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)); }