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#include "sqlitetypes.h"
#include "ObjectIdentifier.h"
#include "parser/ParserDriver.h"
#include <iostream>
#include <iterator>
#include <numeric>
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;
});
}
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 std::string();
}
ConstraintPtr Constraint::makeConstraint(ConstraintTypes type)
{
switch(type)
{
case PrimaryKeyConstraintType:
return std::make_shared<PrimaryKeyConstraint>();
case UniqueConstraintType:
return std::make_shared<UniqueConstraint>();
case ForeignKeyConstraintType:
return std::make_shared<ForeignKeyClause>();
case CheckConstraintType:
return std::make_shared<CheckConstraint>();
default:
return nullptr;
}
}
void Constraint::replaceInColumnList(const std::string& from, const std::string& to)
{
std::replace(column_list.begin(), column_list.end(), from, to);
}
void Constraint::removeFromColumnList(const std::string& key)
{
column_list.erase(std::remove(column_list.begin(), column_list.end(), key), column_list.end());
}
bool ForeignKeyClause::isSet() const
{
return m_override.size() || m_table.size();
}
std::string ForeignKeyClause::toString() const
{
if(!isSet())
return std::string();
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
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "FOREIGN KEY(" + joinStringVector(escapeIdentifier(column_list), ",") + ") REFERENCES " + this->toString();
return result;
}
UniqueConstraint::UniqueConstraint(const IndexedColumnVector& columns) :
m_columns(columns)
{
// Extract column names and give them to the column list in the base class
for(const auto& c : columns)
column_list.push_back(c.name());
}
UniqueConstraint::UniqueConstraint(const StringVector& columns) :
Constraint(columns)
{
setColumnList(columns);
}
void UniqueConstraint::setColumnList(const StringVector& list)
{
Constraint::setColumnList(list);
// Create our own column list without sort orders etc
m_columns.clear();
for(const auto& c : list)
m_columns.push_back(IndexedColumn(c, false));
}
void UniqueConstraint::addToColumnList(const std::string& key)
{
Constraint::addToColumnList(key);
// Also add to our own column list
m_columns.push_back(IndexedColumn(key, false));
}
void UniqueConstraint::replaceInColumnList(const std::string& from, const std::string& to)
{
Constraint::replaceInColumnList(from, to);
for(auto& c : m_columns)
{
if(c.name() == from)
c.setName(to);
}
}
void UniqueConstraint::removeFromColumnList(const std::string& key)
{
Constraint::removeFromColumnList(key);
m_columns.erase(std::remove_if(m_columns.begin(), m_columns.end(), [key](const IndexedColumn& c) {
if(c.name() == key)
return true;
else
return false;
}), m_columns.end());
}
std::string UniqueConstraint::toSql() const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
std::vector<std::string> u_columns;
for(const auto& c : m_columns)
u_columns.push_back(c.toString("", " "));
result += "UNIQUE(" + joinStringVector(u_columns, ",") + ")";
if(!m_conflictAction.empty())
result += " ON CONFLICT " + m_conflictAction;
return result;
}
PrimaryKeyConstraint::PrimaryKeyConstraint(const IndexedColumnVector& columns) :
UniqueConstraint(columns),
m_auto_increment(false)
{
}
PrimaryKeyConstraint::PrimaryKeyConstraint(const StringVector& columns) :
UniqueConstraint(columns),
m_auto_increment(false)
{
}
std::string PrimaryKeyConstraint::toSql() const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
std::vector<std::string> pk_columns;
for(const auto& c : m_columns)
pk_columns.push_back(c.toString("", " "));
result += "PRIMARY KEY(" + joinStringVector(pk_columns, ",") + (m_auto_increment ? " AUTOINCREMENT" : "") + ")";
if(!m_conflictAction.empty())
result += " ON CONFLICT " + m_conflictAction;
return result;
}
std::string CheckConstraint::toSql() 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_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_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;
}
Field::Affinity Field::affinity() const
{
if (isInteger()) return IntegerAffinity;
if (isText()) return TextAffinity;
if (isBlob()) return BlobAffinity;
if (isReal() || isNumeric()) return FloatAffinity;
return BlobAffinity;
}
Table::Table(const Table& table)
: Object(table.name())
{
*this = table;
}
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;
if(m_constraints != rhs.m_constraints)
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 const_cast<Table*>(this)->primaryKey()->columnList();
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;
}
TablePtr Table::parseSQL(const std::string& sSQL)
{
parser::ParserDriver drv;
if(!drv.parse(sSQL))
{
TablePtr t = std::dynamic_pointer_cast<Table>(drv.result);
t->setOriginalSql(sSQL);
return t;
} else {
std::cerr << "Sqlite parse error: " << sSQL << std::endl;
return std::make_shared<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
for(const auto& it : m_constraints)
{
// Ignore all constraints without any fields, except for check constraints which don't rely on a field vector
