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Copy pathsqlitetypes.cpp
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605 lines (521 loc) · 17.5 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 escapeIdentifier(QString id)
{
return '`' + id.replace('`', "``") + '`';
}
bool ForeignKeyClause::isSet() const
{
return m_override.size() || m_table.size();
}
QString ForeignKeyClause::toString() const
{
if(!isSet())
return QString();
if(m_override.size())
return m_override;
QString result = escapeIdentifier(m_table);
if(m_columns.size())
{
result += "(";
foreach(const QString& column, m_columns)
result += escapeIdentifier(column) + ',';
result.chop(1); // Remove last comma
result += ")";
}
if(m_constraint.size())
result += " " + m_constraint;
return result;
}
void ForeignKeyClause::setFromString(const QString& fk)
{
m_override = fk;
}
QString Field::toString(const QString& indent, const QString& sep) const
{
QString str = indent + escapeIdentifier(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";
if(m_unique)
str += " UNIQUE";
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 character")
|| 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(m_fields.at(i)->name().compare(sname, Qt::CaseInsensitive) == 0)
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(const FieldPtr& f, m_fields) {
sl << f->toString();
}
return sl;
}
QStringList Table::fieldNames() const
{
QStringList sl;
foreach(FieldPtr f, m_fields)
sl << f->name();
return sl;
}
bool Table::hasAutoIncrement() const
{
foreach(FieldPtr f, m_fields) {
if(f->autoIncrement())
return true;
}
return false;
}
QPair<Table, bool> 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 qMakePair(ctw.table(), ctw.modifysupported());
}
catch(antlr::ANTLRException& ex)
{
qCritical() << "Sqlite parse error: " << QString::fromStdString(ex.toString()) << "(" << sSQL << ")";
}
catch(...)
{
qCritical() << "Sqlite parse error: " << sSQL; //TODO
}
return qMakePair(Table(""), false);
}
QString Table::sql() const
{
QString sql = QString("CREATE TABLE %1 (\n").arg(escapeIdentifier(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 + ")";
}
// foreign keys
foreach(FieldPtr f, m_fields)
{
if(f->foreignKey().isSet())
sql += QString(",\n\tFOREIGN KEY(%1) REFERENCES %2").arg(escapeIdentifier(f->name())).arg(f->foreignKey().toString());
}
sql += "\n)";
// without rowid
if(isWithoutRowidTable())
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)
{
// Remember the way the identifier is quoted
QChar quoteChar = sident.at(0);
// Remove first and final character, i.e. the quotes
sident.remove(0, 1);
sident.chop(1);
// Replace all remaining occurences of two succeeding quote characters and replace them
// by a single instance. This is done because two quotes can be used as a means of escaping
// the quote character, thus only the visual representation has its two quotes, the actual
// name contains only one.
sident.replace(QString(quoteChar) + quoteChar, quoteChar);
}
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 ? " " : "");
}
}
namespace {
QString tablename(const antlr::RefAST& n)
{
if(n->getType() == sqlite3TokenTypes::KEYWORDASTABLENAME)
return concatTextAST(n->getFirstChild());
else
return identifier(n);
}
QString columnname(const antlr::RefAST& n)
{
if(n->getType() == sqlite3TokenTypes::KEYWORDASCOLUMNNAME)
return concatTextAST(n->getFirstChild());
else
return identifier(n);
}
}
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(tablename(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 = columnname(tc);
int fieldindex = tab.findField(col);
if(fieldindex != -1)
tab.fields().at(fieldindex)->setPrimaryKey(true);
tc = tc->getNextSibling();
if(tc != antlr::nullAST
&& (tc->getType() == sqlite3TokenTypes::ASC
|| tc->getType() == sqlite3TokenTypes::DESC))
{
// TODO save ASC / DESC information?
