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1494 lines (1256 loc) · 45.3 KB
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#include "sqlitetypes.h"
#include "ObjectIdentifier.h"
#include "grammar/Sqlite3Lexer.hpp"
#include "grammar/Sqlite3Parser.hpp"
#include <clocale> // This include seems to only be necessary for the Windows build
#include <iostream>
#include <iterator>
#include <numeric>
#include <sstream>
namespace {
bool starts_with_ci(const std::string& str, const std::string& with)
{
if(str.size() < with.size())
return false;
else
return compare_ci(str.substr(0, with.size()), with);
}
}
namespace sqlb {
StringVector escapeIdentifier(StringVector ids)
{
std::transform(ids.begin(), ids.end(), ids.begin(), [](const std::string& id) {
return escapeIdentifier(id);
});
return ids;
}
std::string joinStringVector(const StringVector& vec, const std::string& delim)
{
return std::accumulate(vec.begin(), vec.end(), std::string(), [delim](const std::string& so_far, const std::string& s) {
return so_far.empty() ? s : so_far + delim + s;
});
}
/**
* @brief The SetLocaleToC class
* This is a stupid helper class which sets the current locale as used by the C++ standard library to the C locale.
* Upon destruction it resets it to whatever the previous locale was. This is used to work around a problem in Antlr's
* string comparison which because it is case-independent relies on the current locale. However, when parsind SQL
* statements we don't want the locale to interfere here. Especially the Turkish locale is problematic here because
* of the dotted I problem.
*/
class SetLocaleToC
{
public:
SetLocaleToC()
: oldLocale(std::setlocale(LC_CTYPE, nullptr)) // Query current locale and save it
{
// Set locale for standard library functions
std::setlocale(LC_CTYPE, "C.UTF-8");
}
~SetLocaleToC()
{
// Reset old locale
std::setlocale(LC_CTYPE, oldLocale.c_str());
}
private:
std::string oldLocale;
};
/**
* @brief The CreateTableWalker class
* Goes trough the createtable AST and returns
* Table object.
*/
class CreateTableWalker
{
public:
explicit CreateTableWalker(antlr::RefAST r)
: m_root(r)
{}
TablePtr table();
private:
void parsecolumn(Table* table, antlr::RefAST c);
std::string parseConflictClause(antlr::RefAST c);
private:
antlr::RefAST m_root;
};
/**
* @brief The CreateIndexWalker class
* Goes trough the createtable AST and returns
* Index object.
*/
class CreateIndexWalker
{
public:
explicit CreateIndexWalker(antlr::RefAST r)
: m_root(r)
{}
IndexPtr index();
private:
void parsecolumn(Index* index, antlr::RefAST c);
private:
antlr::RefAST m_root;
};
bool Object::operator==(const Object& rhs) const
{
if(m_name != rhs.m_name)
return false;
if(m_fullyParsed != rhs.m_fullyParsed) // We check for the fully parsed flag to make sure not to lose anything in some corner cases
return false;
// We don't care about the original SQL text
return true;
}
std::string Object::typeToString(Types type)
{
switch(type)
{
case Types::Table: return "table";
case Types::Index: return "index";
case Types::View: return "view";
case Types::Trigger: return "trigger";
}
return "";
}
bool ForeignKeyClause::isSet() const
{
return m_override.size() || m_table.size();
}
std::string ForeignKeyClause::toString() const
{
if(!isSet())
return "";
if(m_override.size())
return m_override;
std::string result = escapeIdentifier(m_table);
if(m_columns.size())
result += "(" + joinStringVector(escapeIdentifier(m_columns), ",") + ")";
if(m_constraint.size())
result += " " + m_constraint;
return result;
}
void ForeignKeyClause::setFromString(const std::string& fk)
{
m_override = fk;
}
std::string ForeignKeyClause::toSql(const StringVector& applyOn) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "FOREIGN KEY(" + joinStringVector(escapeIdentifier(applyOn), ",") + ") REFERENCES " + this->toString();
return result;
}
std::string UniqueConstraint::toSql(const StringVector& applyOn) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "UNIQUE(" + joinStringVector(escapeIdentifier(applyOn), ",") + ")";
return result;
}
std::string PrimaryKeyConstraint::toSql(const StringVector& applyOn) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "PRIMARY KEY(" + joinStringVector(escapeIdentifier(applyOn), ",") + ")";
if(!m_conflictAction.empty())
