lang_cmd.cpp
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上传日期:2007-06-13
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- /*
- * ===========================================================================
- * PRODUCTION $Log: lang_cmd.cpp,v $
- * PRODUCTION Revision 1000.1 2004/06/01 19:20:19 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.14
- * PRODUCTION
- * ===========================================================================
- */
- /* $Id: lang_cmd.cpp,v 1000.1 2004/06/01 19:20:19 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's official duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- *
- * Author: Vladimir Soussov
- *
- * File Description: DBLib language command
- *
- */
- #include <ncbi_pch.hpp>
- #ifndef USE_MS_DBLIB
- # include <dbapi/driver/dblib/interfaces.hpp>
- # include <dbapi/driver/dblib/interfaces_p.hpp>
- #else
- # include <dbapi/driver/msdblib/interfaces.hpp>
- # include <dbapi/driver/msdblib/interfaces_p.hpp>
- #endif
- BEGIN_NCBI_SCOPE
- /////////////////////////////////////////////////////////////////////////////
- //
- // CDBL_LangCmd::
- //
- CDBL_LangCmd::CDBL_LangCmd(CDBL_Connection* conn, DBPROCESS* cmd,
- const string& lang_query,
- unsigned int nof_params) :
- m_Connect(conn), m_Cmd(cmd), m_Query(lang_query), m_Params(nof_params)
- {
- m_WasSent = false;
- m_HasFailed = false;
- m_Res = 0;
- m_RowCount = -1;
- m_Status = 0;
- }
- bool CDBL_LangCmd::More(const string& query_text)
- {
- m_Query.append(query_text);
- return true;
- }
- bool CDBL_LangCmd::BindParam(const string& param_name, CDB_Object* param_ptr)
- {
- return
- m_Params.BindParam(CDB_Params::kNoParamNumber, param_name, param_ptr);
- }
- bool CDBL_LangCmd::SetParam(const string& param_name, CDB_Object* param_ptr)
- {
- return
- m_Params.SetParam(CDB_Params::kNoParamNumber, param_name, param_ptr);
- }
- bool CDBL_LangCmd::Send()
- {
- if (m_WasSent)
- Cancel();
- m_HasFailed = false;
- if (!x_AssignParams()) {
- dbfreebuf(m_Cmd);
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Error, 220003, "CDBL_LangCmd::Send",
- "cannot assign params");
- }
- if (dbcmd(m_Cmd, (char*)(m_Query.c_str())) != SUCCEED) {
- dbfreebuf(m_Cmd);
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Fatal, 220001, "CDBL_LangCmd::Send",
- "dbcmd failed");
- }
- if (dbsqlsend(m_Cmd) != SUCCEED) {
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Error, 220005, "CDBL_LangCmd::Send",
- "dbsqlsend failed");
- }
- m_WasSent = true;
- m_Status = 0;
- return true;
- }
- bool CDBL_LangCmd::WasSent() const
- {
- return m_WasSent;
- }
- bool CDBL_LangCmd::Cancel()
- {
- if (m_WasSent) {
- if (m_Res) {
- delete m_Res;
- m_Res = 0;
- }
- m_WasSent = false;
- return (dbcancel(m_Cmd) == SUCCEED);
- }
- dbfreebuf(m_Cmd);
- m_Query.erase();
- return true;
- }
- bool CDBL_LangCmd::WasCanceled() const
- {
- return !m_WasSent;
- }
- CDB_Result* CDBL_LangCmd::Result()
- {
- if (m_Res) {
- if(m_RowCount < 0) {
- m_RowCount = DBCOUNT(m_Cmd);
- }
- delete m_Res;
- m_Res = 0;
- }
- if (!m_WasSent) {
- throw CDB_ClientEx(eDB_Error, 220010, "CDBL_LangCmd::Result",
- "a command has to be sent first");
- }
- if (m_Status == 0) {
- m_Status = 0x1;
- if (dbsqlok(m_Cmd) != SUCCEED) {
- m_WasSent = false;
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Error, 220011, "CDBL_LangCmd::Result",
- "dbsqlok failed");
- }
- }
- if ((m_Status & 0x10) != 0) { // we do have a compute result
- m_Res = new CDBL_ComputeResult(m_Cmd, &m_Status);
- m_RowCount= 1;
- return Create_Result(*m_Res);
- }
- while ((m_Status & 0x1) != 0) {
- if ((m_Status & 0x20) != 0) { // check for return parameters from exec
- m_Status ^= 0x20;
- int n;
- if ((n = dbnumrets(m_Cmd)) > 0) {
- m_Res = new CDBL_ParamResult(m_Cmd, n);
- m_RowCount= 1;
- return Create_Result(*m_Res);
- }
- }
- if ((m_Status & 0x40) != 0) { // check for ret status
- m_Status ^= 0x40;
- if (dbhasretstat(m_Cmd)) {
- m_Res = new CDBL_StatusResult(m_Cmd);
- m_RowCount= 1;
- return Create_Result(*m_Res);
- }
- }
- switch (dbresults(m_Cmd)) {
- case SUCCEED:
- m_Status |= 0x60;
- if (DBCMDROW(m_Cmd) == SUCCEED) { // we could get rows in result
- // This optimization is currently unavailable for MS dblib...
