Code_expr_param.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:8k
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 */
- #include "Code_expr_param.hpp"
- #include "Code_root.hpp"
- // Plan_expr_param
- Plan_expr_param::~Plan_expr_param()
- {
- }
- Plan_base*
- Plan_expr_param::analyze(Ctx& ctx, Ctl& ctl)
- {
- m_exec = 0;
- ctx_assert(m_paramNumber != 0);
- ctx_assert(m_paramNumber < m_root->m_paramList.size());
- m_root->m_paramList[m_paramNumber] = this;
- m_sqlType.setType(ctx, SqlType::Unbound);
- // check if type is bound now
- DescArea& ipd = descArea(Desc_usage_IPD);
- if (m_paramNumber <= ipd.getCount()) {
- DescRec& rec = ipd.getRecord(m_paramNumber);
- OdbcData descData;
- rec.getField(ctx, SQL_DESC_TYPE, descData);
- if (descData.type() != OdbcData::Undef) {
- SQLSMALLINT desc_TYPE = descData.smallint();
- // XXX wrong but fixes sun.jdbc.odbc
- if (desc_TYPE == SQL_CHAR)
- desc_TYPE = SQL_VARCHAR;
- if (desc_TYPE == SQL_CHAR) {
- rec.getField(ctx, SQL_DESC_LENGTH, descData);
- if (descData.type() != OdbcData::Undef) {
- unsigned desc_LENGTH = descData.uinteger();
- m_sqlType.setType(ctx, SqlType::Char, desc_LENGTH);
- }
- } else if (desc_TYPE == SQL_VARCHAR) {
- rec.getField(ctx, SQL_DESC_LENGTH, descData);
- if (descData.type() != OdbcData::Undef) {
- unsigned desc_LENGTH = descData.uinteger();
- m_sqlType.setType(ctx, SqlType::Varchar, desc_LENGTH);
- }
- } else if (desc_TYPE == SQL_BINARY) {
- rec.getField(ctx, SQL_DESC_LENGTH, descData);
- if (descData.type() != OdbcData::Undef) {
- unsigned desc_LENGTH = descData.uinteger();
- m_sqlType.setType(ctx, SqlType::Binary, desc_LENGTH);
- }
- } else if (desc_TYPE == SQL_VARBINARY) {
- rec.getField(ctx, SQL_DESC_LENGTH, descData);
- if (descData.type() != OdbcData::Undef) {
- unsigned desc_LENGTH = descData.uinteger();
- m_sqlType.setType(ctx, SqlType::Varbinary, desc_LENGTH);
- } else {
- // XXX BLOB hack
- unsigned desc_LENGTH = FAKE_BLOB_SIZE;
- m_sqlType.setType(ctx, SqlType::Varbinary, desc_LENGTH);
- }
- } else if (desc_TYPE == SQL_SMALLINT) {
- m_sqlType.setType(ctx, SqlType::Smallint);
- } else if (desc_TYPE == SQL_INTEGER) {
- m_sqlType.setType(ctx, SqlType::Integer);
- } else if (desc_TYPE == SQL_BIGINT) {
- m_sqlType.setType(ctx, SqlType::Bigint);
- } else if (desc_TYPE == SQL_REAL) {
- m_sqlType.setType(ctx, SqlType::Real);
- } else if (desc_TYPE == SQL_DOUBLE) {
- m_sqlType.setType(ctx, SqlType::Double);
- } else if (desc_TYPE == SQL_TYPE_TIMESTAMP) {
- m_sqlType.setType(ctx, SqlType::Datetime);
- // XXX BLOB hack
- } else if (desc_TYPE == SQL_LONGVARBINARY) {
- m_sqlType.setType(ctx, SqlType::Varbinary, (unsigned)FAKE_BLOB_SIZE);
- } else {
- ctx.pushStatus(Error::Gen, "parameter %u unsupported SQL type %d", m_paramNumber, (int)desc_TYPE);
- return 0;
- }
- char buf[100];
- m_sqlType.print(buf, sizeof(buf));
- ctx_log2(("parameter %u SQL type bound to %s", m_paramNumber, buf));
- }
- }
- return this;
- }
- void
- Plan_expr_param::describe(Ctx& ctx)
- {
- DescArea& ipd = descArea(Desc_usage_IPD);
- if (ipd.getCount() < m_paramNumber)
- ipd.setCount(ctx, m_paramNumber);
- // XXX describe if possible
- DescRec& rec = ipd.getRecord(m_paramNumber);
- }
- Exec_base*
- Plan_expr_param::codegen(Ctx& ctx, Ctl& ctl)
- {
- if (m_exec != 0)
- return m_exec;
- SqlSpec sqlSpec(m_sqlType, SqlSpec::Physical);
- // create code
- Exec_expr_param* exec = new Exec_expr_param(ctl.m_execRoot);
- ctl.m_execRoot->saveNode(exec);
- ctx_assert(m_paramNumber != 0);
- Exec_expr_param::Code& code = *new Exec_expr_param::Code(sqlSpec, m_paramNumber);
- exec->setCode(code);
- m_exec = exec;
- return exec;
- }
- void
- Plan_expr_param::print(Ctx& ctx)
- {
- ctx.print(" [param %u]", m_paramNumber);
- }
- bool
- Plan_expr_param::isEqual(const Plan_expr* expr) const
- {
- ctx_assert(expr != 0);
