Code_query_sys.cpp
上传用户:romrleung
上传日期:2022-05-23
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文件大小:3k
- /* 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 <NdbApi.hpp>
- #include <common/StmtArea.hpp>
- #include <dictionary/DictTable.hpp>
- #include <dictionary/DictColumn.hpp>
- #include "Code_query_sys.hpp"
- #include "Code_column.hpp"
- #include "Code_root.hpp"
- // Plan_query_sys
- Plan_query_sys::~Plan_query_sys()
- {
- }
- Plan_base*
- Plan_query_sys::analyze(Ctx& ctx, Ctl& ctl)
- {
- ctx_assert(m_table != 0);
- m_table->analyze(ctx, ctl);
- if (! ctx.ok())
- return 0;
- return this;
- }
- Exec_base*
- Plan_query_sys::codegen(Ctx& ctx, Ctl& ctl)
- {
- // set up
- ctx_assert(m_table != 0);
- const DictTable& dictTable = m_table->dictTable();
- const ColumnVector& columns = m_table->exprColumns();
- ctx_assert(columns.size() > 0);
- const unsigned attrCount = columns.size() - 1;
- // create the code
- Exec_query_sys::Code& code = *new Exec_query_sys::Code(attrCount);
- code.m_sysId = dictTable.sysId();
- // queried attributes
- code.m_attrId = new NdbAttrId[1 + attrCount];
- code.m_attrId[0] = (NdbAttrId)-1;
- for (unsigned i = 1; i <= attrCount; i++) {
- Plan_column* column = columns[i];
- ctx_assert(column != 0);
- const DictColumn& dictColumn = column->dictColumn();
- const SqlType& sqlType = dictColumn.sqlType();
- SqlSpec sqlSpec(sqlType, SqlSpec::Physical);
- code.m_sqlSpecs.setEntry(i, sqlSpec);
- code.m_attrId[i] = dictColumn.getAttrId();
- }
- // create the exec
- Exec_query_sys* exec = new Exec_query_sys(ctl.m_execRoot);
- ctl.m_execRoot->saveNode(exec);
- exec->setCode(code);
- return exec;
- }
- void
- Plan_query_sys::print(Ctx& ctx)
- {
- ctx.print(" [query_sys");
- Plan_base* a[] = { m_table };
- printList(ctx, a, 1);
- ctx.print("]");
- }
- // Exec_query_sys
- Exec_query_sys::Code::~Code()
- {
- delete[] m_attrId;
- }
- Exec_query_sys::Data::~Data()
- {
- }
- Exec_query_sys::~Exec_query_sys()
- {
- }
- void
- Exec_query_sys::alloc(Ctx& ctx, Ctl& ctl)
- {
- const Code& code = getCode();
- // create data
- Data& data = *new Data(this, code.sqlSpecs());
- setData(data);
- }
- void
- Exec_query_sys::close(Ctx& ctx)
- {
- Data& data = getData();
- data.m_rowPos = 0;
- data.m_tablePos = 0;
- data.m_attrPos = 0;
- data.m_keyPos = 0;
- }
- void
- Exec_query_sys::print(Ctx& ctx)
- {
- ctx.print(" [query_sys");
- if (m_code != 0) {
- const Code& code = getCode();
- ctx.print(" attrId=");
- for (unsigned i = 1; i <= code.m_attrCount; i++) {
- if (i > 1)
- ctx.print(",");
- ctx.print("%u", (unsigned)code.m_attrId[i]);
- }
- ctx.print(" sysId=%u", (unsigned)code.m_sysId);
- }
- ctx.print("]");
- }