(l1->host.length, l2->host.length);
key = memcmp(l1->host.str, l2->host.str, length);
if (key == 0 && l1->host.length == l2->host.length) return 0;
}
if (key == 0)
return (l1->user.length > l2->user.length ? 1 : 0);
else
return (key > 0 ? 1 : 0);
}
/**
Util method which does the real rewrite of the SQL statment.
If Rewriter is available for the specified SQL command then
thd->rewritten_query is updated.
@param thd The THD to rewrite for.
@param type Purpose of rewriting the query
@param params Wrapper object of parameters in case needed by a SQL
rewriter.
@return
@retval true If the Query is re-written.
@retval false Otherwise
*/
bool rewrite_query(THD *thd, Consumer_type type, Rewrite_params *params) {
DBUG_TRACE;
std::unique_ptr<I_rewriter> rw = nullptr;
bool rewrite = false;
switch (thd->lex->sql_command) {
case SQLCOM_GRANT:
rw.reset(new Rewriter_grant(thd, type, params));
break;
case SQLCOM_SET_PASSWORD:
rw.reset(new Rewriter_set_password(thd, type, params));
break;
case SQLCOM_SET_OPTION:
rw.reset(new Rewriter_set(thd, type));
break;
case SQLCOM_CREATE_USER:
rw.reset(new Rewriter_create_user(thd, type));
break;
case SQLCOM_ALTER_USER:
rw.reset(new Rewriter_alter_user(thd, type));
break;
case SQLCOM_SHOW_CREATE_USER:
rw.reset(new Rewriter_show_create_user(thd, type, params));
break;
case SQLCOM_CHANGE_MASTER:
rw.reset(new Rewriter_change_master(thd, type));
break;
case SQLCOM_SLAVE_START:
rw.reset(new Rewriter_slave_start(thd, type));
break;
case SQLCOM_CREATE_SERVER:
rw.reset(new Rewriter_create_server(thd, type));
break;
case SQLCOM_ALTER_SERVER:
rw.reset(new Rewriter_alter_server(thd, type));
break;
/*
PREPARE stmt FROM <string> is rewritten so that <string> is
not logged. The statement in <string> will in turn be logged
by the prepare and the execute functions in sql_prepare.cc.
They do call rewrite so they can safely log the statement,
but when they call us, it'll be with sql_command set to reflect
the statement in question, not SQLCOM_PREPARE or SQLCOM_EXECUTE.
Therefore, there is no SQLCOM_EXECUTE case here, and all
SQLCOM_PREPARE does is remove <string>; the "other half",
i.e. printing what string we prepare from happens when the
prepare function calls the logger (and comes by here with
sql_command set to the command being prepared).
*/
case SQLCOM_PREPARE:
rw.reset(new Rewriter_prepare(thd, type));
break;
case SQLCOM_CLONE: {
auto clone_cmd = dynamic_cast<Sql_cmd_clone *>(thd->lex->m_sql_cmd);
clone_cmd->rewrite(thd);
break;
}
default: /* unhandled query types are legal. */
break;
}
if (rw) rewrite = rw->rewrite();
return rewrite;
}
} // anonymous namespace
/**
Provides the default interface to rewrite the SQL statements to
to obfuscate passwords.
It either sets the thd->rewritten_query with a rewritten query,
or clears it if no rewriting took place.
The query aimed to be rewritten in the usual log files
(i.e. General, slow query and audit log) uses default value of
type which is Consumer_type::LOG
@param thd The THD to rewrite for.
@param type Purpose of rewriting the query
Consumer_type::LOG
To rewrite the query either for general, slow query
and audit log.
Consumer_type::BINLOG
To rewrite the query for binlogs.
Consumer_type::CONSOLE
To rewrite the query for standard output.
@param params Wrapper object of parameters in case needed by a SQL
rewriter.
*/
void mysql_rewrite_query(THD *thd, Consumer_type type /*= Consumer_type::LOG */,
Rewrite_params *params /*= nullptr*/) {
DBUG_TRACE;
DBUG_ASSERT(thd);
String *rlb = &thd->rewritten_query;
rlb->mem_free();
if (thd->lex->contains_plaintext_password) {
rewrite_query(thd, type, params);
}
}
/**
Provides the default interface to rewrite the ACL query.
@param thd The THD to rewrite for.
@param type Purpose of rewriting the query
Consumer_type::LOG
To rewrite the query either for general, slow query
and audit log.
Consumer_type::BINLOG
To rewrite the query for binlogs.
Consumer_type::CONSOLE
To rewrite the query for standard output.
@param params Wrapper object of parameters in case needed by a SQL
rewriter.
@param do_ps_instrument flag to indicate if the query has to be instrumented
in the PSI. Default value is true.
*/
void mysql_rewrite_acl_query(THD *thd, Consumer_type type,
Rewrite_params *params /* = nullptr */,
bool do_ps_instrument /* = true */) {
if (rewrite_query(thd, type, params) && thd->rewritten_query.length() &&
do_ps_instrument) {
MYSQL_SET_STATEMENT_TEXT(thd->m_statement_psi,
thd->rewritten_query.c_ptr_safe(),
thd->rewritten_query.length());
}
}
I_rewriter::I_rewriter(THD *thd, Consumer_type type)
: m_thd(thd), m_consumer_type(type) {
DBUG_ASSERT(thd);
}
I_rewriter::~I_rewriter() {}
/**
Reset the previous consumer type.
