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Licensed Materials - Property of IBM
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DB2 Storage Engine Enablement
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Copyright IBM Corporation 2007,2008
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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(a) Redistributions of source code must retain this list of conditions, the
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copyright notice in section {d} below, and the disclaimer following this
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(b) Redistributions in binary form must reproduce this list of conditions, the
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copyright notice in section (d) below, and the disclaimer following this
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list of conditions, in the documentation and/or other materials provided
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with the distribution.
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(c) The name of IBM may not be used to endorse or promote products derived from
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this software without specific prior written permission.
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(d) The text of the required copyright notice is:
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Licensed Materials - Property of IBM
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DB2 Storage Engine Enablement
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Copyright IBM Corporation 2007,2008
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THIS SOFTWARE IS PROVIDED BY IBM CORPORATION "AS IS" AND ANY EXPRESS OR IMPLIED
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WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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SHALL IBM CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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#define MYSQL_SERVER 1
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#include "my_global.h"
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const uint MAX_DB2_KEY_PARTS=120;
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const int MAX_DB2_V5R4_LIBNAME_LENGTH = 10;
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const int MAX_DB2_V6R1_LIBNAME_LENGTH = 30;
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const int MAX_DB2_SCHEMANAME_LENGTH=258;
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const int MAX_DB2_FILENAME_LENGTH=258;
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const int MAX_DB2_COLNAME_LENGTH=128;
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const int MAX_DB2_SAVEPOINTNAME_LENGTH=128;
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const int MAX_DB2_QUALIFIEDNAME_LENGTH=MAX_DB2_V6R1_LIBNAME_LENGTH + 1 + MAX_DB2_FILENAME_LENGTH;
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const uint32 MAX_CHAR_LENGTH = 32765;
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const uint32 MAX_VARCHAR_LENGTH = 32739;
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const uint32 MAX_DEC_PRECISION = 63;
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const uint32 MAX_BLOB_LENGTH = 2147483646;
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const uint32 MAX_BINARY_LENGTH = MAX_CHAR_LENGTH;
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const uint32 MAX_VARBINARY_LENGTH = MAX_VARCHAR_LENGTH;
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const uint32 MAX_FULL_ALLOCATE_BLOB_LENGTH = 65536;
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const uint32 MAX_FOREIGN_LEN = 64000;
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const char* DB2I_TEMP_TABLE_SCHEMA = "QTEMP";
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const char DB2I_ADDL_INDEX_NAME_DELIMITER[5] = {'_','_','_','_','_'};
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const char DB2I_DEFAULT_INDEX_NAME_DELIMITER[3] = {'_','_','_'};
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const int DB2I_INDEX_NAME_LENGTH_TO_PRESERVE = 110;
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enum enum_DB2I_INDEX_TYPE
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void* roundToQuadWordBdy(void* ptr)
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return (void*)(((uint64)(ptr)+0xf) & ~0xf);
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typedef uint64_t ILEMemHandle;
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extern OSVersion osVersion;
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Allocate 16-byte aligned space using the MySQL heap allocator
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@details Many of the spaces used by the QMY_* APIS are required to be
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aligned on 16 byte boundaries. The standard system malloc will do this
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alignment by default. However, in order to use the heap debug and tracking
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features of the mysql allocator, we chose to implement an aligning wrapper
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around my_malloc. Essentially, we overallocate the storage space, find the
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first aligned address in the space, store a pointer to the true malloc
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allocation in the bytes immediately preceding the aligned address, and return
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the aligned address to the caller.
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@parm size The size of heap storage needed
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@return A 16-byte aligned pointer to the storage requested.
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void* malloc_aligned(size_t size)
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base = (char*)my_malloc(size + sizeof(void*) + 15, MYF(MY_WME));
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p = (char*)roundToQuadWordBdy(base + sizeof(void*));
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char** p2 = (char**)(p - sizeof(void*));
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Free a 16-byte aligned space alloced by malloc_aligned
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@details We know that a pointer to the true malloced storage immediately
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precedes the aligned address, so we pull that out and call my_free().
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@parm p A 16-byte aligned pointer generated by malloc_aligned
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void free_aligned(void* p)
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my_free(*(char**)((char*)p-sizeof(void*)), MYF(0));