StatementInsert.java
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package org.hsqldb;
import org.hsqldb.ParserDQL.CompileContext;
import org.hsqldb.navigator.RowIterator;
import org.hsqldb.navigator.RowSetNavigator;
import org.hsqldb.navigator.RowSetNavigatorClient;
import org.hsqldb.navigator.RowSetNavigatorDataChange;
import org.hsqldb.navigator.RowSetNavigatorDataChangeMemory;
import org.hsqldb.persist.PersistentStore;
import org.hsqldb.result.Result;
import org.hsqldb.result.ResultConstants;
import org.hsqldb.trigger.Trigger;
import org.hsqldb.types.Type;
/**
* Implementation of Statement for INSERT statements.<p>
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.7.0
* @since 1.9.0
*/
public class StatementInsert extends StatementDML {
static final int isNone = 0;
static final int isIgnore = 1;
static final int isReplace = 2;
static final int isUpdate = 3;
int overrideUserValue = -1;
int specialAction = isNone;
/**
* Instantiate this as an INSERT_VALUES statement.
*/
StatementInsert(
Session session,
Table targetTable,
RangeVariable[] rangeVars,
int[] insertColumnMap,
Expression insertExpression,
boolean[] insertCheckColumns,
Expression[] updateExpressions,
boolean[] updateCheckColumns,
int[] updateColumnMap,
Expression[] targets,
int specialAction,
CompileContext compileContext) {
super(StatementTypes.INSERT, session.getCurrentSchemaHsqlName());
this.targetTable = targetTable;
this.targetRangeVariables = rangeVars;
this.baseTable = targetTable.isTriggerInsertable()
? targetTable
: targetTable.getBaseTable();
this.insertColumnMap = insertColumnMap;
this.insertCheckColumns = insertCheckColumns;
this.insertExpression = insertExpression;
this.updateCheckColumns = updateCheckColumns;
this.updateExpressions = updateExpressions;
this.updateColumnMap = updateColumnMap;
this.targets = targets;
this.specialAction = specialAction;
setupChecks();
setDatabaseObjects(session, compileContext);
checkAccessRights(session);
isSimpleInsert = insertExpression != null
&& insertExpression.nodes.length == 1
&& updatableTableCheck == null
&& specialAction == isNone;
}
/**
* Instantiate this as an INSERT_SELECT statement.
*/
StatementInsert(
Session session,
Table targetTable,
RangeVariable[] rangeVars,
int[] insertColumnMap,
boolean[] insertCheckColumns,
QueryExpression queryExpression,
Expression[] updateExpressions,
boolean[] updateCheckColumns,
int[] updateColumnMap,
Expression[] targets,
int specialAction,
int override,
CompileContext compileContext) {
super(StatementTypes.INSERT, session.getCurrentSchemaHsqlName());
this.targetTable = targetTable;
this.targetRangeVariables = rangeVars;
this.baseTable = targetTable.isTriggerInsertable()
? targetTable
: targetTable.getBaseTable();
this.insertColumnMap = insertColumnMap;
this.insertCheckColumns = insertCheckColumns;
this.queryExpression = queryExpression;
this.overrideUserValue = override;
this.updateCheckColumns = updateCheckColumns;
this.updateExpressions = updateExpressions;
this.updateColumnMap = updateColumnMap;
this.targets = targets;
this.specialAction = specialAction;
setupChecks();
setDatabaseObjects(session, compileContext);
checkAccessRights(session);
}
/**
* Executes an INSERT_SELECT or INSERT_VALUES statement. It is assumed that
* the argument is of the correct type.
