public override object VisitSearch_expression([NotNull] KoraliumParser.Search_expressionContext context)
{
SearchExpression searchExpression = new SearchExpression();
if (context.wildcard != null)
{
searchExpression.AllColumns = true;
}
else
{
var columnNodes = context.column_reference();
if (columnNodes == null)
{
throw new SqlParserException("Missing columns in CONTAINS");
}
foreach (var columnNode in columnNodes)
{
var columnReference = Visit(columnNode) as ColumnReference;
if (columnReference == null)
{
throw new SqlParserException("parameter in CONTAINS could not be resolved to a column");
}
searchExpression.Columns.Add(columnReference);
}
}
var scalarExpressionNode = context.scalar_expression();
if (scalarExpressionNode == null)
{
throw new SqlParserException("Could not find any search term in CONTAINS");
}
var scalarExpression = Visit(scalarExpressionNode) as ScalarExpression;
if (scalarExpression == null)
{
throw new SqlParserException("Could not parse search term in CONTAINS");
}
searchExpression.Value = scalarExpression;
return(searchExpression);
}
/// <summary>
/// Exit a parse tree produced by <see cref="KoraliumParser.search_expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitSearch_expression([NotNull] KoraliumParser.Search_expressionContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="KoraliumParser.search_expression"/>.
/// <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 VisitSearch_expression([NotNull] KoraliumParser.Search_expressionContext context)
{
return(VisitChildren(context));
}
