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NdbOperationSearch.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:20k
源码类别:
MySQL数据库
开发平台:
Visual C++
- /* Copyright (C) 2003 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /******************************************************************************
- Name: NdbOperationSearch.C
- Include:
- Link:
- Author: UABMNST Mona Natterkvist UAB/B/SD
- Date: 970829
- Version: 0.1
- Description: Interface between TIS and NDB
- Documentation:
- Adjust: 971022 UABMNST First version.
- 971206 UABRONM
- *****************************************************************************/
- #include "API.hpp"
- #include <NdbOperation.hpp>
- #include "NdbApiSignal.hpp"
- #include <NdbConnection.hpp>
- #include <Ndb.hpp>
- #include "NdbImpl.hpp"
- #include <NdbOut.hpp>
- #include <AttributeHeader.hpp>
- #include <signaldata/TcKeyReq.hpp>
- #include "NdbDictionaryImpl.hpp"
- /******************************************************************************
- CondIdType equal(const char* anAttrName, char* aValue, Uint32 aVarKeylen);
- Return Value Return 0 : Equal was successful.
- Return -1: In all other case.
- Parameters: anAttrName : Attribute name for search condition..
- aValue : Referense to the search value.
- aVariableKeylen : The length of key in bytes
- Remark: Defines search condition with equality anAttrName.
- ******************************************************************************/
- int
- NdbOperation::equal_impl(const NdbColumnImpl* tAttrInfo,
- const char* aValuePassed,
- Uint32 aVariableKeyLen)
- {
- register Uint32 tAttrId;
- Uint32 tData;
- Uint32 tKeyInfoPosition;
- const char* aValue = aValuePassed;
- Uint32 xfrmData[1024];
- Uint32 tempData[1024];
- if ((theStatus == OperationDefined) &&
- (aValue != NULL) &&
- (tAttrInfo != NULL )) {
- /******************************************************************************
- * Start by checking that the attribute is a tuple key.
- * This value is also the word order in the tuple key of this
- * tuple key attribute.
- * Then check that this tuple key has not already been defined.
- * Finally check if all tuple key attributes have been defined. If
- * this is true then set Operation state to tuple key defined.
- *****************************************************************************/
- tAttrId = tAttrInfo->m_attrId;
- tKeyInfoPosition = tAttrInfo->m_keyInfoPos;
- Uint32 i = 0;
- if (tAttrInfo->m_pk) {
- Uint32 tKeyDefined = theTupleKeyDefined[0][2];
- Uint32 tKeyAttrId = theTupleKeyDefined[0][0];
- do {
- if (tKeyDefined == false) {
- goto keyEntryFound;
- } else {
- if (tKeyAttrId != tAttrId) {
- /******************************************************************
- * We read the key defined variable in advance.
- * It could potentially read outside its area when
- * i = MAXNROFTUPLEKEY - 1,
- * it is not a problem as long as the variable
- * theTupleKeyDefined is defined
- * in the middle of the object.
- * Reading wrong data and not using it causes no problems.
- *****************************************************************/
- i++;
- tKeyAttrId = theTupleKeyDefined[i][0];
- tKeyDefined = theTupleKeyDefined[i][2];
- continue;
- } else {
- goto equal_error2;
- }//if
- }//if
- } while (i < NDB_MAX_NO_OF_ATTRIBUTES_IN_KEY);
- goto equal_error2;
- } else {
- goto equal_error1;
- }
- /*************************************************************************
- * Now it is time to retrieve the tuple key data from the pointer supplied
- * by the application.
- * We have to retrieve the size of the attribute in words and bits.
- *************************************************************************/
- keyEntryFound:
- theTupleKeyDefined[i][0] = tAttrId;
- theTupleKeyDefined[i][1] = tKeyInfoPosition;
- theTupleKeyDefined[i][2] = true;
- Uint32 sizeInBytes = tAttrInfo->m_attrSize * tAttrInfo->m_arraySize;
- {
- /***************************************************************************
- * Check if the pointer of the value passed is aligned on a 4 byte
- * boundary. If so only assign the pointer to the internal variable
- * aValue. If it is not aligned then we start by copying the value to
- * tempData and use this as aValue instead.