- #ifndef MS_DBLIB_IN_USE /*Text,Image*/
- if (dbnumcols(m_Cmd) == 1) {
- int ct = dbcoltype(m_Cmd, 1);
- if ((ct == SYBTEXT) || (ct == SYBIMAGE)) {
- m_Res = new CDBL_BlobResult(m_Cmd);
- }
- }
- #endif
- if (!m_Res)
- m_Res = new CDBL_RowResult(m_Cmd, &m_Status);
- m_RowCount= -1;
- return Create_Result(*m_Res);
- } else {
- m_RowCount = DBCOUNT(m_Cmd);
- continue;
- }
- case NO_MORE_RESULTS:
- m_Status = 2;
- break;
- default:
- m_HasFailed = true;
- throw CDB_ClientEx(eDB_Warning, 220016, "CDBL_LangCmd::Result",
- "an error was encountered by server");
- }
- break;
- }
- m_WasSent = false;
- return 0;
- }
- bool CDBL_LangCmd::HasMoreResults() const
- {
- return m_WasSent;
- }
- void CDBL_LangCmd::DumpResults()
- {
- CDB_Result* dbres;
- while(m_WasSent) {
- dbres= Result();
- if(dbres) {
- if(m_Connect->m_ResProc) {
- m_Connect->m_ResProc->ProcessResult(*dbres);
- }
- else {
- while(dbres->Fetch());
- }
- delete dbres;
- }
- }
- }
- bool CDBL_LangCmd::HasFailed() const
- {
- return m_HasFailed;
- }
- int CDBL_LangCmd::RowCount() const
- {
- return (m_RowCount < 0)? DBCOUNT(m_Cmd) : m_RowCount;
- }
- void CDBL_LangCmd::Release()
- {
- m_BR = 0;
- if (m_WasSent) {
- Cancel();
- m_WasSent = false;
- }
- m_Connect->DropCmd(*this);
- delete this;
- }
- CDBL_LangCmd::~CDBL_LangCmd()
- {
- if (m_BR)
- *m_BR = 0;
- if (m_WasSent)
- Cancel();
- }
- bool CDBL_LangCmd::x_AssignParams()
- {
- static const char s_hexnum[] = "0123456789ABCDEF";
- for (unsigned int n = 0; n < m_Params.NofParams(); n++) {
- if(m_Params.GetParamStatus(n) == 0) continue;
- const string& name = m_Params.GetParamName(n);
- CDB_Object& param = *m_Params.GetParam(n);
- char val_buffer[1024];
- const char* type;
- string cmd;
- if (name.length() > kDBLibMaxNameLen)
- return false;
- switch (param.GetType()) {
- case eDB_Int:
- type = "int";
- break;
- case eDB_SmallInt:
- type = "smallint";
- break;
- case eDB_TinyInt:
- type = "tinyint";
- break;
- case eDB_BigInt:
- type = "numeric";
- break;
- case eDB_Char:
- case eDB_VarChar:
- type = "varchar(255)";
- break;
- case eDB_Binary:
- case eDB_VarBinary:
- type = "varbinary(255)";
- break;
- case eDB_Float:
- type = "real";
- break;
- case eDB_Double:
- type = "float";
- break;
- case eDB_SmallDateTime:
- type = "smalldatetime";
- break;
- case eDB_DateTime:
- type = "datetime";
- break;
- default:
- return false;
- }
- cmd += "declare " + name + ' ' + type + "nselect " + name + " = ";
- if (!param.IsNULL()) {
- switch (param.GetType()) {
- case eDB_Int: {
- CDB_Int& val = dynamic_cast<CDB_Int&> (param);
- sprintf(val_buffer, "%dn", val.Value());
- break;
- }
- case eDB_SmallInt: {
- CDB_SmallInt& val = dynamic_cast<CDB_SmallInt&> (param);
- sprintf(val_buffer, "%dn", (int) val.Value());
- break;
- }
- case eDB_TinyInt: {
- CDB_TinyInt& val = dynamic_cast<CDB_TinyInt&> (param);
- sprintf(val_buffer, "%dn", (int) val.Value());
- break;
- }
- case eDB_BigInt: {
- CDB_BigInt& val = dynamic_cast<CDB_BigInt&> (param);
- sprintf(val_buffer, "%lldn", val.Value());
- break;
- }
- case eDB_Char: {
- CDB_Char& val = dynamic_cast<CDB_Char&> (param);
- const char* c = val.Value(); // No more than 255 chars
- size_t i = 0;
- val_buffer[i++] = '"';
- while (*c) {
- if (*c == '"')
- val_buffer[i++] = '"';
- val_buffer[i++] = *c++;
- }
- val_buffer[i++] = '"';
- val_buffer[i++] = 'n';
- val_buffer[i] = ' ';
- break;
- }
- case eDB_VarChar: {
- CDB_VarChar& val = dynamic_cast<CDB_VarChar&> (param);
- const char* c = val.Value();
- size_t i = 0;
- val_buffer[i++] = '"';
- while (*c) {
- if (*c == '"')
- val_buffer[i++] = '"';
- val_buffer[i++] = *c++;
- }
- val_buffer[i++] = '"';
- val_buffer[i++] = 'n';
- val_buffer[i] = ' ';
- break;
- }
- case eDB_Binary: {
- CDB_Binary& val = dynamic_cast<CDB_Binary&> (param);