@param [in] type new consumer type for which query is to be rewritten
*/
void I_rewriter::set_consumer_type(Consumer_type type) {
m_consumer_type = type;
}
/**
Return the current consumer type set in the object
@retval Consumer type set currently.
*/
Consumer_type I_rewriter::consumer_type() { return m_consumer_type; }
/* Constructor */
Rewriter_user::Rewriter_user(THD *thd, Consumer_type type)
: I_rewriter(thd, type) {}
/**
Appends the essential clauses for SHOW CREATE|CREATE|ALTER USER statements
in the thd->rewritten_query string.
@retval false Since it does the partial query rewrite.
Must be called through derived classes rewrite().
*/
bool Rewriter_user::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rewrite_users(lex, rlb);
rewrite_default_roles(lex, rlb);
rewrite_ssl_properties(lex, rlb);
rewrite_user_resources(lex, rlb);
rewrite_password_expired(lex, rlb);
rewrite_account_lock(lex, rlb);
rewrite_password_history(lex, rlb);
rewrite_password_reuse(lex, rlb);
rewrite_password_require_current(lex, rlb);
return false;
}
/**
Append the literal \<secret\> in place of password to the output string
@param [in, out] str The string in which literal value is suffixed
*/
void Rewriter_user::append_literal_secret(String *str) const {
str->append(STRING_WITH_LEN("<secret>"));
}
/**
Append the password hash to the output string
@param [in] user LEX_USER to fetch the auth string of it.
@param [in, out] str The string in which hash value is suffixed
*/
void Rewriter_user::append_auth_str(LEX_USER *user, String *str) const {
String from_auth(user->auth.str, user->auth.length, system_charset_info);
append_query_string(m_thd, system_charset_info, &from_auth, str);
}
/**
Append the SSL clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_ssl_properties(const LEX *lex, String *str) const {
if (lex->ssl_type != SSL_TYPE_NOT_SPECIFIED) {
str->append(STRING_WITH_LEN(" REQUIRE"));
switch (lex->ssl_type) {
case SSL_TYPE_SPECIFIED:
if (lex->x509_subject) {
str->append(STRING_WITH_LEN(" SUBJECT '"));
str->append(lex->x509_subject);
str->append(STRING_WITH_LEN("'"));
}
if (lex->x509_issuer) {
str->append(STRING_WITH_LEN(" ISSUER '"));
str->append(lex->x509_issuer);
str->append(STRING_WITH_LEN("'"));
}
if (lex->ssl_cipher) {
str->append(STRING_WITH_LEN(" CIPHER '"));
str->append(lex->ssl_cipher);
str->append(STRING_WITH_LEN("'"));
}
break;
case SSL_TYPE_X509:
str->append(STRING_WITH_LEN(" X509"));
break;
case SSL_TYPE_ANY:
str->append(STRING_WITH_LEN(" SSL"));
break;
case SSL_TYPE_NONE:
str->append(STRING_WITH_LEN(" NONE"));
break;
default:
DBUG_ASSERT(false);
break;
}
}
}
/**
Append the user resource clauses for users
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_user_resources(const LEX *lex, String *str) const {
if (lex->mqh.specified_limits) {
str->append(" WITH");
append_int(str, false, STRING_WITH_LEN(" MAX_QUERIES_PER_HOUR"),
lex->mqh.questions,
lex->mqh.specified_limits & USER_RESOURCES::QUERIES_PER_HOUR);
append_int(str, false, STRING_WITH_LEN(" MAX_UPDATES_PER_HOUR"),
lex->mqh.updates,
lex->mqh.specified_limits & USER_RESOURCES::UPDATES_PER_HOUR);
append_int(
str, false, STRING_WITH_LEN(" MAX_CONNECTIONS_PER_HOUR"),
lex->mqh.conn_per_hour,
lex->mqh.specified_limits & USER_RESOURCES::CONNECTIONS_PER_HOUR);
append_int(str, false, STRING_WITH_LEN(" MAX_USER_CONNECTIONS"),
lex->mqh.user_conn,
lex->mqh.specified_limits & USER_RESOURCES::USER_CONNECTIONS);
}
}
/**
Append the ACCOUNT LOCK clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_account_lock(const LEX *lex, String *str) const {
if (lex->alter_password.update_account_locked_column) {
if (lex->alter_password.account_locked) {
str->append(STRING_WITH_LEN(" ACCOUNT LOCK"));
} else {
str->append(STRING_WITH_LEN(" ACCOUNT UNLOCK"));
}
}
}
/**
Append the PASSWORD EXPIRE clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_password_expired(const LEX *lex,
String *str) const {
if (lex->alter_password.update_password_expired_fields) {
if (lex->alter_password.update_password_expired_column) {
str->append(STRING_WITH_LEN(" PASSWORD EXPIRE"));
} else if (lex->alter_password.expire_after_days) {
append_int(str, false, STRING_WITH_LEN(" PASSWORD EXPIRE INTERVAL"),
lex->alter_password.expire_after_days, true);
str->append(STRING_WITH_LEN(" DAY"));
} else if (lex->alter_password.use_default_password_lifetime) {
str->append(STRING_WITH_LEN(" PASSWORD EXPIRE DEFAULT"));
} else {
str->append(STRING_WITH_LEN(" PASSWORD EXPIRE NEVER"));
}
}
}
/**
Append the PASSWORD REQUIRE CURRENT clause for users
@param [in] lex LEX struct to know if the clause was specified
@param [in, out] str The string in which the clause is suffixed
*/
void Rewriter_user::rewrite_password_require_current(LEX *lex,
String *str) const {
switch (lex->alter_password.update_password_require_current) {
case Lex_acl_attrib_udyn::YES:
str->append(STRING_WITH_LEN(" PASSWORD REQUIRE CURRENT"));
break;
case Lex_acl_attrib_udyn::DEFAULT:
str->append(STRING_WITH_LEN(" PASSWORD REQUIRE CURRENT DEFAULT"));
break;
case Lex_acl_attrib_udyn::NO:
str->append(STRING_WITH_LEN(" PASSWORD REQUIRE CURRENT OPTIONAL"));
break;
