feat(datatypes): MCOL-4632 and MCOL-4648, fix cast leads to NULL.

Remove redundant cast. As C-style casts with a type name in parantheses are interpreted as static_casts this literally just changes the interpretation around (and forces an implicit cast to match the return value of the function). Switch UBIGINTNULL and UBIGINTEMPTYROW constants for consistency. Make consistent with relation between BIGINTNULL and BIGINTEMPTYROW & make adapted cast behaviour due to NULL markers more intuitive. (After this change we can simply block the highest possible uint64_t value and if a cast results in it, print the next lower value (2^64 - 2). Previously, (2^64 - 1) was able to be printed, but (2^64 - 2) as being blocked by the UBIGINTNULL constant was not, making finding the appropiate replacement value to give out more confusing. Introduce MAX_MCS_UBIGINT and MIN_MCS_BIGINT and adapt casts. Adapt casting to BIGINT to remove NULL marker error. Add bugfix regression test for MCOL 4632 Add regression test for mcol_4648 Revert "Switch UBIGINTNULL and UBIGINTEMPTYROW constants for consistency." This reverts commit 83eac11. Due to backwards compatability issues. Refactor casting to MCS[U]Int to datatype functions. Update regression tests to include other affected datatypes. Apply formatting. Refactor according to PR review Remove redundant new constant, switch to using already existing constant. Adapt nullstring casting to EMPTYROW markers for backwards compatability. Adapt tests for backward compatability behaviour allowing text datatypes to be casted to EMPTYROW constant. Adapt mcol641-functions test according to bug fix. Update tests according to new expected behaviour. Adapt tests to new understanding of issue. Update comments/documentation for MCOL_4632 test. Adapt to new cast limit logic. Make bracketing consistent. Adapt previous regression test to new expected behaviour.
mariadb-corporation · Aug 11, 2023 · 48562e4 · 48562e4
1 parent 4b20ced
commit 48562e4
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diff --git a/datatypes/mcs_datatype.h b/datatypes/mcs_datatype.h
@@ -21,6 +21,7 @@
 #include <boost/any.hpp>
 #include "exceptclasses.h"
 #include "conststring.h"
+#include "mcs_datatype_basic.h"
 #include "mcs_numeric_limits.h"
 #include "mcs_data_condition.h"
 #include "mcs_decimal.h"
@@ -34,46 +35,6 @@ typedef int32_t mcs_sint32_t;
 struct charset_info_st;
 typedef const struct charset_info_st CHARSET_INFO;
 
-
-namespace
-{
-const int64_t MIN_TINYINT __attribute__((unused)) = std::numeric_limits<int8_t>::min() + 2;    // -126;
-const int64_t MAX_TINYINT __attribute__((unused)) = std::numeric_limits<int8_t>::max();        //  127;
-const int64_t MIN_SMALLINT __attribute__((unused)) = std::numeric_limits<int16_t>::min() + 2;  // -32766;
-const int64_t MAX_SMALLINT __attribute__((unused)) = std::numeric_limits<int16_t>::max();      //  32767;
-const int64_t MIN_MEDINT __attribute__((unused)) = -(1ULL << 23);                              // -8388608;
-const int64_t MAX_MEDINT __attribute__((unused)) = (1ULL << 23) - 1;                           //  8388607;
-const int64_t MIN_INT __attribute__((unused)) = std::numeric_limits<int32_t>::min() + 2;       // -2147483646;
-const int64_t MAX_INT __attribute__((unused)) = std::numeric_limits<int32_t>::max();           //  2147483647;
-const int64_t MIN_BIGINT __attribute__((unused)) =
-    std::numeric_limits<int64_t>::min() + 2;  // -9223372036854775806LL;
-const int64_t MAX_BIGINT __attribute__((unused)) =
-    std::numeric_limits<int64_t>::max();  //  9223372036854775807
-
-const uint64_t MIN_UINT __attribute__((unused)) = 0;
-const uint64_t MIN_UTINYINT __attribute__((unused)) = 0;
-const uint64_t MIN_USMALLINT __attribute__((unused)) = 0;
-const uint64_t MIN_UMEDINT __attribute__((unused)) = 0;
-const uint64_t MIN_UBIGINT __attribute__((unused)) = 0;
-const uint64_t MAX_UINT __attribute__((unused)) = std::numeric_limits<uint32_t>::max() - 2;     // 4294967293
-const uint64_t MAX_UTINYINT __attribute__((unused)) = std::numeric_limits<uint8_t>::max() - 2;  // 253;
-const uint64_t MAX_USMALLINT __attribute__((unused)) = std::numeric_limits<uint16_t>::max() - 2;  // 65533;
-const uint64_t MAX_UMEDINT __attribute__((unused)) = (1ULL << 24) - 1;                            // 16777215
-const uint64_t MAX_UBIGINT __attribute__((unused)) =
-    std::numeric_limits<uint64_t>::max() - 2;  // 18446744073709551613
-
-const float MAX_FLOAT __attribute__((unused)) = std::numeric_limits<float>::max();  // 3.402823466385289e+38
-const float MIN_FLOAT __attribute__((unused)) = -std::numeric_limits<float>::max();
-const double MAX_DOUBLE __attribute__((unused)) =
-    std::numeric_limits<double>::max();  // 1.7976931348623157e+308
-const double MIN_DOUBLE __attribute__((unused)) = -std::numeric_limits<double>::max();
-const long double MAX_LONGDOUBLE __attribute__((unused)) =
-    std::numeric_limits<long double>::max();  // 1.7976931348623157e+308
-const long double MIN_LONGDOUBLE __attribute__((unused)) = -std::numeric_limits<long double>::max();
-
-const uint64_t AUTOINCR_SATURATED __attribute__((unused)) = std::numeric_limits<uint64_t>::max();
-}  // namespace
-
 using namespace std;  // e.g. string
 