result += " ON CONFLICT " + m_conflictAction;
return result;
}
std::string CheckConstraint::toSql(const StringVector&) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "CHECK(" + m_expression + ")";
return result;
}
bool Field::operator==(const Field& rhs) const
{
if(m_name != rhs.m_name)
return false;
if(m_type != rhs.m_type)
return false;
if(m_notnull != rhs.m_notnull)
return false;
if(m_check != rhs.m_check)
return false;
if(m_defaultvalue != rhs.m_defaultvalue)
return false;
if(m_autoincrement != rhs.m_autoincrement)
return false;
if(m_unique != rhs.m_unique)
return false;
if(m_collation != rhs.m_collation)
return false;
return true;
}
std::string Field::toString(const std::string& indent, const std::string& sep) const
{
std::string str = indent + escapeIdentifier(m_name) + sep + m_type;
if(m_notnull)
str += " NOT NULL";
if(!m_defaultvalue.empty())
str += " DEFAULT " + m_defaultvalue;
if(!m_check.empty())
str += " CHECK(" + m_check + ")";
if(m_autoincrement)
str += " PRIMARY KEY AUTOINCREMENT";
if(m_unique)
str += " UNIQUE";
if(!m_collation.empty())
str += " COLLATE " + m_collation;
return str;
}
bool Field::isText() const
{
if(starts_with_ci(m_type, "character")) return true;
if(starts_with_ci(m_type, "varchar")) return true;
if(starts_with_ci(m_type, "varying character")) return true;
if(starts_with_ci(m_type, "nchar")) return true;
if(starts_with_ci(m_type, "native character")) return true;
if(starts_with_ci(m_type, "nvarchar")) return true;
if(compare_ci(m_type, "text")) return true;
if(compare_ci(m_type, "clob")) return true;
return false;
}
bool Field::isInteger() const
{
if(compare_ci(m_type, "int")) return true;
if(compare_ci(m_type, "integer")) return true;
if(compare_ci(m_type, "tinyint")) return true;
if(compare_ci(m_type, "smallint")) return true;
if(compare_ci(m_type, "mediumint")) return true;
if(compare_ci(m_type, "bigint")) return true;
if(compare_ci(m_type, "unsigned big int")) return true;
if(compare_ci(m_type, "int2")) return true;
if(compare_ci(m_type, "int8")) return true;
return false;
}
bool Field::isReal() const
{
if(compare_ci(m_type, "real")) return true;
if(compare_ci(m_type, "double")) return true;
if(compare_ci(m_type, "double precision")) return true;
if(compare_ci(m_type, "float")) return true;
return false;
}
bool Field::isNumeric() const
{
if(starts_with_ci(m_type, "decimal")) return true;
if(compare_ci(m_type, "numeric")) return true;
if(compare_ci(m_type, "boolean")) return true;
if(compare_ci(m_type, "date")) return true;
if(compare_ci(m_type, "datetime")) return true;
return false;
}
bool Field::isBlob() const
{
if(m_type.empty()) return true;
if(compare_ci(m_type, "blob")) return true;
return false;
}
std::string Field::affinity() const
{
if (isInteger()) return "INTEGER";
if (isText()) return "TEXT";
if (isBlob()) return "BLOB";
if (isReal()) return "REAL";
return "NUMERIC";
}
Table& Table::operator=(const Table& rhs)
{
// Base class
Object::operator=(rhs);
// Just assign the simple values
m_withoutRowid = rhs.m_withoutRowid;
m_virtual = rhs.m_virtual;
// Clear the fields and the constraints first in order to avoid duplicates and/or old data in the next step
fields.clear();
m_constraints.clear();
// Make copies of the fields and the constraints. This is necessary in order to avoid any unwanted changes to the application's main database
// schema representation just by modifying a reference to the fields or constraints and thinking it operates on a copy.
std::copy(rhs.fields.begin(), rhs.fields.end(), std::back_inserter(fields));
m_constraints = rhs.m_constraints;
return *this;
}
bool Table::operator==(const Table& rhs) const
{
if(!Object::operator==(rhs))
return false;
if(m_withoutRowid != rhs.m_withoutRowid)
return false;
if(m_virtual != rhs.m_virtual)
return false;
if(fields != rhs.fields)
return false;
// We need to compare the constraint maps manually here. The reason is that the values are pointers and the default implementation
// would compare the pointers not the actual objects.
if(m_constraints.size() != rhs.m_constraints.size())
return false;
for(auto it=m_constraints.cbegin();it!=m_constraints.end();++it)
{
// For each element in this map we get the list of all elements with the same key from the other map.
