public PredicateSegment(int startIndex, int stopIndex, ColumnSegment column, IPredicateRightValue rightValue)
{
_startIndex = startIndex;
_stopIndex = stopIndex;
_column = column;
_rightValue = rightValue;
}
private IASTNode CreateCompareSegment(MySqlCommandParser.BooleanPrimaryContext ctx)
{
IASTNode leftValue = Visit(ctx.booleanPrimary());
if (!(leftValue is ColumnSegment))
{
return(leftValue);
}
IPredicateRightValue rightValue = (IPredicateRightValue)CreatePredicateRightValue(ctx);
return(new PredicateSegment(ctx.Start.StartIndex, ctx.Stop.StopIndex, (ColumnSegment)leftValue, rightValue));
}
public static IRouteValue Generate(IPredicateRightValue predicateRightValue, Column column, ParameterContext parameterContext)
{
if (predicateRightValue is PredicateCompareRightValue predicateCompareRightValue)
{
return(_conditionValueCompareOperatorGenerator.Generate(predicateCompareRightValue, column, parameterContext));
}
if (predicateRightValue is PredicateInRightValue predicateInRightValue)
{
return(_conditionValueInOperatorGenerator.Generate(predicateInRightValue, column, parameterContext));
}
if (predicateRightValue is PredicateBetweenRightValue predicateBetweenRightValue)
{
return(_conditionValueBetweenOperatorGenerator.Generate(predicateBetweenRightValue, column, parameterContext));
}
return(null);
}
private object GetShardingValue(AndPredicateSegment andPredicate, ParameterContext parameterContext, String shardingColumn)
{
foreach (var predicate in andPredicate.GetPredicates())
{
if (!shardingColumn.EqualsIgnoreCase(predicate.GetColumn().GetIdentifier().GetValue()))
{
continue;
}
IPredicateRightValue rightValue = predicate.GetPredicateRightValue();
if (rightValue is PredicateCompareRightValue predicateCompareRightValue)
{
var segment = predicateCompareRightValue.GetExpression();
return(GetPredicateCompareShardingValue(segment, parameterContext));
}
if (rightValue is PredicateInRightValue predicateInRightValue)
{
ICollection <IExpressionSegment> segments = predicateInRightValue.SqlExpressions;
return(GetPredicateInShardingValue(segments, parameterContext));
}
}
return(null);
}
public IRouteValue Generate(IPredicateRightValue predicateRightValue, Column column, ParameterContext parameterContext)
{
return(Generate((PredicateInRightValue)predicateRightValue, column, parameterContext));
}
