Merge bk-internal:/home/bk/mysql-5.0-maint

into  quadxeon.mysql.com:/users/mtaylor/mysql-5.0-maint

extra/CMakeLists.txt

@@ -38,7 +38,7 @@ ADD_CUSTOM_TARGET(GenError
                   DEPENDS ${PROJECT_SOURCE_DIR}/include/mysqld_error.h)
 
 ADD_EXECUTABLE(my_print_defaults my_print_defaults.c)
-TARGET_LINK_LIBRARIES(my_print_defaults strings mysys dbug taocrypt odbc32 odbccp32 wsock32)
+TARGET_LINK_LIBRARIES(my_print_defaults strings mysys dbug taocrypt wsock32)
 
 ADD_EXECUTABLE(perror perror.c)
 TARGET_LINK_LIBRARIES(perror strings mysys dbug wsock32)

extra/yassl/README

-yaSSL Release notes, version 1.5.0 (11/09/06)
+*****************yaSSL Release notes, version 1.5.0 (1/10/07)
+
+    This release of yaSSL contains bug fixes, portability enhancements, and
+    support for GCC 4.1.1 and vs2005 sp1.
+
+
+
+    Since yaSSL now supports zlib, as does libcur, the libcurl build test can
+    fail if yaSSL is built with zlib support since the zlib library isn't 
+    passed.  You can do two things to fix this: 
+
+        1) build yaSSL w/o zlib --without-zlib
+        2) or add flags to curl configure LDFLAGS="-lm -lz"
+
+
+
+*****************yaSSL Release notes, version 1.5.0 (11/09/06)
 
     This release of yaSSL contains bug fixes, portability enhancements,
     and full TLS 1.1 support.  Use the functions:

extra/yassl/include/openssl/ssl.h

@@ -41,7 +41,7 @@
 #include "rsa.h"
 
 
-#define YASSL_VERSION "1.5.0"
+#define YASSL_VERSION "1.5.8"
 
 
 #if defined(__cplusplus)

extra/yassl/src/make.bat

 REM quick and dirty build file for testing different MSDEVs
-
-@echo off
-REM Copyright (C) 2006 MySQL AB
-REM 
-REM This program is free software; you can redistribute it and/or modify
-REM it under the terms of the GNU General Public License as published by
-REM the Free Software Foundation; version 2 of the License.
-REM 
-REM This program is distributed in the hope that it will be useful,
-REM but WITHOUT ANY WARRANTY; without even the implied warranty of
-REM MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-REM GNU General Public License for more details.
-REM 
-REM You should have received a copy of the GNU General Public License
-REM along with this program; if not, write to the Free Software
-REM Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-@echo on
-
 setlocal 
 
 set myFLAGS= /I../include /I../taocrypt/mySTL /I../taocrypt/include /W3 /c /ZI

extra/yassl/src/ssl.cpp

@@ -958,7 +958,7 @@ void ERR_print_errors_fp(FILE* /*fp*/)
 
 char* ERR_error_string(unsigned long errNumber, char* buffer)
 {
-  static char* msg = (char*) "Please supply a buffer for error string";
+    static char* msg = "Please supply a buffer for error string";
 
     if (buffer) {
         SetErrorString(YasslError(errNumber), buffer);

extra/yassl/src/yassl_error.cpp

@@ -150,6 +150,10 @@ void SetErrorString(YasslError error, char* buffer)
         strncpy(buffer, "the read operation would block", max);
         break;
 
+    case CERTFICATE_ERROR :
+        strncpy(buffer, "Unable to verify certificate", max);
+        break;
+
         // TaoCrypt errors
     case NO_ERROR_E :
         strncpy(buffer, "not in error state", max);
@@ -255,8 +259,12 @@ void SetErrorString(YasslError error, char* buffer)
         strncpy(buffer, "ASN: bad other signature confirmation", max);
         break;
 
