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Exec_delete_index.cpp
Package: mysql-4.1.16-win-src.zip [view]
Upload User: romrleung
Upload Date: 2022-05-23
Package Size: 18897k
Code Size: 3k
Category:
MySQL
Development Platform:
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 <NdbApi.hpp>
- #include <common/StmtArea.hpp>
- #include <common/ResultArea.hpp>
- #include <codegen/Code_expr.hpp>
- #include <codegen/Code_delete_index.hpp>
- #include <codegen/Code_query.hpp>
- void
- Exec_delete_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;
- // delete each row from the query
- data.setCount(0);
- while (m_query->fetch(ctx, ctl)) {
- NdbOperation* op = tcon->getNdbIndexOperation(code.m_indexName, code.m_tableName);
- if (op == 0) {
- ctx.pushStatus(ndb, tcon, 0, "getIndexNdbOperation");
- return;
- }
- if (op->deleteTuple() == -1) {
- ctx.pushStatus(ndb, tcon, op, "deleteTuple");
- return;
- }
- 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;
- 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());
- }