protected override string GetComparisonLike(expression ex, bool caseInsensitive)
{
if (caseInsensitive)
{
/* workaround for oracle versions < 10g: version is not checked/optimized at the moment */
string lvalue = FN_StrUppercase(GetOperand(ex.qualifier_l, ex.operand_l));
string rvalue = FN_StrUppercase(GetOperand(ex.qualifier_r, ex.operand_r));
return(String.Format("{0}{1}{2}",
lvalue,
" LIKE ",
rvalue
));
}
else
{
/* perform optimized */
return(GetComparison(ex, " LIKE "));
}
}
protected override string GetComparisonLikeWildcardR(expression ex, bool caseInsensitive)
{
/* concatenates the LIKE wildcard to the second operand before comparison */
string lvalue = GetOperand(ex.qualifier_l, ex.operand_l);
string rvalue = ConcatWildcardR(GetOperand(ex.qualifier_r, ex.operand_r));
if (caseInsensitive)
{
/* workaround for oracle versions < 10g: ORA version is not checked/optimized at the moment */
lvalue = FN_StrUppercase(lvalue);
rvalue = FN_StrUppercase(rvalue);
}
/* cue with normal comparison syntax */
return(String.Format("{0}{1}{2}",
lvalue,
" LIKE ",
rvalue
));
}
public selectfield(selectfunctiondef func, expression expression, string rowsource_consumeralias, Ioperand literalconst, string fieldname, string asname, selectstatement subqry, sortorder order)
{
/* [rzamponi 20100112] FxCop CA1805:DoNotInitializeUnnecessarily */
//if (func == selectfunctiondef.none) Function = null; else Function = new selectfunction(func);
if (func != selectfunctiondef.none)
{
Function = new selectfunction(func);
}
Expression = expression;
RowsourceConsumerAlias = rowsource_consumeralias;
literal = literalconst;
Fieldname = fieldname;
AsName = asname;
subquery = subqry;
if (order == sortorder.so_asc)
{
Ascending = true;
}
else if (order == sortorder.so_desc)
{
Descending = true;
}
}
protected override string GetComparisonFulltext(expression ex)
{
return(String.Format("MATCH({0}) AGAINST({1} IN NATURAL LANGUAGE MODE)", GetOperand(ex.qualifier_l, ex.operand_l), GetOperand(ex.qualifier_r, ex.operand_r)));
}
protected override string GetHasNoText(expression ex)
{
/* in oracle, nvarchar2 is null when it is empty.
* therefore, this is reduced to a simple "not null" comparison */
return(String.Format("({0} IS NULL)", GetOperand(ex.qualifier_l, ex.operand_l)));
}
protected override string GetComparisonHasnotflagAny(expression ex)
{
return(String.Format("(BITAND({0},{1})=0)", GetOperand(ex.qualifier_l, ex.operand_l), GetOperand(ex.qualifier_r, ex.operand_r)));
}
protected override string GetAddDays(expression ex)
{
return(String.Format("DATEADD(DAY, {1}, {0})", GetOperand(ex.qualifier_l, ex.operand_l), GetOperand(ex.qualifier_r, ex.operand_r)));
}
public selectfield(expression expression, sortorder order) : this(selectfunctiondef.none, expression, null, null, null, null, null, order)
{
}
public selectfield(expression expression, string asname) : this(selectfunctiondef.none, expression, null, null, null, asname, null, sortorder.so_none)
{
}