 namespace ddlpackage

diff --git a/datatypes/mcs_datatype_basic.h b/datatypes/mcs_datatype_basic.h
@@ -18,11 +18,50 @@
 */
 #pragma once
 
+#include <limits>
+#include "joblisttypes.h"
+
 /*
   This file contains simple definitions that can be
   needed in multiple mcs_TYPE.h files.
 */
 
+namespace
+{
+const int64_t MIN_TINYINT __attribute__((unused)) = std::numeric_limits<int8_t>::min() + 2;    // -126;
+const int64_t MAX_TINYINT __attribute__((unused)) = std::numeric_limits<int8_t>::max();        //  127;
+const int64_t MIN_SMALLINT __attribute__((unused)) = std::numeric_limits<int16_t>::min() + 2;  // -32766;
+const int64_t MAX_SMALLINT __attribute__((unused)) = std::numeric_limits<int16_t>::max();      //  32767;
+const int64_t MIN_MEDINT __attribute__((unused)) = -(1ULL << 23);                              // -8388608;
+const int64_t MAX_MEDINT __attribute__((unused)) = (1ULL << 23) - 1;                           //  8388607;
+const int64_t MIN_INT __attribute__((unused)) = std::numeric_limits<int32_t>::min() + 2;       // -2147483646;
+const int64_t MAX_INT __attribute__((unused)) = std::numeric_limits<int32_t>::max();           //  2147483647;
+const int64_t MIN_BIGINT = std::numeric_limits<int64_t>::min() + 2;  // -9223372036854775806LL;
+const int64_t MAX_BIGINT = std::numeric_limits<int64_t>::max();      //  9223372036854775807
+
+const uint64_t MIN_UINT __attribute__((unused)) = 0;
+const uint64_t MIN_UTINYINT __attribute__((unused)) = 0;
+const uint64_t MIN_USMALLINT __attribute__((unused)) = 0;
+const uint64_t MIN_UMEDINT __attribute__((unused)) = 0;
+const uint64_t MIN_UBIGINT = 0;
+const uint64_t MAX_UINT __attribute__((unused)) = std::numeric_limits<uint32_t>::max() - 2;     // 4294967293
+const uint64_t MAX_UTINYINT __attribute__((unused)) = std::numeric_limits<uint8_t>::max() - 2;  // 253;
+const uint64_t MAX_USMALLINT __attribute__((unused)) = std::numeric_limits<uint16_t>::max() - 2;  // 65533;
+const uint64_t MAX_UMEDINT __attribute__((unused)) = (1ULL << 24) - 1;                            // 16777215
+const uint64_t MAX_UBIGINT = std::numeric_limits<uint64_t>::max() - 2;  // 18446744073709551613
+
+const float MAX_FLOAT __attribute__((unused)) = std::numeric_limits<float>::max();  // 3.402823466385289e+38
+const float MIN_FLOAT __attribute__((unused)) = -std::numeric_limits<float>::max();
+const double MAX_DOUBLE __attribute__((unused)) =
+    std::numeric_limits<double>::max();  // 1.7976931348623157e+308
+const double MIN_DOUBLE __attribute__((unused)) = -std::numeric_limits<double>::max();
+const long double MAX_LONGDOUBLE __attribute__((unused)) =
+    std::numeric_limits<long double>::max();  // 1.7976931348623157e+308
+const long double MIN_LONGDOUBLE __attribute__((unused)) = -std::numeric_limits<long double>::max();
+
+const uint64_t AUTOINCR_SATURATED __attribute__((unused)) = std::numeric_limits<uint64_t>::max();
+}  // namespace
+
 namespace datatypes
 {
 // Convert a positive floating point value to
@@ -57,9 +96,14 @@ template <typename SRC>
 int64_t xFloatToMCSSInt64Round(SRC value)
 {
   if (value > 0)
-    return positiveXFloatToXIntRound<SRC, int64_t>(value, numeric_limits<int64_t>::max());
+  {
+    return positiveXFloatToXIntRound<SRC, int64_t>(value, MAX_BIGINT);
+  }
   if (value < 0)
-    return negativeXFloatToXIntRound<SRC, int64_t>(value, numeric_limits<int64_t>::min() + 2);
+  {
+    //@Bug 4632 and 4648: Don't return marker value for NULL, but allow return of marker value for EMPTYROW.
+    return negativeXFloatToXIntRound<SRC, int64_t>(value, joblist::BIGINTEMPTYROW);
+  }
   return 0;
 }
 