-    case CERTFICATE_ERROR :
-        strncpy(buffer, "Unable to verify certificate", max);
+    case CONTENT_E :
+        strncpy(buffer, "bad content processing", max);
+        break;
+
+    case PEM_E :
+        strncpy(buffer, "bad PEM format processing", max);
         break;
 
     default :

extra/yassl/taocrypt/benchmark/make.bat

 REM quick and dirty build file for testing different MSDEVs
-
-@echo off
-REM Copyright (C) 2006 MySQL AB
-REM 
-REM This program is free software; you can redistribute it and/or modify
-REM it under the terms of the GNU General Public License as published by
-REM the Free Software Foundation; version 2 of the License.
-REM 
-REM This program is distributed in the hope that it will be useful,
-REM but WITHOUT ANY WARRANTY; without even the implied warranty of
-REM MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-REM GNU General Public License for more details.
-REM 
-REM You should have received a copy of the GNU General Public License
-REM along with this program; if not, write to the Free Software
-REM Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-@echo on
-
 setlocal 
 
 set myFLAGS= /I../include /I../mySTL /c /W3 /G6 /O2

extra/yassl/taocrypt/include/asn.hpp

@@ -99,6 +99,17 @@ enum DNTags
 };
 
 
+enum PCKS12_Tags
+{
+    /* DATA                      = 1, */ // from ASN1
+    SIGNED_DATA               = 2,
+    ENVELOPED_DATA            = 3,
+    SIGNED_AND_ENVELOPED_DATA = 4,
+    DIGESTED_DATA             = 5,
+    ENCRYPTED_DATA            = 6
+};
+
+
 enum Constants
 {
     MIN_DATE_SZ   = 13,
@@ -195,6 +206,16 @@ private:
 };
 
 
+// PKCS12 BER Decoder
+class PKCS12_Decoder : public BER_Decoder {
+public:
+    explicit PKCS12_Decoder(Source& s) : BER_Decoder(s) {}
+    void Decode();
+private:
+    void ReadHeader();
+};
+
+
 // General PublicKey
 class PublicKey {
     byte*  key_;
@@ -241,6 +262,7 @@ private:
 typedef STL::list<Signer*> SignerList;
 
 
+enum ContentType { HUH = 651 };
 enum SigType  { SHAwDSA = 517, MD2wRSA = 646, MD5wRSA = 648, SHAwRSA =649};
 enum HashType { MD2h = 646, MD5h = 649, SHAh = 88 };
 enum KeyType  { DSAk = 515, RSAk = 645 };     // sums of algo OID
@@ -345,6 +367,12 @@ private:
 };
 
 
+// Get Cert in PEM format from BEGIN to END
+int GetCert(Source&);
+
+// Get Cert in PEM format from pkcs12 file
+int GetPKCS_Cert(const char* password, Source&);
+
 } // namespace
 
 

extra/yassl/taocrypt/include/error.hpp

@@ -70,8 +70,12 @@ DSA_SZ_E        = 1035, // "bad DSA r or s size"
 BEFORE_DATE_E   = 1036, // "before date in the future"
 AFTER_DATE_E    = 1037, // "after date in the past"
 SIG_CONFIRM_E   = 1038, // "bad self  signature confirmation"
-SIG_OTHER_E     = 1039  // "bad other signature confirmation"
+SIG_OTHER_E     = 1039, // "bad other signature confirmation"
 
+CONTENT_E       = 1040, // "bad content processing"
+PEM_E           = 1041  // "bad pem format error"
+
+    //  add error string to yassl/src/yassl_error.cpp !!! 
 };
 
 

extra/yassl/taocrypt/include/file.hpp

@@ -71,8 +71,10 @@ public:
     void   SetError(ErrorNumber w) { error_.SetError(w); }
 
     friend class FileSource;  // for get()
-private:
-    Source(const Source& that) : buffer_(that.buffer_), current_(that.current_) {}
+
+    Source(const Source& that)
+        : buffer_(that.buffer_), current_(that.current_) {}
+
     Source& operator=(const Source& that)
     {
         Source tmp(that);

extra/yassl/taocrypt/src/asn.cpp

@@ -1098,4 +1098,83 @@ word32 DecodeDSA_Signature(byte* decoded, const byte* encoded, word32 sz)
 }
 