m_bModifySupported = false;
tc = tc->getNextSibling();
}
if(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::AUTOINCREMENT)
{
tab.fields().at(fieldindex)->setAutoIncrement(true);
tc = tc->getNextSibling();
}
while(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::COMMA)
{
tc = tc->getNextSibling(); // skip ident and comma
}
} while(tc != antlr::nullAST && tc->getType() != sqlite3TokenTypes::RPAREN);
}
break;
case sqlite3TokenTypes::UNIQUE:
{
tc = tc->getNextSibling(); // skip UNIQUE
tc = tc->getNextSibling(); // skip LPAREN
QVector<int> uniquefieldsindex;
do
{
QString col = columnname(tc);
int fieldindex = tab.findField(col);
if(fieldindex != -1)
uniquefieldsindex.append(fieldindex);
tc = tc->getNextSibling();
if(tc != antlr::nullAST
&& (tc->getType() == sqlite3TokenTypes::ASC
|| tc->getType() == sqlite3TokenTypes::DESC))
{
// TODO save ASC / DESC information?
m_bModifySupported = false;
tc = tc->getNextSibling();
}
while(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::COMMA)
{
tc = tc->getNextSibling(); // skip ident and comma
}
} while(tc != antlr::nullAST && tc->getType() != sqlite3TokenTypes::RPAREN);
if(uniquefieldsindex.size() == 1)
{
tab.fields().at(uniquefieldsindex[0])->setUnique(true);
}
else
{
// else save on table a unique with more than one field
m_bModifySupported = false;
}
}
break;
case sqlite3TokenTypes::FOREIGN:
{
sqlb::ForeignKeyClause fk;
tc = tc->getNextSibling(); // FOREIGN
tc = tc->getNextSibling(); // KEY
tc = tc->getNextSibling(); // LPAREN
QString column_name = columnname(tc);
tc = tc->getNextSibling(); // identifier
if(tc->getType() == sqlite3TokenTypes::COMMA)
{
// No support for composite foreign keys
m_bModifySupported = false;
break;
}
tc = tc->getNextSibling(); // RPAREN
tc = tc->getNextSibling(); // REFERENCES
fk.setTable(identifier(tc));
tc = tc->getNextSibling(); // identifier
if(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::LPAREN)
{
tc = tc->getNextSibling(); // LPAREN
QStringList fk_cols;
while(tc != antlr::nullAST && tc->getType() != sqlite3TokenTypes::RPAREN)
{
if(tc->getType() != sqlite3TokenTypes::COMMA)
fk_cols.push_back(identifier(tc));
tc = tc->getNextSibling();
}
fk.setColumns(fk_cols);
tc = tc->getNextSibling(); // RPAREN
}
fk.setConstraint(concatTextAST(tc, true));
tab.fields().at(tab.findField(column_name))->setForeignKey(fk);
}
break;
default:
{
m_bModifySupported = false;
}
break;
}
s = s->getNextSibling(); //COMMA or RPAREN
if(s->getType() == sqlite3TokenTypes::COMMA || s->getType() == sqlite3TokenTypes::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 colname;
QString type = "TEXT";
bool autoincrement = false;
bool primarykey = false;
bool notnull = false;
bool unique = false;
QString defaultvalue;
QString check;
sqlb::ForeignKeyClause foreignKey;
colname = columnname(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)
{
m_bModifySupported = false;
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))
{
m_bModifySupported = false;
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;
case sqlite3TokenTypes::UNIQUE:
{
unique = true;
}
break;
case sqlite3TokenTypes::REFERENCES:
{
con = con->getNextSibling(); // REFERENCES
foreignKey.setTable(identifier(con));
con = con->getNextSibling(); // identifier
if(con != antlr::nullAST && con->getType() == sqlite3TokenTypes::LPAREN)
{
con = con->getNextSibling(); // LPAREN
QStringList fk_cols;
while(con != antlr::nullAST && con->getType() != sqlite3TokenTypes::RPAREN)
{
if(con->getType() != sqlite3TokenTypes::COMMA)
fk_cols.push_back(identifier(con));
con = con->getNextSibling();
}
foreignKey.setColumns(fk_cols);
con = con->getNextSibling(); // RPAREN
}
foreignKey.setConstraint(concatTextAST(con, true));
}
break;
default:
{
m_bModifySupported = false;
}
break;
}
c = c->getNextSibling();
}
f = FieldPtr( new Field(colname, type, notnull, defaultvalue, check, primarykey, unique));
f->setAutoIncrement(autoincrement);
f->setForeignKey(foreignKey);
}
} //namespace sqlb
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