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693 lines (578 loc) · 20.6 KB
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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;
});
}
std::string joinStringVector(const IndexedColumnVector& vec, const std::string& delim)
{
return std::accumulate(vec.begin(), vec.end(), std::string(), [delim](const std::string& so_far, const IndexedColumn& c) {
return so_far.empty() ? c.toString("", " ") : so_far + delim + c.toString("", "");
});
}
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 ForeignKeyClause::toString() const
{
std::string result = escapeIdentifier(m_table);
if(m_columns.size())
result += "(" + joinStringVector(escapeIdentifier(m_columns), ",") + ")";
if(m_constraint.size())
result += " " + m_constraint;
return result;
}
std::string ForeignKeyClause::toSql(const StringVector& columns) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "FOREIGN KEY(" + joinStringVector(escapeIdentifier(columns), ",") + ") REFERENCES " + this->toString();
return result;
}
std::string UniqueConstraint::toSql(const IndexedColumnVector& columns) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "UNIQUE";
if(columns.size())
result += "(" + joinStringVector(columns, ",") + ")";
if(!m_conflictAction.empty())
result += " ON CONFLICT " + m_conflictAction;
return result;
}
std::string NotNullConstraint::toSql() const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "NOT NULL";
if(!m_conflictAction.empty())
result += " ON CONFLICT " + m_conflictAction;
return result;
}
std::string PrimaryKeyConstraint::toSql(const IndexedColumnVector& columns) const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "PRIMARY KEY(" + joinStringVector(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;
}
std::string DefaultConstraint::toSql() const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "DEFAULT " + m_value;
return result;
}
std::string CollateConstraint::toSql() const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "COLLATE " + m_collation;
return result;
}
std::string GeneratedColumnConstraint::toSql() const
{
std::string result;
if(!m_name.empty())
result = "CONSTRAINT " + escapeIdentifier(m_name) + " ";
result += "GENERATED ALWAYS AS (" + m_expression + ")" + " " + storage();
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 += " " + m_notnull->toSql();
if(m_defaultvalue)
str += " " + m_defaultvalue->toSql();
if(m_check)
str += " " + m_check->toSql();
if(m_unique)
str += " " + m_unique->toSql({});
if(m_collation)
str += " " + m_collation->toSql();
if(m_generated)
str += " " + m_generated->toSql();
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_options = rhs.m_options;
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_indexConstraints.clear();
m_foreignKeys.clear();
m_checkConstraints.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));
for(const auto& e : rhs.m_indexConstraints)
{
if(e.second->isPrimaryKey())
m_indexConstraints.insert(std::make_pair(e.first, std::make_shared<PrimaryKeyConstraint>(*std::dynamic_pointer_cast<PrimaryKeyConstraint>(e.second))));
else
m_indexConstraints.insert(std::make_pair(e.first, std::make_shared<UniqueConstraint>(*e.second)));
}
for(const auto& e : rhs.m_foreignKeys)
m_foreignKeys.insert(std::make_pair(e.first, std::make_shared<ForeignKeyClause>(*e.second)));
std::transform(rhs.m_checkConstraints.begin(), rhs.m_checkConstraints.end(), std::back_inserter(m_checkConstraints), [](const auto& e) { return std::make_shared<CheckConstraint>(*e); });
return *this;
}
bool Table::operator==(const Table& rhs) const
{
if(!Object::operator==(rhs))
return false;
if(m_options != rhs.m_options)
return false;
if(m_virtual != rhs.m_virtual)
return false;
if(fields != rhs.fields)
return false;
if(m_indexConstraints != rhs.m_indexConstraints)
return false;
if(m_foreignKeys != rhs.m_foreignKeys)
return false;
if(m_checkConstraints != rhs.m_checkConstraints)
return false;
return true;
}
StringVector Table::fieldList() const
