public static SqlLiteralScalarExpression Create(SqlLiteral sqlLiteral)
{
SqlLiteralScalarExpression sqlLiteralScalarExpression;
if (sqlLiteral == SqlBooleanLiteral.True)
{
sqlLiteralScalarExpression = SqlLiteralScalarExpression.SqlTrueLiteralScalarExpression;
}
else if (sqlLiteral == SqlBooleanLiteral.False)
{
sqlLiteralScalarExpression = SqlLiteralScalarExpression.SqlFalseLiteralScalarExpression;
}
else if (sqlLiteral == SqlNullLiteral.Singleton)
{
sqlLiteralScalarExpression = SqlLiteralScalarExpression.SqlNullLiteralScalarExpression;
}
else if (sqlLiteral == SqlUndefinedLiteral.Singleton)
{
sqlLiteralScalarExpression = SqlLiteralScalarExpression.SqlUndefinedLiteralScalarExpression;
}
else
{
// Either a number or string in which we need to new one up.
sqlLiteralScalarExpression = new SqlLiteralScalarExpression(sqlLiteral);
}
return(sqlLiteralScalarExpression);
}
public override int Visit(SqlLiteralScalarExpression sqlLiteralScalarExpression)
{
int hashCode = SqlLiteralScalarExpressionHashCode;
hashCode = CombineHashes(hashCode, sqlLiteralScalarExpression.Literal.Accept(this));
return(hashCode);
}
public static SqlOffsetSpec Create(SqlNumberLiteral sqlNumberLiteral)
{
if (sqlNumberLiteral == null)
{
throw new ArgumentNullException(nameof(sqlNumberLiteral));
}
long value;
if (!sqlNumberLiteral.Value.IsInteger)
{
throw new ArgumentOutOfRangeException($"Expected {nameof(sqlNumberLiteral)} to be an integer.");
}
value = Number64.ToLong(sqlNumberLiteral.Value);
if (value < PremadeOffsetIndex && value >= 0)
{
return(SqlOffsetSpec.PremadeOffsetSpecs[value]);
}
SqlScalarExpression offsetExpression = SqlLiteralScalarExpression.Create(
SqlNumberLiteral.Create(
value));
return(new SqlOffsetSpec(offsetExpression));
}
public override SqlObject Visit(SqlLiteralScalarExpression sqlLiteralScalarExpression)
{
return(SqlLiteralScalarExpression.Create(sqlLiteralScalarExpression.Literal.Accept(this) as SqlLiteral));
}
public abstract void Visit(SqlLiteralScalarExpression scalarExpression);
public override void Visit(SqlLiteralScalarExpression sqlLiteralScalarExpression)
{
sqlLiteralScalarExpression.Literal.Accept(this);
}
protected abstract SqlScalarExpression Visit(SqlLiteralScalarExpression expression);