// Then we loop through that list and check if we find an element of the same type which produces the same SQL substring. We use this
// approach to avoid casting both objects to their actual type, then dereferencing it etc.
auto range = rhs.m_constraints.equal_range(it->first);
bool found_something = false;
for(auto jt=range.first;jt!=range.second;++jt)
{
if(it->second->type() == jt->second->type() && it->second->toSql(it->first) == jt->second->toSql(jt->first))
{
found_something = true;
break;
}
}
// If no match was found, the constraint maps aren't equal
if(!found_something)
return false;
}
return true;
}
StringVector Table::fieldList() const
{
StringVector sl;
for(const Field& f : fields)
sl.push_back(f.toString());
return sl;
}
StringVector Table::fieldNames() const
{
StringVector sl;
for(const Field& f : fields)
sl.push_back(f.name());
return sl;
}
StringVector Table::rowidColumns() const
{
// For WITHOUT ROWID tables this function returns the names of the primary key column. For ordinary tables with a rowid column, it returns "_rowid_"
if(m_withoutRowid)
return primaryKey();
else
return {"_rowid_"};
}
FieldInfoList Table::fieldInformation() const
{
FieldInfoList result;
for(const Field& f : fields)
result.emplace_back(f.name(), f.type(), f.toString(" ", " "));
return result;
}
bool Table::hasAutoIncrement() const
{
return std::any_of(fields.begin(), fields.end(), [](const Field& f) {return f.autoIncrement(); });
}
TablePtr Table::parseSQL(const std::string& sSQL)
{
SetLocaleToC locale;
std::stringstream s;
s << sSQL;
Sqlite3Lexer lex(s);
Sqlite3Parser parser(lex);
antlr::ASTFactory ast_factory;
parser.initializeASTFactory(ast_factory);
parser.setASTFactory(&ast_factory);
try
{
if(sSQL.find("[ blank]") != sSQL.npos)
{
int a = 0;
a++;
}
parser.createtable();
CreateTableWalker ctw(parser.getAST());
auto t = ctw.table();
t->setOriginalSql(sSQL);
return t;
}
catch(antlr::ANTLRException& ex)
{
std::cerr << "Sqlite parse error: " << ex.toString() << "(" << sSQL << ")" << std::endl;
}
catch(...)
{
std::cerr << "Sqlite parse error: " << sSQL << std::endl; //TODO
}
return TablePtr(new Table(""));
}
std::string Table::sql(const std::string& schema, bool ifNotExists) const
{
// Special handling for virtual tables: just build an easy create statement and copy the using part in there
if(isVirtual())
return "CREATE VIRTUAL TABLE " + ObjectIdentifier(schema, m_name).toString(true) + " USING " + m_virtual + ";";
// This is a normal table, not a virtual one
std::string sql = "CREATE TABLE ";
if(ifNotExists)
sql += "IF NOT EXISTS ";
sql += ObjectIdentifier(schema, m_name).toString(true);
sql += " (\n";
sql += joinStringVector(fieldList(), ",\n");
// Constraints
ConstraintMap::const_iterator it = m_constraints.cbegin();
bool autoincrement = hasAutoIncrement();
while(it != m_constraints.cend())
{
// Ignore auto increment primary key constraint
if((!autoincrement || it->second->type() != Constraint::PrimaryKeyConstraintType))
{
// Ignore all constraints without any fields, except for check constraints which don't rely on a field vector
if(!(it->first.empty() && it->second->type() != Constraint::CheckConstraintType))
{
sql += ",\n\t";
sql += it->second->toSql(it->first);
}
}
++it;
}
sql += "\n)";
// without rowid
if(withoutRowidTable())
sql += " WITHOUT ROWID";
return sql + ";";
}
void Table::addConstraint(const StringVector& vStrFields, ConstraintPtr constraint)
{
m_constraints.insert({vStrFields, constraint});
}
void Table::setConstraint(const StringVector& vStrFields, ConstraintPtr constraint)
{
// Delete any old constraints of this type for these fields
removeConstraints(vStrFields, constraint->type());
// Add the new constraint to the table, effectively overwriting all old constraints for that fields/type combination
