use of org.h2.result.ResultInterface in project h2database by h2database.
the class ScriptCommand method query.
@Override
public ResultInterface query(int maxrows) {
session.getUser().checkAdmin();
reset();
Database db = session.getDatabase();
if (schemaNames != null) {
for (String schemaName : schemaNames) {
Schema schema = db.findSchema(schemaName);
if (schema == null) {
throw DbException.get(ErrorCode.SCHEMA_NOT_FOUND_1, schemaName);
}
}
}
try {
result = createResult();
deleteStore();
openOutput();
if (out != null) {
buffer = new byte[Constants.IO_BUFFER_SIZE];
}
if (settings) {
for (Setting setting : db.getAllSettings()) {
if (setting.getName().equals(SetTypes.getTypeName(SetTypes.CREATE_BUILD))) {
// (it is only set when creating the database)
continue;
}
add(setting.getCreateSQL(), false);
}
}
if (out != null) {
add("", true);
}
for (User user : db.getAllUsers()) {
add(user.getCreateSQL(passwords), false);
}
for (Role role : db.getAllRoles()) {
add(role.getCreateSQL(true), false);
}
for (Schema schema : db.getAllSchemas()) {
if (excludeSchema(schema)) {
continue;
}
add(schema.getCreateSQL(), false);
}
for (UserDataType datatype : db.getAllUserDataTypes()) {
if (drop) {
add(datatype.getDropSQL(), false);
}
add(datatype.getCreateSQL(), false);
}
for (SchemaObject obj : db.getAllSchemaObjects(DbObject.CONSTANT)) {
if (excludeSchema(obj.getSchema())) {
continue;
}
Constant constant = (Constant) obj;
add(constant.getCreateSQL(), false);
}
final ArrayList<Table> tables = db.getAllTablesAndViews(false);
// sort by id, so that views are after tables and views on views
// after the base views
Collections.sort(tables, new Comparator<Table>() {
@Override
public int compare(Table t1, Table t2) {
return t1.getId() - t2.getId();
}
});
// Generate the DROP XXX ... IF EXISTS
for (Table table : tables) {
if (excludeSchema(table.getSchema())) {
continue;
}
if (excludeTable(table)) {
continue;
}
if (table.isHidden()) {
continue;
}
table.lock(session, false, false);
String sql = table.getCreateSQL();
if (sql == null) {
// null for metadata tables
continue;
}
if (drop) {
add(table.getDropSQL(), false);
}
}
for (SchemaObject obj : db.getAllSchemaObjects(DbObject.FUNCTION_ALIAS)) {
if (excludeSchema(obj.getSchema())) {
continue;
}
if (drop) {
add(obj.getDropSQL(), false);
}
add(obj.getCreateSQL(), false);
}
for (UserAggregate agg : db.getAllAggregates()) {
if (drop) {
add(agg.getDropSQL(), false);
}
add(agg.getCreateSQL(), false);
}
for (SchemaObject obj : db.getAllSchemaObjects(DbObject.SEQUENCE)) {
if (excludeSchema(obj.getSchema())) {
continue;
}
Sequence sequence = (Sequence) obj;
if (drop) {
add(sequence.getDropSQL(), false);
}
add(sequence.getCreateSQL(), false);
}
// Generate CREATE TABLE and INSERT...VALUES
int count = 0;
for (Table table : tables) {
if (excludeSchema(table.getSchema())) {
continue;
}
if (excludeTable(table)) {
continue;
}
if (table.isHidden()) {
continue;
}
table.lock(session, false, false);
String createTableSql = table.getCreateSQL();
if (createTableSql == null) {
// null for metadata tables
continue;
}
final TableType tableType = table.getTableType();
add(createTableSql, false);
final ArrayList<Constraint> constraints = table.getConstraints();
if (constraints != null) {
for (Constraint constraint : constraints) {
if (Constraint.Type.PRIMARY_KEY == constraint.getConstraintType()) {
add(constraint.getCreateSQLWithoutIndexes(), false);
}
}
}
if (TableType.TABLE == tableType) {
if (table.canGetRowCount()) {
String rowcount = "-- " + table.getRowCountApproximation() + " +/- SELECT COUNT(*) FROM " + table.getSQL();
add(rowcount, false);
}
if (data) {
count = generateInsertValues(count, table);
}
}
final ArrayList<Index> indexes = table.getIndexes();
for (int j = 0; indexes != null && j < indexes.size(); j++) {
Index index = indexes.get(j);
if (!index.getIndexType().getBelongsToConstraint()) {
add(index.getCreateSQL(), false);
}
}
}
if (tempLobTableCreated) {
add("DROP TABLE IF EXISTS SYSTEM_LOB_STREAM", true);
add("CALL SYSTEM_COMBINE_BLOB(-1)", true);
add("DROP ALIAS IF EXISTS SYSTEM_COMBINE_CLOB", true);
add("DROP ALIAS IF EXISTS SYSTEM_COMBINE_BLOB", true);
tempLobTableCreated = false;
}
// Generate CREATE CONSTRAINT ...