 
+// Get Cert in PEM format from BEGIN to END
+int GetCert(Source& source)
+{
+    char header[] = "-----BEGIN CERTIFICATE-----";
+    char footer[] = "-----END CERTIFICATE-----";
+
+    char* begin = strstr((char*)source.get_buffer(), header);
+    char* end   = strstr((char*)source.get_buffer(), footer);
+
+    if (!begin || !end || begin >= end) return -1;
+
+    end += strlen(footer); 
+    if (*end == '\r') end++;
+
+    Source tmp((byte*)begin, end - begin + 1);
+    source.Swap(tmp);
+
+    return 0;
+}
+
+
+
+// Decode a BER encoded PKCS12 structure
+void PKCS12_Decoder::Decode()
+{
+    ReadHeader();
+    if (source_.GetError().What()) return;
+
+    // Get AuthSafe
+
+    GetSequence();
+    
+        // get object id
+    byte obj_id = source_.next();
+    if (obj_id != OBJECT_IDENTIFIER) {
+        source_.SetError(OBJECT_ID_E);
+        return;
+    }
+
+    word32 length = GetLength(source_);
+
+    word32 algo_sum = 0;
+    while (length--)
+        algo_sum += source_.next();
+
+    
+       
+
+
+
+    // Get MacData optional
+    /*
+    mac     digestInfo  like certdecoder::getdigest?
+    macsalt octet string
+    iter    integer
+    
+    */
+}
+
+
+void PKCS12_Decoder::ReadHeader()
+{
+    // Gets Version
+    GetSequence();
+    GetVersion();
+}
+
+
+// Get Cert in PEM format from pkcs12 file
+int GetPKCS_Cert(const char* password, Source& source)
+{
+    PKCS12_Decoder pkcs12(source);
+    pkcs12.Decode();
+
+    return 0;
+}
+
+
+
 } // namespace

extra/yassl/taocrypt/src/coding.cpp

@@ -131,8 +131,7 @@ void HexDecoder::Decode()
 void Base64Encoder::Encode()
 {
     word32 bytes = plain_.size();
-    word32 outSz = bytes * 4 / 3;
-    outSz += (outSz % 4);           // 4 byte integrals         
+    word32 outSz = (bytes + 3 - 1) / 3 * 4;
 
     outSz += (outSz + pemLineSz - 1) / pemLineSz;  // new lines
     encoded_.New(outSz);
@@ -159,7 +158,7 @@ void Base64Encoder::Encode()
 
         bytes -= 3;
 
-        if ((++j % 16) == 0)
+        if ((++j % 16) == 0 && bytes)
             encoded_[i++] = '\n';
     }
 
@@ -236,11 +235,18 @@ void Base64Decoder::Decode()
         if ((++j % 16) == 0) {
             byte endLine = coded_.next();
             bytes--;
+            while (endLine == ' ') {        // remove possible whitespace
+                endLine = coded_.next();
+                bytes--;
+            }
             if (endLine == '\r') {
                 endLine = coded_.next();
                 bytes--;
             }
-            assert(endLine == '\n');
+            if (endLine != '\n') {
+                coded_.SetError(PEM_E); 
+                return;
+            }
         }
     }
 