addConstraint(vStrFields, constraint);
}
void Table::removeConstraints(const StringVector& vStrFields, Constraint::ConstraintTypes type)
{
for(auto it = m_constraints.begin();it!=m_constraints.end();)
{
if(it->first == vStrFields && it->second->type() == type)
m_constraints.erase(it++);
else
++it;
}
}
ConstraintPtr Table::constraint(const StringVector& vStrFields, Constraint::ConstraintTypes type) const
{
auto list = constraints(vStrFields, type);
if(list.size())
return list.at(0);
else
return ConstraintPtr(nullptr);
}
std::vector<ConstraintPtr> Table::constraints(const StringVector& vStrFields, Constraint::ConstraintTypes type) const
{
ConstraintMap::const_iterator begin, end;
if(vStrFields.empty())
{
begin = m_constraints.begin();
end = m_constraints.end();
} else {
std::tie(begin, end) = m_constraints.equal_range(vStrFields);
}
std::vector<ConstraintPtr> clist;
std::transform(begin, end, std::back_inserter(clist), [](std::pair<StringVector, ConstraintPtr> elem){return elem.second;});
if(type == Constraint::NoType)
{
return clist;
} else {
std::vector<ConstraintPtr> clist_typed;
for(const ConstraintPtr& ptr : clist)
{
if(ptr->type() == type)
clist_typed.push_back(ptr);
}
return clist_typed;
}
}
void Table::setConstraints(const ConstraintMap& constraints)
{
m_constraints = constraints;
}
StringVector& Table::primaryKeyRef()
{
return const_cast<StringVector&>(static_cast<const Table*>(this)->primaryKey());
}
const StringVector& Table::primaryKey() const
{
auto it = m_constraints.cbegin();
while(it != m_constraints.cend())
{
if(it->second->type() == Constraint::PrimaryKeyConstraintType)
return it->first;
++it;
}
static StringVector emptyFieldVector;
return emptyFieldVector;
}
void Table::removeKeyFromAllConstraints(const std::string& key)
{
// First remove all constraints with exactly that one key
m_constraints.erase({key});
// Then delete all occurrences of the key in compound columns
for(auto it=m_constraints.begin();it!=m_constraints.end();)
{
if(contains(it->first, key))
{
StringVector k = it->first;
k.erase(std::remove(k.begin(), k.end(), key), k.end());
m_constraints.insert({k, it->second});
it = m_constraints.erase(it);
} else {
++it;
}
}
}
void Table::renameKeyInAllConstraints(const std::string& key, const std::string& to)
{
// Do nothing if the key hasn't really changed
if(key == to)
return;
// Find all occurrences of the key and change it to the new one
for(auto it=m_constraints.begin();it!=m_constraints.end();)
{
if(contains(it->first, key))
{
StringVector k = it->first;
std::replace(k.begin(), k.end(), key, to);
m_constraints.insert({k, it->second});
it = m_constraints.erase(it);
} else {
++it;
}
}
}
namespace
{
std::string unescape_identifier(std::string str, char quote_char)
{
std::string quote(2, quote_char);
size_t pos = 0;
while((pos = str.find(quote, pos)) != std::string::npos)
{
str.erase(pos, 1);
pos += 1; // Don't remove the other quote char too
}
return str;
}
std::string identifier(antlr::RefAST ident)
{
std::string sident = ident->getText();
if(ident->getType() == sqlite3TokenTypes::QUOTEDID ||
ident->getType() == Sqlite3Lexer::QUOTEDLITERAL ||
ident->getType() == sqlite3TokenTypes::STRINGLITERAL)
{
// Remember the way the identifier is quoted
char quoteChar = sident.at(0);
// Remove first and final character, i.e. the quotes
sident = sident.substr(1, sident.size() - 2);
// 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 = unescape_identifier(sident, quoteChar);
}
return sident;
}
std::string textAST(antlr::RefAST t)
{
// When this is called for a KEYWORDASTABLENAME token, we must take the child's content to get the actual value
// instead of 'KEYWORDASTABLENAME' as a string. The same applies for KEYWORDASCOLUMNNAME tokens.