case Lex_acl_attrib_udyn::UNCHANGED:
// Do nothing
break;
default:
DBUG_ASSERT(false);
}
}
/**
Append the authentication plugin name for the user
@param [in] user LEX User to retrieve the plugin string
@param [in, out] str The string in which plugin info is suffixed
*/
void Rewriter_user::append_plugin_name(const LEX_USER *user,
String *str) const {
str->append(STRING_WITH_LEN(" WITH "));
if (user->plugin.length > 0) {
String from_plugin(user->plugin.str, user->plugin.length,
system_charset_info);
append_query_string(m_thd, system_charset_info, &from_plugin, str);
} else {
std::string def_plugin_name = get_default_autnetication_plugin_name();
String default_plugin(def_plugin_name.c_str(), def_plugin_name.length(),
system_charset_info);
append_query_string(m_thd, system_charset_info, &default_plugin, str);
}
}
/**
The default implementation is to append the PASSWORD HISTORY clause iff it
is specified. Though concrete classes may add their own implementation.
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_password_history(const LEX *lex,
String *str) const {
if (lex->alter_password.use_default_password_history) {
str->append(STRING_WITH_LEN(" PASSWORD HISTORY DEFAULT"));
} else {
append_int(str, false, STRING_WITH_LEN(" PASSWORD HISTORY"),
lex->alter_password.password_history_length, true);
}
}
/**
The default implementation is to append the PASSWORD REUSE clause iff it is
specified. Though concrete classes may add their own implementation.
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_password_reuse(const LEX *lex, String *str) const {
if (lex->alter_password.use_default_password_reuse_interval) {
str->append(STRING_WITH_LEN(" PASSWORD REUSE INTERVAL DEFAULT"));
} else {
append_int(str, false, STRING_WITH_LEN(" PASSWORD REUSE INTERVAL"),
lex->alter_password.password_reuse_interval, true);
str->append(STRING_WITH_LEN(" DAY"));
}
}
/**
Fetch the users from user_list in LEX struct and append them to the String.
@param [in] lex
@param [in, out] str
*/
void Rewriter_user::rewrite_users(LEX *lex, String *str) const {
bool comma = false;
LEX_USER *user_name, *tmp_user_name;
List_iterator<LEX_USER> user_list(lex->users_list);
while ((tmp_user_name = user_list++)) {
if ((user_name = get_current_user(m_thd, tmp_user_name))) {
append_user_auth_info(user_name, comma, str);
comma = true;
}
}
}
/**
Append the DEFAULT ROLE clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_user::rewrite_default_roles(const LEX *lex, String *str) const {
bool comma = false;
if (lex->default_roles && lex->default_roles->elements > 0) {
str->append(" DEFAULT ROLE ");
lex->default_roles->sort(&lex_user_comp);
List_iterator<LEX_USER> role_it(*(lex->default_roles));
LEX_USER *role;
while ((role = role_it++)) {
if (comma) str->append(',');
str->append(create_authid_str_from(role).c_str());
comma = true;
}
}
}
Rewriter_create_user::Rewriter_create_user(THD *thd, Consumer_type type)
: Rewriter_user(thd, type) {}
/**
Rewrite the query for the CREATE USER statement.
@retval true the query is rewritten
*/
bool Rewriter_create_user::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
rlb->append("CREATE USER ");
if (lex->create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
rlb->append("IF NOT EXISTS ");
parent::rewrite();
return true;
}
/**
Append the authID, plugin and auth str of the user to output string :
- If the corresponding clause is specified.
- Always add the plugin info for the target type BINLOG
- Add the literal \<secret\> in place of plain text password
for the target type LOG
@param [in] user Lex user to fetch the info
@param [in] comma separator to be prefixed while appending user info
@param [in, out] str String to which user auth info is suffixed.
*/
void Rewriter_create_user::append_user_auth_info(LEX_USER *user, bool comma,
String *str) const {
append_auth_id(m_thd, user, comma, str);
if (user->uses_identified_by_clause || user->uses_identified_with_clause ||
user->uses_authentication_string_clause ||
m_consumer_type == Consumer_type::BINLOG) {
str->append(STRING_WITH_LEN(" IDENTIFIED"));
if (user->uses_identified_with_clause ||
m_consumer_type == Consumer_type::BINLOG)
append_plugin_name(user, str);
if (user->uses_identified_by_clause &&
m_consumer_type == Consumer_type::TEXTLOG) {
str->append(STRING_WITH_LEN(" BY "));
append_literal_secret(str);
} else if (user->auth.length > 0) {
str->append(STRING_WITH_LEN(" AS "));
append_auth_str(user, str);
}
}
}
/**
Append the PASSWORD HISTORY clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_create_user::rewrite_password_history(const LEX *lex,
String *str) const {
if (lex->alter_password.update_password_history) {
parent::rewrite_password_history(lex, str);
}
}
/**
Append the PASSWORD REUSE clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_create_user::rewrite_password_reuse(const LEX *lex,
String *str) const {
if (lex->alter_password.update_password_reuse_interval) {
parent::rewrite_password_reuse(lex, str);
}
}
Rewriter_alter_user::Rewriter_alter_user(THD *thd, Consumer_type type)
: Rewriter_user(thd, type) {}
/**
Rewrite the query for the ALTER USER statement.
