Initial revision of NDB Cluster files

1 files changed, 138 insertions, 0 deletions

diff --git a/ndb/src/client/odbc/codegen/Code_expr_const.cpp b/ndb/src/client/odbc/codegen/Code_expr_const.cpp
new file mode 100644
index 00000000000..564d307a4f8
--- /dev/null
+++ b/ndb/src/client/odbc/codegen/Code_expr_const.cpp
@@ -0,0 +1,138 @@
+/* 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_const.hpp"
+#include "Code_root.hpp"
+
+// Plan_expr_const
+
+Plan_expr_const::~Plan_expr_const()
+{
+}
+
+Plan_base*
+Plan_expr_const::analyze(Ctx& ctx, Ctl& ctl)
+{
+    m_exec = 0;
+    // convert data type
+    m_lexType.convert(ctx, m_sqlType, m_string.length());
+    if (! ctx.ok())
+	return 0;
+    // depends on no tables
+    // set alias name
+    m_alias = m_string;
+    // node was not changed
+    return this;
+}
+
+Exec_base*
+Plan_expr_const::codegen(Ctx& ctx, Ctl& ctl)
+{
+    if (m_exec != 0)
+	return m_exec;
+    // convert data
+    SqlSpec sqlSpec(m_sqlType, SqlSpec::Physical);
+    SqlField sqlField(sqlSpec);
+    LexSpec lexSpec(m_lexType);
+    lexSpec.convert(ctx, m_string, sqlField);
+    if (! ctx.ok())
+	return 0;
+    // create code
+    Exec_expr_const* exec = new Exec_expr_const(ctl.m_execRoot);
+    ctl.m_execRoot->saveNode(exec);
+    Exec_expr_const::Code& code = *new Exec_expr_const::Code(sqlField);
+    exec->setCode(code);
+    m_exec = exec;
+    return exec;
+}
+
+void
+Plan_expr_const::print(Ctx& ctx)
+{
+    ctx.print(" [const %s]", m_string.c_str());
+}
+
+bool
+Plan_expr_const::isEqual(const Plan_expr* expr) const
+{
+    ctx_assert(expr != 0);
+    if (expr->type() != Plan_expr::TypeConst)
+	return false;
+    const Plan_expr_const* expr2 = static_cast<const Plan_expr_const*>(expr);
+    if (strcmp(m_string.c_str(), expr2->m_string.c_str()) != 0)
+	return false;
+    return true;
+}
+
+bool
+Plan_expr_const::isGroupBy(const Plan_expr_row* row) const
+{
+    return true;
+}
+
+// Exec_expr_const
+
+Exec_expr_const::Code::~Code()
+{
+}
+
+Exec_expr_const::Data::~Data()
+{
+}
+
+Exec_expr_const::~Exec_expr_const()
+{
+}
+
+void
+Exec_expr_const::alloc(Ctx& ctx, Ctl& ctl)
+{
+    if (m_data != 0)
+	return;
+    // copy the value for const correctness reasons
+    SqlField sqlField(getCode().m_sqlField);
+    Data& data = *new Data(sqlField);
+    setData(data);
+}
+
+void
+Exec_expr_const::evaluate(Ctx& ctx, Ctl& ctl)
+{
+    const Code& code = getCode();
+    Data& data = getData();
+    if (ctl.m_groupIndex != 0) {
+	SqlField& out = data.groupField(code.sqlSpec().sqlType(), ctl.m_groupIndex, ctl.m_groupInit);
+	data.sqlField().copy(ctx, out);
+    }
+}
+
+void
+Exec_expr_const::close(Ctx& ctx)
+{
+    Data& data = getData();
+    data.m_groupField.clear();
+}
+
+void
+Exec_expr_const::print(Ctx& ctx)
+{
+    const Code& code = getCode();
+    ctx.print(" [");
+    char buf[500];
+    code.m_sqlField.print(buf, sizeof(buf));
+    ctx.print("%s", buf);
+    ctx.print("]");
+}