@@ -69,12 +113,17 @@ template <typename SRC>
 uint64_t xFloatToMCSUInt64Round(SRC value)
 {
   if (value > 0)
-    return positiveXFloatToXIntRound<SRC, uint64_t>(value, numeric_limits<uint64_t>::max() - 2);
+  {
+    //@Bug 4632 and 4648: Don't return marker value for NULL, but allow return of marker value for EMPTYROW.
+    const auto val = positiveXFloatToXIntRound<SRC, uint64_t>(value, joblist::UBIGINTEMPTYROW);
+    return val == joblist::UBIGINTNULL ? MAX_UBIGINT : val;
+  }
   if (value < 0)
-    return negativeXFloatToXIntRound<SRC, uint64_t>(value, 0);
+  {
+    return negativeXFloatToXIntRound<SRC, uint64_t>(value, MIN_UBIGINT);
+  }
 
   return 0;
 }
 
 }  // end of namespace datatypes
-
diff --git a/datatypes/mcs_decimal.h b/datatypes/mcs_decimal.h
@@ -185,7 +185,6 @@ const long long columnstore_precision[19] = {0,
                                              99999999999999999LL,
                                              999999999999999999LL};
 
-
 const int128_t ConversionRangeMaxValue[20] = {9999999999999999999_xxl,
                                               99999999999999999999_xxl,
                                               999999999999999999999_xxl,
@@ -667,6 +666,18 @@ class Decimal : public TDecimal128, public TDecimal64
                                                    : TDecimal64::toUInt64Round((uint32_t)scale);
   }
 
+  int64_t toMCSInt64Round() const
+  {
+    //@Bug 4632 and 4648: Don't return marker value for NULL, but allow return of marker value for EMPTYROW.
+    return std::max(toSInt64Round(), static_cast<int64_t>(joblist::BIGINTEMPTYROW));
+  }
+  uint64_t toMCSUInt64Round() const
+  {
+    const auto val = toUInt64Round();
+    //@Bug 4632 and 4648: Don't return marker value for NULL, but allow return of marker value for EMPTYROW.
+    return val == joblist::UBIGINTNULL ? MAX_UBIGINT : val;
+  }
+
   // FLOOR related routines
   int64_t toSInt64Floor() const
   {

diff --git a/datatypes/mcs_int64.h b/datatypes/mcs_int64.h
@@ -18,7 +18,9 @@
 */
 #pragma once
 
