public static void main(String[] args) throws IOException {
DatabaseCatalog tableMap = DatabaseCatalog.getInstance();
tableMap.autogetTableInfo();
System.out.println(tableMap.getTableLocated("Sailors"));
Schema schema = Schema.getInstance();
schema.getSchemaInfor("/Users/hanwenwang/Desktop/samples/input/db/schema.txt");
try {
CCJSqlParser parser =
new CCJSqlParser(new FileReader("/Users/hanwenwang/Desktop/queries 2.sql"));
Statement statement;
while ((statement = parser.Statement()) != null) {
Select select = (Select) statement;
System.out.println("Select body is " + select.getSelectBody());
PlainSelect plainSelect = (PlainSelect) select.getSelectBody();
System.out.println(plainSelect.getSelectItems().toString());
ScanOperator scanOperator = new ScanOperator(plainSelect.getFromItem().toString());
SelectOperator selectOperator = new SelectOperator(scanOperator, plainSelect.getWhere());
ProjectOperator projectOperator =
new ProjectOperator(selectOperator, plainSelect.getSelectItems());
projectOperator.dump();
}
} catch (Exception e) {
System.err.println("Exception occurred during parsing");
e.printStackTrace();
}
}
@Override
public void visit(PlainSelect plainSelect) {
firstRun = true;
counter = 0;
aliases.clear();
for (SelectItem item : plainSelect.getSelectItems()) {
item.accept(this);
}
firstRun = false;
for (SelectItem item : plainSelect.getSelectItems()) {
item.accept(this);
}
}
public static void main(String[] args) throws IOException {
// get the information of table address
DatabaseCatalog databaseCatalog = DatabaseCatalog.getInstance();
databaseCatalog.autogetTableInfo();
Schema schema = Schema.getInstance();
schema.getSchemaInfor("samples/input/db/schema.txt");
Aliases aliases = Aliases.getInstance();
// aliases.addaliase("S", "Sailors");
// ScanOperator scanOperator = new ScanOperator("S");
// scanOperator.dump();
try {
CCJSqlParser parser =
new CCJSqlParser(new FileReader("/Users/hanwenwang/Desktop/queries.sql"));
Statement statement;
while ((statement = parser.Statement()) != null) {
Select select = (Select) statement;
System.out.println("Select body is " + select.getSelectBody());
PlainSelect plainSelect = (PlainSelect) select.getSelectBody();
String aliasName = ((Table) plainSelect.getFromItem()).getAlias();
String tableName = ((Table) plainSelect.getFromItem()).getName();
aliases.addaliase(aliasName, tableName);
ScanOperator scanOperator1 = new ScanOperator(aliasName);
// scanOperator1.dump();
ProjectOperator projectOperator =
new ProjectOperator(scanOperator1, plainSelect.getSelectItems());
projectOperator.dump();
}
} catch (Exception e) {
System.err.println("Exception occurred during parsing");
e.printStackTrace();
}
}
public void testSelectItems() throws JSQLParserException {
String statement =
"SELECT myid AS MYID, mycol, tab.*, schema.tab.*, mytab.mycol2, myschema.mytab.mycol, myschema.mytab.* FROM mytable WHERE mytable.col = 9";
PlainSelect plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
assertEquals("MYID", ((SelectExpressionItem) plainSelect.getSelectItems().get(0)).getAlias());
assertEquals(
"mycol",
((Column) ((SelectExpressionItem) plainSelect.getSelectItems().get(1)).getExpression())
.getColumnName());
assertEquals(
"tab", ((AllTableColumns) plainSelect.getSelectItems().get(2)).getTable().getName());
assertEquals(
"schema",
((AllTableColumns) plainSelect.getSelectItems().get(3)).getTable().getSchemaName());
assertEquals(
"schema.tab",
((AllTableColumns) plainSelect.getSelectItems().get(3)).getTable().getWholeTableName());
assertEquals(
"mytab.mycol2",
((Column) ((SelectExpressionItem) plainSelect.getSelectItems().get(4)).getExpression())
.getWholeColumnName());
assertEquals(
"myschema.mytab.mycol",
((Column) ((SelectExpressionItem) plainSelect.getSelectItems().get(5)).getExpression())
.getWholeColumnName());
assertEquals(
"myschema.mytab",
((AllTableColumns) plainSelect.getSelectItems().get(6)).getTable().getWholeTableName());
assertEquals(statement, "" + plainSelect);
statement =
"SELECT myid AS MYID, (SELECT MAX(ID) AS myid2 FROM mytable2) AS myalias FROM mytable WHERE mytable.col = 9";
plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
assertEquals(
"myalias", ((SelectExpressionItem) plainSelect.getSelectItems().get(1)).getAlias());
assertEquals(statement, "" + plainSelect);
statement = "SELECT (myid + myid2) AS MYID FROM mytable WHERE mytable.col = 9";
plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
assertEquals("MYID", ((SelectExpressionItem) plainSelect.getSelectItems().get(0)).getAlias());
assertEquals(statement, "" + plainSelect);
}
@Override
public void visit(PlainSelect plainSelect) {
log.debug("visit(PlainSelect) " + plainSelect);
enterPlainSelect(plainSelect);
this.visitingPart = VisitingPart.SELECT_ITEM;
List<SelectItem> selectItems = plainSelect.getSelectItems();
if (selectItems != null) for (SelectItem s : selectItems) s.accept(this.expressionNavigator);
log.debug("visit(PlainSelect) done");
leavePlainSelect();
}
public static SeQueryInfo parse(ISession session, PlainSelect select)
throws SeException, IOException {
String[] columns = null;
String[] tables = null;
String where = null;
String orderAndOrGroupByClause = null;
if (LOGGER.isLoggable(Level.FINER)) {
LOGGER.finer("building SeQueryInfo to reflect " + select);
}
// obtain needed SeQueryInfo components
columns = getColumns(session, select.getSelectItems());
tables = getTables(select.getFromItems());
Expression whereClause = select.getWhere();
if (whereClause != null) {
where = whereClause.toString();
}
if (select.getGroupByColumnReferences() != null
&& select.getGroupByColumnReferences().size() > 0) {
String gb = PlainSelect.getFormatedList(select.getGroupByColumnReferences(), " GROUP BY ");
orderAndOrGroupByClause = gb;
}
if (select.getOrderByElements() != null && select.getOrderByElements().size() > 0) {
String ob = PlainSelect.orderByToString(select.getOrderByElements());
if (orderAndOrGroupByClause == null) {
orderAndOrGroupByClause = "";
}
orderAndOrGroupByClause += " " + ob;
}
// build SeQueryInfo
SeQueryInfo qinfo = new SeQueryInfo();
qinfo.setColumns(columns);
SeSqlConstruct sqlConstruct = new SeSqlConstruct();
sqlConstruct.setTables(tables);
if (where != null) {
sqlConstruct.setWhere(where);
}
qinfo.setConstruct(sqlConstruct);
if (orderAndOrGroupByClause != null) {
qinfo.setByClause(orderAndOrGroupByClause);
}
return qinfo;
}
@SuppressWarnings("unchecked")
@Override
public void visit(PlainSelect select) {
if (!CollectionUtils.isEmpty(select.getGroupByColumnReferences())
|| !CollectionUtils.isEmpty(select.getJoins())) {
isSimple = false;
} else {
select.getFromItem().accept(this);
for (SelectItem item : (List<SelectItem>) select.getSelectItems()) {
item.accept(this);
}
}
}
public void testFunctions() throws JSQLParserException {
String statement = "SELECT MAX(id) as max FROM mytable WHERE mytable.col = 9";
PlainSelect select =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
assertEquals("max", ((SelectExpressionItem) select.getSelectItems().get(0)).getAlias());
assertEquals(statement.toUpperCase(), select.toString().toUpperCase());
statement = "SELECT MAX(id), AVG(pro) as myavg FROM mytable WHERE mytable.col = 9 GROUP BY pro";
select =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
assertEquals("myavg", ((SelectExpressionItem) select.getSelectItems().get(1)).getAlias());
assertEquals(statement.toUpperCase(), select.toString().toUpperCase());
statement = "SELECT MAX(a, b, c), COUNT(*), D FROM tab1 GROUP BY D";
PlainSelect plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
Function fun =
(Function) ((SelectExpressionItem) plainSelect.getSelectItems().get(0)).getExpression();
assertEquals("MAX", fun.getName());
assertEquals("b", ((Column) fun.getParameters().getExpressions().get(1)).getWholeColumnName());
assertTrue(
((Function) ((SelectExpressionItem) plainSelect.getSelectItems().get(1)).getExpression())
.isAllColumns());
assertEquals(statement.toUpperCase(), plainSelect.toString().toUpperCase());
statement = "SELECT {fn MAX(a, b, c)}, COUNT(*), D FROM tab1 GROUP BY D";
plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