final ArrayList<SchemaObject> constraints = db.getAllSchemaObjects(DbObject.CONSTRAINT);
Collections.sort(constraints, new Comparator<SchemaObject>() {
@Override
public int compare(SchemaObject c1, SchemaObject c2) {
return ((Constraint) c1).compareTo((Constraint) c2);
}
});
for (SchemaObject obj : constraints) {
if (excludeSchema(obj.getSchema())) {
continue;
}
Constraint constraint = (Constraint) obj;
if (excludeTable(constraint.getTable())) {
continue;
}
if (constraint.getTable().isHidden()) {
continue;
}
if (Constraint.Type.PRIMARY_KEY != constraint.getConstraintType()) {
add(constraint.getCreateSQLWithoutIndexes(), false);
}
}
// Generate CREATE TRIGGER ...
for (SchemaObject obj : db.getAllSchemaObjects(DbObject.TRIGGER)) {
if (excludeSchema(obj.getSchema())) {
continue;
}
TriggerObject trigger = (TriggerObject) obj;
if (excludeTable(trigger.getTable())) {
continue;
}
add(trigger.getCreateSQL(), false);
}
// Generate GRANT ...
for (Right right : db.getAllRights()) {
DbObject object = right.getGrantedObject();
if (object != null) {
if (object instanceof Schema) {
if (excludeSchema((Schema) object)) {
continue;
}
} else if (object instanceof Table) {
Table table = (Table) object;
if (excludeSchema(table.getSchema())) {
continue;
}
if (excludeTable(table)) {
continue;
}
}
}
add(right.getCreateSQL(), false);
}
// Generate COMMENT ON ...
for (Comment comment : db.getAllComments()) {
add(comment.getCreateSQL(), false);
}
if (out != null) {
out.close();
}
} catch (IOException e) {
throw DbException.convertIOException(e, getFileName());
} finally {
closeIO();
}
result.done();
LocalResult r = result;
reset();
return r;
}
use of org.h2.result.ResultInterface in project h2database by h2database.
the class Select method queryWithoutCache.
@Override
protected ResultInterface queryWithoutCache(int maxRows, ResultTarget target) {
int limitRows = maxRows == 0 ? -1 : maxRows;
if (limitExpr != null) {
Value v = limitExpr.getValue(session);
int l = v == ValueNull.INSTANCE ? -1 : v.getInt();
if (limitRows < 0) {
limitRows = l;
} else if (l >= 0) {
limitRows = Math.min(l, limitRows);
}
}
boolean lazy = session.isLazyQueryExecution() && target == null && !isForUpdate && !isQuickAggregateQuery && limitRows != 0 && offsetExpr == null && isReadOnly();
int columnCount = expressions.size();
LocalResult result = null;
if (!lazy && (target == null || !session.getDatabase().getSettings().optimizeInsertFromSelect)) {
result = createLocalResult(result);
}
if (sort != null && (!sortUsingIndex || distinct)) {
result = createLocalResult(result);
result.setSortOrder(sort);
}
if (distinct && !isDistinctQuery) {
result = createLocalResult(result);
result.setDistinct();
}
if (randomAccessResult) {
result = createLocalResult(result);
}
if (isGroupQuery && !isGroupSortedQuery) {
result = createLocalResult(result);
}
if (!lazy && (limitRows >= 0 || offsetExpr != null)) {
result = createLocalResult(result);
}
topTableFilter.startQuery(session);
topTableFilter.reset();
boolean exclusive = isForUpdate && !isForUpdateMvcc;
if (isForUpdateMvcc) {
if (isGroupQuery) {
throw DbException.getUnsupportedException("MVCC=TRUE && FOR UPDATE && GROUP");
} else if (distinct) {
throw DbException.getUnsupportedException("MVCC=TRUE && FOR UPDATE && DISTINCT");
} else if (isQuickAggregateQuery) {
throw DbException.getUnsupportedException("MVCC=TRUE && FOR UPDATE && AGGREGATE");
} else if (topTableFilter.getJoin() != null) {
throw DbException.getUnsupportedException("MVCC=TRUE && FOR UPDATE && JOIN");
}
}
topTableFilter.lock(session, exclusive, exclusive);
ResultTarget to = result != null ? result : target;
lazy &= to == null;
LazyResult lazyResult = null;
if (limitRows != 0) {
try {
if (isQuickAggregateQuery) {
queryQuick(columnCount, to);
} else if (isGroupQuery) {
if (isGroupSortedQuery) {
lazyResult = queryGroupSorted(columnCount, to);
} else {
queryGroup(columnCount, result);
}
} else if (isDistinctQuery) {
queryDistinct(to, limitRows);
} else {
lazyResult = queryFlat(columnCount, to, limitRows);
}
} finally {
if (!lazy) {
resetJoinBatchAfterQuery();
}
}
}
assert lazy == (lazyResult != null) : lazy;
if (lazyResult != null) {
if (limitRows > 0) {
lazyResult.setLimit(limitRows);
}
return lazyResult;
}
if (offsetExpr != null) {
result.setOffset(offsetExpr.getValue(session).getInt());
}
if (limitRows >= 0) {
result.setLimit(limitRows);
}
if (result != null) {
result.done();
if (target != null) {
while (result.next()) {
target.addRow(result.currentRow());
}
result.close();
return null;
}
return result;
}
return null;
}
use of org.h2.result.ResultInterface in project h2database by h2database.