- *****************************************************************************/
- const int attributeSize = sizeInBytes;
- const int slack = sizeInBytes & 3;
- if ((((UintPtr)aValue & 3) != 0) || (slack != 0)){
- memcpy(&tempData[0], aValue, attributeSize);
- aValue = (char*)&tempData[0];
- if(slack != 0) {
- char * tmp = (char*)&tempData[0];
- memset(&tmp[attributeSize], 0, (4 - slack));
- }//if
- }//if
- }
- const char* aValueToWrite = aValue;
- CHARSET_INFO* cs = tAttrInfo->m_cs;
- if (cs != 0) {
- // current limitation: strxfrm does not increase length
- assert(cs->strxfrm_multiply <= 1);
- unsigned n =
- (*cs->coll->strnxfrm)(cs,
- (uchar*)xfrmData, sizeof(xfrmData),
- (const uchar*)aValue, sizeInBytes);
- while (n < sizeInBytes)
- ((uchar*)xfrmData)[n++] = 0x20;
- aValue = (char*)xfrmData;
- }
- Uint32 bitsInLastWord = 8 * (sizeInBytes & 3) ;
- Uint32 totalSizeInWords = (sizeInBytes + 3)/4; // Inc. bits in last word
- Uint32 sizeInWords = sizeInBytes / 4; // Exc. bits in last word
- if (true){ //tArraySize != 0) {
- Uint32 tTupKeyLen = theTupKeyLen;
- theTupKeyLen = tTupKeyLen + totalSizeInWords;
- if ((aVariableKeyLen == sizeInBytes) ||
- (aVariableKeyLen == 0)) {
- ;
- } else {
- goto equal_error3;
- }
- }
- #if 0
- else {
- /************************************************************************
- * The attribute is a variable array. We need to use the length parameter
- * to know the size of this attribute in the key information and
- * variable area. A key is however not allowed to be larger than 4
- * kBytes and this is checked for variable array attributes
- * used as keys.
- ************************************************************************/
- Uint32 tMaxVariableKeyLenInWord = (MAXTUPLEKEYLENOFATTERIBUTEINWORD -
- tKeyInfoPosition);
- tAttrSizeInBits = aVariableKeyLen << 3;
- tAttrSizeInWords = tAttrSizeInBits >> 5;
- tAttrBitsInLastWord = tAttrSizeInBits - (tAttrSizeInWords << 5);
- tAttrLenInWords = ((tAttrSizeInBits + 31) >> 5);
- if (tAttrLenInWords > tMaxVariableKeyLenInWord) {
- setErrorCodeAbort(4207);
- return -1;
- }//if
- theTupKeyLen = theTupKeyLen + tAttrLenInWords;
- }//if
- #endif
- int tDistrKey = tAttrInfo->m_distributionKey;
- int tDistrGroup = tAttrInfo->m_distributionGroup;
- OperationType tOpType = theOperationType;
- if ((tDistrKey != 1) && (tDistrGroup != 1)) {
- ;
- } else if (tDistrKey == 1) {
- theDistrKeySize += totalSizeInWords;
- theDistrKeyIndicator = 1;
- } else {
- Uint32 TsizeInBytes = sizeInBytes;
- Uint32 TbyteOrderFix = 0;
- char* TcharByteOrderFix = (char*)&TbyteOrderFix;
- if (tAttrInfo->m_distributionGroupBits == 8) {
- char tFirstChar = aValue[TsizeInBytes - 2];
- char tSecondChar = aValue[TsizeInBytes - 2];
- TcharByteOrderFix[0] = tFirstChar;
- TcharByteOrderFix[1] = tSecondChar;
- TcharByteOrderFix[2] = 0x30;
- TcharByteOrderFix[3] = 0x30;
- theDistrGroupType = 0;
- } else {
- TbyteOrderFix = ((aValue[TsizeInBytes - 2] - 0x30) * 10)
- + (aValue[TsizeInBytes - 1] - 0x30);
- theDistrGroupType = 1;
- }//if
- theDistributionGroup = TbyteOrderFix;
- theDistrGroupIndicator = 1;
- }//if
- /******************************************************************************
- * If the operation is an insert request and the attribute is stored then
- * we also set the value in the stored part through putting the
- * information in the ATTRINFO signals.