@retval true the query is rewritten
*/
bool Rewriter_alter_user::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
rlb->append("ALTER USER ");
if (lex->drop_if_exists) rlb->append("IF EXISTS ");
parent::rewrite();
return true;
}
/**
Append the authID, plugin and auth str of the user to output string :
- If the corresponding clause is specified.
- Always add the plugin info for the target type BINLOG
- Add the literal \<secret\> in place of plain text password
for the target type LOG
@param [in] user Lex user to fetch the info
@param [in] comma separator to be prefixed while appending user info
@param [in, out] str String to which user auth info is suffixed.
*/
void Rewriter_alter_user::append_user_auth_info(LEX_USER *user, bool comma,
String *str) const {
append_auth_id(m_thd, user, comma, str);
if (user->uses_identified_by_clause || user->uses_identified_with_clause ||
user->uses_authentication_string_clause) {
str->append(STRING_WITH_LEN(" IDENTIFIED"));
if (user->uses_identified_with_clause ||
m_consumer_type == Consumer_type::BINLOG)
append_plugin_name(user, str);
if (user->uses_identified_by_clause &&
m_consumer_type == Consumer_type::TEXTLOG) {
str->append(STRING_WITH_LEN(" BY "));
append_literal_secret(str);
/* Add the literal value in place of current password in the textlogs. */
if (user->uses_replace_clause) {
str->append(STRING_WITH_LEN(" REPLACE <secret>"));
}
} else if (user->auth.length > 0) {
str->append(STRING_WITH_LEN(" AS "));
append_auth_str(user, str);
}
if (user->retain_current_password) {
str->append(STRING_WITH_LEN(" RETAIN CURRENT PASSWORD"));
}
}
if (user->discard_old_password) {
str->append(STRING_WITH_LEN(" DISCARD OLD PASSWORD"));
}
}
/**
Append the PASSWORD HISTORY clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_alter_user::rewrite_password_history(const LEX *lex,
String *str) const {
if (lex->alter_password.update_password_history) {
parent::rewrite_password_history(lex, str);
}
}
/**
Append the PASSWORD REUSE clause for users iff it is specified
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_alter_user::rewrite_password_reuse(const LEX *lex,
String *str) const {
if (lex->alter_password.update_password_reuse_interval) {
parent::rewrite_password_reuse(lex, str);
}
}
Rewriter_show_create_user::Rewriter_show_create_user(THD *thd,
Consumer_type type,
Rewrite_params *params)
: Rewriter_user(thd, type),
show_params_(dynamic_cast<Show_user_params *>(params)) {}
/**
Rewrite the query for the SHOW CREATE USER statement.
@retval true the query is rewritten
*/
bool Rewriter_show_create_user::rewrite() const {
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
rlb->append("CREATE USER ");
parent::rewrite();
return true;
}
/**
A special rewriter override to make SHOW CREATE USER convert the string
to hex if print_identified_with_as hex is on
@param [in] user LEX_USER to fetch the auth string of it.
@param [in, out] str The string in which hash value is suffixed
@sa Rewriter_user::append_auth_str
*/
void Rewriter_show_create_user::append_auth_str(LEX_USER *user,
String *str) const {
String from_auth(user->auth.str, user->auth.length, system_charset_info);
if (show_params_ && show_params_->print_identified_with_as_hex_ &&
user->auth.length) {
for (const char *c = user->auth.str;
static_cast<size_t>(c - user->auth.str) < user->auth.length; c++) {
if (!my_isgraph(system_charset_info, *c)) {
from_auth.alloc(user->auth.length * 2 + 3);
str_to_hex(from_auth.c_ptr_quick(), user->auth.str, user->auth.length);
from_auth.length(user->auth.length * 2 + 2);
str->append(from_auth);
return;
}
}
}
append_query_string(m_thd, system_charset_info, &from_auth, str);
}
/**
Append the PASSWORD HISTORY clause for users
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_show_create_user::rewrite_password_history(const LEX *lex,
String *str) const {
parent::rewrite_password_history(lex, str);
}
/**
Append the PASSWORD REUSE clause for users
@param [in] lex LEX struct to check if clause is specified
@param [in, out] str The string in which clause is suffixed
*/
void Rewriter_show_create_user::rewrite_password_reuse(const LEX *lex,
String *str) const {
parent::rewrite_password_reuse(lex, str);
}
/**
Append the authID, plugin name and suth str user to output string
@param [in] user Lex user to fetch the info
@param [in] comma separator to be prefixed while appending user info
@param [in, out] str String to which user auth info is suffixed.
*/
void Rewriter_show_create_user::append_user_auth_info(LEX_USER *user,
bool comma,
String *str) const {
append_auth_id(m_thd, user, comma, str);
DBUG_ASSERT(m_thd->lex->contains_plaintext_password == false);
str->append(STRING_WITH_LEN(" IDENTIFIED"));
append_plugin_name(user, str);
if (user->auth.length > 0) {
str->append(STRING_WITH_LEN(" AS "));
if (show_params_ && show_params_->hide_password_hash) {
append_literal_secret(str);
} else {
append_auth_str(user, str);
}
}
}
Rewriter_set::Rewriter_set(THD *thd, Consumer_type type)
: I_rewriter(thd, type) {}
/**
Rewrite the query for the SET statement.