if(!it->columnList().empty() || it->type() == Constraint::CheckConstraintType)
{
sql += ",\n\t";
sql += it->toSql();
}
}
sql += "\n)";
// without rowid
if(withoutRowidTable())
sql += " WITHOUT ROWID";
return sql + ";";
}
void Table::addConstraint(ConstraintPtr constraint)
{
m_constraints.insert(constraint);
}
void Table::setConstraint(ConstraintPtr constraint)
{
// Delete any old constraints of this type for these fields
removeConstraints(constraint->columnList(), constraint->type());
// Add the new constraint to the table, effectively overwriting all old constraints for that fields/type combination
addConstraint(constraint);
}
void Table::removeConstraint(ConstraintPtr constraint)
{
for(auto it = m_constraints.begin();it!=m_constraints.end();++it)
{
if((*it)->toSql() == constraint->toSql())
{
m_constraints.erase(it);
// Only remove the first constraint matching these criteria
return;
}
}
}
void Table::removeConstraints(const StringVector& vStrFields, Constraint::ConstraintTypes type)
{
for(auto it = m_constraints.begin();it!=m_constraints.end();)
{
if((*it)->columnList() == vStrFields && (*it)->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
{
std::vector<ConstraintPtr> clist;
for(const auto& it : m_constraints)
{
if((type == Constraint::NoType || it->type() == type) && (vStrFields.empty() || it->columnList() == vStrFields))
clist.push_back(it);
}
return clist;
}
void Table::setConstraints(const ConstraintSet& constraints)
{
m_constraints = constraints;
}
void Table::replaceConstraint(ConstraintPtr from, ConstraintPtr to)
{
auto it = m_constraints.find(from);
if(it == m_constraints.end())
return;
m_constraints.erase(it); // Erase old constraint
m_constraints.insert(to); // Insert new constraint
}
std::shared_ptr<PrimaryKeyConstraint> Table::primaryKey()
{
const auto c = constraint({}, Constraint::PrimaryKeyConstraintType);
if(c)
return std::dynamic_pointer_cast<PrimaryKeyConstraint>(c);
else
return nullptr;
}
void Table::removeKeyFromAllConstraints(const std::string& key)
{
// Update all constraints
for(auto it=m_constraints.begin();it!=m_constraints.end();)
{
// Check if they contain the old key name
if(contains((*it)->columnList(), key))
{
// If so, remove it from the column list
(*it)->removeFromColumnList(key);
// If the column list is empty now, remove the entire constraint. Otherwise save the updated column list
if((*it)->columnList().empty())
it = m_constraints.erase(it);
else
++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)
{
if(contains(it->columnList(), key))
it->replaceInColumnList(key, to);
}
}
std::string IndexedColumn::toString(const std::string& indent, const std::string& sep) const
{
std::string name = m_isExpression ? m_name : escapeIdentifier(m_name);
std::string order = (m_order.empty() ? "" : (sep + m_order));
return indent + name + order;
}
Index& Index::operator=(const Index& rhs)
{
// Base class
Object::operator=(rhs);
// Just assign the easy stuff
m_unique = rhs.m_unique;
m_table = rhs.m_table;
m_whereExpr = rhs.m_whereExpr;
// Make copies of the column
std::copy(rhs.fields.begin(), rhs.fields.end(), std::back_inserter(fields));
return *this;
}
StringVector Index::columnSqlList() const
{
StringVector sl;
for(const IndexedColumn& c : fields)
sl.push_back(c.toString());
return sl;
}
std::string Index::sql(const std::string& schema, bool ifNotExists) const
{
// Start CREATE (UNIQUE) INDEX statement
std::string sql;
if(m_unique)
sql = "CREATE UNIQUE INDEX ";
else
sql = "CREATE INDEX ";
if(ifNotExists)
sql += "IF NOT EXISTS ";
sql += ObjectIdentifier(schema, m_name).toString(true);
sql += " ON ";
sql += sqlb::escapeIdentifier(m_table);
sql += " (\n";
// Add column list
sql += joinStringVector(columnSqlList(), ",\n");
// Add partial index bit
sql += "\n)";
if(!m_whereExpr.empty())
sql += " WHERE " + m_whereExpr;
return sql + ";";
}
FieldInfoList Index::fieldInformation() const
{
FieldInfoList result;
for(const IndexedColumn& c : fields)
result.emplace_back(c.name(), c.order(), c.toString(" ", " "));
return result;
}
IndexPtr Index::parseSQL(const std::string& sSQL)
{
parser::ParserDriver drv;
if(!drv.parse(sSQL))
{
IndexPtr i = std::dynamic_pointer_cast<Index>(drv.result);
i->setOriginalSql(sSQL);
return i;
} else {
std::cerr << "Sqlite parse error: " << sSQL << std::endl;
return std::make_shared<Index>("");
}
}
ViewPtr View::parseSQL(const std::string& sSQL)
{
// TODO
auto v = std::make_shared<View>("");
v->setOriginalSql(sSQL);
return v;
}
StringVector View::fieldNames() const
{
StringVector sl;
for(const Field& f : fields)
sl.push_back(f.name());
return sl;
}
FieldInfoList View::fieldInformation() const
{
FieldInfoList result;
for(const Field& f : fields)
result.emplace_back(f.name(), f.type(), f.toString(" ", " "));
return result;
}
TriggerPtr Trigger::parseSQL(const std::string& sSQL)
{
// TODO
auto t = std::make_shared<Trigger>("");
t->setOriginalSql(sSQL);
return t;
}
} //namespace sqlb
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