public Code Le(Code opd1, Code opd2)
{
Node left = (Node)opd1;
Node right = (Node)opd2;
if (left.type == NodeType.tpReal || right.type == NodeType.tpReal)
{
if (left.type == NodeType.tpInt)
{
left = QueryImpl.int2real(left);
}
else if (left.type != NodeType.tpReal)
{
throw new CodeGeneratorException("Invalid argument types");
}
if (right.type == NodeType.tpInt)
{
right = QueryImpl.int2real(right);
}
else if (right.type != NodeType.tpReal)
{
throw new CodeGeneratorException("Invalid argument types");
}
return(new BinOpNode(NodeType.tpBool, NodeTag.opRealLe, left, right));
}
else if (left.type == NodeType.tpInt && right.type == NodeType.tpInt)
{
return(new BinOpNode(NodeType.tpBool, NodeTag.opIntLe, left, right));
}
else if (left.type == NodeType.tpStr && right.type == NodeType.tpStr)
{
return(new BinOpNode(NodeType.tpBool, NodeTag.opStrLe, left, right));
}
else if (left.type == NodeType.tpDate || right.type == NodeType.tpDate)
{
if (left.type == NodeType.tpStr)
{
left = QueryImpl.str2date(left);
}
else if (left.type != NodeType.tpDate)
{
throw new CodeGeneratorException("Invalid argument types");
}
if (right.type == NodeType.tpStr)
{
right = QueryImpl.str2date(right);
}
else if (right.type != NodeType.tpDate)
{
throw new CodeGeneratorException("Invalid argument types");
}
return(new BinOpNode(NodeType.tpBool, NodeTag.opDateLe, left, right));
}
else
{
throw new CodeGeneratorException("Invalid argument types");
}
}
public Code Between(Code opd1, Code opd2, Code opd3)
{
Node expr = (Node)opd1;
Node low = (Node)opd2;
Node high = (Node)opd3;
if (expr.type == NodeType.tpReal || low.type == NodeType.tpReal || high.type == NodeType.tpReal)
{
if (expr.type == NodeType.tpInt)
{
expr = QueryImpl.int2real(expr);
}
else if (expr.type != NodeType.tpReal)
{
throw new CodeGeneratorException("Invalid argument types");
}
if (low.type == NodeType.tpInt)
{
low = QueryImpl.int2real(low);
}
else if (low.type != NodeType.tpReal)
{
throw new CodeGeneratorException("Invalid argument types");
}
if (high.type == NodeType.tpInt)
{
high = QueryImpl.int2real(high);
}
else if (high.type != NodeType.tpReal)
{
throw new CodeGeneratorException("Invalid argument types");
}
return(new CompareNode(NodeTag.opRealBetween, expr, low, high));
}
else if (expr.type == NodeType.tpInt && low.type == NodeType.tpInt && high.type == NodeType.tpInt)
{
return(new CompareNode(NodeTag.opIntBetween, expr, low, high));
}
else if (expr.type == NodeType.tpStr && low.type == NodeType.tpStr && high.type == NodeType.tpStr)
{
return(new CompareNode(NodeTag.opStrBetween, expr, low, high));
}
else if (expr.type == NodeType.tpDate)
{
if (low.type == NodeType.tpStr)
{
low = QueryImpl.str2date(low);
}
else if (low.type != NodeType.tpDate)
{
throw new CodeGeneratorException("Invalid argument types");
}
if (high.type == NodeType.tpStr)
{
high = QueryImpl.str2date(high);
}
else if (high.type != NodeType.tpDate)
{
throw new CodeGeneratorException("Invalid argument types");
}
return(new CompareNode(NodeTag.opDateBetween, expr, low, high));
}
else
{
throw new CodeGeneratorException("Invalid argument types");
}
}