@return
@retval true the query is rewritten
@retval false otherwise
*/
bool Rewriter_set::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
List_iterator_fast<set_var_base> it(lex->var_list);
set_var_base *var;
bool comma = false;
rlb->append(STRING_WITH_LEN("SET "));
while ((var = it++)) {
comma_maybe(rlb, &comma);
var->print(m_thd, rlb);
}
return true;
}
Rewriter_set_password::Rewriter_set_password(THD *thd, Consumer_type type,
Rewrite_params *params)
: Rewriter_set(thd, type) {
User_params *param = dynamic_cast<User_params *>(params);
if (param) m_users = param->users;
}
/**
Rewrite the query for the SET PASSWORD statement.
@return
@retval true the query is rewritten
@retval false otherwise
*/
bool Rewriter_set_password::rewrite() const {
bool ret_val = false;
if (m_consumer_type == Consumer_type::BINLOG) {
if (m_users == nullptr || m_users->size() == 0) return ret_val;
/* SET PASSWORD should always have one user */
DBUG_ASSERT(m_users->size() == 1);
bool set_temp_string = false;
/*
Setting this flag will generate the password hash string which
contains a single quote.
*/
DBUG_EXECUTE_IF("force_hash_string_with_quote", set_temp_string = true;);
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
LEX_USER *user = *(m_users->begin());
String current_user(user->user.str, user->user.length, system_charset_info);
String current_host(user->host.str, user->host.length, system_charset_info);
String auth_str;
if (set_temp_string) {
#ifndef DBUG_OFF
auth_str = String(HASH_STRING_WITH_QUOTE, strlen(HASH_STRING_WITH_QUOTE),
system_charset_info);
#endif
} else {
auth_str = String(user->auth.str, user->auth.length, system_charset_info);
}
/*
Construct :
ALTER USER '<user>'@'<host>' IDENTIFIED WITH '<plugin>' AS '<HASH>'
*/
rlb->append(STRING_WITH_LEN("ALTER USER "));
append_query_string(m_thd, system_charset_info, &current_user, rlb);
rlb->append(STRING_WITH_LEN("@"));
append_query_string(m_thd, system_charset_info, &current_host, rlb);
rlb->append(STRING_WITH_LEN(" IDENTIFIED WITH '"));
rlb->append(user->plugin.str);
rlb->append(STRING_WITH_LEN("' AS "));
append_query_string(m_thd, system_charset_info, &auth_str, rlb);
if (user->retain_current_password)
rlb->append(STRING_WITH_LEN(" RETAIN CURRENT PASSWORD"));
ret_val = true;
} else {
ret_val = parent::rewrite();
}
return ret_val;
}
Rewriter_grant::Rewriter_grant(THD *thd, Consumer_type type,
Rewrite_params *params)
: I_rewriter(thd, type) {
grant_params = dynamic_cast<Grant_params *>(params);
}
/**
Rewrite the query for the GRANT statement.
@retval true the query is rewritten
*/
bool Rewriter_grant::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
TABLE_LIST *first_table = lex->select_lex->table_list.first;
bool comma = false, comma_inner;
bool proxy_grant = lex->type == TYPE_ENUM_PROXY;
String cols(1024);
int c;
auto append_authids = [&rlb](THD *thd, List_iterator<LEX_USER> &list) {
LEX_USER *user_name, *tmp_user_name;
bool comma = false;
while ((tmp_user_name = list++)) {
if ((user_name = get_current_user(thd, tmp_user_name))) {
append_auth_id(thd, user_name, comma, rlb);
comma = true;
}
}
};
rlb->append(STRING_WITH_LEN("GRANT "));
if (proxy_grant)
rlb->append(STRING_WITH_LEN("PROXY"));
else if (lex->all_privileges)
rlb->append(STRING_WITH_LEN("ALL PRIVILEGES"));
else if (lex->grant_privilege)
rlb->append(STRING_WITH_LEN("GRANT OPTION"));
else {
ulong priv;
for (c = 0, priv = SELECT_ACL; priv <= GLOBAL_ACLS; c++, priv <<= 1) {
if (priv == GRANT_ACL) continue;
comma_inner = false;
if (lex->columns.elements) // show columns, if any
{
class LEX_COLUMN *column;
List_iterator<LEX_COLUMN> column_iter(lex->columns);
cols.length(0);
cols.append(STRING_WITH_LEN(" ("));
/*
If the statement was GRANT SELECT(f2), INSERT(f3), UPDATE(f1,f3, f2),
our list cols will contain the order f2, f3, f1, and thus that's
the order we'll recreate the privilege: UPDATE (f2, f3, f1)
*/
while ((column = column_iter++)) {
if (column->rights & priv) {
comma_maybe(&cols, &comma_inner);
append_identifier(m_thd, &cols, column->column.ptr(),
column->column.length());
}
}
cols.append(STRING_WITH_LEN(")"));
}
if (comma_inner || (lex->grant & priv)) // show privilege name
{
comma_maybe(rlb, &comma);
rlb->append(global_acls_vector[c].c_str(),
global_acls_vector[c].length());
if (!(lex->grant & priv)) // general outranks specific
rlb->append(cols);
}
}
/* List extended global privilege IDs */
if (!first_table && !lex->current_select()->db) {
List_iterator<LEX_CSTRING> it(lex->dynamic_privileges);
LEX_CSTRING *priv;
