public override object VisitIs_null_predicate([NotNull] KoraliumParser.Is_null_predicateContext context)
{
var scalarExpressionNode = context.scalar_expression();
if (scalarExpressionNode == null)
{
throw new SqlParserException("Left side of IS NOT? NULL could not be parsed");
}
var scalarExpression = Visit(scalarExpressionNode) as ScalarExpression;
if (scalarExpression == null)
{
throw new SqlParserException("Left side of IS NOT? NULL is not a scalar expression");
}
bool isNot = context.NOT() != null;
return(new BooleanIsNullExpression()
{
IsNot = isNot,
ScalarExpression = scalarExpression
});
}
/// <summary>
/// Exit a parse tree produced by <see cref="KoraliumParser.is_null_predicate"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitIs_null_predicate([NotNull] KoraliumParser.Is_null_predicateContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="KoraliumParser.is_null_predicate"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitIs_null_predicate([NotNull] KoraliumParser.Is_null_predicateContext context)
{
return(VisitChildren(context));
}