extra/yassl/taocrypt/src/integer.cpp

@@ -88,7 +88,7 @@ namespace TaoCrypt {
 #ifdef SSE2_INTRINSICS_AVAILABLE
 
 template <class T>
-CPP_TYPENAME AllocatorBase<T>::pointer AlignedAllocator<T>::allocate(
+CPP_TYPENAME AlignedAllocator<T>::pointer AlignedAllocator<T>::allocate(
                                            size_type n, const void *)
 {
     CheckSize(n);
@@ -572,24 +572,29 @@ static word AtomicInverseModPower2(word A)
 class Portable
 {
 public:
-    static word Add(word *C, const word *A, const word *B, unsigned int N);
-    static word Subtract(word *C, const word *A, const word*B, unsigned int N);
-
-    static void Multiply2(word *C, const word *A, const word *B);
-    static word Multiply2Add(word *C, const word *A, const word *B);
-    static void Multiply4(word *C, const word *A, const word *B);
-    static void Multiply8(word *C, const word *A, const word *B);
-    static unsigned int MultiplyRecursionLimit() {return 8;}
-
-    static void Multiply2Bottom(word *C, const word *A, const word *B);
-    static void Multiply4Bottom(word *C, const word *A, const word *B);
-    static void Multiply8Bottom(word *C, const word *A, const word *B);
-    static unsigned int MultiplyBottomRecursionLimit() {return 8;}
-
-    static void Square2(word *R, const word *A);
-    static void Square4(word *R, const word *A);
-    static void Square8(word *R, const word *A) {assert(false);}
-    static unsigned int SquareRecursionLimit() {return 4;}
+    static word TAOCRYPT_CDECL Add(word *C, const word *A, const word *B,
+                                   unsigned int N);
+    static word TAOCRYPT_CDECL Subtract(word *C, const word *A, const word*B,
+                                        unsigned int N);
+    static void TAOCRYPT_CDECL Multiply2(word *C, const word *A, const word *B);
+    static word TAOCRYPT_CDECL Multiply2Add(word *C,
+                                            const word *A, const word *B);
+    static void TAOCRYPT_CDECL Multiply4(word *C, const word *A, const word *B);
+    static void TAOCRYPT_CDECL Multiply8(word *C, const word *A, const word *B);
+    static unsigned int TAOCRYPT_CDECL MultiplyRecursionLimit() {return 8;}
+
+    static void TAOCRYPT_CDECL Multiply2Bottom(word *C, const word *A,
+                                               const word *B);
+    static void TAOCRYPT_CDECL Multiply4Bottom(word *C, const word *A,
+                                               const word *B);
+    static void TAOCRYPT_CDECL Multiply8Bottom(word *C, const word *A,
+                                               const word *B);
+    static unsigned int TAOCRYPT_CDECL MultiplyBottomRecursionLimit(){return 8;}
+
+    static void TAOCRYPT_CDECL Square2(word *R, const word *A);
+    static void TAOCRYPT_CDECL Square4(word *R, const word *A);
+    static void TAOCRYPT_CDECL Square8(word *R, const word *A) {assert(false);}
+    static unsigned int TAOCRYPT_CDECL SquareRecursionLimit() {return 4;}
 };
 
 word Portable::Add(word *C, const word *A, const word *B, unsigned int N)

extra/yassl/taocrypt/src/make.bat

 REM quick and dirty build file for testing different MSDEVs
-
-@echo off
-REM Copyright (C) 2006 MySQL AB
-REM 
-REM This program is free software; you can redistribute it and/or modify
-REM it under the terms of the GNU General Public License as published by
-REM the Free Software Foundation; version 2 of the License.
-REM 
-REM This program is distributed in the hope that it will be useful,
-REM but WITHOUT ANY WARRANTY; without even the implied warranty of
-REM MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-REM GNU General Public License for more details.
-REM 
-REM You should have received a copy of the GNU General Public License
-REM along with this program; if not, write to the Free Software
-REM Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-@echo on
-
 setlocal 
 
 set myFLAGS= /I../include /I../mySTL /c /W3 /G6 /O2 

extra/yassl/taocrypt/test/make.bat

 REM quick and dirty build file for testing different MSDEVs
-
-@echo off
-REM Copyright (C) 2006 MySQL AB
-REM 
-REM This program is free software; you can redistribute it and/or modify
-REM it under the terms of the GNU General Public License as published by
-REM the Free Software Foundation; version 2 of the License.
-REM 
-REM This program is distributed in the hope that it will be useful,
-REM but WITHOUT ANY WARRANTY; without even the implied warranty of
-REM MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-REM GNU General Public License for more details.
-REM 
-REM You should have received a copy of the GNU General Public License
-REM along with this program; if not, write to the Free Software
-REM Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-@echo on
-
 setlocal 
 
 set myFLAGS= /I../include /I../mySTL /c /W3 /G6 /O2

extra/yassl/taocrypt/test/test.cpp

@@ -74,7 +74,8 @@ using TaoCrypt::EncodeDSA_Signature;
 using TaoCrypt::DecodeDSA_Signature;
 using TaoCrypt::PBKDF2_HMAC;
 using TaoCrypt::tcArrayDelete;
-
+using TaoCrypt::GetCert;
+using TaoCrypt::GetPKCS_Cert;
 
 
 struct testVector {
@@ -103,6 +104,7 @@ int  rsa_test();
 int  dsa_test();
 int  dh_test();
 int  pwdbased_test();
+int  pkcs12_test();
 
