MojErr MojDbTextCollator::init(const MojChar* locale, MojDbCollationStrength level)
{
MojAssert(locale);
MojAssert(!m_ucol);
UCollationStrength strength = UCOL_PRIMARY;
switch (level) {
case MojDbCollationPrimary:
strength = UCOL_PRIMARY;
break;
case MojDbCollationSecondary:
strength = UCOL_SECONDARY;
break;
case MojDbCollationTertiary:
strength = UCOL_TERTIARY;
break;
case MojDbCollationIdentical:
strength = UCOL_IDENTICAL;
break;
default:
MojAssertNotReached();
}
UErrorCode status = U_ZERO_ERROR;
m_ucol = ucol_open(locale, &status);
MojUnicodeErrCheck(status);
MojAssert(m_ucol);
ucol_setAttribute(m_ucol, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
MojUnicodeErrCheck(status);
ucol_setStrength(m_ucol, strength);
return MojErrNone;
}
MojErr MojDbTextCollator::init(const MojChar* locale, MojDbCollationStrength level)
{
LOG_TRACE("Entering function %s", __FUNCTION__);
MojAssert(locale);
MojAssert(!m_ucol);
UCollationStrength strength = UCOL_PRIMARY;
switch (level) {
case MojDbCollationPrimary:
strength = UCOL_PRIMARY;
break;
case MojDbCollationSecondary:
strength = UCOL_SECONDARY;
break;
case MojDbCollationTertiary:
strength = UCOL_TERTIARY;
break;
case MojDbCollationQuaternary:
strength = UCOL_QUATERNARY;
break;
case MojDbCollationIdentical:
strength = UCOL_IDENTICAL;
break;
default:
MojAssertNotReached();
}
UErrorCode status = U_ZERO_ERROR;
m_ucol = ucol_open(locale, &status);
MojUnicodeErrCheck(status);
MojAssert(m_ucol);
ucol_setAttribute(m_ucol, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
if (level == MojDbCollationIdentical) {
// Combination of IDENTICAL and NUMERIC option cover full-width comparison and ["001","01","1"] ordering.
// NUMERIC option converts number charcter to numeric "a021" -> ["a",21]
ucol_setAttribute(m_ucol, UCOL_NUMERIC_COLLATION, UCOL_ON, &status);
}
MojUnicodeErrCheck(status);
ucol_setStrength(m_ucol, strength);
return MojErrNone;
}
MojErr MojDbQueryPlan::rangesFromKeys(MojDbKey lowerKey, MojDbKey upperKey, MojDbKey prefix, MojUInt32 index,
const MojDbQuery::WhereClause* clause)
{
MojErr err = MojErrNone;
MojUInt32 group = 0;
MojDbQuery::CompOp lowerOp = MojDbQuery::OpEq;
MojDbQuery::CompOp upperOp = MojDbQuery::OpNone;
if (clause) {
lowerOp = clause->lowerOp();
upperOp = clause->upperOp();
}
// set up upper bound
switch (upperOp) {
case MojDbQuery::OpNone:
MojAssert(lowerOp != MojDbQuery::OpNone);
upperKey = prefix;
// no break. fall through to OpLessThanEq case
case MojDbQuery::OpLessThanEq:
// match while less-than ++upperKey
err = upperKey.increment();
MojErrCheck(err);
break;
default:
MojAssert(upperOp == MojDbQuery::OpLessThan);
break;
}
// set up lower bound
switch (lowerOp) {
case MojDbQuery::OpNone:
// seek to prefix and match while less than upperKey
MojAssert(upperOp != MojDbQuery::OpNone);
err = addRange(lowerKey, upperKey);
MojErrCheck(err);
break;
case MojDbQuery::OpSearch:
group = index % m_groupCount;
// no break. fall through to OpPrefix case
case MojDbQuery::OpPrefix:
// remove null terminator
MojAssert(!prefix.empty());
if (prefix.byteVec().back() == 0) {
err = prefix.byteVec().pop();
MojErrCheck(err);
}
// no break. fall through to OpEq case
case MojDbQuery::OpEq:
// seek to lowerKey and match while less than ++prefix
err = prefix.increment();
MojErrCheck(err);
err = addRange(lowerKey, prefix, group);
MojErrCheck(err);
break;
case MojDbQuery::OpNotEq:
// seek to prefix and match while less than lowerKey
err = addRange(prefix, lowerKey);
MojErrCheck(err);
// seek to ++lowerKey, and match while less than ++prefix
err = lowerKey.increment();
MojErrCheck(err);
err = prefix.increment();
MojErrCheck(err);
err = addRange(lowerKey, prefix);
MojErrCheck(err);
break;
case MojDbQuery::OpGreaterThan:
// seek to ++lowerKey and match while less than upperKey
err = lowerKey.increment();
MojErrCheck(err);
// no break. fall through to OpGreaterThanEq case
case MojDbQuery::OpGreaterThanEq:
// seek to lowerKey and match while less than upperKey
err = addRange(lowerKey, upperKey);
MojErrCheck(err);
break;
default:
MojAssertNotReached();
break;
}
return MojErrNone;
}