fun = (Function) ((SelectExpressionItem) plainSelect.getSelectItems().get(0)).getExpression();
assertTrue(fun.isEscaped());
assertEquals("MAX", fun.getName());
assertEquals("b", ((Column) fun.getParameters().getExpressions().get(1)).getWholeColumnName());
assertTrue(
((Function) ((SelectExpressionItem) plainSelect.getSelectItems().get(1)).getExpression())
.isAllColumns());
assertEquals(statement.toUpperCase(), plainSelect.toString().toUpperCase());
statement = "SELECT ab.MAX(a, b, c), cd.COUNT(*), D FROM tab1 GROUP BY D";
plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
fun = (Function) ((SelectExpressionItem) plainSelect.getSelectItems().get(0)).getExpression();
assertEquals("ab.MAX", fun.getName());
assertEquals("b", ((Column) fun.getParameters().getExpressions().get(1)).getWholeColumnName());
fun = (Function) ((SelectExpressionItem) plainSelect.getSelectItems().get(1)).getExpression();
assertEquals("cd.COUNT", fun.getName());
assertTrue(fun.isAllColumns());
assertEquals(statement.toUpperCase(), plainSelect.toString().toUpperCase());
}
public void testDistinct() throws JSQLParserException {
String statement = "SELECT DISTINCT ON (myid) myid, mycol FROM mytable WHERE mytable.col = 9";
PlainSelect plainSelect =
(PlainSelect) ((Select) parserManager.parse(new StringReader(statement))).getSelectBody();
assertEquals(
"myid",
((Column)
((SelectExpressionItem) plainSelect.getDistinct().getOnSelectItems().get(0))
.getExpression())
.getColumnName());
assertEquals(
"mycol",
((Column) ((SelectExpressionItem) plainSelect.getSelectItems().get(1)).getExpression())
.getColumnName());
assertEquals(statement.toUpperCase(), plainSelect.toString().toUpperCase());
}
/** @brief The following functions override functions of the interfaces. */
public void visit(PlainSelect plainSelect) throws Exception {
if (plainSelect.getFromItem() != null) {
if (plainSelect.getFromItem().getAlias() != null) {
this.aliasTableNameList.add(plainSelect.getFromItem().getAlias().getName());
}
plainSelect.getFromItem().accept(this);
}
if (plainSelect.getJoins() != null) {
for (Iterator joinsIt = plainSelect.getJoins().iterator(); joinsIt.hasNext(); ) {
Join join = (Join) joinsIt.next();
if (join.getRightItem().getAlias() != null) {
this.aliasTableNameList.add(join.getRightItem().getAlias().getName());
}
if (join.getOnExpression() != null) {
join.getOnExpression().accept(this);
}
join.getRightItem().accept(this);
}
}
// Select selectItem From fromItem, joinItem Where whereClause.
if (plainSelect.getSelectItems() != null) {
for (SelectItem selectItem : plainSelect.getSelectItems()) {
selectItem.accept(this);
}
}
if (plainSelect.getWhere() != null) {
plainSelect.getWhere().accept(this);
}
if (plainSelect.getGroupByColumnReferences() != null) {
for (Iterator groupByIt = plainSelect.getGroupByColumnReferences().iterator();
groupByIt.hasNext(); ) {
Expression groupBy = (Expression) groupByIt.next();
groupBy.accept(this);
}
}
if (plainSelect.getClusterByElements() != null) {
for (Iterator clusterByit = plainSelect.getClusterByElements().iterator();
clusterByit.hasNext(); ) {
ClusterByElement clusterByElement = (ClusterByElement) clusterByit.next();
visit(clusterByElement);
}
}
if (plainSelect.getDistributeByElements() != null) {
for (Iterator distributeByIt = plainSelect.getDistributeByElements().iterator();
distributeByIt.hasNext(); ) {
DistributeByElement distributeByElement = (DistributeByElement) distributeByIt.next();
visit(distributeByElement);
}
}
if (plainSelect.getOrderByElements() != null) {
for (Iterator orderByIt = plainSelect.getOrderByElements().iterator();
orderByIt.hasNext(); ) {
OrderByElement orderByElement = (OrderByElement) orderByIt.next();
orderByElement.accept(this);
}
}
if (plainSelect.getSortByElements() != null) {
for (Iterator sortByIt = plainSelect.getSortByElements().iterator(); sortByIt.hasNext(); ) {
SortByElement sortByElement = (SortByElement) sortByIt.next();
visit(sortByElement);
}
}
if (plainSelect.getHaving() != null) {
plainSelect.getHaving().accept(this);
}
}