 TaoCrypt::RandomNumberGenerator rng;
 
@@ -228,6 +230,13 @@ void taocrypt_test(void* args)
     else
         printf( "PBKDF2   test passed!\n");
 
+    /* not ready yet
+    if ( (ret = pkcs12_test()) )
+        err_sys("PKCS12   test failed!\n", ret);
+    else
+        printf( "PKCS12   test passed!\n");
+    */
+
     tcArrayDelete(cipher);
     tcArrayDelete(plain);
     tcArrayDelete(msg);
@@ -994,3 +1003,38 @@ int pwdbased_test()
 
     return 0;
 }
+
+
+int pkcs12_test()
+{
+    Source cert;
+    FileSource("../certs/server-cert.pem", cert);
+    if (cert.size() == 0) {
+        FileSource("../../certs/server-cert.pem", cert);  // for testsuite
+        if (cert.size() == 0) {
+            FileSource("../../../certs/server-cert.pem", cert); // Debug dir
+            if (cert.size() == 0)
+                err_sys("where's your certs dir?", -109);
+        }
+    }
+
+    if (GetCert(cert) != 0)
+        return -110;
+
+    Source source;
+    FileSource("../certs/server.p12", source);
+    if (source.size() == 0) {
+        FileSource("../../certs/server.p12", source);  // for testsuite
+        if (source.size() == 0) {
+            FileSource("../../../certs/server.p12", source); // Debug dir
+            if (source.size() == 0)
+                err_sys("where's your certs dir?", -111);
+        }
+    }
+
+    if (GetPKCS_Cert("password", source) != 0)
+        return -112;
+
+    return 0;
+}
+

extra/yassl/testsuite/make.bat

 REM quick and dirty build file for testing different MSDEVs
-
-@echo off
-REM Copyright (C) 2006 MySQL AB
-REM 
-REM This program is free software; you can redistribute it and/or modify
-REM it under the terms of the GNU General Public License as published by
-REM the Free Software Foundation; version 2 of the License.
-REM 
-REM This program is distributed in the hope that it will be useful,
-REM but WITHOUT ANY WARRANTY; without even the implied warranty of
-REM MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-REM GNU General Public License for more details.
-REM 
-REM You should have received a copy of the GNU General Public License
-REM along with this program; if not, write to the Free Software
-REM Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
-@echo on
-
 setlocal 
 
 set myFLAGS= /I../include /I../taocrypt/include /I../taocrypt/mySTL /c /W3 /G6 /O2 /MT /D"WIN32" /D"NO_MAIN_DRIVER"

extra/yassl/testsuite/test.hpp

@@ -40,8 +40,11 @@
 
 // Check type of third arg to accept
 #if defined(__hpux)
-// HPUX doesn't use socklent_t for third parameter to accept
+// HPUX uses int* for third parameter to accept
     typedef int*       ACCEPT_THIRD_T;
+#elif defined(__NETWARE__)
+// NetWare uses size_t* for third parameter to accept
+    typedef size_t*       ACCEPT_THIRD_T;
 #else
     typedef socklen_t* ACCEPT_THIRD_T;
 #endif

extra/yassl/testsuite/testsuite.cpp

@@ -86,8 +86,8 @@ int main(int argc, char** argv)
             // input output compare
     byte input[TaoCrypt::MD5::DIGEST_SIZE];
     byte output[TaoCrypt::MD5::DIGEST_SIZE];
-    file_test((char*) "input", input);
-    file_test((char*) "output", output);
+    file_test("input", input);
+    file_test("output", output);
     assert(memcmp(input, output, sizeof(input)) == 0);
 
     printf("\nAll tests passed!\n");

mysql-test/mysql-test-run.pl

@@ -309,6 +309,8 @@ our %mysqld_variables;
 
 my $source_dist= 0;
 
+our $opt_max_save_core= 5;
+my $num_saved_cores= 0;  # Number of core files saved in vardir/log/ so far.
 