- *****************************************************************************/
- if ((tOpType == InsertRequest) ||
- (tOpType == WriteRequest)) {
- if (!tAttrInfo->m_indexOnly){
- int dummy_error;
- // invalid data can crash kernel
- if (cs != NULL &&
- (*cs->cset->well_formed_len)(cs,
- aValueToWrite,
- aValueToWrite + sizeInBytes,
- sizeInBytes,
- &dummy_error) != sizeInBytes)
- goto equal_error4;
- Uint32 ahValue;
- const Uint32 sz = totalSizeInWords;
- AttributeHeader::init(&ahValue, tAttrId, sz);
- insertATTRINFO( ahValue );
- insertATTRINFOloop((Uint32*)aValueToWrite, sizeInWords);
- if (bitsInLastWord != 0) {
- tData = *(Uint32*)(aValueToWrite + (sizeInWords << 2));
- tData = convertEndian(tData);
- tData = tData & ((1 << bitsInLastWord) - 1);
- tData = convertEndian(tData);
- insertATTRINFO( tData );
- }//if
- }//if
- }//if
- /***************************************************************************
- * Store the Key information in the TCKEYREQ and KEYINFO signals.
- **************************************************************************/
- if (insertKEYINFO(aValue, tKeyInfoPosition,
- totalSizeInWords, bitsInLastWord) != -1) {
- /*************************************************************************
- * Add one to number of tuple key attributes defined.
- * If all have been defined then set the operation state to indicate
- * that tuple key is defined.
- * Thereby no more search conditions are allowed in this version.
- ************************************************************************/
- Uint32 tNoKeysDef = theNoOfTupKeyDefined;
- Uint32 tErrorLine = theErrorLine;
- int tNoTableKeys = m_currentTable->m_noOfKeys;
- unsigned char tInterpretInd = theInterpretIndicator;
- tNoKeysDef++;
- theNoOfTupKeyDefined = tNoKeysDef;
- tErrorLine++;
- theErrorLine = tErrorLine;
- if (int(tNoKeysDef) == tNoTableKeys) {
- if (tOpType == UpdateRequest) {
- if (tInterpretInd == 1) {
- theStatus = GetValue;
- } else {
- theStatus = SetValue;
- }//if
- return 0;
- } else if ((tOpType == ReadRequest) || (tOpType == DeleteRequest) ||
- (tOpType == ReadExclusive)) {
- theStatus = GetValue;
- // create blob handles automatically
- if (tOpType == DeleteRequest && m_currentTable->m_noOfBlobs != 0) {
- for (unsigned i = 0; i < m_currentTable->m_columns.size(); i++) {
- NdbColumnImpl* c = m_currentTable->m_columns[i];
- assert(c != 0);
- if (c->getBlobType()) {
- if (getBlobHandle(theNdbCon, c) == NULL)
- return -1;
- }
- }
- }
- return 0;
- } else if ((tOpType == InsertRequest) || (tOpType == WriteRequest)) {
- theStatus = SetValue;
- return 0;
- } else {
- setErrorCodeAbort(4005);
- return -1;
- }//if
- }//if
- return 0;
- } else {
- return -1;
- }//if
- }
- if (aValue == NULL) {
- // NULL value in primary key
- setErrorCodeAbort(4505);
- return -1;
- }//if
- if ( tAttrInfo == NULL ) {
- // Attribute name not found in table
- setErrorCodeAbort(4004);
- return -1;
- }//if
- if (theStatus == GetValue || theStatus == SetValue){
- // All pk's defined
- setErrorCodeAbort(4225);
- return -1;
- }//if
- // If we come here, set a general errorcode
- // and exit
- setErrorCodeAbort(4200);
- return -1;
- equal_error1:
- setErrorCodeAbort(4205);
- return -1;
- equal_error2:
- setErrorCodeAbort(4206);
- return -1;
- equal_error3:
- setErrorCodeAbort(4209);
- return -1;
- equal_error4:
- setErrorCodeAbort(744);
- return -1;
- }
- /******************************************************************************
- * Uint64 setTupleId( void )
- *
- * Return Value: Return > 0: OK