while ((priv = it++)) {
comma_maybe(rlb, &comma);
rlb->append(priv->str, priv->length);
}
}
if (!comma) // no privs, default to USAGE
rlb->append(STRING_WITH_LEN("USAGE"));
}
rlb->append(STRING_WITH_LEN(" ON "));
switch (lex->type) {
case TYPE_ENUM_PROCEDURE:
rlb->append(STRING_WITH_LEN("PROCEDURE "));
break;
case TYPE_ENUM_FUNCTION:
rlb->append(STRING_WITH_LEN("FUNCTION "));
break;
default:
break;
}
LEX_USER *user_name, *tmp_user_name;
List_iterator<LEX_USER> user_list(lex->users_list);
comma = false;
if (proxy_grant) {
tmp_user_name = user_list++;
user_name = get_current_user(m_thd, tmp_user_name);
if (user_name) append_auth_id(m_thd, user_name, comma, rlb);
} else if (first_table) {
if (first_table->is_view()) {
append_identifier(m_thd, rlb, first_table->view_db.str,
first_table->view_db.length);
rlb->append(STRING_WITH_LEN("."));
append_identifier(m_thd, rlb, first_table->view_name.str,
first_table->view_name.length);
} else {
append_identifier(m_thd, rlb, first_table->db, strlen(first_table->db));
rlb->append(STRING_WITH_LEN("."));
append_identifier(m_thd, rlb, first_table->table_name,
strlen(first_table->table_name));
}
} else {
if (lex->current_select()->db)
append_identifier(m_thd, rlb, lex->current_select()->db,
strlen(lex->current_select()->db));
else
rlb->append("*");
rlb->append(STRING_WITH_LEN(".*"));
}
rlb->append(STRING_WITH_LEN(" TO "));
append_authids(m_thd, user_list);
if (lex->grant & GRANT_ACL) {
rlb->append(STRING_WITH_LEN(" WITH GRANT OPTION"));
}
/*
AS ... clause is added in following cases
1. User has explicitly executed GRANT ... AS ...
In this case we write it as it.
2. --partial_revokes is ON and we are rewritting
GRANT for binary log.
*/
if (grant_params != nullptr) {
LEX_GRANT_AS *grant_as = grant_params->grant_as_info;
if (grant_params->grant_as_provided ||
(m_consumer_type == Consumer_type::BINLOG && grant_as &&
grant_as->grant_as_used)) {
if ((user_name = get_current_user(m_thd, grant_as->user))) {
rlb->append(STRING_WITH_LEN(" AS "));
append_auth_id(m_thd, user_name, false, rlb);
rlb->append(STRING_WITH_LEN(" WITH ROLE "));
switch (grant_as->role_type) {
case role_enum::ROLE_DEFAULT:
rlb->append(STRING_WITH_LEN("DEFAULT"));
break;
case role_enum::ROLE_ALL:
rlb->append(STRING_WITH_LEN("ALL"));
if (grant_as->role_list) {
rlb->append(STRING_WITH_LEN(" EXCEPT "));
List_iterator<LEX_USER> role_list(*grant_as->role_list);
append_authids(m_thd, role_list);
}
break;
case role_enum::ROLE_NAME: {
List_iterator<LEX_USER> role_list(*grant_as->role_list);
append_authids(m_thd, role_list);
} break;
case role_enum::ROLE_NONE:
rlb->append(STRING_WITH_LEN("NONE"));
break;
default:
DBUG_ASSERT(false);
rlb->append(STRING_WITH_LEN("NONE"));
break;
}
}
}
}
return true;
}
Rewriter_change_master::Rewriter_change_master(THD *thd, Consumer_type type)
: I_rewriter(thd, type) {}
/**
Rewrite the query for the CHANGE MASTER statement.
@return
@retval true the query is rewritten
@retval false otherwise
*/
bool Rewriter_change_master::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
rlb->append(STRING_WITH_LEN("CHANGE MASTER TO "));
bool comma = false;
comma = append_str(rlb, comma, "MASTER_BIND =", lex->mi.bind_addr);
comma = append_str(rlb, comma, "MASTER_HOST =", lex->mi.host);
comma = append_str(rlb, comma, "MASTER_USER =", lex->mi.user);
if (lex->mi.password) {
comma_maybe(rlb, &comma);
rlb->append(STRING_WITH_LEN("MASTER_PASSWORD = <secret>"));
}
comma = append_int(rlb, comma, STRING_WITH_LEN("MASTER_PORT ="), lex->mi.port,
lex->mi.port > 0);
// condition as per rpl_slave.cc
comma = append_int(rlb, comma, STRING_WITH_LEN("MASTER_CONNECT_RETRY ="),
lex->mi.connect_retry, lex->mi.connect_retry > 0);
comma = append_int(
rlb, comma, STRING_WITH_LEN("MASTER_RETRY_COUNT ="), lex->mi.retry_count,
lex->mi.retry_count_opt != LEX_MASTER_INFO::LEX_MI_UNCHANGED);
// MASTER_DELAY 0..MASTER_DELAY_MAX; -1 == unspecified
comma = append_int(rlb, comma, STRING_WITH_LEN("MASTER_DELAY ="),
lex->mi.sql_delay, lex->mi.sql_delay >= 0);
if (lex->mi.heartbeat_opt != LEX_MASTER_INFO::LEX_MI_UNCHANGED) {
comma_maybe(rlb, &comma);
rlb->append(STRING_WITH_LEN("MASTER_HEARTBEAT_PERIOD = "));
if (lex->mi.heartbeat_opt == LEX_MASTER_INFO::LEX_MI_DISABLE)
rlb->append(STRING_WITH_LEN("0"));
else {
char buf[64];
snprintf(buf, 64, "%f", lex->mi.heartbeat_period);
rlb->append(buf);
}
}
// log file (slave I/O thread)
comma = append_str(rlb, comma, "MASTER_LOG_FILE =", lex->mi.log_file_name);
// MASTER_LOG_POS is >= BIN_LOG_HEADER_SIZE; 0 == unspecified in stmt.