- if (expr->type() != Plan_expr::TypeParam)
- return false;
- const Plan_expr_param* expr2 = static_cast<const Plan_expr_param*>(expr);
- // params are not equal ever
- return false;
- }
- bool
- Plan_expr_param::isGroupBy(const Plan_expr_row* row) const
- {
- // params are constants
- return true;
- }
- // Exec_expr_param
- Exec_expr_param::Code::~Code()
- {
- }
- Exec_expr_param::Data::~Data()
- {
- delete m_extField;
- m_extField = 0;
- }
- Exec_expr_param::~Exec_expr_param()
- {
- }
- void
- Exec_expr_param::alloc(Ctx& ctx, Ctl& ctl)
- {
- if (m_data != 0)
- return;
- const Code& code = getCode();
- SqlField sqlField(code.sqlSpec());
- Data& data = *new Data(sqlField);
- setData(data);
- }
- void
- Exec_expr_param::bind(Ctx& ctx)
- {
- const Code& code = getCode();
- Data& data = getData();
- DescArea& apd = descArea(Desc_usage_APD);
- if (apd.getCount() < code.m_paramNumber) {
- ctx_log1(("parameter %u is not bound", code.m_paramNumber));
- return;
- }
- const unsigned paramNumber = code.m_paramNumber;
- DescRec& rec = apd.getRecord(paramNumber);
- OdbcData descData;
- // create type
- rec.getField(ctx, SQL_DESC_TYPE, descData);
- if (descData.type() == OdbcData::Undef) {
- ctx.pushStatus(Error::Gen, "parameter %u external type not defined", paramNumber);
- return;
- }
- ExtType extType;
- SQLSMALLINT desc_TYPE = descData.smallint();
- switch (desc_TYPE) {
- case SQL_C_CHAR:
- case SQL_C_SHORT: // for sun.jdbc.odbc
- case SQL_C_SSHORT:
- case SQL_C_USHORT:
- case SQL_C_LONG: // for sun.jdbc.odbc
- case SQL_C_SLONG:
- case SQL_C_ULONG:
- case SQL_C_SBIGINT:
- case SQL_C_UBIGINT:
- case SQL_C_FLOAT:
- case SQL_C_DOUBLE:
- case SQL_C_TYPE_TIMESTAMP:
- case SQL_C_BINARY: // XXX BLOB hack
- break;
- default:
- ctx.pushStatus(Error::Gen, "parameter %u unsupported external type %d", paramNumber, (int)desc_TYPE);
- return;
- }
- extType.setType(ctx, static_cast<ExtType::Type>(desc_TYPE));
- ExtSpec extSpec(extType);
- // create data field
- rec.getField(ctx, SQL_DESC_DATA_PTR, descData);
- if (descData.type() == OdbcData::Undef) {
- ctx.pushStatus(Error::Gen, "parameter %u data address not defined", paramNumber);
- return;
- }
- SQLPOINTER desc_DATA_PTR = descData.pointer();
- rec.getField(ctx, SQL_DESC_OCTET_LENGTH, descData);
- if (descData.type() == OdbcData::Undef) {
- ctx.pushStatus(Error::Gen, "parameter %u data length not defined", paramNumber);
- return;
- }
- SQLINTEGER desc_OCTET_LENGTH = descData.integer();
- rec.getField(ctx, SQL_DESC_INDICATOR_PTR, descData);
- if (descData.type() == OdbcData::Undef) {
- ctx.pushStatus(Error::Gen, "parameter %u indicator address not defined", paramNumber);
- return;
- }
- SQLINTEGER* desc_INDICATOR_PTR = descData.integerPtr();
- ctx_log4(("parameter %u bind to 0x%x %d 0x%x", paramNumber, (unsigned)desc_DATA_PTR, (int)desc_OCTET_LENGTH, (unsigned)desc_INDICATOR_PTR));
- ExtField& extField = *new ExtField(extSpec, desc_DATA_PTR, desc_OCTET_LENGTH, desc_INDICATOR_PTR, paramNumber);
- data.m_atExec = false;
- if (desc_INDICATOR_PTR != 0 && *desc_INDICATOR_PTR < 0) {
- if (*desc_INDICATOR_PTR == SQL_NULL_DATA) {
- ;
- } else if (*desc_INDICATOR_PTR == SQL_DATA_AT_EXEC) {
- data.m_atExec = true;
- } else if (*desc_INDICATOR_PTR <= SQL_LEN_DATA_AT_EXEC(0)) {
- data.m_atExec = true;
- }
- }
- delete data.m_extField;
- data.m_extField = &extField;
- }
- void
- Exec_expr_param::evaluate(Ctx& ctx, Ctl& ctl)
- {
- if (ctl.m_postEval)
- return;
- const Code& code = getCode();
- Data& data = getData();
- if (data.m_atExec)
- return;
- ctx_assert(data.m_extField != 0);
- data.m_sqlField.copyin(ctx, *data.m_extField);
- }
- void
- Exec_expr_param::close(Ctx& ctx)
- {
- Data& data = getData();
- data.m_extPos = -1;
- }
- void
- Exec_expr_param::print(Ctx& ctx)
- {
- const Code& code = getCode();
- ctx.print(" [param %u]", code.m_paramNumber);
- }