本文整理汇总了C++中TableIndex::nextValueAtKey方法的典型用法代码示例。如果您正苦于以下问题：C++ TableIndex::nextValueAtKey方法的具体用法？C++ TableIndex::nextValueAtKey怎么用？C++ TableIndex::nextValueAtKey使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类TableIndex的用法示例。
在下文中一共展示了TableIndex::nextValueAtKey方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: p_execute
//.........这里部分代码省略.........
if (initial_expression != NULL && !initial_expression->eval(&tuple, NULL).isTrue()) {
// just passed the first failed entry, so move 2 backward
tableIndex->moveToBeforePriorEntry(indexCursor);
break;
}
}
if (tuple.isNullTuple()) {
tableIndex->moveToEnd(false, indexCursor);
}
}
}
else {
return false;
}
}
else {
bool toStartActually = (localSortDirection != SORT_DIRECTION_TYPE_DESC);
tableIndex->moveToEnd(toStartActually, indexCursor);
}
int tuple_ctr = 0;
int tuples_skipped = 0; // for offset
int limit = -1;
int offset = -1;
if (limit_node != NULL) {
limit_node->getLimitAndOffsetByReference(params, limit, offset);
}
//
// We have to different nextValue() methods for different lookup types
//
while ((limit == -1 || tuple_ctr < limit) &&
((localLookupType == INDEX_LOOKUP_TYPE_EQ &&
!(tuple = tableIndex->nextValueAtKey(indexCursor)).isNullTuple()) ||
((localLookupType != INDEX_LOOKUP_TYPE_EQ || activeNumOfSearchKeys == 0) &&
!(tuple = tableIndex->nextValue(indexCursor)).isNullTuple()))) {
if (tuple.isPendingDelete()) {
continue;
}
VOLT_TRACE("LOOPING in indexscan: tuple: '%s'\n", tuple.debug("tablename").c_str());
pmp.countdownProgress();
//
// First check to eliminate the null index rows for UNDERFLOW case only
//
if (skipNullExpr != NULL) {
if (skipNullExpr->eval(&tuple, NULL).isTrue()) {
VOLT_DEBUG("Index scan: find out null rows or columns.");
continue;
} else {
skipNullExpr = NULL;
}
}
//
// First check whether the end_expression is now false
//
if (end_expression != NULL && !end_expression->eval(&tuple, NULL).isTrue()) {
VOLT_TRACE("End Expression evaluated to false, stopping scan");
break;
}
//
// Then apply our post-predicate to do further filtering
//
if (post_expression == NULL || post_expression->eval(&tuple, NULL).isTrue()) {
//
// INLINE OFFSET示例2: p_execute
//.........这里部分代码省略.........
pmp.countdownProgress();
if (initial_expression != NULL && !initial_expression->eval(&tuple, NULL).isTrue()) {
// just passed the first failed entry, so move 2 backward
tableIndex->moveToBeforePriorEntry();
break;
}
}
if (tuple.isNullTuple()) {
tableIndex->moveToEnd(false);
}
}
}
else {
return false;
}
} else {
bool toStartActually = (localSortDirection != SORT_DIRECTION_TYPE_DESC);
tableIndex->moveToEnd(toStartActually);
}
int tuple_ctr = 0;
int tuples_skipped = 0; // for offset
int limit = -1;
int offset = -1;
if (limit_node != NULL) {
limit_node->getLimitAndOffsetByReference(params, limit, offset);
}
//
// We have to different nextValue() methods for different lookup types
//
while ((limit == -1 || tuple_ctr < limit) &&
((localLookupType == INDEX_LOOKUP_TYPE_EQ &&
!(tuple = tableIndex->nextValueAtKey()).isNullTuple()) ||
((localLookupType != INDEX_LOOKUP_TYPE_EQ || activeNumOfSearchKeys == 0) &&
!(tuple = tableIndex->nextValue()).isNullTuple()))) {
VOLT_TRACE("LOOPING in indexscan: tuple: '%s'\n", tuple.debug("tablename").c_str());
pmp.countdownProgress();
//
// First check to eliminate the null index rows for UNDERFLOW case only
//
if (skipNullExpr != NULL) {
if (skipNullExpr->eval(&tuple, NULL).isTrue()) {
VOLT_DEBUG("Index scan: find out null rows or columns.");
continue;
} else {
skipNullExpr = NULL;
}
}
//
// First check whether the end_expression is now false
//
if (end_expression != NULL && !end_expression->eval(&tuple, NULL).isTrue()) {
VOLT_TRACE("End Expression evaluated to false, stopping scan");
break;
}
//
// Then apply our post-predicate to do further filtering
//
if (post_expression == NULL || post_expression->eval(&tuple, NULL).isTrue()) {
//
// INLINE OFFSET
//
if (tuples_skipped < offset)
{
tuples_skipped++;