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Copy pathtestExplain.java
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package athena;
import gudusoft.gsqlparser.EDbVendor;
import gudusoft.gsqlparser.ESqlStatementType;
import gudusoft.gsqlparser.TGSqlParser;
import gudusoft.gsqlparser.stmt.TExplainPlan;
import gudusoft.gsqlparser.stmt.TSelectSqlStatement;
import junit.framework.TestCase;
public class testExplain extends TestCase {
public void testSelect() {
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvathena);
sqlparser.sqltext = "EXPLAIN (FORMAT GRAPHVIZ)\n" +
"SELECT \n" +
" c.c_custkey,\n" +
" o.o_orderkey,\n" +
" o.o_orderstatus\n" +
" FROM tpch100.customer c \n" +
" JOIN tpch100.orders o \n" +
" ON c.c_custkey = o.o_custkey \n" +
" WHERE c.c_custkey = 5566684;";
assertTrue(sqlparser.parse() == 0);
assertTrue(sqlparser.sqlstatements.get(0).sqlstatementtype == ESqlStatementType.sstExplain);
TExplainPlan explainPlan = (TExplainPlan) sqlparser.sqlstatements.get(0);
assertTrue(explainPlan.getStatement().sqlstatementtype == ESqlStatementType.sstselect);
TSelectSqlStatement selectSqlStatement = (TSelectSqlStatement) explainPlan.getStatement();
assertTrue(selectSqlStatement.getTables().getTable(0).getTableName().toString().equalsIgnoreCase("tpch100.customer"));
}
}