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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 <NdbApi.hpp>
#include <common/StmtArea.hpp>
#include <common/ResultArea.hpp>
#include <codegen/Code_expr.hpp>
#include <codegen/Code_update_index.hpp>
#include <codegen/Code_query.hpp>
void
Exec_update_index::execImpl(Ctx& ctx, Ctl& ctl)
{
const Code& code = getCode();
Data& data = getData();
Ndb* const ndb = ndbObject();
NdbConnection* const tcon = ndbConnection();
// execute subquery
ctx_assert(m_query != 0);
m_query->execute(ctx, ctl);
if (! ctx.ok())
return;
// update each row from the query
while (m_query->fetch(ctx, ctl)) {
NdbOperation* op = tcon->getNdbIndexOperation(code.m_indexName, code.m_tableName);
if (op == 0) {
ctx.pushStatus(ndb, tcon, 0, "getNdbIndexOperation");
return;
}
if (op->updateTuple() == -1) {
ctx.pushStatus(ndb, tcon, op, "updateTuple");
return;
}
// key attributes
bool done = false;
for (unsigned k = 1; k <= code.m_keyCount; k++) {
Exec_expr* exprMatch = code.m_keyMatch[k];
ctx_assert(exprMatch != 0);
exprMatch->evaluate(ctx, ctl);
if (! ctx.ok())
return;
const SqlField& keyMatch = exprMatch->getData().sqlField();
SqlField f(code.m_keySpecs.getEntry(k));
if (! keyMatch.cast(ctx, f)) {
done = true; // match is not possible
break;
}
const NdbAttrId keyId = code.m_keyId[k];
const void* addr = f.addr();
const char* value = static_cast<const char*>(addr);
if (op->equal(keyId, value) == -1) {
ctx.pushStatus(ndb, tcon, op, "equal attrId=%u", (unsigned)keyId);
return;
}
}
if (done)
continue;
// updated attributes
const SqlRow& sqlRow = m_query->getData().sqlRow();
ctx_assert(sqlRow.count() == code.m_attrCount);
for (unsigned i = 1; i <= code.m_attrCount; i++) {
const NdbAttrId attrId = code.m_attrId[i];
const SqlField& f = sqlRow.getEntry(i);
const void* addr = f.sqlNull() ? 0 : f.addr();
const char* value = static_cast<const char*>(addr);
if (op->setValue(attrId, value) == -1) {
ctx.pushStatus(ndb, tcon, op, "setValue attrId=%u", (unsigned)attrId);
return;
}
}
data.setCount(0);
if (tcon->execute(NoCommit) == -1) {
// XXX when did 626 move to connection level
if (tcon->getNdbError().code != 626 && op->getNdbError().code != 626) {
ctx.pushStatus(ndb, tcon, op, "execute without commit");
return;
}
} else {
data.addCount();
}
}
stmtArea().setRowCount(ctx, data.getCount());
}
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