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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 <common/CodeTree.hpp>
#include <executor/Executor.hpp>
#include "CodeGen.hpp"
#include "Code_root.hpp"
#include <FlexLexer.h>
#include "SimpleParser.hpp"
void
CodeGen::prepare(Ctx& ctx)
{
parse(ctx);
if (! ctx.ok())
return;
analyze(ctx);
if (! ctx.ok())
return;
describe(ctx);
}
void
CodeGen::execute(Ctx& ctx)
{
DescArea& ipd = m_stmtArea.descArea(Desc_usage_IPD);
if (m_stmtArea.m_unbound) {
analyze(ctx);
if (! ctx.ok())
return;
describe(ctx);
if (! ctx.ok())
return;
if (m_stmtArea.m_unbound) {
ctx.pushStatus(Sqlstate::_HY010, Error::Gen, "%u input parameters have unbound SQL type", m_stmtArea.m_unbound);
return;
}
ipd.setBound(true);
}
if (! ipd.isBound()) {
ctx_log2(("IPD changed between executes - reanalyze"));
// jdbc can change parameter length at each execute
analyze(ctx);
if (! ctx.ok())
return;
describe(ctx);
if (! ctx.ok())
return;
freeExec(ctx);
codegen(ctx);
if (! ctx.ok())
return;
alloc(ctx);
if (! ctx.ok())
return;
ipd.setBound(true);
}
if (m_stmtArea.m_execTree == 0) {
codegen(ctx);
if (! ctx.ok())
return;
alloc(ctx);
if (! ctx.ok())
return;
}
Executor executor(m_stmtArea);
executor.execute(ctx);
}
void
CodeGen::fetch(Ctx& ctx)
{
// XXX parameter types are not checked any more
ctx_assert(! m_stmtArea.m_unbound);
Executor executor(m_stmtArea);
executor.fetch(ctx);
}
void
CodeGen::parse(Ctx& ctx)
{
Plan_root* planRoot = new Plan_root(m_stmtArea);
SimpleParser simpleParser(ctx, m_stmtArea, planRoot);
simpleParser.yyparse();
if (! ctx.ok())
return;
planRoot->m_paramList.resize(1 + simpleParser.paramNumber());
ctx_log2(("CodeGen: parse done - plan tree follows"));
if (ctx.logLevel() >= 2)
planRoot->print(ctx);
m_stmtArea.m_planTree = planRoot;
}
void
CodeGen::analyze(Ctx& ctx)
{
Plan_root* planRoot = static_cast<Plan_root*>(m_stmtArea.m_planTree);
ctx_assert(planRoot != 0);
Plan_base::Ctl ctl(0);
planRoot->analyze(ctx, ctl); // returns itself
if (! ctx.ok())
return;
ctx_log2(("CodeGen: analyze done - plan tree follows"));
if (ctx.logLevel() >= 2)
planRoot->print(ctx);
}
void
CodeGen::describe(Ctx& ctx)
{
Plan_root* planRoot = static_cast<Plan_root*>(m_stmtArea.m_planTree);
ctx_assert(planRoot != 0);
planRoot->describe(ctx);
ctx_log2(("CodeGen: describe done"));
}
void
CodeGen::codegen(Ctx& ctx)
{
Plan_root* planRoot = static_cast<Plan_root*>(m_stmtArea.m_planTree);
ctx_assert(planRoot != 0);
Plan_base::Ctl ctl(0);
Exec_root* execRoot = static_cast<Exec_root*>(planRoot->codegen(ctx, ctl));
if (! ctx.ok())
return;
ctx_assert(execRoot != 0);
ctx_log2(("CodeGen: codegen done - code tree follows"));
if (ctx.logLevel() >= 2)
execRoot->print(ctx);
m_stmtArea.m_execTree = execRoot;
}
void
CodeGen::alloc(Ctx& ctx)
{
Exec_root* execRoot = static_cast<Exec_root*>(m_stmtArea.m_execTree);
ctx_assert(execRoot != 0);
Exec_base::Ctl ctl(0);
execRoot->alloc(ctx, ctl);
if (! ctx.ok())
return;
ctx_log2(("CodeGen: alloc done"));
}
void
CodeGen::close(Ctx& ctx)
{
Exec_root* execRoot = static_cast<Exec_root*>(m_stmtArea.m_execTree);
if (execRoot != 0) {
execRoot->close(ctx);
ctx_log2(("CodeGen: close done"));
}
}
void
CodeGen::free(Ctx& ctx)
{
freePlan(ctx);
freeExec(ctx);
}
void
CodeGen::freePlan(Ctx & ctx)
{
if (m_stmtArea.m_planTree != 0) {
Plan_root* planRoot = static_cast<Plan_root*>(m_stmtArea.m_planTree);
ctx_assert(planRoot != 0);
unsigned count = 1 + planRoot->m_nodeList.size();
planRoot->freeNodeList();
delete planRoot;
m_stmtArea.m_planTree = 0;
ctx_log3(("CodeGen: freed %u plan tree nodes", count));
}
}
void
CodeGen::freeExec(Ctx & ctx)
{
if (m_stmtArea.m_execTree != 0) {
Exec_root* execRoot = static_cast<Exec_root*>(m_stmtArea.m_execTree);
ctx_assert(execRoot != 0);
unsigned count = 1 + execRoot->m_nodeList.size();
execRoot->freeNodeList();
delete execRoot;
m_stmtArea.m_execTree = 0;
ctx_log3(("CodeGen: freed %u exec tree nodes", count));
}
}
// odbc support
void
CodeGen::sqlGetData(Ctx& ctx, SQLUSMALLINT columnNumber, SQLSMALLINT targetType, SQLPOINTER targetValue, SQLINTEGER bufferLength, SQLINTEGER* strlen_or_Ind)
{
Exec_root* execRoot = static_cast<Exec_root*>(m_stmtArea.m_execTree);
ctx_assert(execRoot != 0);
execRoot->sqlGetData(ctx, columnNumber, targetType, targetValue, bufferLength, strlen_or_Ind);
}
void
CodeGen::sqlParamData(Ctx& ctx, SQLPOINTER* value)
{
Exec_root* execRoot = static_cast<Exec_root*>(m_stmtArea.m_execTree);
ctx_assert(execRoot != 0);
execRoot->sqlParamData(ctx, value);
}
void
CodeGen::sqlPutData(Ctx& ctx, SQLPOINTER data, SQLINTEGER strlen_or_Ind)
{
Exec_root* execRoot = static_cast<Exec_root*>(m_stmtArea.m_execTree);
ctx_assert(execRoot != 0);
execRoot->sqlPutData(ctx, data, strlen_or_Ind);
}
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