*
* @return the result of executing the statement
*/
Result getResult(Session session) {
Result resultOut = null;
PersistentStore store = baseTable.getRowStore(session);
int count = 0;
session.getTransactionUTC();
if (isSimpleInsert) {
Type[] colTypes = baseTable.getColumnTypes();
Object[] data = getInsertData(
session,
colTypes,
insertExpression.nodes[0].nodes);
return insertSingleRow(session, store, data);
}
RowSetNavigator newDataNavigator = queryExpression == null
? getInsertValuesNavigator(session)
: getInsertSelectNavigator(session);
RowSetNavigatorDataChange changeNavigator = null;
if (specialAction != StatementInsert.isNone) {
while (newDataNavigator.next()) {
boolean remove = false;
Object[] data = newDataNavigator.getCurrent();
for (int i = 0, size = baseTable.constraintList.length;
i < size; i++) {
Constraint constraint = baseTable.constraintList[i];
if (constraint.isUniqueOrPK()) {
RowIterator it = constraint.findUniqueRows(
session,
data);
while (it.next()) {
remove = true;
if (specialAction == StatementInsert.isIgnore) {
break;
}
if (changeNavigator == null) {
changeNavigator =
new RowSetNavigatorDataChangeMemory(
session);
}
Row row = it.getCurrentRow();
if (constraint.core.mainIndex.compareRowNonUnique(
session,
row.getData(),
data,
constraint.core.mainCols) != 0) {
break;
}
changeNavigator.addRow(
session,
row,
data,
baseTable.getColumnTypes(),
baseTable.defaultColumnMap);
count++;
}
it.release();
}
}
if (remove) {
newDataNavigator.removeCurrent();
}
}
}
if (specialAction == StatementInsert.isReplace
&& changeNavigator != null) {
count = update(session, baseTable, changeNavigator, null);
changeNavigator.endMainDataSet();
} else if (specialAction == StatementInsert.isUpdate
&& changeNavigator != null) {
Type[] colTypes = baseTable.getColumnTypes();
session.sessionContext.setRangeIterator(changeNavigator);
session.sessionContext.setRangeIterator(
changeNavigator.getUpdateRowIterator());
while (changeNavigator.next()) {
session.sessionData.startRowProcessing();
Row row = changeNavigator.getCurrentRow();
Object[] newData = row.getDataCopy();
getUpdatedData(
session,
targets,
baseTable,
updateColumnMap,
updateExpressions,
colTypes,
newData);
changeNavigator.addUpdate(row, newData, updateColumnMap);
session.sessionContext.rownum++;
}
count = update(session, baseTable, changeNavigator, null);
changeNavigator.endMainDataSet();
}
if (newDataNavigator.getSize() != 0) {
RowSetNavigator generatedNavigator = null;
if (generatedIndexes != null) {
resultOut = Result.newUpdateCountResult(
generatedResultMetaData,
0);
generatedNavigator = resultOut.getChainedResult()
.getNavigator();
}
insertRowSet(session, generatedNavigator, newDataNavigator);
count += newDataNavigator.getSize();
}
if (baseTable.triggerLists[Trigger.INSERT_AFTER].length > 0) {
baseTable.fireTriggers(
session,
Trigger.INSERT_AFTER,
newDataNavigator);
}
if (resultOut == null) {
resultOut = new Result(ResultConstants.UPDATECOUNT, count);
} else {
resultOut.setUpdateCount(count);
}
if (count == 0) {
session.addWarning(HsqlException.noDataCondition);
}
session.sessionContext.diagnosticsVariables[ExpressionColumn.idx_row_count] =
Integer.valueOf(
count);
return resultOut;
}
RowSetNavigator getInsertSelectNavigator(Session session) {
Type[] colTypes = baseTable.getColumnTypes();
int[] columnMap = insertColumnMap;
//
Result result = queryExpression.getResult(session, 0);
RowSetNavigator nav = result.initialiseNavigator();
Type[] sourceTypes = result.metaData.columnTypes;
RowSetNavigatorClient newData = new RowSetNavigatorClient(
nav.getSize());
while (nav.next()) {
Object[] data = baseTable.getNewRowData(session);
Object[] sourceData = nav.getCurrent();
for (int i = 0; i < columnMap.length; i++) {
int j = columnMap[i];
if (j == this.overrideUserValue) {
continue;
}
Type sourceType = sourceTypes[i];
data[j] = colTypes[j].convertToType(
session,
sourceData[i],
sourceType);
}
newData.add(data);
}
return newData;
}
RowSetNavigator getInsertValuesNavigator(Session session) {
Type[] colTypes = baseTable.getColumnTypes();
//
Expression[] list = insertExpression.nodes;
RowSetNavigatorClient newData = new RowSetNavigatorClient(list.length);
for (int j = 0; j < list.length; j++) {
Expression[] rowArgs = list[j].nodes;
Object[] data = getInsertData(session, colTypes, rowArgs);
newData.add(data);
}
return newData;
}
}