if(t != antlr::nullAST && (t->getType() == sqlite3TokenTypes::KEYWORDASTABLENAME || t->getType() == sqlite3TokenTypes::KEYWORDASCOLUMNNAME))
return t->getFirstChild()->getText();
else
return t->getText();
}
std::string concatTextAST(antlr::RefAST t, bool withspace = false)
{
StringVector stext;
while(t != antlr::nullAST)
{
stext.push_back(textAST(t));
t = t->getNextSibling();
}
return joinStringVector(stext, withspace ? " " : "");
}
std::string concatExprAST(antlr::RefAST t)
{
std::string expr;
int num_paren = 1;
while(t)
{
if(t->getType() == sqlite3TokenTypes::LPAREN)
num_paren++;
else if(t->getType() == sqlite3TokenTypes::RPAREN)
num_paren--;
if(num_paren == 0)
break;
switch(t->getType())
{
case sqlite3TokenTypes::AND:
case sqlite3TokenTypes::OR:
case sqlite3TokenTypes::IN:
case sqlite3TokenTypes::LIKE:
case sqlite3TokenTypes::MATCH:
case sqlite3TokenTypes::REGEXP:
case sqlite3TokenTypes::EXISTS:
case sqlite3TokenTypes::GLOB:
case sqlite3TokenTypes::BETWEEN:
expr += " " + textAST(t) + " ";
break;
case sqlite3TokenTypes::NOT:
expr += " " + textAST(t);
break;
default:
expr += textAST(t);
}
t = t->getNextSibling();
}
return expr;
}
}
namespace {
std::string tablename(const antlr::RefAST& n)
{
if(n->getType() == sqlite3TokenTypes::KEYWORDASTABLENAME)
return concatTextAST(n->getFirstChild());
else
return identifier(n);
}
std::string columnname(const antlr::RefAST& n)
{
if(n->getType() == sqlite3TokenTypes::KEYWORDASCOLUMNNAME)
return concatTextAST(n->getFirstChild());
else if(n->getType() == sqlite3TokenTypes::INDEXEDCOLUMN)
return columnname(n->getFirstChild());
else
return identifier(n);
}
}
TablePtr CreateTableWalker::table()
{
Table* tab = new Table("");
tab->setFullyParsed(true);
if( m_root ) //CREATE TABLE
{
antlr::RefAST s = m_root->getFirstChild();
// If the primary tree isn't filled, this isn't a normal CREATE TABLE statement. Switch to the next alternative tree.
if(s == nullptr)
s = m_root->getNextSibling();
// Skip to table name
bool is_virtual_table = false;
while(s->getType() != Sqlite3Lexer::ID &&
s->getType() != Sqlite3Lexer::QUOTEDID &&
s->getType() != Sqlite3Lexer::QUOTEDLITERAL &&
s->getType() != Sqlite3Lexer::STRINGLITERAL &&
s->getType() != sqlite3TokenTypes::KEYWORDASTABLENAME)
{
// Is this one of these virtual tables?
if(s->getType() == Sqlite3Lexer::VIRTUAL)
is_virtual_table = true;
s = s->getNextSibling();
}
// Extract and set table name
tab->setName(tablename(s));
// Special handling for virtual tables. If this is a virtual table, extract the USING part and skip all the
// rest of this function because virtual tables don't have column definitons
if(is_virtual_table)
{
s = s->getNextSibling(); // USING
s = s->getNextSibling(); // module name
tab->setVirtualUsing(concatTextAST(s, true));
tab->setFullyParsed(false);
return TablePtr(tab);
}
// This is a normal table, not a virtual one
s = s->getNextSibling(); // LPAREN
s = s->getNextSibling(); // first column name
antlr::RefAST column = s;
// loop columndefs
while(column != antlr::nullAST && column->getType() == sqlite3TokenTypes::COLUMNDEF)
{
parsecolumn(tab, column->getFirstChild());
column = column->getNextSibling(); //COMMA or RPAREN
column = column->getNextSibling(); //null or tableconstraint
s = s->getNextSibling(); // COLUMNDEF
s = s->getNextSibling(); // COMMA or RPAREN
}
// 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();
// Extract constraint name, if there is any
std::string constraint_name;
if(tc->getType() == sqlite3TokenTypes::CONSTRAINT)
{
tc = tc->getNextSibling(); // CONSTRAINT
constraint_name = identifier(tc);
tc = tc->getNextSibling(); // identifier
}
switch(tc->getType())
{
case sqlite3TokenTypes::PRIMARY:
{
PrimaryKeyConstraint* pk = new PrimaryKeyConstraint;
pk->setName(constraint_name);
tc = tc->getNextSibling()->getNextSibling(); // skip primary and key
tc = tc->getNextSibling(); // skip LPAREN
StringVector fields;
do
{
antlr::RefAST indexed_column = tc->getFirstChild();
std::string col = columnname(indexed_column);
fields.push_back(col);
indexed_column = indexed_column->getNextSibling();
if(indexed_column != antlr::nullAST
&& (indexed_column->getType() == sqlite3TokenTypes::ASC
|| indexed_column->getType() == sqlite3TokenTypes::DESC))
{
// TODO save ASC / DESC information?