- * Return 0 : setTupleId failed
- * Parameters:
- * Remark:
- *****************************************************************************/
- Uint64
- NdbOperation::setTupleId()
- {
- if (theStatus != OperationDefined)
- {
- return 0;
- }
- Uint64 tTupleId = theNdb->getTupleIdFromNdb(m_currentTable->m_tableId);
- if (tTupleId == ~(Uint64)0){
- setErrorCodeAbort(theNdb->theError.code);
- return 0;
- }
- if (equal((Uint32)0, tTupleId) == -1)
- return 0;
- return tTupleId;
- }
- /******************************************************************************
- * int insertKEYINFO(const char* aValue, aStartPosition,
- * anAttrSizeInWords, Uint32 anAttrBitsInLastWord);
- *
- * Return Value: Return 0 : insertKEYINFO was succesful.
- * Return -1: In all other case.
- * Parameters: aValue: the data to insert into KEYINFO.
- * aStartPosition : Start position for Tuplekey in
- * KEYINFO (TCKEYREQ).
- * aKeyLenInByte : Length of tuplekey or part of tuplekey
- * anAttrBitsInLastWord : Nr of bits in last word.
- * Remark: Puts the the data into either TCKEYREQ signal
- * or KEYINFO signal.
- *****************************************************************************/
- int
- NdbOperation::insertKEYINFO(const char* aValue,
- register Uint32 aStartPosition,
- register Uint32 anAttrSizeInWords,
- register Uint32 anAttrBitsInLastWord)
- {
- NdbApiSignal* tSignal;
- NdbApiSignal* tCurrentKEYINFO;
- //register NdbApiSignal* tTCREQ = theTCREQ;
- register Uint32 tAttrPos;
- Uint32 tPosition;
- Uint32 tEndPos;
- Uint32 tPos;
- Uint32 signalCounter;
- Uint32 tData;
- /*****************************************************************************
- * Calculate the end position of the attribute in the key information. *
- * Since the first attribute starts at position one we need to subtract *
- * one to get the correct end position. *
- * We must also remember the last word with only partial information. *
- *****************************************************************************/
- tEndPos = aStartPosition + anAttrSizeInWords - 1;
- if ((tEndPos < 9) && (anAttrBitsInLastWord == 0)) {
- register Uint32 tkeyData = *(Uint32*)aValue;
- //TcKeyReq* tcKeyReq = CAST_PTR(TcKeyReq, tTCREQ->getDataPtrSend());
- register Uint32* tDataPtr = (Uint32*)aValue;
- tAttrPos = 1;
- register Uint32* tkeyDataPtr = theKEYINFOptr + aStartPosition - 1;
- // (Uint32*)&tcKeyReq->keyInfo[aStartPosition - 1];
- do {
- tDataPtr++;
- *tkeyDataPtr = tkeyData;
- if (tAttrPos < anAttrSizeInWords) {
- ;
- } else {
- return 0;
- }//if
- tkeyData = *tDataPtr;
- tkeyDataPtr++;
- tAttrPos++;
- } while (1);
- return 0;
- }//if
- /*****************************************************************************
- * Allocate all the KEYINFO signals needed for this key before starting *
- * to fill the signals with data. This simplifies error handling and *
- * avoids duplication of code. *
- *****************************************************************************/
- tAttrPos = 0;
- signalCounter = 1;
- while(tEndPos > theTotalNrOfKeyWordInSignal)
- {
- tSignal = theNdb->getSignal();
- if (tSignal == NULL)
- {
- setErrorCodeAbort(4000);
- return -1;
- }
- if (tSignal->setSignal(m_keyInfoGSN) == -1)
- {
- setErrorCodeAbort(4001);
- return -1;
- }
- if (theFirstKEYINFO != NULL)
- theLastKEYINFO->next(tSignal);
- else
- theFirstKEYINFO = tSignal;
- theLastKEYINFO = tSignal;
- theLastKEYINFO->next(NULL);
- theTotalNrOfKeyWordInSignal += 20;
- }
- /*****************************************************************************