{
StringVector sl;
std::transform(fields.begin(), fields.end(), std::back_inserter(sl), [](const auto& f) { return f.toString(); });
return sl;
}
StringVector Table::fieldNames() const
{
StringVector sl;
std::transform(fields.begin(), fields.end(), std::back_inserter(sl), [](const auto& f) { return 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(withoutRowidTable())
{
auto columns = primaryKeyColumns();
StringVector result;
std::transform(columns.begin(), columns.end(), std::back_inserter(result), [](const auto& e) { return e.name(); });
return result;
} else
return {"_rowid_"};
}
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;
TablePtr t = std::make_shared<Table>("");
t->setOriginalSql(sSQL);
return t;
}
}
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_indexConstraints)
sql += ",\n\t" + it.second->toSql(it.first);
for(const auto& it : m_foreignKeys)
sql += ",\n\t" + it.second->toSql(it.first);
for(const auto& it : m_checkConstraints)
sql += ",\n\t" + it->toSql();
sql += "\n)";
// Table options
bool first_option = true;
for(size_t i=0;i<NumOptions;i++)
{
if(m_options.test(i))
{
if(first_option)
{
sql += " ";
first_option = false;
} else {
sql += ",";
}
switch(i)
{
case WithoutRowid:
sql += "WITHOUT ROWID";
break;
case Strict:
sql += "STRICT";
break;
}
}
}
return sql + ";";
}
void Table::addConstraint(const StringVector& columns, std::shared_ptr<PrimaryKeyConstraint> constraint)
{
IndexedColumnVector c;
std::transform(columns.begin(), columns.end(), std::back_inserter(c), [](const auto& e) { return IndexedColumn(e, false); });
m_indexConstraints.insert(std::make_pair(c, constraint));
}
void Table::addConstraint(const StringVector& columns, std::shared_ptr<UniqueConstraint> constraint)
{
IndexedColumnVector c;
std::transform(columns.begin(), columns.end(), std::back_inserter(c), [](const auto& e) { return IndexedColumn(e, false); });
m_indexConstraints.insert(std::make_pair(c, constraint));
}
void Table::addConstraint(const IndexedColumnVector& columns, std::shared_ptr<ForeignKeyClause> constraint)
{
StringVector c;
std::transform(columns.begin(), columns.end(), std::back_inserter(c), [](const auto& e) { return e.name(); });
m_foreignKeys.insert(std::make_pair(c, constraint));
}
void Table::removeConstraint(std::shared_ptr<UniqueConstraint> constraint)
{
auto c = std::find_if(m_indexConstraints.begin(), m_indexConstraints.end(), [constraint](const auto& e) { return e.second == constraint; });
if(c != m_indexConstraints.end())
m_indexConstraints.erase(c);
}
void Table::removeConstraint(std::shared_ptr<ForeignKeyClause> constraint)
{
auto c = std::find_if(m_foreignKeys.begin(), m_foreignKeys.end(), [constraint](const auto& e) { return e.second == constraint; });
if(c != m_foreignKeys.end())
m_foreignKeys.erase(c);
}
void Table::removeConstraint(std::shared_ptr<CheckConstraint> constraint)
{
m_checkConstraints.erase(std::remove_if(m_checkConstraints.begin(), m_checkConstraints.end(), [constraint](const auto& e) { return e == constraint; }));
}
void Table::addKeyToConstraint(std::shared_ptr<UniqueConstraint> constraint, const std::string& key)
{
// Search for matching constraint
for(auto it=m_indexConstraints.begin();it!=m_indexConstraints.end();++it)
{
if(it->second == constraint)
{
// Add key to the column list
auto new_columns = it->first;
new_columns.emplace_back(key, false);
m_indexConstraints.insert(std::make_pair(new_columns, it->second));
it = m_indexConstraints.erase(it);
}
}
}
void Table::removeKeyFromConstraint(std::shared_ptr<UniqueConstraint> constraint, const std::string& key)
{
for(auto it=m_indexConstraints.begin();it!=m_indexConstraints.end();++it)
{
if(it->second == constraint)
{
// Remove key from the column list
std::remove_const_t<decltype(it->first)> new_columns;
std::copy_if(it->first.begin(), it->first.end(), std::back_inserter(new_columns), [key](const auto& c) { return c != key; });
// If the column list is empty now, remove the entire constraint. Otherwise save the updated column list
