SelectListColumnResolver(Select select) {
this.select = select;
int columnCount = select.getColumnCount();
columns = new Column[columnCount];
expressions = new Expression[columnCount];
ArrayList<Expression> columnList = select.getExpressions();
for (int i = 0; i < columnCount; i++) {
Expression expr = columnList.get(i);
Column column = new Column(expr.getAlias(), Value.NULL);
column.setTable(null, i);
columns[i] = column;
expressions[i] = expr.getNonAliasExpression();
}
}