- * Change to variable tPosition for more appropriate naming of rest of *
- * the code. We must set up current KEYINFO already here if the last *
- * word is a word which is set at LastWordLabel and at the same time *
- * this is the first word in a KEYINFO signal. *
- *****************************************************************************/
- tPosition = aStartPosition;
- tCurrentKEYINFO = theFirstKEYINFO;
- /*****************************************************************************
- * Start by filling up Key information in the 8 words allocated in the *
- * TC[KEY/INDX]REQ signal. *
- *****************************************************************************/
- while (tPosition < 9)
- {
- theKEYINFOptr[tPosition-1] = * (Uint32*)(aValue + (tAttrPos << 2));
- tAttrPos++;
- if (anAttrSizeInWords == tAttrPos)
- goto LastWordLabel;
- tPosition++;
- }
- /*****************************************************************************
- * We must set up the start position of the writing of Key information *
- * before we start the writing of KEYINFO signals. If the start is not *
- * the first word of the first KEYINFO signals then we must step forward*
- * to the proper KEYINFO signal and set the signalCounter properly. *
- * signalCounter is set to the actual position in the signal ( = 4 for *
- * first key word in KEYINFO signal. *
- *****************************************************************************/
- tPos = 8;
- while ((tPosition - tPos) > 20)
- {
- tCurrentKEYINFO = tCurrentKEYINFO->next();
- tPos += 20;
- }
- signalCounter = tPosition - tPos + 3;
- /*****************************************************************************
- * The loop that actually fills in the Key information into the KEYINFO *
- * signals. Can be optimised by writing larger chunks than 4 bytes at a *
- * time. *
- *****************************************************************************/
- do
- {
- if (signalCounter > 23)
- {
- tCurrentKEYINFO = tCurrentKEYINFO->next();
- signalCounter = 4;
- }
- tCurrentKEYINFO->setData(*(Uint32*)(aValue + (tAttrPos << 2)),
- signalCounter);
- tAttrPos++;
- if (anAttrSizeInWords == tAttrPos)
- goto LastWordLabel;
- tPosition++;
- signalCounter++;
- } while (1);
- LastWordLabel:
- /*****************************************************************************
- * There could be a last word that only contains partial data. This word*
- * will contain zeroes in the rest of the bits since the index expects *
- * a certain number of words and do not care for parts of words. *
- *****************************************************************************/
- if (anAttrBitsInLastWord != 0) {
- tData = *(Uint32*)(aValue + (anAttrSizeInWords - 1) * 4);
- tData = convertEndian(tData);
- tData = tData & ((1 << anAttrBitsInLastWord) - 1);
- tData = convertEndian(tData);
- if (tPosition > 8) {
- tCurrentKEYINFO->setData(tData, signalCounter);
- signalCounter++;
- } else {
- theTCREQ->setData(tData, (12 + tPosition));
- }//if
- }//if
- return 0;
- }
- int
- NdbOperation::getKeyFromTCREQ(Uint32* data, unsigned size)
- {
- assert(m_accessTable != 0 && m_accessTable->m_sizeOfKeysInWords != 0);
- assert(m_accessTable->m_sizeOfKeysInWords == size);
- unsigned pos = 0;
- while (pos < 8 && pos < size) {
- data[pos] = theKEYINFOptr[pos];
- pos++;
- }
- NdbApiSignal* tSignal = theFirstKEYINFO;
- unsigned n = 0;
- while (pos < size) {
- if (n == 20) {
- tSignal = tSignal->next();
- n = 0;
- }
- data[pos++] = tSignal->getDataPtrSend()[3 + n++];
- }
- return 0;
- }