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package oracle;
/*
* Date: 13-2-1
*/
import gudusoft.gsqlparser.EDbVendor;
import gudusoft.gsqlparser.EExpressionType;
import gudusoft.gsqlparser.TGSqlParser;
import gudusoft.gsqlparser.nodes.TExpression;
import gudusoft.gsqlparser.nodes.TMultiTargetList;
import gudusoft.gsqlparser.nodes.TResultColumn;
import gudusoft.gsqlparser.stmt.TSelectSqlStatement;
import gudusoft.gsqlparser.stmt.TUpdateSqlStatement;
import gudusoft.gsqlparser.stmt.TExplainPlan;
import junit.framework.TestCase;
public class testExplainPlan extends TestCase {
public void testSelect(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvoracle);
sqlparser.sqltext = "explain plan for select * from dual;";
assertTrue(sqlparser.parse() == 0);
TExplainPlan explainPlan = (TExplainPlan)sqlparser.sqlstatements.get(0);
TSelectSqlStatement select = (TSelectSqlStatement)explainPlan.getStatement();
assertTrue(select.toString().equalsIgnoreCase("select * from dual"));
TResultColumn resultColumn = select.getResultColumnList().getResultColumn(0);
assertTrue(resultColumn.toString().equalsIgnoreCase("*"));
assertTrue(select.tables.getTable(0).toString().equalsIgnoreCase("dual"));
}
public void testUpdate(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvoracle);
sqlparser.sqltext = "EXPLAIN PLAN\n" +
"SET STATEMENT_ID = 'Raise in Tokyo'\n" +
"INTO plan_table\n" +
"FOR UPDATE employees\n" +
"SET salary = salary * 1.10\n" +
"WHERE department_id =\n" +
"(SELECT department_id FROM departments\n" +
"WHERE location_id = 1200);";
assertTrue(sqlparser.parse() == 0);
TExplainPlan explainPlan = (TExplainPlan)sqlparser.sqlstatements.get(0);
TUpdateSqlStatement update = (TUpdateSqlStatement)explainPlan.getStatement();
assertTrue(update.getTargetTable().toString().equalsIgnoreCase("employees"));
TResultColumn resultColumn = update.getResultColumnList().getResultColumn(0);
assertTrue(resultColumn.toString().equalsIgnoreCase("salary = salary * 1.10"));
TExpression expression = update.getWhereClause().getCondition();
assertTrue(expression.getRightOperand().getExpressionType() == EExpressionType.subquery_t);
TSelectSqlStatement select = expression.getRightOperand().getSubQuery();
assertTrue(select.getResultColumnList().getResultColumn(0).toString().equalsIgnoreCase("department_id"));
}
}