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Copy pathsqlitetypes.cpp
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413 lines (360 loc) · 10.5 KB
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#include "sqlitetypes.h"
#include "grammar/Sqlite3Lexer.hpp"
#include "grammar/Sqlite3Parser.hpp"
#include <sstream>
#include <QDebug>
namespace sqlb {
QStringList Field::Datatypes = QStringList() << "INTEGER" << "TEXT" << "BLOB" << "REAL" << "NUMERIC";
QString Field::toString(const QString& indent, const QString& sep) const
{
QString str = indent + '`' + m_name + '`' + sep + m_type;
if(m_notnull)
str += " NOT NULL";
if(!m_defaultvalue.isEmpty())
str += QString(" DEFAULT '%1'").arg(m_defaultvalue);
if(!m_check.isEmpty())
str += " CHECK(" + m_check + ")";
if(m_autoincrement)
str += " PRIMARY KEY AUTOINCREMENT";
return str;
}
bool Field::isText() const
{
QString norm = m_type.trimmed().toLower();
return norm.startsWith("character")
|| norm.startsWith("varchar")
|| norm.startsWith("varying character")
|| norm.startsWith("nchar")
|| norm.startsWith("native charactar")
|| norm.startsWith("nvarchar")
|| norm == "text"
|| norm == "clob";
}
bool Field::isInteger() const
{
QString norm = m_type.trimmed().toLower();
return norm == "int"
|| norm == "integer"
|| norm == "tinyint"
|| norm == "smallint"
|| norm == "mediumint"
|| norm == "bigint"
|| norm == "unsigned big int"
|| norm == "int2"
|| norm == "int8";
}
void Table::clear()
{
m_fields.clear();
m_rowidColumn = "rowid";
}
Table::~Table()
{
clear();
}
void Table::addField(const FieldPtr& f)
{
m_fields.append(FieldPtr(f));
}
bool Table::removeField(const QString& sFieldName)
{
int index = findField(sFieldName);
if( index != -1)
{
m_fields.remove(index);
return true;
}
return false;
}
void Table::setFields(const FieldVector &fields)
{
clear();
m_fields = fields;
}
int Table::findField(const QString &sname)
{
for(int i = 0; i < m_fields.count(); ++i)
{
if(sname == m_fields.at(i)->name())
return i;
}
return -1;
}
int Table::findPk() const
{
for(int i = 0; i < m_fields.count(); ++i)
{
if(m_fields.at(i)->primaryKey())
return i;
}
return -1;
}
QStringList Table::fieldList() const
{
QStringList sl;
foreach(FieldPtr f, m_fields) {
sl << f->toString();
}
return sl;
}
bool Table::hasAutoIncrement() const
{
foreach(FieldPtr f, m_fields) {
if(f->autoIncrement())
return true;
}
return false;
}
Table Table::parseSQL(const QString &sSQL)
{
std::stringstream s;
s << sSQL.toStdString();
Sqlite3Lexer lex(s);
Sqlite3Parser parser(lex);
antlr::ASTFactory ast_factory;
parser.initializeASTFactory(ast_factory);
parser.setASTFactory(&ast_factory);
try
{
parser.createtable();
CreateTableWalker ctw(parser.getAST());
return ctw.table();
}
catch(...)
{
qCritical() << "Sqlite parse error: " << sSQL; //TODO
}
return Table("");
}
QString Table::emptyInsertStmt() const
{
QString stmt = QString("INSERT INTO `%1`").arg(m_name);
QStringList vals;
QStringList fields;
foreach(FieldPtr f, m_fields) {
if(f->notnull())
{
fields << f->name();
if( f->primaryKey() && f->isInteger() )
{
vals << "NULL";
} else {
if(f->isInteger())
vals << "0";
else
vals << "''";
}
}
else
{
// don't insert into fields with a default value
// or we will never see it.
