/**
* Bind this expression. This means binding the sub-expressions, as well as figuring out what the
* return type is for this expression.
*
* @param fromList The FROM list for the query this expression is in, for binding columns.
* @param subqueryList The subquery list being built as we find SubqueryNodes
* @param aggregateVector The aggregate vector being built as we find AggregateNodes
* @return The new top of the expression tree.
* @exception StandardException Thrown on error
*/
public ValueNode bindExpression(
FromList fromList, SubqueryList subqueryList, List aggregateVector) throws StandardException {
// method invocations are not allowed in ADD TABLE clauses.
// And neither are field references.
javaNode.checkReliability(this);
/* Bind the expression under us */
javaNode = javaNode.bindExpression(fromList, subqueryList, aggregateVector);
if (javaNode instanceof StaticMethodCallNode) {
AggregateNode agg = ((StaticMethodCallNode) javaNode).getResolvedAggregate();
if (agg != null) {
return agg.bindExpression(fromList, subqueryList, aggregateVector);
}
}
DataTypeDescriptor dts = javaNode.getDataType();
if (dts == null) {
throw StandardException.newException(
SQLState.LANG_NO_CORRESPONDING_S_Q_L_TYPE, javaNode.getJavaTypeName());
}
TypeDescriptor catalogType = dts.getCatalogType();
if (catalogType.isRowMultiSet() || (catalogType.getTypeName().equals("java.sql.ResultSet"))) {
throw StandardException.newException(SQLState.LANG_TABLE_FUNCTION_NOT_ALLOWED);
}
setType(dts);
// For functions returning string types we should set the collation to match the
// java method's schema DERBY-2972. This is propogated from
// RoutineAliasInfo to javaNode.
if (dts.getTypeId().isStringTypeId()) {
this.setCollationInfo(
javaNode.getCollationType(), StringDataValue.COLLATION_DERIVATION_IMPLICIT);
}
return this;
}
