/** Creates a OpTypes.SEQUENCE expression */
ExpressionColumn(NumberSequence sequence, int opType) {
super(opType);
this.sequence = sequence;
dataType = sequence.getDataType();
}
public HsqlList resolveColumnReferences(
Session session,
RangeVariable[] rangeVarArray,
int rangeCount,
HsqlList unresolvedSet,
boolean acceptsSequences) {
switch (opType) {
case OpTypes.SEQUENCE:
if (!acceptsSequences) {
throw Error.error(ErrorCode.X_42598);
}
break;
case OpTypes.ROWNUM:
case OpTypes.MULTICOLUMN:
case OpTypes.DYNAMIC_PARAM:
case OpTypes.ASTERISK:
case OpTypes.SIMPLE_COLUMN:
case OpTypes.COALESCE:
case OpTypes.DIAGNOSTICS_VARIABLE:
break;
case OpTypes.COLUMN:
case OpTypes.PARAMETER:
case OpTypes.VARIABLE:
{
boolean resolved = false;
boolean tableQualified = tableName != null;
if (rangeVariable != null) {
return unresolvedSet;
}
for (int i = 0; i < rangeCount; i++) {
RangeVariable rangeVar = rangeVarArray[i];
if (rangeVar == null) {
continue;
}
if (resolved) {
if (session.database.sqlEnforceRefs) {
if (resolvesDuplicateColumnReference(rangeVar)) {
String message = getColumnName();
if (alias != null) {
StringBuffer sb = new StringBuffer(message);
sb.append(' ').append(Tokens.T_AS).append(' ').append(alias.getStatementName());
message = sb.toString();
}
throw Error.error(ErrorCode.X_42580, message);
}
}
} else {
if (resolveColumnReference(rangeVar)) {
if (tableQualified) {
return unresolvedSet;
}
resolved = true;
continue;
}
}
}
if (resolved) {
return unresolvedSet;
}
if (session.database.sqlSyntaxOra) {
if (acceptsSequences && tableName != null) {
if (Tokens.T_CURRVAL.equals(columnName)) {
NumberSequence seq =
session.database.schemaManager.getSequence(
tableName, session.getSchemaName(schema), false);
if (seq != null) {
opType = OpTypes.SEQUENCE_CURRENT;
dataType = seq.getDataType();
sequence = seq;
schema = null;
tableName = null;
columnName = null;
resolved = true;
}
} else if (Tokens.T_NEXTVAL.equals(columnName)) {
NumberSequence seq =
session.database.schemaManager.getSequence(
tableName, session.getSchemaName(schema), false);
if (seq != null) {
opType = OpTypes.SEQUENCE;
dataType = seq.getDataType();
sequence = seq;
schema = null;
tableName = null;
columnName = null;
resolved = true;
}
}
}
}
if (resolved) {
return unresolvedSet;
}
if (unresolvedSet == null) {
unresolvedSet = new ArrayListIdentity();
}
unresolvedSet.add(this);
}
}
return unresolvedSet;
}
