public void testSplitJoinQuery() throws Exception {
Connection con = getTestDbConnection();
DataContext dc = new JdbcDataContext(con);
Schema schema = dc.getDefaultSchema();
Table productsTable = schema.getTableByName("PRODUCTS");
Relationship[] relationships = productsTable.getRelationships();
Relationship relationship = relationships[0];
assertEquals(
"Relationship[primaryTable=PRODUCTS,primaryColumns=[PRODUCTCODE],foreignTable=ORDERFACT,foreignColumns=[PRODUCTCODE]]",
relationship.toString());
Query q =
new Query()
.from(new FromItem(JoinType.LEFT, relationship))
.select(relationship.getForeignColumns())
.select(relationship.getPrimaryColumns());
assertEquals(
"SELECT _ORDERFACT_._PRODUCTCODE_, _PRODUCTS_._PRODUCTCODE_ FROM PUBLIC._PRODUCTS_ LEFT JOIN PUBLIC._ORDERFACT_ ON _PRODUCTS_._PRODUCTCODE_ = _ORDERFACT_._PRODUCTCODE_",
q.toString().replace('\"', '_'));
QuerySplitter qs = new QuerySplitter(dc, q);
assertEquals(2997, qs.getRowCount());
List<Query> splitQueries = qs.setMaxRows(1500).splitQuery();
assertSameCount(dc, qs, splitQueries);
assertEquals(3, splitQueries.size());
assertEquals("[1415, 902, 680]", Arrays.toString(getCounts(dc, splitQueries)));
}
@Test
public void testGroupByQuery() throws Exception {
Table table = dataContext.getDefaultSchema().getTableByName(peopleIndexType);
Query q = new Query();
q.from(table);
q.groupBy(table.getColumnByName("gender"));
q.select(
new SelectItem(table.getColumnByName("gender")),
new SelectItem(FunctionType.MAX, table.getColumnByName("age")),
new SelectItem(FunctionType.MIN, table.getColumnByName("age")),
new SelectItem(FunctionType.COUNT, "*", "total"),
new SelectItem(FunctionType.MIN, table.getColumnByName("id")).setAlias("firstId"));
q.orderBy("gender");
DataSet data = dataContext.executeQuery(q);
assertEquals(
"[peopletype.gender, MAX(peopletype.age), MIN(peopletype.age), COUNT(*) AS total, MIN(peopletype.id) AS firstId]",
Arrays.toString(data.getSelectItems()));
assertTrue(data.next());
assertEquals("Row[values=[female, 20, 17, 5, 5]]", data.getRow().toString());
assertTrue(data.next());
assertEquals("Row[values=[male, 19, 17, 4, 1]]", data.getRow().toString());
assertFalse(data.next());
}
public void testGroupByQuery() throws Exception {
Connection con = getTestDbConnection();
DataContext dc = new JdbcDataContext(con);
Schema schema = dc.getDefaultSchema();
Table employeesTable = schema.getTableByName("EMPLOYEES");
Table orderDetailsTable = schema.getTableByName("ORDERDETAILS");
Query q = new Query().from(employeesTable, "e").from(orderDetailsTable, "c");
q.select(orderDetailsTable.getColumns()[0])
.select(new SelectItem(FunctionType.MAX, employeesTable.getColumns()[0]));
q.groupBy(orderDetailsTable.getColumns()[0]);
assertEquals(
"SELECT c._ORDERNUMBER_, MAX(e._EMPLOYEENUMBER_) FROM PUBLIC._EMPLOYEES_ e, PUBLIC._ORDERDETAILS_ c GROUP BY c._ORDERNUMBER_",
q.toString().replace('\"', '_'));
QuerySplitter qs = new QuerySplitter(dc, q);
assertEquals(326, qs.getRowCount());
List<Query> splitQueries = qs.setMaxRows(250).splitQuery();
assertEquals(
"[SELECT c._ORDERNUMBER_, MAX(e._EMPLOYEENUMBER_) FROM PUBLIC._EMPLOYEES_ e, PUBLIC._ORDERDETAILS_ c WHERE (c._ORDERNUMBER_ < 10262 OR c._ORDERNUMBER_ IS NULL) GROUP BY c._ORDERNUMBER_, SELECT c._ORDERNUMBER_, MAX(e._EMPLOYEENUMBER_) FROM PUBLIC._EMPLOYEES_ e, PUBLIC._ORDERDETAILS_ c WHERE (c._ORDERNUMBER_ > 10262 OR c._ORDERNUMBER_ = 10262) GROUP BY c._ORDERNUMBER_]",
Arrays.toString(splitQueries.toArray()).replace('\"', '_'));
assertSameCount(dc, qs, splitQueries);
assertEquals(2, splitQueries.size());
assertEquals("[162, 164]", Arrays.toString(getCounts(dc, splitQueries)));
DataSet data = qs.executeQueries();
int count = 0;
while (data.next()) {
if (count == 2) {
assertEquals("Row[values=[10102, 1702]]", data.getRow().toString());