- const unsigned char* c = (const unsigned char*) val.Value();
- size_t i = 0, size = val.Size();
- val_buffer[i++] = '0';
- val_buffer[i++] = 'x';
- for (size_t j = 0; j < size; j++) {
- val_buffer[i++] = s_hexnum[c[j] >> 4];
- val_buffer[i++] = s_hexnum[c[j] & 0x0F];
- }
- val_buffer[i++] = 'n';
- val_buffer[i++] = ' ';
- break;
- }
- case eDB_VarBinary: {
- CDB_VarBinary& val = dynamic_cast<CDB_VarBinary&> (param);
- const unsigned char* c = (const unsigned char*) val.Value();
- size_t i = 0, size = val.Size();
- val_buffer[i++] = '0';
- val_buffer[i++] = 'x';
- for (size_t j = 0; j < size; j++) {
- val_buffer[i++] = s_hexnum[c[j] >> 4];
- val_buffer[i++] = s_hexnum[c[j] & 0x0F];
- }
- val_buffer[i++] = 'n';
- val_buffer[i++] = ' ';
- break;
- }
- case eDB_Float: {
- CDB_Float& val = dynamic_cast<CDB_Float&> (param);
- sprintf(val_buffer, "%En", (double) val.Value());
- break;
- }
- case eDB_Double: {
- CDB_Double& val = dynamic_cast<CDB_Double&> (param);
- sprintf(val_buffer, "%En", val.Value());
- break;
- }
- case eDB_SmallDateTime: {
- CDB_SmallDateTime& val =
- dynamic_cast<CDB_SmallDateTime&> (param);
- sprintf(val_buffer, "'%s'n",
- val.Value().AsString("M/D/Y h:m").c_str());
- break;
- }
- case eDB_DateTime: {
- CDB_DateTime& val =
- dynamic_cast<CDB_DateTime&> (param);
- sprintf(val_buffer, "'%s:%.3d'n",
- val.Value().AsString("M/D/Y h:m:s").c_str(),
- (int)(val.Value().NanoSecond()/1000000));
- break;
- }
- default:
- return false; // dummy for compiler
- }
- cmd += val_buffer;
- } else
- cmd += "NULLn";
- if (dbcmd(m_Cmd, (char*) cmd.c_str()) != SUCCEED)
- return false;
- }
- return true;
- }
- END_NCBI_SCOPE
- /*
- * ===========================================================================
- * $Log: lang_cmd.cpp,v $
- * Revision 1000.1 2004/06/01 19:20:19 gouriano
- * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.14
- *
- * Revision 1.14 2004/05/18 18:30:36 gorelenk
- * PCH <ncbi_pch.hpp> moved to correct place .
- *
- * Revision 1.13 2003/06/05 16:01:13 soussov
- * adds code for DumpResults and for the dumped results processing
- *
- * Revision 1.12 2003/05/16 20:25:20 soussov
- * adds code to skip parameter if it was not set
- *
- * Revision 1.11 2002/07/22 20:02:59 soussov
- * fixes the RowCount calculations
- *
- * Revision 1.10 2002/07/02 16:05:49 soussov
- * splitting Sybase dblib and MS dblib
- *
- * Revision 1.9 2002/01/11 20:11:43 vakatov
- * Fixed CVS logs from prev. revision that messed up the compilation
- *
- * Revision 1.8 2002/01/10 22:05:52 sapojnik
- * MS-specific workarounds needed to use blobs via I_ITDescriptor
- * (see Text,Image)
- *
- * Revision 1.7 2002/01/08 18:10:18 sapojnik
- * Syabse to MSSQL name translations moved to interface_p.hpp
- *
- * Revision 1.6 2001/12/18 19:29:22 soussov
- * adds conversion from nanosecs to milisecs for datetime args
- *
- * Revision 1.5 2001/12/18 17:56:53 soussov
- * copy-paste bug in datetime processing fixed
- *
- * Revision 1.4 2001/12/18 16:47:11 soussov
- * fixes bug in datetime argument processing
- *
- * Revision 1.3 2001/12/13 23:48:44 soussov
- * inserts space after declare
- *
- * Revision 1.2 2001/10/24 16:41:13 lavr
- * File description changed to be of the same style as in other files
- *
- * Revision 1.1 2001/10/22 15:19:55 lavr
- * This is a major revamp (by Anton Lavrentiev, with help from Vladimir
- * Soussov and Denis Vakatov) of the DBAPI "driver" libs originally
- * written by Vladimir Soussov. The revamp follows the one of CTLib
- * driver, and it involved massive code shuffling and grooming, numerous
- * local API redesigns, adding comments and incorporating DBAPI to
- * the C++ Toolkit.
- *
- * ===========================================================================
- */