+#include <algorithm>
 #include "exceptclasses.h"
+#include "mcs_datatype_basic.h"
 
 namespace datatypes
 {
@@ -60,6 +62,18 @@ class TUInt64
   {
     *(uint64_t*)dst = mValue;
   }
+
+  uint64_t toMCSUInt64() const
+  {
+    //@Bug 4632 and 4648: Don't return marker value for NULL, but allow return of marker value for EMPTYROW.
+    return mValue == joblist::UBIGINTNULL ? MAX_UBIGINT : mValue;
+  }
+
+  int64_t toMCSInt64() const
+  {
+    //@Bug 4632 and 4648: Don't return marker value for NULL, but allow return of marker value for EMPTYROW.
+    return std::max(static_cast<int64_t>(mValue), static_cast<int64_t>(joblist::BIGINTEMPTYROW));
+  }
 };
 
 class TSInt64
@@ -84,6 +98,16 @@ class TSInt64
   {
     return mValue < 0 ? 0 : static_cast<uint64_t>(mValue);
   }
+
+  uint64_t toMCSUInt64() const
+  {
+    return static_cast<uint64_t>(mValue);
+  }
+
+  int64_t toMCSInt64() const
+  {
+    return std::max(static_cast<int64_t>(mValue), static_cast<int64_t>(joblist::BIGINTEMPTYROW));
+  }
 };
 
 class TUInt64Null : public TUInt64, public TNullFlag
@@ -178,4 +202,3 @@ class TSInt64Null : public TSInt64, public TNullFlag
 };
 
 }  // end of namespace datatypes
-
diff --git a/dbcon/ddlpackageproc/altertableprocessor.cpp b/dbcon/ddlpackageproc/altertableprocessor.cpp
@@ -424,7 +424,6 @@ AlterTableProcessor::DDLResult AlterTableProcessor::processPackage(
           abs_ts.tv_nsec = rm_ts.tv_nsec;
         } while (nanosleep(&abs_ts, &rm_ts) < 0);
 
-
         try
         {
           processID = ::getpid();
@@ -939,7 +938,7 @@ void AlterTableProcessor::addColumn(uint32_t sessionID, execplan::CalpontSystemC
     createWriteDropLogFile(ropair.objnum, uniqueId, oidList);
 
     //@Bug 1358,1427 Always use the first column in the table, not the first one in columnlist to prevent
-    //random result
+    // random result
     //@Bug 4182. Use widest column as reference column
 
     // Find the widest column

diff --git a/mysql-test/columnstore/basic/r/mcol641-functions.result b/mysql-test/columnstore/basic/r/mcol641-functions.result
@@ -1112,8 +1112,8 @@ SELECT "convert_test", CONVERT(d1, SIGNED), CONVERT(d2, SIGNED), CONVERT(d3, SIG
 convert_test	CONVERT(d1, SIGNED)	CONVERT(d2, SIGNED)	CONVERT(d3, SIGNED)
 convert_test	NULL	NULL	NULL
 convert_test	0	0	0
-convert_test	NULL	NULL	0
-convert_test	NULL	NULL	0
+convert_test	-9223372036854775807	-9223372036854775807	0
+convert_test	-9223372036854775807	-9223372036854775807	0
 convert_test	-123456	-123	0
 convert_test	123456	123	0
 convert_test	9223372036854775807	9223372036854775807	0

