void prepareCheckConstraint(Session session, Table table, boolean checkValues) {
// to ensure no subselects etc. are in condition
check.checkValidCheckConstraint();
if (table == null) {
check.resolveTypes(session, null);
} else {
QuerySpecification s = Expression.getCheckSelect(session, table, check);
Result r = s.getResult(session, 1);
if (r.getNavigator().getSize() != 0) {
String[] info = new String[] {table.getName().name, ""};
throw Error.error(ErrorCode.X_23504, ErrorCode.CONSTRAINT, info);
}
rangeVariable = s.rangeVariables[0];
// removes reference to the Index object in range variable
rangeVariable.setForCheckConstraint();
}
if (check.getType() == OpTypes.NOT
&& check.getLeftNode().getType() == OpTypes.IS_NULL
&& check.getLeftNode().getLeftNode().getType() == OpTypes.COLUMN) {
notNullColumnIndex = check.getLeftNode().getLeftNode().getColumnIndex();
isNotNull = true;
}
}
private boolean addToIndexEndConditions(Expression e) {
if (opType == OpTypes.EQUAL || opType == OpTypes.IS_NULL) {
if (indexedColumnCount < rangeIndex.getColumnCount()) {
if (rangeIndex.getColumns()[indexedColumnCount] == e.getLeftNode().getColumnIndex()) {
Expression condition = ExpressionLogical.newNotNullCondition(e.getLeftNode());
indexCond[indexedColumnCount] = condition;
indexEndCond[indexedColumnCount] = e;
indexEndCondition = ExpressionLogical.andExpressions(indexEndCondition, e);
opType = OpTypes.NOT;
opTypes[indexedColumnCount] = OpTypes.NOT;
opTypeEnd = e.opType;
opTypesEnd[indexedColumnCount] = e.opType;
indexedColumnCount++;
return true;
}
}
}
return false;
}
boolean addToIndexConditions(Expression e) {
if (opType == OpTypes.EQUAL || opType == OpTypes.IS_NULL) {
if (indexedColumnCount < rangeIndex.getColumnCount()) {
if (rangeIndex.getColumns()[indexedColumnCount] == e.getLeftNode().getColumnIndex()) {
indexCond[indexedColumnCount] = e;
indexedColumnCount++;
opType = e.opType;
opTypeEnd = OpTypes.MAX;
return true;
}
}
}
return false;
}
void addCondition(Expression e) {
if (e == null) {
return;
}
if (e instanceof ExpressionLogical) {
if (((ExpressionLogical) e).isTerminal) {
terminalCondition = e;
}
}
nonIndexCondition = ExpressionLogical.andExpressions(nonIndexCondition, e);
if (Expression.EXPR_FALSE.equals(nonIndexCondition)) {
isFalse = true;
}
if (rangeIndex == null || rangeIndex.getColumnCount() == 0) {
return;
}
if (indexedColumnCount == 0) {
return;
}
if (e.getIndexableExpression(rangeVar) == null) {
return;
}
int colIndex = e.getLeftNode().getColumnIndex();
int[] indexCols = rangeIndex.getColumns();
switch (e.getType()) {
case OpTypes.GREATER:
case OpTypes.GREATER_EQUAL:
case OpTypes.GREATER_EQUAL_PRE:
{
// replaces existing condition
if (opType == OpTypes.NOT) {
if (indexCols[indexedColumnCount - 1] == colIndex) {
nonIndexCondition =
ExpressionLogical.andExpressions(
nonIndexCondition, indexCond[indexedColumnCount - 1]);
indexCond[indexedColumnCount - 1] = e;
opType = e.opType;
opTypes[indexedColumnCount - 1] = e.opType;
if (e.getType() == OpTypes.GREATER_EQUAL_PRE && indexedColumnCount == 1) {
indexEndCond[indexedColumnCount - 1] =
ExpressionLogical.andExpressions(
indexEndCond[indexedColumnCount - 1], e.nodes[2]);
}
}
} else {
addToIndexConditions(e);
}
break;
}
case OpTypes.SMALLER:
case OpTypes.SMALLER_EQUAL:
{
if (opType == OpTypes.GREATER
|| opType == OpTypes.GREATER_EQUAL
|| opType == OpTypes.GREATER_EQUAL_PRE
|| opType == OpTypes.NOT) {
if (opTypeEnd != OpTypes.MAX) {
break;
}
if (indexCols[indexedColumnCount - 1] == colIndex) {
indexEndCond[indexedColumnCount - 1] = e;
indexEndCondition = ExpressionLogical.andExpressions(indexEndCondition, e);
opTypeEnd = e.opType;
opTypesEnd[indexedColumnCount - 1] = e.opType;
}
} else {
addToIndexEndConditions(e);
}
break;
}
default:
}
}