the class Explain method query.
@Override
public ResultInterface query(int maxrows) {
Column column = new Column("PLAN", Value.STRING);
Database db = session.getDatabase();
ExpressionColumn expr = new ExpressionColumn(db, column);
Expression[] expressions = { expr };
result = new LocalResult(session, expressions, 1);
if (maxrows >= 0) {
String plan;
if (executeCommand) {
PageStore store = null;
Store mvStore = null;
if (db.isPersistent()) {
store = db.getPageStore();
if (store != null) {
store.statisticsStart();
}
mvStore = db.getMvStore();
if (mvStore != null) {
mvStore.statisticsStart();
}
}
if (command.isQuery()) {
command.query(maxrows);
} else {
command.update();
}
plan = command.getPlanSQL();
Map<String, Integer> statistics = null;
if (store != null) {
statistics = store.statisticsEnd();
} else if (mvStore != null) {
statistics = mvStore.statisticsEnd();
}
if (statistics != null) {
int total = 0;
for (Entry<String, Integer> e : statistics.entrySet()) {
total += e.getValue();
}
if (total > 0) {
statistics = new TreeMap<>(statistics);
StringBuilder buff = new StringBuilder();
if (statistics.size() > 1) {
buff.append("total: ").append(total).append('\n');
}
for (Entry<String, Integer> e : statistics.entrySet()) {
int value = e.getValue();
int percent = (int) (100L * value / total);
buff.append(e.getKey()).append(": ").append(value);
if (statistics.size() > 1) {
buff.append(" (").append(percent).append("%)");
}
buff.append('\n');
}
plan += "\n/*\n" + buff.toString() + "*/";
}
}
} else {
plan = command.getPlanSQL();
}
add(plan);
}
result.done();
return result;
}
use of org.h2.result.ResultInterface in project h2database by h2database.
the class Call method queryMeta.
@Override
public ResultInterface queryMeta() {
LocalResult result;
if (isResultSet) {
Expression[] expr = expression.getExpressionColumns(session);
result = new LocalResult(session, expr, expr.length);
} else {
result = new LocalResult(session, expressions, 1);
}
result.done();
return result;
}
use of org.h2.result.ResultInterface in project h2database by h2database.
the class ConstraintReferential method checkExistingData.
@Override
public void checkExistingData(Session session) {
if (session.getDatabase().isStarting()) {
// don't check at startup
return;
}
session.startStatementWithinTransaction();
StatementBuilder buff = new StatementBuilder("SELECT 1 FROM (SELECT ");
for (IndexColumn c : columns) {
buff.appendExceptFirst(", ");
buff.append(c.getSQL());
}
buff.append(" FROM ").append(table.getSQL()).append(" WHERE ");
buff.resetCount();
for (IndexColumn c : columns) {
buff.appendExceptFirst(" AND ");
buff.append(c.getSQL()).append(" IS NOT NULL ");
}
buff.append(" ORDER BY ");
buff.resetCount();
for (IndexColumn c : columns) {
buff.appendExceptFirst(", ");
buff.append(c.getSQL());
}
buff.append(") C WHERE NOT EXISTS(SELECT 1 FROM ").append(refTable.getSQL()).append(" P WHERE ");
buff.resetCount();
int i = 0;
for (IndexColumn c : columns) {
buff.appendExceptFirst(" AND ");
buff.append("C.").append(c.getSQL()).append('=').append("P.").append(refColumns[i++].getSQL());
}
buff.append(')');
String sql = buff.toString();
ResultInterface r = session.prepare(sql).query(1);
if (r.next()) {
throw DbException.get(ErrorCode.REFERENTIAL_INTEGRITY_VIOLATED_PARENT_MISSING_1, getShortDescription(null, null));
}
}
Aggregations