if(f->defaultValue().length() == 0)
{
fields << f->name();
vals << "NULL";
}
}
}
if(!fields.empty())
{
stmt.append("(`");
stmt.append(fields.join("`,`"));
stmt.append("`)");
}
stmt.append(" VALUES (");
stmt.append(vals.join(","));
stmt.append(");");
return stmt;
}
QString Table::sql() const
{
QString sql = QString("CREATE TABLE `%1` (\n").arg(m_name);
sql += fieldList().join(",\n");
// primary key
if(!hasAutoIncrement())
{
QString pk = ",\n\tPRIMARY KEY(";
bool pks_found = false;
foreach(FieldPtr f, m_fields)
{
if(f->primaryKey())
{
pk += f->name() + ",";
pks_found = true;
}
}
pk.chop(1);
if(pks_found)
sql += pk + ")";
}
sql += "\n)";
// without rowid
if(m_rowidColumn != "rowid")
sql += " WITHOUT ROWID";
return sql + ";";
}
namespace
{
QString identifier(antlr::RefAST ident)
{
QString sident = ident->getText().c_str();
if(ident->getType() == sqlite3TokenTypes::QUOTEDID ||
ident->getType() == Sqlite3Lexer::QUOTEDLITERAL ||
ident->getType() == sqlite3TokenTypes::STRINGLITERAL)
{
sident.remove(0, 1);
sident.remove(sident.length() - 1, 1);
}
return sident;
}
QString concatTextAST(antlr::RefAST t, bool withspace = false)
{
QStringList stext;
while(t != antlr::nullAST)
{
stext.append(t->getText().c_str());
t = t->getNextSibling();
}
return stext.join(withspace ? " " : "");
}
}
Table CreateTableWalker::table()
{
Table tab("");
if( m_root ) //CREATE TABLE
{
antlr::RefAST s = m_root->getFirstChild();
//skip to tablename
while(s->getType() != Sqlite3Lexer::ID &&
s->getType() != Sqlite3Lexer::QUOTEDID &&
s->getType() != Sqlite3Lexer::QUOTEDLITERAL &&
s->getType() != Sqlite3Lexer::STRINGLITERAL &&
s->getType() != sqlite3TokenTypes::KEYWORDASTABLENAME)
{
s = s->getNextSibling();
}
tab.setName(identifier(s));
s = s->getNextSibling(); // LPAREN
s = s->getNextSibling(); // first column name
antlr::RefAST column = s;
// loop columndefs
while(column != antlr::nullAST && column->getType() == sqlite3TokenTypes::COLUMNDEF)
{
FieldPtr f;
parsecolumn(f, column->getFirstChild());
tab.addField(f);
column = column->getNextSibling(); //COMMA or RPAREN
column = column->getNextSibling(); //null or tableconstraint
}
// now we are finished or it is a tableconstraint
while(s != antlr::nullAST)
{
// Is this a 'without rowid' definiton?
if(s->getType() != sqlite3TokenTypes::WITHOUT)
{
// It's not, so treat this as table constraints
antlr::RefAST tc = s->getFirstChild();
// skip constraint name, if there is any
if(tc->getType() == sqlite3TokenTypes::CONSTRAINT)
tc = tc->getNextSibling()->getNextSibling();
switch(tc->getType())
{
case sqlite3TokenTypes::PRIMARY:
{
tc = tc->getNextSibling()->getNextSibling(); // skip primary and key
tc = tc->getNextSibling(); // skip LPAREN
do
{
QString col = identifier(tc);
int fieldindex = tab.findField(col);
if(fieldindex != -1)
tab.fields().at(fieldindex)->setPrimaryKey(true);
tc = tc->getNextSibling(); // skip ident and comma
tc = tc->getNextSibling();
} while(tc != antlr::nullAST && tc->getType() != sqlite3TokenTypes::RPAREN);
}
break;
default: break;
}
s = s->getNextSibling(); //COMMA or RPAREN
s = s->getNextSibling();
} else {
// It is
s = s->getNextSibling(); // WITHOUT
s = s->getNextSibling(); // ROWID
tab.setRowidColumn(tab.fields().at(tab.findPk())->name());
}
}
}
return tab;
}
void CreateTableWalker::parsecolumn(FieldPtr& f, antlr::RefAST c)
{
QString columnname;
QString type = "TEXT";
bool autoincrement = false;
bool primarykey = false;
bool notnull = false;
QString defaultvalue;
QString check;
if(c->getType() == sqlite3TokenTypes::KEYWORDASCOLUMNNAME)
columnname = concatTextAST(c->getFirstChild());
else
columnname = identifier(c);
c = c->getNextSibling(); //type?
if(c != antlr::nullAST && c->getType() == sqlite3TokenTypes::TYPE_NAME)
{
type = concatTextAST(c->getFirstChild());
c = c->getNextSibling();
}
// finished with type parsing
// now columnconstraints
while(c != antlr::nullAST)
{
antlr::RefAST con = c->getFirstChild();
// skip constraint name, if there is any
if(con->getType() == sqlite3TokenTypes::CONSTRAINT)
con = con->getNextSibling()->getNextSibling();
switch(con->getType())
{
case sqlite3TokenTypes::PRIMARY:
{
primarykey = true;
con = con->getNextSibling()->getNextSibling(); // skip KEY
if(con != antlr::nullAST && (con->getType() == sqlite3TokenTypes::ASC
|| con->getType() == sqlite3TokenTypes::DESC))
con = con->getNextSibling(); //skip
if(con != antlr::nullAST && con->getType() == sqlite3TokenTypes::AUTOINCREMENT)
autoincrement = true;
}
break;
case sqlite3TokenTypes::NOT:
{
notnull = true;
}
break;
case sqlite3TokenTypes::CHECK:
{
con = con->getNextSibling(); //LPAREN
check = concatTextAST(con, true);
// remove parenthesis
check.remove(check.length()-1, 1);
check.remove(0,1);
check = check.trimmed();
}
break;
case sqlite3TokenTypes::DEFAULT:
{
con = con->getNextSibling(); //SIGNEDNUMBER,STRING,LPAREN
defaultvalue = concatTextAST(con);
}
break;
default: break;
}
c = c->getNextSibling();
}
f = FieldPtr( new Field(columnname, type, notnull, defaultvalue, check, primarykey));
f->setAutoIncrement(autoincrement);
}
} //namespace sqlb