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#include "sqlitecreateview.h"
#include "sqliteselect.h"
#include "sqlitequerytype.h"
#include "parser/statementtokenbuilder.h"
#include "common/global.h"
#include "sqliteindexedcolumn.h"
#include <QDebug>
SqliteCreateView::SqliteCreateView()
{
queryType = SqliteQueryType::CreateView;
}
SqliteCreateView::SqliteCreateView(const SqliteCreateView& other) :
SqliteQuery(other), tempKw(other.tempKw), temporaryKw(other.temporaryKw), ifNotExists(other.ifNotExists),
database(other.database), view(other.view)
{
DEEP_COPY_FIELD(SqliteSelect, select);
DEEP_COPY_COLLECTION(SqliteIndexedColumn, columns);
}
SqliteCreateView::SqliteCreateView(int temp, bool ifNotExists, const QString &name1, const QString &name2, SqliteSelect *select) :
SqliteCreateView()
{
this->ifNotExists = ifNotExists;
if (name2.isNull())
view = name1;
else
{
database = name1;
view = name2;
}
if (temp == 2)
temporaryKw = true;
else if (temp == 1)
tempKw = true;
this->select = select;
if (select)
select->setParent(this);
}
SqliteCreateView::SqliteCreateView(int temp, bool ifNotExists, const QString& name1, const QString& name2, SqliteSelect* select, const QList<SqliteIndexedColumn*>& columns)
: SqliteCreateView(temp, ifNotExists, name1, name2, select)
{
this->columns = columns;
for (SqliteIndexedColumn* col : columns)
col->setParent(this);
}
SqliteCreateView::~SqliteCreateView()
{
}
SqliteStatement*SqliteCreateView::clone()
{
return new SqliteCreateView(*this);
}
QStringList SqliteCreateView::getDatabasesInStatement()
{
return getStrListFromValue(database);
}
TokenList SqliteCreateView::getDatabaseTokensInStatement()
{
return getDbTokenListFromFullname();
}
QList<SqliteStatement::FullObject> SqliteCreateView::getFullObjectsInStatement()
{
QList<FullObject> result;
// View object
FullObject fullObj = getFullObjectFromFullname(FullObject::VIEW);
if (fullObj.isValid())
result << fullObj;
// Db object
fullObj = getFirstDbFullObject();
if (fullObj.isValid())
{
result << fullObj;
dbTokenForFullObjects = fullObj.database;
}
return result;
}
TokenList SqliteCreateView::rebuildTokensFromContents()
{
StatementTokenBuilder builder;
builder.withTokens(SqliteQuery::rebuildTokensFromContents());
builder.withKeyword("CREATE").withSpace();
if (tempKw)
builder.withKeyword("TEMP").withSpace();
else if (temporaryKw)
builder.withKeyword("TEMPORARY").withSpace();
builder.withKeyword("VIEW").withSpace();
if (ifNotExists)
builder.withKeyword("IF").withSpace().withKeyword("NOT").withSpace().withKeyword("EXISTS").withSpace();
if (!database.isNull())
builder.withOther(database).withOperator(".");
builder.withOther(view).withSpace();
if (columns.size() > 0)
builder.withParLeft().withStatementList<SqliteIndexedColumn>(columns).withParRight().withSpace();
builder.withKeyword("AS").withStatement(select);
builder.withOperator(";");
return builder.build();
}
QString SqliteCreateView::getTargetDatabase() const
{
return database;
}
void SqliteCreateView::setTargetDatabase(const QString& database)
{
this->database = database;
}
QString SqliteCreateView::getObjectName() const
{
return view;
}
void SqliteCreateView::setObjectName(const QString& name)
{
view = name;
}
TokenList SqliteCreateView::equivalentSelectTokens() const
{
if (columns.size() == 0)
return select->tokens;
SqliteSelect::Core *core = select->coreSelects.first();
bool hasStar = std::any_of(core->resultColumns.cbegin(),
core->resultColumns.cend(),
[](auto col) { return col->star; });
bool useCTE = false;
if (!hasStar && columns.size() != core->resultColumns.size())
{
qWarning() << "View with a column list clause and non-matching count of columns in SELECT. "
<< "Expect an error if result column count does not match column list length.";
useCTE = true;
}
if (hasStar)
{
qWarning() << "View with a column list clause and SELECT *. "
<< "Expect an error if result column count does not match column list length.";
useCTE = true;
}
if (useCTE)
{
StatementTokenBuilder builder;
builder.withKeyword("WITH").withSpace().withOther(view).withParLeft();
bool first = true;
for (SqliteIndexedColumn *column : columns)
{
if (!first)
builder.withOperator(",");
first = false;
builder.withOther(column->name);
}
builder.withParRight().withKeyword("AS").withParLeft().withTokens(select->tokens).withParRight()
.withKeyword("SELECT").withSpace().withOperator("*").withSpace()
.withKeyword("FROM").withSpace().withOther(view);
return builder.build();
}
// There are no * in SELECT, and view column list length matches SELECT column list length.
// Apply view column names to SELECT as aliases.
SqliteSelect* selectCopy = dynamic_cast<SqliteSelect*>(select->clone());
QList<SqliteSelect::Core::ResultColumn*> resultColumns = selectCopy->coreSelects.first()->resultColumns;
int n = 0;
for (SqliteSelect::Core::ResultColumn* column : resultColumns)
{
column->asKw = true;
column->alias = columns.at(n++)->name;
}
selectCopy->rebuildTokens();
return selectCopy->tokens;
}
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