public override SqlToken GenerateSqlToken(InsertCommandContext sqlCommandContext)
{
var result = FindPreviousSqlToken();
ShardingAssert.ShouldBeNotNull(result, "not find PreviousSqlToken");
var generatedKey = sqlCommandContext.GetGeneratedKeyContext();
ShardingAssert.ShouldBeNotNull(generatedKey, "generatedKey is required");
var generatedValues = generatedKey.GetGeneratedValues().Reverse().GetEnumerator();
int count = 0;
foreach (var insertValueContext in sqlCommandContext.GetInsertValueContexts())
{
var insertValueToken = result.InsertValues[count];
IDerivedSimpleExpressionSegment expressionSegment;
if (IsToAddDerivedLiteralExpression(sqlCommandContext, count))
{
expressionSegment = new DerivedLiteralExpressionSegment(generatedValues.Next());
}
else
{
expressionSegment = new DerivedParameterMarkerExpressionSegment(insertValueContext.GetParametersCount(), string.Empty);
}
insertValueToken.GetValues().Add(expressionSegment);
count++;
}
return(result);
}
/**
* Create sharding conditions.
*
* @param insertCommandContext insert statement context
* @param parameters SQL parameters
* @return sharding conditions
*/
public List <ShardingCondition> CreateShardingConditions(InsertCommandContext insertCommandContext,
ParameterContext parameterContext)
{
ICollection <ShardingCondition> result = new LinkedList <ShardingCondition>();
string tableName = insertCommandContext.GetSqlCommand().Table.GetTableName().GetIdentifier().GetValue();
ICollection <string> columnNames = GetColumnNames(insertCommandContext);
foreach (var insertValueContext in insertCommandContext.GetInsertValueContexts())
{
result.Add(CreateShardingCondition(tableName, columnNames.GetEnumerator(), insertValueContext,
parameterContext));
}
var generatedKey = insertCommandContext.GetGeneratedKeyContext();
if (generatedKey != null && generatedKey.IsGenerated())
{
generatedKey.GetGeneratedValues().AddAll(GetGeneratedKeys(tableName,
insertCommandContext.GetSqlCommand().GetValueListCount()));
if (_shardingRule.IsShardingColumn(generatedKey.GetColumnName(), tableName))
{
AppendGeneratedKeyCondition(generatedKey, tableName, result);
}
}
return(result.ToList());
}
public override SqlToken GenerateSqlToken(InsertCommandContext sqlCommandContext)
{
var insertColumnsSegment = sqlCommandContext.GetSqlCommand().InsertColumns;
ShardingAssert.ShouldBeNotNull(insertColumnsSegment, "insertColumnsSegment is required");
return(new UseDefaultInsertColumnsToken(insertColumnsSegment.GetStopIndex(), GetColumnNames(sqlCommandContext)));
}
public override SqlToken GenerateSqlToken(InsertCommandContext sqlCommandContext)
{
var generatedKey = sqlCommandContext.GetGeneratedKeyContext();
ShardingAssert.ShouldBeNotNull(generatedKey, "generatedKey is required");
var sqlSegment = sqlCommandContext.GetSqlCommand().InsertColumns;
ShardingAssert.ShouldBeNotNull(sqlSegment, "sqlSegment is required");
return(new GeneratedKeyInsertColumnToken(sqlSegment.GetStopIndex(), generatedKey.GetColumnName()));
}
private List <String> GetColumnNames(InsertCommandContext insertCommandContext)
{
var generatedKey = insertCommandContext.GetGeneratedKeyContext();
ShardingAssert.ShouldBeNotNull(generatedKey, "generatedKey is required");
List <String> result = new List <string>(insertCommandContext.GetColumnNames());
result.Remove(generatedKey.GetColumnName());
result.Add(generatedKey.GetColumnName());
return(result);
}
private ICollection <string> GetColumnNames(InsertCommandContext insertCommandContext)
{
var generatedKey = insertCommandContext.GetGeneratedKeyContext();
if (generatedKey != null && generatedKey.IsGenerated())
{
ICollection <string> result = new LinkedList <string>(insertCommandContext.GetColumnNames());
result.Remove(generatedKey.GetColumnName());
return(result);
}
return(insertCommandContext.GetColumnNames());
}
public override SqlToken GenerateSqlToken(InsertCommandContext sqlCommandContext)
{
var generatedKey = sqlCommandContext.GetGeneratedKeyContext();
ShardingAssert.ShouldBeNotNull(generatedKey, "generatedKey is required");
ShardingAssert.ShouldBeNotNull(sqlCommandContext.GetSqlCommand().SetAssignment, "setAssignment is required");
int startIndex = sqlCommandContext.GetSqlCommand().SetAssignment.GetStopIndex() + 1;
if (_parameterContext.IsEmpty())
{
return(new LiteralGeneratedKeyAssignmentToken(startIndex, generatedKey.GetColumnName(), generatedKey.GetGeneratedValues().LastOrDefault()));
}
return(new ParameterMarkerGeneratedKeyAssignmentToken(startIndex, generatedKey.GetColumnName()));
}
private bool IsToAddDerivedLiteralExpression(InsertCommandContext insertCommandContext, int insertValueCount)
{
return(insertCommandContext.GetGroupedParameters()[insertValueCount].IsEmpty());
}
