/** Creates a OpTypes.SEQUENCE expression */
ExpressionColumn(NumberSequence sequence, int opType) {
super(opType);
this.sequence = sequence;
dataType = sequence.getDataType();
}
void collectObjectNames(Set set) {
switch (opType) {
case OpTypes.SEQUENCE:
HsqlName name = sequence.getName();
set.add(name);
return;
case OpTypes.MULTICOLUMN:
case OpTypes.DYNAMIC_PARAM:
case OpTypes.ASTERISK:
case OpTypes.SIMPLE_COLUMN:
case OpTypes.COALESCE:
break;
case OpTypes.PARAMETER:
case OpTypes.VARIABLE:
break;
case OpTypes.COLUMN:
set.add(column.getName());
if (column.getName().parent != null) {
set.add(column.getName().parent);
}
return;
}
}
public Object getSequenceValue(NumberSequence sequence) throws HsqlException {
if (sequenceMap == null) {
sequenceMap = new HashMap();
sequenceUpdateSet = new OrderedHashSet();
}
HsqlName key = sequence.getName();
Object value = sequenceMap.get(key);
if (value == null) {
value = sequence.getValueObject();
sequenceMap.put(key, value);
sequenceUpdateSet.add(sequence);
}
return value;
}
protected String describe(Session session, int blanks) {
StringBuffer sb = new StringBuffer(64);
sb.append('\n');
for (int i = 0; i < blanks; i++) {
sb.append(' ');
}
switch (opType) {
case OpTypes.DEFAULT:
sb.append(Tokens.T_DEFAULT);
break;
case OpTypes.ASTERISK:
sb.append("OpTypes.ASTERISK ");
break;
case OpTypes.VARIABLE:
sb.append("VARIABLE: ");
sb.append(column.getName().name);
break;
case OpTypes.PARAMETER:
sb.append(Tokens.T_PARAMETER).append(": ");
sb.append(column.getName().name);
break;
case OpTypes.COALESCE:
sb.append(Tokens.T_COLUMN).append(": ");
sb.append(columnName);
if (alias != null) {
sb.append(" AS ").append(alias.name);
}
break;
case OpTypes.COLUMN:
sb.append(Tokens.T_COLUMN).append(": ");
sb.append(column.getName().getSchemaQualifiedStatementName());
if (alias != null) {
sb.append(" AS ").append(alias.name);
}
break;
case OpTypes.DYNAMIC_PARAM:
sb.append("DYNAMIC PARAM: ");
sb.append(", TYPE = ").append(dataType.getNameString());
break;
case OpTypes.SEQUENCE:
sb.append(Tokens.T_SEQUENCE).append(": ");
sb.append(sequence.getName().name);
break;
case OpTypes.MULTICOLUMN:
// shouldn't get here
}
return sb.toString();
}
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;
}