 ######################################################################
 #
@@ -569,6 +571,7 @@ sub command_line_setup () {
              'strace-client'            => \$opt_strace_client,
              'master-binary=s'          => \$exe_master_mysqld,
              'slave-binary=s'           => \$exe_slave_mysqld,
+             'max-save-core=i'          => \$opt_max_save_core,
 
              # Coverage, profiling etc
              'gcov'                     => \$opt_gcov,
@@ -3403,10 +3406,12 @@ sub save_files_before_restore($$) {
   # Look for core files
   foreach my $core_file ( glob("$data_dir/core*") )
   {
+    last if $opt_max_save_core > 0 && $num_saved_cores >= $opt_max_save_core;
     my $core_name= basename($core_file);
     mtr_report("Saving $core_name");
     mkdir($save_name) if ! -d $save_name;
     rename("$core_file", "$save_name/$core_name");
+    ++$num_saved_cores;
   }
 }
 
@@ -5001,6 +5006,9 @@ Options for debugging the product
   master-binary=PATH    Specify the master "mysqld" to use
   slave-binary=PATH     Specify the slave "mysqld" to use
   strace-client         Create strace output for mysqltest client
+  max-save-core         Limit the number of core files saved (to avoid filling
+                        up disks for heavily crashing server). Defaults to
+                        $opt_max_save_core, set to 0 for no limit.
 
 Options for coverage, profiling etc
 

mysql-test/r/mysqltest.result

@@ -269,6 +269,15 @@ mysqltest: At line 1: Missing assignment operator in let
 1
 # Execute: echo $success ;
 1 
+# Check if let $B = $A is an assignment per value.
+let $A = initial value of A;
+let $B = initial value of B;
+let $B = $A
+# Content of $A is: initial value of B
+let $A = changed value of A;
+# Content of $B is: initial value of B
+let $B = changed value of B;
+# Content of $A is: changed value of A
 mysqltest: At line 1: Missing required argument 'filename' to command 'source'
 mysqltest: At line 1: Could not open file ./non_existingFile
 mysqltest: In included file "MYSQLTEST_VARDIR/tmp/recursive.sql": At line 1: Source directives are nesting too deep

mysql-test/r/select.result

@@ -3634,3 +3634,33 @@ INSERT into t1 values (1), (2), (3);
 SELECT * FROM t1 LIMIT 2, -1;
 ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-1' at line 1
 DROP TABLE t1;
+create table t1 (a bigint unsigned);
+insert into t1 values
+(if(1, 9223372036854775808, 1)),
+(case when 1 then 9223372036854775808 else 1 end),
+(coalesce(9223372036854775808, 1));
+select * from t1;
+a
+9223372036854775808
+9223372036854775808
+9223372036854775808
+drop table t1;
+create table t1 select
+if(1, 9223372036854775808, 1) i,
+case when 1 then 9223372036854775808 else 1 end c,
+coalesce(9223372036854775808, 1) co;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `i` decimal(19,0) NOT NULL default '0',
+  `c` decimal(19,0) NOT NULL default '0',
+  `co` decimal(19,0) NOT NULL default '0'
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+drop table t1;
+select 
+if(1, cast(1111111111111111111 as unsigned), 1) i,
+case when 1 then cast(1111111111111111111 as unsigned) else 1 end c,
+coalesce(cast(1111111111111111111 as unsigned), 1) co;
+i	c	co
+1111111111111111111	1111111111111111111	1111111111111111111
+End of 5.0 tests

mysql-test/t/mysqltest.test

@@ -688,6 +688,36 @@ echo # <whatever> success: $success ;
 --echo # Execute: echo \$success ;
 echo $success ;
 