if(new_columns.empty())
{
it = m_indexConstraints.erase(it);
} else {
m_indexConstraints.insert(std::make_pair(new_columns, it->second));
it = m_indexConstraints.erase(it);
}
// If container is empty now, return here instead of advancing the iterator
if(m_indexConstraints.empty())
return;
}
}
}
void Table::removeKeyFromAllConstraints(const std::string& key)
{
auto match_and_remove = [key](auto& container, auto& it) {
// Check if they contain the old key name
if(contains(it->first, key))
{
// If so, remove it from the column list
std::remove_const_t<decltype(it->first)> new_columns;
std::copy_if(it->first.begin(), it->first.end(), std::back_inserter(new_columns), [key](const auto& c) { return c != key; });
// If the column list is empty now, remove the entire constraint. Otherwise save the updated column list
if(new_columns.empty())
{
it = container.erase(it);
} else {
container.insert(std::make_pair(new_columns, it->second));
it = container.erase(it);
}
// If container is empty now, return here instead of advancing the iterator
if(container.empty())
return;
}
};
for(auto it=m_indexConstraints.begin();it!=m_indexConstraints.end();++it)
match_and_remove(m_indexConstraints, it);
for(auto it=m_foreignKeys.begin();it!=m_foreignKeys.end();++it)
match_and_remove(m_foreignKeys, 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;
const auto match_and_rename = [key, to](auto& container, auto& it, const auto& rename) {
// Check if they contain the old key name
if(contains(it->first, key))
{
// If so, update it in the column list
std::remove_const_t<decltype(it->first)> new_columns;
std::transform(it->first.begin(), it->first.end(), std::back_inserter(new_columns), [rename](auto c) {
return rename(c);
});
container.insert(std::make_pair(new_columns, it->second));
it = container.erase(it);
}
};
// Update all constraints
for(auto it=m_indexConstraints.begin();it!=m_indexConstraints.end();++it)
{
match_and_rename(m_indexConstraints, it, [key, to](IndexedColumn c) {
if(c == key)
c.setName(to);
return c;
});
}
for(auto it=m_foreignKeys.begin();it!=m_foreignKeys.end();++it)
match_and_rename(m_foreignKeys, it, [key, to](const std::string& c) { return c == key ? to : c; });
}
std::shared_ptr<PrimaryKeyConstraint> Table::primaryKey() const
{
const auto it = std::find_if(m_indexConstraints.begin(), m_indexConstraints.end(), [](const auto& e) { return e.second->isPrimaryKey(); });
if(it != m_indexConstraints.end())
return std::dynamic_pointer_cast<PrimaryKeyConstraint>(it->second);
return nullptr;
}
IndexedColumnVector Table::primaryKeyColumns() const
{
const auto it = std::find_if(m_indexConstraints.begin(), m_indexConstraints.end(), [](const auto& e) { return e.second->isPrimaryKey(); });
if(it != m_indexConstraints.end())
return it->first;
return {};
}
std::shared_ptr<ForeignKeyClause> Table::foreignKey(const StringVector& columns) const
{
const auto it = std::find_if(m_foreignKeys.begin(), m_foreignKeys.end(), [columns](const auto& e) { return e.first == columns; });
if(it != m_foreignKeys.end())
return it->second;
return nullptr;
}
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;
std::transform(fields.begin(), fields.end(), std::back_inserter(sl), [](const auto& c) { return 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 + ";";
}
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;
IndexPtr i = std::make_shared<Index>("");
i->setOriginalSql(sSQL);
return i;
}
}
template<>
std::string getBaseTable<Index>(IndexPtr object)
{
return object->table();
}
ViewPtr View::parseSQL(const std::string& sSQL)
{
// TODO
auto v = std::make_shared<View>("");
v->setOriginalSql(sSQL);
return v;
}
TriggerPtr Trigger::parseSQL(const std::string& sSQL)
{
// TODO
auto t = std::make_shared<Trigger>("");
t->setOriginalSql(sSQL);
return t;
}
template<>
std::string getBaseTable<Trigger>(TriggerPtr object)
{
return object->table();
}
} //namespace sqlb
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