diff --git a/mysql-test/columnstore/bugfixes/mcol_4632.result b/mysql-test/columnstore/bugfixes/mcol_4632.result
@@ -0,0 +1,41 @@
+#
+# MCOL-4632: Disallow casting to NULL marker values, allow casting to EMPTY ROW values.
+#
+# Defined in joblisttypes.h: BIGINTNULL = 0x8000000000000000ULL == -9223372036854775808 (when casted to int64_t)
+# Defined in joblisttypes.h: BIGINTEMPTYROW = 0x8000000000000001ULL == -9223372036854775807 (when casted to int64_t)
+#
+DROP DATABASE IF EXISTS mcol_4632;
+CREATE DATABASE mcol_4632;
+USE mcol_4632;
+CREATE TABLE t1 
+(d1 DECIMAL(30,0), d2 DECIMAL(30,0) NOT NULL,
+i1 BIGINT UNSIGNED, i2 BIGINT UNSIGNED NOT NULL,
+str1 TEXT, str2 TEXT NOT NULL,
+double1 DOUBLE(30,0), double2 DOUBLE(30,0) NOT NULL) ENGINE=ColumnStore;
+INSERT INTO t1 VALUES 
+(-9223372036854775808, -9223372036854775808,
+9223372036854775808, 9223372036854775808,
+"-9223372036854775808", "-9223372036854775808",
+-9223372036854775808.0, -9223372036854775808.0);
+INSERT INTO t1 VALUES 
+(-9223372036854775807, -9223372036854775807,
+9223372036854775809, 9223372036854775809,
+"-9223372036854775807", "-9223372036854775807",
+-9223372036854775807.0, -9223372036854775807.0);
+SELECT d1, CAST(d1 AS SIGNED), CAST(d2 AS SIGNED) FROM t1;
+d1	CAST(d1 AS SIGNED)	CAST(d2 AS SIGNED)
+-9223372036854775808	-9223372036854775807	-9223372036854775807
+-9223372036854775807	-9223372036854775807	-9223372036854775807
+SELECT i1, CAST(i1 AS SIGNED), CAST(i2 AS SIGNED) FROM t1;
+i1	CAST(i1 AS SIGNED)	CAST(i2 AS SIGNED)
+9223372036854775808	-9223372036854775807	-9223372036854775807
+9223372036854775809	-9223372036854775807	-9223372036854775807
+SELECT str1, CAST(str1 AS SIGNED), CAST(str2 AS SIGNED) FROM t1;
+str1	CAST(str1 AS SIGNED)	CAST(str2 AS SIGNED)
+-9223372036854775808	-9223372036854775807	-9223372036854775807
+-9223372036854775807	-9223372036854775807	-9223372036854775807
+SELECT double1, CAST(double1 AS SIGNED), CAST(double2 AS SIGNED) FROM t1;
+double1	CAST(double1 AS SIGNED)	CAST(double2 AS SIGNED)
+-9223372036854776000	-9223372036854775807	-9223372036854775807
+-9223372036854776000	-9223372036854775807	-9223372036854775807
+DROP DATABASE mcol_4632;
diff --git a/mysql-test/columnstore/bugfixes/mcol_4632.test b/mysql-test/columnstore/bugfixes/mcol_4632.test
@@ -0,0 +1,32 @@
+--source ../include/have_columnstore.inc
+--echo #
+--echo # MCOL-4632: Disallow casting to NULL marker values, allow casting to EMPTY ROW values.
+--echo #
+--echo # Defined in joblisttypes.h: BIGINTNULL = 0x8000000000000000ULL == -9223372036854775808 (when casted to int64_t)
+--echo # Defined in joblisttypes.h: BIGINTEMPTYROW = 0x8000000000000001ULL == -9223372036854775807 (when casted to int64_t)
+--echo #
+--disable_warnings
+DROP DATABASE IF EXISTS mcol_4632;
+--enable_warnings
+CREATE DATABASE mcol_4632;
+USE mcol_4632;
+CREATE TABLE t1 
+     (d1 DECIMAL(30,0), d2 DECIMAL(30,0) NOT NULL,
+	 i1 BIGINT UNSIGNED, i2 BIGINT UNSIGNED NOT NULL,
+     str1 TEXT, str2 TEXT NOT NULL,
+     double1 DOUBLE(30,0), double2 DOUBLE(30,0) NOT NULL) ENGINE=ColumnStore;
+INSERT INTO t1 VALUES 
+	 (-9223372036854775808, -9223372036854775808,
+     9223372036854775808, 9223372036854775808,
+     "-9223372036854775808", "-9223372036854775808",
+     -9223372036854775808.0, -9223372036854775808.0);
+INSERT INTO t1 VALUES 
+	 (-9223372036854775807, -9223372036854775807,
+     9223372036854775809, 9223372036854775809,
+     "-9223372036854775807", "-9223372036854775807",
+     -9223372036854775807.0, -9223372036854775807.0);
+SELECT d1, CAST(d1 AS SIGNED), CAST(d2 AS SIGNED) FROM t1;
+SELECT i1, CAST(i1 AS SIGNED), CAST(i2 AS SIGNED) FROM t1;
+SELECT str1, CAST(str1 AS SIGNED), CAST(str2 AS SIGNED) FROM t1;
