use of herddb.sql.SQLRecordFunction in project herddb by diennea.
the class InsertOp method execute.
@Override
public StatementExecutionResult execute(TableSpaceManager tableSpaceManager, TransactionContext transactionContext, StatementEvaluationContext context, boolean lockRequired, boolean forWrite) {
StatementExecutionResult input = this.input.execute(tableSpaceManager, transactionContext, context, true, true);
ScanResult downstreamScanResult = (ScanResult) input;
final Table table = tableSpaceManager.getTableManager(tableName).getTable();
long transactionId = transactionContext.transactionId;
int updateCount = 0;
Bytes key = null;
Bytes newValue = null;
try (DataScanner inputScanner = downstreamScanResult.dataScanner) {
while (inputScanner.hasNext()) {
DataAccessor row = inputScanner.next();
long transactionIdFromScanner = inputScanner.getTransactionId();
if (transactionIdFromScanner > 0 && transactionIdFromScanner != transactionId) {
transactionId = transactionIdFromScanner;
transactionContext = new TransactionContext(transactionId);
}
int index = 0;
List<CompiledSQLExpression> keyValueExpression = new ArrayList<>();
List<String> keyExpressionToColumn = new ArrayList<>();
List<CompiledSQLExpression> valuesExpressions = new ArrayList<>();
List<String> valuesColumns = new ArrayList<>();
for (Column column : table.getColumns()) {
Object value = row.get(index++);
if (value != null) {
ConstantExpression exp = new ConstantExpression(value);
if (table.isPrimaryKeyColumn(column.name)) {
keyExpressionToColumn.add(column.name);
keyValueExpression.add(exp);
}
valuesColumns.add(column.name);
valuesExpressions.add(exp);
}
}
RecordFunction keyfunction;
if (keyValueExpression.isEmpty() && table.auto_increment) {
keyfunction = new AutoIncrementPrimaryKeyRecordFunction();
} else {
if (keyValueExpression.size() != table.primaryKey.length) {
throw new StatementExecutionException("you must set a value for the primary key (expressions=" + keyValueExpression.size() + ")");
}
keyfunction = new SQLRecordKeyFunction(keyExpressionToColumn, keyValueExpression, table);
}
RecordFunction valuesfunction = new SQLRecordFunction(valuesColumns, table, valuesExpressions);
DMLStatement insertStatement = new InsertStatement(tableSpace, tableName, keyfunction, valuesfunction).setReturnValues(returnValues);
DMLStatementExecutionResult _result = (DMLStatementExecutionResult) tableSpaceManager.executeStatement(insertStatement, context, transactionContext);
updateCount += _result.getUpdateCount();
if (_result.transactionId > 0 && _result.transactionId != transactionId) {
transactionId = _result.transactionId;
transactionContext = new TransactionContext(transactionId);
}
key = _result.getKey();
newValue = _result.getNewvalue();
}
if (updateCount > 1 && returnValues) {
if (transactionId > 0) {
// usually the first record will be rolledback with transaction failure
throw new StatementExecutionException("cannot 'return values' on multi-values insert");
} else {
throw new StatementExecutionException("cannot 'return values' on multi-values insert, at least record could have been written because autocommit=true");
}
}
return new DMLStatementExecutionResult(transactionId, updateCount, key, newValue);
} catch (DataScannerException err) {
throw new StatementExecutionException(err);
}
}
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