}
count++;
}
data.close();
assertEquals(326, count);
}
public void testSimpleQuerySplit() throws Exception {
Connection con = getTestDbConnection();
DataContext dc = new JdbcDataContext(con);
Schema schema = dc.getSchemaByName("PUBLIC");
Table employeesTable = schema.getTableByName("EMPLOYEES");
Table customersTable = schema.getTableByName("CUSTOMERS");
Query q = new Query().from(employeesTable, "e").from(customersTable, "c");
q.select(employeesTable.getColumns()[0], customersTable.getColumns()[0]);
assertEquals(
"SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c",
q.toString().replace('\"', '_'));
QuerySplitter qs = new QuerySplitter(dc, q);
long rowCount = qs.getRowCount();
assertEquals(2806, rowCount);
qs.setMaxRows(1000);
List<Query> splitQueries = qs.splitQuery();
assertEquals("[793, 610, 366, 714, 323]", Arrays.toString(getCounts(dc, splitQueries)));
assertEquals(
"[SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c WHERE (c._CUSTOMERNUMBER_ < 299 OR c._CUSTOMERNUMBER_ IS NULL) AND (e._EMPLOYEENUMBER_ < 1352 OR e._EMPLOYEENUMBER_ IS NULL), SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c WHERE (c._CUSTOMERNUMBER_ < 299 OR c._CUSTOMERNUMBER_ IS NULL) AND (e._EMPLOYEENUMBER_ > 1352 OR e._EMPLOYEENUMBER_ = 1352), SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c WHERE (c._CUSTOMERNUMBER_ > 299 OR c._CUSTOMERNUMBER_ = 299) AND (e._REPORTSTO_ < 1072 OR e._REPORTSTO_ IS NULL), SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c WHERE (c._CUSTOMERNUMBER_ > 299 OR c._CUSTOMERNUMBER_ = 299) AND (e._REPORTSTO_ > 1072 OR e._REPORTSTO_ = 1072) AND (c._SALESREPEMPLOYEENUMBER_ < 1433 OR c._SALESREPEMPLOYEENUMBER_ IS NULL), SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c WHERE (c._CUSTOMERNUMBER_ > 299 OR c._CUSTOMERNUMBER_ = 299) AND (e._REPORTSTO_ > 1072 OR e._REPORTSTO_ = 1072) AND (c._SALESREPEMPLOYEENUMBER_ > 1433 OR c._SALESREPEMPLOYEENUMBER_ = 1433)]",
Arrays.toString(splitQueries.toArray()).replace('\"', '_'));
assertSameCount(dc, qs, splitQueries);
assertEquals(5, splitQueries.size());
splitQueries = qs.setMaxRows(300).splitQuery();
assertSameCount(dc, qs, splitQueries);
assertEquals(
"[299, 221, 170, 299, 276, 253, 102, 289, 253, 138, 368, 138]",
Arrays.toString(getCounts(dc, splitQueries)));
splitQueries = qs.setMaxRows(5000).splitQuery();
assertEquals(1, splitQueries.size());
assertSame(q, splitQueries.get(0));
}
public void testSplitSubQuery() throws Exception {
Connection con = getTestDbConnection();
DataContext dc = new JdbcDataContext(con);
Schema schema = dc.getDefaultSchema();
Table employeesTable = schema.getTableByName("EMPLOYEES");
Table customersTable = schema.getTableByName("CUSTOMERS");
Query sq = new Query().from(employeesTable, "e").from(customersTable, "c");
SelectItem empSelectItem = new SelectItem(employeesTable.getColumns()[0]);
SelectItem custSelectItem = new SelectItem(customersTable.getColumns()[0]);
sq.select(empSelectItem, custSelectItem);
assertEquals(
"SELECT e._EMPLOYEENUMBER_, c._CUSTOMERNUMBER_ FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c",
sq.toString().replace('\"', '_'));
Query q = new Query();
FromItem sqItem = new FromItem(sq).setAlias("sq");
custSelectItem.setAlias("c_num");
empSelectItem.setAlias("e_num");
q.from(sqItem);
q.select(new SelectItem(custSelectItem, sqItem), new SelectItem(empSelectItem, sqItem));
assertEquals(
"SELECT sq.c_num, sq.e_num FROM (SELECT e._EMPLOYEENUMBER_ AS e_num, c._CUSTOMERNUMBER_ AS c_num FROM PUBLIC._EMPLOYEES_ e, PUBLIC._CUSTOMERS_ c) sq",
q.toString().replace('\"', '_'));
QuerySplitter qs = new QuerySplitter(dc, q);
assertEquals(2806, qs.getRowCount());
List<Query> splitQueries = qs.setMaxRows(1000).splitQuery();
assertSameCount(dc, qs, splitQueries);
assertEquals(5, splitQueries.size());