comma = append_int(rlb, comma, STRING_WITH_LEN("MASTER_LOG_POS ="),
lex->mi.pos, lex->mi.pos != 0);
comma = append_int(
rlb, comma, STRING_WITH_LEN("MASTER_AUTO_POSITION ="),
(lex->mi.auto_position == LEX_MASTER_INFO::LEX_MI_ENABLE) ? 1 : 0,
lex->mi.auto_position != LEX_MASTER_INFO::LEX_MI_UNCHANGED);
// log file (slave SQL thread)
comma = append_str(rlb, comma, "RELAY_LOG_FILE =", lex->mi.relay_log_name);
// RELAY_LOG_POS is >= BIN_LOG_HEADER_SIZE; 0 == unspecified in stmt.
comma = append_int(rlb, comma, STRING_WITH_LEN("RELAY_LOG_POS ="),
lex->mi.relay_log_pos, lex->mi.relay_log_pos != 0);
// SSL
comma = append_int(rlb, comma, STRING_WITH_LEN("MASTER_SSL ="),
lex->mi.ssl == LEX_MASTER_INFO::LEX_MI_ENABLE ? 1 : 0,
lex->mi.ssl != LEX_MASTER_INFO::LEX_MI_UNCHANGED);
comma = append_str(rlb, comma, "MASTER_SSL_CA =", lex->mi.ssl_ca);
comma = append_str(rlb, comma, "MASTER_SSL_CAPATH =", lex->mi.ssl_capath);
comma = append_str(rlb, comma, "MASTER_SSL_CERT =", lex->mi.ssl_cert);
comma = append_str(rlb, comma, "MASTER_SSL_CRL =", lex->mi.ssl_crl);
comma = append_str(rlb, comma, "MASTER_SSL_CRLPATH =", lex->mi.ssl_crlpath);
comma = append_str(rlb, comma, "MASTER_SSL_KEY =", lex->mi.ssl_key);
comma = append_str(rlb, comma, "MASTER_SSL_CIPHER =", lex->mi.ssl_cipher);
comma = append_int(
rlb, comma, STRING_WITH_LEN("MASTER_SSL_VERIFY_SERVER_CERT ="),
(lex->mi.ssl_verify_server_cert == LEX_MASTER_INFO::LEX_MI_ENABLE) ? 1
: 0,
lex->mi.ssl_verify_server_cert != LEX_MASTER_INFO::LEX_MI_UNCHANGED);
comma = append_str(rlb, comma, "MASTER_TLS_VERSION =", lex->mi.tls_version);
// Public key
comma = append_str(rlb, comma,
"MASTER_PUBLIC_KEY_PATH =", lex->mi.public_key_path);
comma = append_int(
rlb, comma, STRING_WITH_LEN("GET_MASTER_PUBLIC_KEY ="),
(lex->mi.get_public_key == LEX_MASTER_INFO::LEX_MI_ENABLE) ? 1 : 0,
lex->mi.get_public_key != LEX_MASTER_INFO::LEX_MI_UNCHANGED);
// IGNORE_SERVER_IDS
if (lex->mi.repl_ignore_server_ids_opt != LEX_MASTER_INFO::LEX_MI_UNCHANGED) {
bool comma_list = false;
comma_maybe(rlb, &comma);
rlb->append(STRING_WITH_LEN("IGNORE_SERVER_IDS = ( "));
for (size_t i = 0; i < lex->mi.repl_ignore_server_ids.size(); i++) {
ulong s_id = lex->mi.repl_ignore_server_ids[i];
comma_maybe(rlb, &comma_list);
rlb->append_ulonglong(s_id);
}
rlb->append(STRING_WITH_LEN(" )"));
}
if (lex->mi.compression_algorithm)
comma = append_str(rlb, comma, "MASTER_COMPRESSION_ALGORITHMS = ",
lex->mi.compression_algorithm);
comma = append_int(
rlb, comma, STRING_WITH_LEN("MASTER_ZSTD_COMPRESSION_LEVEL = "),
lex->mi.zstd_compression_level, lex->mi.zstd_compression_level != 0);
/* channel options -- no preceding comma here! */
if (lex->mi.for_channel)
append_str(rlb, false, " FOR CHANNEL", lex->mi.channel);
return true;
}
Rewriter_slave_start::Rewriter_slave_start(THD *thd, Consumer_type type)
: I_rewriter(thd, type) {}
/**
Rewrite the query for the SLAVE START statement.