+
+# ----------------------------------------------------------------------------
+# Test to assign let from variable
+# let $<var_name>=$<var_name>;
+# ----------------------------------------------------------------------------
+
+--echo # Check if let \$B = \$A is an assignment per value.
+
+# Basic preparations:
+--echo let \$A = initial value of A;
+let $A = initial value of A;
+# --echo # Content of \$A is: $A
+--echo let \$B = initial value of B;
+let $B = initial value of B;
+# --echo # Content of \$B is: $B
+
+# Assign $B to $A:
+--echo let \$B = \$A
+let $A = $B;
+--echo # Content of \$A is: $A
+
+# Changes of $B must NOT affect $A and Changes of $A must NOT affect $B !
+--echo let \$A = changed value of A;
+let $A = changed value of A;
+--echo # Content of \$B is: $B
+
+--echo let \$B = changed value of B;
+let $B = changed value of B;
+--echo # Content of \$A is: $A
+
 # ----------------------------------------------------------------------------
 # Test to assign let from query
 # let $<var_name>=`<query>`;

mysql-test/t/select.test

@@ -3123,3 +3123,27 @@ SELECT * FROM t1 LIMIT 2, -1;
 
 DROP TABLE t1;
 
+#
+# Bug #22026: Warning when using IF statement and large unsigned bigint
+#
+
+create table t1 (a bigint unsigned);
+insert into t1 values
+  (if(1, 9223372036854775808, 1)),
+  (case when 1 then 9223372036854775808 else 1 end),
+  (coalesce(9223372036854775808, 1));
+select * from t1;
+drop table t1;
+create table t1 select
+  if(1, 9223372036854775808, 1) i,
+  case when 1 then 9223372036854775808 else 1 end c,
+  coalesce(9223372036854775808, 1) co;
+show create table t1;
+drop table t1;
+# Ensure we handle big values properly
+select 
+  if(1, cast(1111111111111111111 as unsigned), 1) i,
+  case when 1 then cast(1111111111111111111 as unsigned) else 1 end c,
+  coalesce(cast(1111111111111111111 as unsigned), 1) co;
+
+--echo End of 5.0 tests

sql/item_cmpfunc.cc

@@ -26,13 +26,17 @@
 
 static bool convert_constant_item(THD *thd, Field *field, Item **item);
 
-static Item_result item_store_type(Item_result a,Item_result b)
+static Item_result item_store_type(Item_result a, Item *item,
+                                   my_bool unsigned_flag)
 {
+  Item_result b= item->result_type();
+
   if (a == STRING_RESULT || b == STRING_RESULT)
     return STRING_RESULT;
   else if (a == REAL_RESULT || b == REAL_RESULT)
     return REAL_RESULT;
-  else if (a == DECIMAL_RESULT || b == DECIMAL_RESULT)
+  else if (a == DECIMAL_RESULT || b == DECIMAL_RESULT ||
+           unsigned_flag != item->unsigned_flag)
     return DECIMAL_RESULT;
   else
     return INT_RESULT;
@@ -41,6 +45,7 @@ static Item_result item_store_type(Item_result a,Item_result b)
 static void agg_result_type(Item_result *type, Item **items, uint nitems)
 {
   Item **item, **item_end;
+  my_bool unsigned_flag= 0;
 
   *type= STRING_RESULT;
   /* Skip beginning NULL items */
@@ -49,6 +54,7 @@ static void agg_result_type(Item_result *type, Item **items, uint nitems)
     if ((*item)->type() != Item::NULL_ITEM)
     {
       *type= (*item)->result_type();
+      unsigned_flag= (*item)->unsigned_flag;
       item++;
       break;
     }
@@ -57,7 +63,7 @@ static void agg_result_type(Item_result *type, Item **items, uint nitems)
   for (; item < item_end; item++)
   {
     if ((*item)->type() != Item::NULL_ITEM)
-      *type= item_store_type(type[0], (*item)->result_type());
+      *type= item_store_type(*type, *item, unsigned_flag);
   }
 }