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Sql: SqlExp support for 'union all' (as operator+)

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git-svn-id: svn://ultimatepp.org/upp/trunk@7701 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2014-09-19 06:29:21 +00:00
parent deac71fc8e
commit eb87f9b6ef
4 changed files with 49 additions and 30 deletions
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7
uppsrc/Sql/SqlSet.cpp
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@ -8,6 +8,13 @@ SqlSet operator|(const SqlSet& s1, const SqlSet& s2) {
return SqlSet(s1(SqlSet::SET, ~SQLITE3) + " union " + s2(SqlSet::SET, ~SQLITE3), SqlSet::SETOP);
}
SqlSet operator+(const SqlSet& s1, const SqlSet& s2)
{
if(s1.IsEmpty()) return s2;
if(s2.IsEmpty()) return s1;
return SqlSet(s1(SqlSet::SET, ~SQLITE3) + " union all " + s2(SqlSet::SET, ~SQLITE3), SqlSet::SETOP);
}
SqlSet operator&(const SqlSet& s1, const SqlSet& s2) {
if(s1.IsEmpty()) return s2;
if(s2.IsEmpty()) return s1;