@retval true the query is rewritten
*/
bool Rewriter_slave_start::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
rlb->append(STRING_WITH_LEN("START SLAVE"));
/* thread_types */
if (lex->slave_thd_opt & SLAVE_IO) rlb->append(STRING_WITH_LEN(" IO_THREAD"));
if (lex->slave_thd_opt & SLAVE_IO && lex->slave_thd_opt & SLAVE_SQL)
rlb->append(STRING_WITH_LEN(","));
if (lex->slave_thd_opt & SLAVE_SQL)
rlb->append(STRING_WITH_LEN(" SQL_THREAD"));
/* UNTIL options */
// GTID
if (lex->mi.gtid) {
rlb->append((lex->mi.gtid_until_condition ==
LEX_MASTER_INFO::UNTIL_SQL_BEFORE_GTIDS)
? " UNTIL SQL_BEFORE_GTIDS"
: " UNTIL SQL_AFTER_GTIDS");
append_str(rlb, false, " =", lex->mi.gtid);
}
// SQL_AFTER_MTS_GAPS
else if (lex->mi.until_after_gaps) {
rlb->append(STRING_WITH_LEN(" UNTIL SQL_AFTER_MTS_GAPS"));
}
// MASTER_LOG_FILE/POS
else if (lex->mi.log_file_name) {
append_str(rlb, false, " UNTIL MASTER_LOG_FILE =", lex->mi.log_file_name);
append_int(rlb, true, STRING_WITH_LEN("MASTER_LOG_POS ="), lex->mi.pos,
lex->mi.pos > 0);
}
// RELAY_LOG_FILE/POS
else if (lex->mi.relay_log_name) {
append_str(rlb, false, " UNTIL RELAY_LOG_FILE =", lex->mi.relay_log_name);
append_int(rlb, true, STRING_WITH_LEN("RELAY_LOG_POS ="),
lex->mi.relay_log_pos, lex->mi.relay_log_pos > 0);
}
/* connection options */
append_str(rlb, false, " USER =", lex->slave_connection.user);
if (lex->slave_connection.password)
rlb->append(STRING_WITH_LEN(" PASSWORD = <secret>"));
append_str(rlb, false, " DEFAULT_AUTH =", lex->slave_connection.plugin_auth);
append_str(rlb, false, " PLUGIN_DIR =", lex->slave_connection.plugin_dir);
/* channel options */
if (lex->mi.for_channel)
append_str(rlb, false, " FOR CHANNEL", lex->mi.channel);
return true;
}
Rewriter_server_option::Rewriter_server_option(THD *thd, Consumer_type type)
: I_rewriter(thd, type) {}
Rewriter_create_server::Rewriter_create_server(THD *thd, Consumer_type type)
: Rewriter_server_option(thd, type) {}
/**
Append the SERVER OPTIONS clause
@param [in] lex Lex structure
@param [in,out] str A String object to append the rewritten query in.
*/
void Rewriter_server_option::mysql_rewrite_server_options(const LEX *lex,
String *str) const {
str->append(STRING_WITH_LEN(" OPTIONS ( "));
str->append(STRING_WITH_LEN("PASSWORD <secret>"));
append_str(str, true, "USER", lex->server_options.get_username());
append_str(str, true, "HOST", lex->server_options.get_host());
append_str(str, true, "DATABASE", lex->server_options.get_db());
append_str(str, true, "OWNER", lex->server_options.get_owner());
append_str(str, true, "SOCKET", lex->server_options.get_socket());
append_int(str, true, STRING_WITH_LEN("PORT"), lex->server_options.get_port(),
lex->server_options.get_port() != Server_options::PORT_NOT_SET);
str->append(STRING_WITH_LEN(" )"));
}
/**
Rewrite the query for the CREATE SERVER statement.
@retval true the query is rewritten
@retval false otherwise
*/
bool Rewriter_create_server::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
if (!lex->server_options.get_password()) return false;
rlb->append(STRING_WITH_LEN("CREATE SERVER "));
rlb->append(lex->server_options.m_server_name.str
? lex->server_options.m_server_name.str
: "");
rlb->append(STRING_WITH_LEN(" FOREIGN DATA WRAPPER '"));
rlb->append(
lex->server_options.get_scheme() ? lex->server_options.get_scheme() : "");
rlb->append(STRING_WITH_LEN("'"));
parent::mysql_rewrite_server_options(lex, rlb);
return true;
}
Rewriter_alter_server::Rewriter_alter_server(THD *thd, Consumer_type type)
: Rewriter_server_option(thd, type) {}
/**
Rewrite the query for the ALTER SERVER statement.
@retval true the query is rewritten
@retval false otherwise
*/
bool Rewriter_alter_server::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
if (!lex->server_options.get_password()) return false;
rlb->append(STRING_WITH_LEN("ALTER SERVER "));
rlb->append(lex->server_options.m_server_name.str
? lex->server_options.m_server_name.str
: "");
parent::mysql_rewrite_server_options(lex, rlb);
return true;
}
Rewriter_prepare::Rewriter_prepare(THD *thd, Consumer_type type)
: I_rewriter(thd, type) {}
/**
Rewrite the query for the PREPARE statement.
@retval true the query is rewritten
@retval false otherwise
*/
bool Rewriter_prepare::rewrite() const {
LEX *lex = m_thd->lex;
String *rlb = &m_thd->rewritten_query;
rlb->mem_free();
if (lex->prepared_stmt_code_is_varref) return false;
rlb->append(STRING_WITH_LEN("PREPARE "));
rlb->append(lex->prepared_stmt_name.str, lex->prepared_stmt_name.length);
rlb->append(STRING_WITH_LEN(" FROM ..."));
return true;
}