assertEquals("[793, 610, 366, 714, 323]", Arrays.toString(getCounts(dc, splitQueries)));
splitQueries = qs.setMaxRows(2000).splitQuery();
assertSameCount(dc, qs, splitQueries);
assertEquals(2, splitQueries.size());
assertEquals("[1403, 1403]", Arrays.toString(getCounts(dc, splitQueries)));
DataSet data = qs.executeQueries();
int count = 0;
while (data.next()) {
if (count == 2) {
assertEquals("Row[values=[114, 1002]]", data.getRow().toString());
}
count++;
}
data.close();
assertEquals(2806, count);
}
public String rewriteQuery(Query query) {
query = beforeRewrite(query);
final StringBuilder sb = new StringBuilder();
sb.append(rewriteSelectClause(query, query.getSelectClause()));
sb.append(rewriteFromClause(query, query.getFromClause()));
sb.append(rewriteWhereClause(query, query.getWhereClause()));
sb.append(rewriteGroupByClause(query, query.getGroupByClause()));
sb.append(rewriteHavingClause(query, query.getHavingClause()));
sb.append(rewriteOrderByClause(query, query.getOrderByClause()));
return sb.toString();
}
@Override
public DataSet executeQuery(Query query) {
final List<FromItem> fromItems = query.getFromClause().getItems();
if (fromItems.size() != 1) {
// not a simple SELECT ... FROM [table] ... query, we need to use
// query post processing.
return super.executeQuery(query);
}
final Table table = fromItems.get(0).getTable();
if (table == null) {
return super.executeQuery(query);
}
if (!query.getGroupByClause().isEmpty()) {
return super.executeQuery(query);
}
if (!query.getHavingClause().isEmpty()) {
return super.executeQuery(query);
}
final List<SelectItem> selectItems = query.getSelectClause().getItems();
final StringBuilder sb = new StringBuilder();
try {
sb.append("SELECT ");
int i = 0;
final Column[] columns = new Column[selectItems.size()];
for (SelectItem selectItem : selectItems) {
validateSoqlSupportedSelectItem(selectItem);
columns[i] = selectItem.getColumn();
if (i != 0) {
sb.append(", ");
}
sb.append(columns[i].getName());
i++;
}
sb.append(" FROM ");
sb.append(table.getName());
boolean firstWhere = true;
for (FilterItem filterItem : query.getWhereClause().getItems()) {
if (firstWhere) {
sb.append(" WHERE ");
firstWhere = false;
} else {
sb.append(" AND ");
}
rewriteFilterItem(sb, filterItem);
}
i = 0;
final List<OrderByItem> items = query.getOrderByClause().getItems();
for (OrderByItem orderByItem : items) {
if (i == 0) {
sb.append(" ORDER BY ");
} else {
sb.append(", ");
}
final SelectItem selectItem = orderByItem.getSelectItem();
validateSoqlSupportedSelectItem(selectItem);
final Column column = selectItem.getColumn();
sb.append(column.getName());
sb.append(' ');
sb.append(orderByItem.getDirection());
i++;
}
final Integer firstRow = query.getFirstRow();
final Integer maxRows = query.getMaxRows();
if (maxRows != null && maxRows > 0) {
if (firstRow != null) {
// add first row / offset to avoid missing some records.
sb.append(" LIMIT " + (maxRows + firstRow - 1));
} else {
sb.append(" LIMIT " + maxRows);
}
}
final QueryResult result = executeSoqlQuery(sb.toString());
DataSet dataSet = new SalesforceDataSet(columns, result, _connection);
if (firstRow != null) {
// OFFSET is still only a developer preview feature of SFDC. See
// http://www.salesforce.com/us/developer/docs/api/Content/sforce_api_calls_soql_select_offset.htm
dataSet = new FirstRowDataSet(dataSet, firstRow.intValue());
}
return dataSet;
} catch (UnsupportedOperationException e) {
logger.debug(
"Failed to rewrite query to SOQL, falling back to regular query post-processing", e);
return super.executeQuery(query);
}
}
public SatisfiedOrderByBuilderImpl(
FunctionType function, Column column, Query query, GroupedQueryBuilder queryBuilder) {
super(queryBuilder);
orderByitem = new OrderByItem(new SelectItem(function, column));
query.orderBy(orderByitem);
}