* Creates a RangeVariable from the parse context. <p>
*/
protected RangeVariable readTableOrSubquery() {
Table table = null;
SimpleName alias = null;
OrderedHashSet columnList = null;
BitMap columnNameQuoted = null;
SimpleName[] columnNameList = null;
if (token.tokenType == Tokens.OPENBRACKET) {
Expression e = XreadTableSubqueryOrJoinedTable();
table = e.subQuery.getTable();
if (table instanceof TableDerived) {
((TableDerived)table).dataExpression = e;
}
} else {
table = readTableName();
if (table.isView()) {
SubQuery sq = getViewSubquery((View) table);
// sq.queryExpression = ((View) table).queryExpression;
table = sq.getTable();
}
}
boolean hasAs = false;
if (token.tokenType == Tokens.AS) {
read();
checkIsNonCoreReservedIdentifier();
hasAs = true;
}
if (isNonCoreReservedIdentifier()) {
boolean limit = token.tokenType == Tokens.LIMIT
|| token.tokenType == Tokens.OFFSET;
int position = getPosition();
alias = HsqlNameManager.getSimpleName(token.tokenString,
isDelimitedIdentifier());
read();
if (token.tokenType == Tokens.OPENBRACKET) {
columnNameQuoted = new BitMap(32);
columnList = readColumnNames(columnNameQuoted, false);
} else if (!hasAs && limit) {
if (token.tokenType == Tokens.QUESTION
|| token.tokenType == Tokens.X_VALUE) {
alias = null;
rewind(position);
}
}
}
if (columnList != null) {
if (table.getColumnCount() != columnList.size()) {
throw Error.error(ErrorCode.X_42593);
}
columnNameList = new SimpleName[columnList.size()];
for (int i = 0; i < columnList.size(); i++) {
SimpleName name =
HsqlNameManager.getSimpleName((String) columnList.get(i),
columnNameQuoted.isSet(i));
columnNameList[i] = name;
}