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 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();
}
}