tab->setFullyParsed(false);
indexed_column = indexed_column->getNextSibling();
}
if(indexed_column != antlr::nullAST && indexed_column->getType() == sqlite3TokenTypes::COLLATE)
{
indexed_column = indexed_column->getNextSibling(); // COLLATE
// TODO save collation name
tab->setFullyParsed(false);
indexed_column = indexed_column->getNextSibling(); // collation name
}
if(indexed_column != antlr::nullAST && indexed_column->getType() == sqlite3TokenTypes::AUTOINCREMENT)
{
auto field = findField(tab, col);
field->setAutoIncrement(true);
indexed_column = indexed_column->getNextSibling();
}
tc = tc->getNextSibling(); // indexed column
while(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::COMMA)
{
tc = tc->getNextSibling(); // skip ident and comma
}
} while(tc != antlr::nullAST && tc->getType() != sqlite3TokenTypes::RPAREN);
// We're either done now or there is a conflict clause
tc = tc->getNextSibling(); // skip RPAREN
pk->setConflictAction(parseConflictClause(tc));
tab->addConstraint(fields, ConstraintPtr(pk));
}
break;
case sqlite3TokenTypes::UNIQUE:
{
UniqueConstraint* unique = new UniqueConstraint;
unique->setName(constraint_name);
tc = tc->getNextSibling(); // skip UNIQUE
tc = tc->getNextSibling(); // skip LPAREN
StringVector fields;
do
{
antlr::RefAST indexed_column = tc->getFirstChild();
std::string col = columnname(indexed_column);
auto field = findField(tab, col);
fields.push_back(field->name());
indexed_column = indexed_column->getNextSibling();
if(indexed_column != antlr::nullAST
&& (indexed_column->getType() == sqlite3TokenTypes::ASC
|| indexed_column->getType() == sqlite3TokenTypes::DESC))
{
// TODO save ASC / DESC information?
tab->setFullyParsed(false);
indexed_column = indexed_column->getNextSibling();
}
if(indexed_column != antlr::nullAST && indexed_column->getType() == sqlite3TokenTypes::COLLATE)
{
indexed_column = indexed_column->getNextSibling(); // COLLATE
// TODO save collation name
tab->setFullyParsed(false);
indexed_column = indexed_column->getNextSibling(); // collation name
}
tc = tc->getNextSibling(); // indexed column
while(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::COMMA)
{
tc = tc->getNextSibling(); // skip ident and comma
}
} while(tc != antlr::nullAST && tc->getType() != sqlite3TokenTypes::RPAREN);
if(fields.size() == 1 && constraint_name.empty())
{
findField(tab, fields[0])->setUnique(true);
delete unique;
} else {
tab->addConstraint(fields, ConstraintPtr(unique));
}
}
break;
case sqlite3TokenTypes::FOREIGN:
{
ForeignKeyClause* fk = new ForeignKeyClause;
fk->setName(constraint_name);
tc = tc->getNextSibling(); // FOREIGN
tc = tc->getNextSibling(); // KEY
tc = tc->getNextSibling(); // LPAREN
StringVector fields;
do
{
std::string col = columnname(tc);
fields.push_back(findField(tab, col)->name());
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);
tc = tc->getNextSibling();
tc = tc->getNextSibling(); // REFERENCES
fk->setTable(identifier(tc));
tc = tc->getNextSibling(); // identifier
if(tc != antlr::nullAST && tc->getType() == sqlite3TokenTypes::LPAREN)
{
tc = tc->getNextSibling(); // LPAREN
StringVector 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->addConstraint(fields, ConstraintPtr(fk));
}
break;
case sqlite3TokenTypes::CHECK:
{
CheckConstraint* check = new CheckConstraint;
check->setName(constraint_name);
tc = tc->getNextSibling(); // skip CHECK
tc = tc->getNextSibling(); // skip LPAREN
check->setExpression(concatExprAST(tc));
tab->addConstraint(StringVector(), ConstraintPtr(check));
}
break;
default:
{
std::cout << "unknown table constraint in " << tab->name() << std::endl;
tab->setFullyParsed(false);
}
break;
}
s = s->getNextSibling(); //COMMA or RPAREN
if(s->getType() == sqlite3TokenTypes::COMMA || s->getType() == sqlite3TokenTypes::RPAREN)
s = s->getNextSibling();
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