+SELECT double1, CAST(double1 AS SIGNED), CAST(double2 AS SIGNED) FROM t1;
+DROP DATABASE mcol_4632;
diff --git a/mysql-test/columnstore/bugfixes/mcol_4648.result b/mysql-test/columnstore/bugfixes/mcol_4648.result
@@ -0,0 +1,36 @@
+#
+# MCOL-4648: Disallow casting to NULL marker values, allow casting to EMPTY ROW values.
+#
+# Defined in joblisttypes.h: UBIGINTNULL == 0xFFFFFFFFFFFFFFFEULL == 18446744073709551614
+# Defined in joblisttypes.h: UBIGINTEMPTYROW == 0xFFFFFFFFFFFFFFFFULL == 18446744073709551615
+#
+DROP DATABASE IF EXISTS mcol_4648;
+CREATE DATABASE mcol_4648;
+USE mcol_4648;
+CREATE TABLE t1 
+(d1 DECIMAL(30,0), d2 DECIMAL(30,0) NOT NULL,
+str1 TEXT, str2 TEXT NOT NULL,
+double1 DOUBLE(30,0), double2 DOUBLE(30,0) NOT NULL) ENGINE=ColumnStore;
+INSERT INTO t1 VALUES 
+(18446744073709551614, 18446744073709551614,
+"18446744073709551614", "18446744073709551614",
+18446744073709551614.0, 18446744073709551614.0);
+INSERT INTO t1 VALUES
+(18446744073709551615, 18446744073709551615,
+"18446744073709551615", "18446744073709551615",
+18446744073709551615.0, 18446744073709551615.0);
+SELECT d1, CAST(d1 AS UNSIGNED), CAST(d2 AS UNSIGNED) FROM t1;
+d1	CAST(d1 AS UNSIGNED)	CAST(d2 AS UNSIGNED)
+18446744073709551614	18446744073709551613	18446744073709551613
+18446744073709551615	18446744073709551615	18446744073709551615
+SELECT str1, CAST(str1 AS UNSIGNED), CAST(str2 AS UNSIGNED) FROM t1;
+str1	CAST(str1 AS UNSIGNED)	CAST(str2 AS UNSIGNED)
+18446744073709551614	18446744073709551613	18446744073709551613
+18446744073709551615	18446744073709551615	18446744073709551615
+# Doubles only store about 15 digits of precision for decimal places, therefore both inserted numbers
+# are rounded to 18446744073709552000.0 and we expect them to be casted to EMPTYROW value each.
+SELECT double1, CAST(double1 AS UNSIGNED), CAST(double2 AS UNSIGNED) FROM t1;
+double1	CAST(double1 AS UNSIGNED)	CAST(double2 AS UNSIGNED)
+18446744073709552000	18446744073709551615	18446744073709551615
+18446744073709552000	18446744073709551615	18446744073709551615
+DROP DATABASE mcol_4648;
diff --git a/mysql-test/columnstore/bugfixes/mcol_4648.test b/mysql-test/columnstore/bugfixes/mcol_4648.test
@@ -0,0 +1,30 @@
+--source ../include/have_columnstore.inc
+--echo #
+--echo # MCOL-4648: Disallow casting to NULL marker values, allow casting to EMPTY ROW values.
+--echo #
+--echo # Defined in joblisttypes.h: UBIGINTNULL == 0xFFFFFFFFFFFFFFFEULL == 18446744073709551614
+--echo # Defined in joblisttypes.h: UBIGINTEMPTYROW == 0xFFFFFFFFFFFFFFFFULL == 18446744073709551615
+--echo #
+--disable_warnings
+DROP DATABASE IF EXISTS mcol_4648;
+--enable_warnings
+CREATE DATABASE mcol_4648;
+USE mcol_4648;
+CREATE TABLE t1 
+    (d1 DECIMAL(30,0), d2 DECIMAL(30,0) NOT NULL,
+     str1 TEXT, str2 TEXT NOT NULL,
+     double1 DOUBLE(30,0), double2 DOUBLE(30,0) NOT NULL) ENGINE=ColumnStore;
+INSERT INTO t1 VALUES 
+    (18446744073709551614, 18446744073709551614,
+    "18446744073709551614", "18446744073709551614",
+     18446744073709551614.0, 18446744073709551614.0);
+INSERT INTO t1 VALUES
+	(18446744073709551615, 18446744073709551615,
+	"18446744073709551615", "18446744073709551615",
+     18446744073709551615.0, 18446744073709551615.0);
+SELECT d1, CAST(d1 AS UNSIGNED), CAST(d2 AS UNSIGNED) FROM t1;
+SELECT str1, CAST(str1 AS UNSIGNED), CAST(str2 AS UNSIGNED) FROM t1;
+--echo # Doubles only store about 15 digits of precision for decimal places, therefore both inserted numbers
+--echo # are rounded to 18446744073709552000.0 and we expect them to be casted to EMPTYROW value each.
+SELECT double1, CAST(double1 AS UNSIGNED), CAST(double2 AS UNSIGNED) FROM t1;
+DROP DATABASE mcol_4648;