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/* 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 <common/StmtArea.hpp>
#include <dictionary/DictTable.hpp>
#include <dictionary/DictColumn.hpp>
#include "Code_dml_column.hpp"
#include "Code_update_scan.hpp"
#include "Code_table.hpp"
#include "Code_root.hpp"
// Plan_update_scan
Plan_update_scan::~Plan_update_scan()
{
}
Plan_base*
Plan_update_scan::analyze(Ctx& ctx, Ctl& ctl)
{
ctl.m_dmlRow = m_dmlRow; // row type to convert to
ctx_assert(m_query != 0);
m_query->analyze(ctx, ctl);
if (! ctx.ok())
return 0;
ctx_assert(m_table != 0);
m_table->analyze(ctx, ctl);
if (! ctx.ok())
return 0;
return this;
}
void
Plan_update_scan::describe(Ctx& ctx)
{
stmtArea().setFunction(ctx, "UPDATE WHERE", SQL_DIAG_UPDATE_WHERE);
}
Exec_base*
Plan_update_scan::codegen(Ctx& ctx, Ctl& ctl)
{
// generate code for the query
ctx_assert(m_query != 0);
Exec_query* execQuery = static_cast<Exec_query*>(m_query->codegen(ctx, ctl));
if (! ctx.ok())
return 0;
ctx_assert(execQuery != 0);
// set up
ctx_assert(m_table != 0);
const ColumnVector& columns = m_table->dmlColumns();
ctx_assert(columns.size() > 0);
const unsigned attrCount = columns.size() - 1;
// create the code
Exec_update_scan::Code& code = *new Exec_update_scan::Code();
// updated attributes
code.m_attrCount = attrCount;
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();
code.m_attrId[i] = dictColumn.getAttrId();
}
// create the exec
Exec_update_scan* exec = new Exec_update_scan(ctl.m_execRoot);
ctl.m_execRoot->saveNode(exec);
exec->setCode(code);
exec->setQuery(execQuery);
return exec;
}
void
Plan_update_scan::print(Ctx& ctx)
{
ctx.print(" [update_scan");
Plan_base* a[] = { m_table, m_query };
printList(ctx, a, sizeof(a)/sizeof(a[0]));
ctx.print("]");
}
// Exec_delete
Exec_update_scan::Code::~Code()
{
delete[] m_attrId;
}
Exec_update_scan::Data::~Data()
{
}
Exec_update_scan::~Exec_update_scan()
{
}
void
Exec_update_scan::alloc(Ctx& ctx, Ctl& ctl)
{
// allocate the subquery
ctx_assert(m_query != 0);
m_query->alloc(ctx, ctl);
if (! ctx.ok())
return;
// create data
Data& data = *new Data;
setData(data);
}
void
Exec_update_scan::close(Ctx& ctx)
{
ctx_assert(m_query != 0);
m_query->close(ctx);
}
void
Exec_update_scan::print(Ctx& ctx)
{
ctx.print(" [update_scan");
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]);
}
}
Exec_base* a[] = { m_query };
printList(ctx, a, 1);
ctx.print("]");
}
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