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package hive;
import gudusoft.gsqlparser.*;
import gudusoft.gsqlparser.nodes.*;
import gudusoft.gsqlparser.stmt.TCreateViewSqlStatement;
import gudusoft.gsqlparser.stmt.TSelectSqlStatement;
import gudusoft.gsqlparser.stmt.hive.THiveFromQuery;
import junit.framework.TestCase;
/**
* Created by IntelliJ IDEA.
* User: tako
* Date: 13-8-11
* Time: 下午6:32
* To change this template use File | Settings | File Templates.
*/
public class testUnion extends TestCase {
public void testUnionInSubquery(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvhive);
sqlparser.sqltext ="SELECT t3.col\n" +
"FROM (\n" +
" SELECT a+b AS col\n" +
" FROM t1\n" +
" UNION ALL\n" +
" SELECT c-d AS col\n" +
" FROM t2\n" +
") t3;";
assertTrue(sqlparser.parse() == 0);
TSelectSqlStatement select = (TSelectSqlStatement)sqlparser.sqlstatements.get(0);
assertTrue(select.getResultColumnList().size() == 1);
assertTrue(select.joins.size() == 1);
TJoin join = select.joins.getJoin(0);
assertTrue(join.getKind() == TBaseType.join_source_fake);
TTable table = join.getTable();
assertTrue(table.getTableType() == ETableSource.subquery);
TSelectSqlStatement subquery = table.getSubquery();
assertTrue(subquery.isCombinedQuery());
TSelectSqlStatement left = subquery.getLeftStmt();
TSelectSqlStatement right = subquery.getRightStmt();
TResultColumn rs = left.getResultColumnList().getResultColumn(0);
TExpression expr = rs.getExpr();
assertTrue(expr.getExpressionType() == EExpressionType.arithmetic_plus_t);
TAliasClause aliasClause = rs.getAliasClause();
// System.out.println(aliasClause.getAliasName().toString());
assertTrue(aliasClause.getAliasName().toString().equalsIgnoreCase("col"));
rs = right.getResultColumnList().getResultColumn(0);
expr = rs.getExpr();
assertTrue(expr.getExpressionType() == EExpressionType.arithmetic_minus_t);
}
public void test1(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvhive);
sqlparser.sqltext = "SELECT u.id, actions.date\n" +
"FROM (\n" +
" SELECT av.uid AS uid \n" +
" FROM action_video av \n" +
" WHERE av.date = '2008-06-03'\n" +
" UNION ALL \n" +
" SELECT ac.uid AS uid \n" +
" FROM action_comment ac \n" +
" WHERE ac.date = '2008-06-03'\n" +
" ) actions JOIN users u ON (u.id = actions.uid) ;";
assertTrue(sqlparser.parse() == 0);
TSelectSqlStatement select = (TSelectSqlStatement)sqlparser.sqlstatements.get(0);
assertTrue(select.joins.size() == 1);
TJoin join = select.joins.getJoin(0);
assertTrue(join.getKind() == TBaseType.join_source_table);
TTable table = join.getTable();
assertTrue(table.getTableType() == ETableSource.subquery);
TJoinItem joinItem = join.getJoinItems().getJoinItem(0);
assertTrue(joinItem.getJoinType() == EJoinType.join);
assertTrue(joinItem.getTable().getFullName().equalsIgnoreCase("users"));
TSelectSqlStatement subquery = table.getSubquery();
assertTrue(subquery.isCombinedQuery());
TSelectSqlStatement left = subquery.getLeftStmt();
TSelectSqlStatement right = subquery.getRightStmt();
TResultColumn rs = left.getResultColumnList().getResultColumn(0);
TExpression expr = rs.getExpr();
assertTrue(expr.getExpressionType() == EExpressionType.simple_object_name_t);
assertTrue(expr.toString().equalsIgnoreCase("av.uid"));
assertTrue(rs.getAliasClause().getAliasName().toString().equalsIgnoreCase("uid"));
rs = right.getResultColumnList().getResultColumn(0);
expr = rs.getExpr();
assertTrue(expr.getExpressionType() == EExpressionType.simple_object_name_t);
assertTrue(expr.toString().equalsIgnoreCase("ac.uid"));
assertTrue(rs.getAliasClause().getAliasName().toString().equalsIgnoreCase("uid"));
}
public void test2(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvhive);
sqlparser.sqltext = "FROM (\n" +
" FROM (\n" +
" FROM action_video av\n" +
" SELECT av.uid AS uid, av.id AS id, av.date AS date\n" +
" \n" +
" UNION ALL\n" +
" \n" +
" FROM action_comment ac\n" +
" SELECT ac.uid AS uid, ac.id AS id, ac.date AS date\n" +
" ) union_actions\n" +
" SELECT union_actions.uid, union_actions.id, union_actions.date\n" +
" CLUSTER BY union_actions.uid) map;";
// System.out.println(sqlparser.sqltext);
assertTrue(sqlparser.parse() == 0);
assertTrue(sqlparser.sqlstatements.get(0).sqlstatementtype == ESqlStatementType.sstselect);
TSelectSqlStatement fromQuery = (TSelectSqlStatement)sqlparser.sqlstatements.get(0);
TTable table = fromQuery.tables.getTable(0);
assertTrue(table.getTableType() == ETableSource.subquery);
assertTrue(table.getAliasClause().getAliasName().toString().equalsIgnoreCase("map"));
//assertTrue(fromQuery.getHiveBodyList().size() == 0);
TSelectSqlStatement select = table.getSubquery();
//TSelectSqlStatement select = (TSelectSqlStatement)fromQuery.getHiveBodyList().get(0);
assertTrue(select.getResultColumnList().size() == 3);
TClusterBy clusterBy = select.getClusterBy();
assertTrue(clusterBy.getExpressionList().getExpression(0).toString().equalsIgnoreCase("union_actions.uid"));
table = select.tables.getTable(0);
assertTrue(table.getTableType() == ETableSource.subquery);
assertTrue(table.getAliasClause().getAliasName().toString().equalsIgnoreCase("union_actions"));
select = table.getSubquery();
assertTrue(select.isCombinedQuery());
assertTrue(select.getSetOperator() == TSelectSqlStatement.setOperator_unionall);
// hive from query: from...select will be translated into select statement in union operation
TSelectSqlStatement left = select.getLeftStmt();
assertTrue(left.tables.getTable(0).getTableName().toString().equalsIgnoreCase("action_video"));
assertTrue(left.tables.getTable(0).getAliasClause().getAliasName().toString().equalsIgnoreCase("av"));
// hive from query: from...select will be translated into select statement in union operation
TSelectSqlStatement right = select.getRightStmt();
assertTrue(right.tables.getTable(0).getTableName().toString().equalsIgnoreCase("action_comment"));
assertTrue(right.tables.getTable(0).getAliasClause().getAliasName().toString().equalsIgnoreCase("ac"));
//assertTrue(fromQuery.getHiveBodyList().size() == 0);
}
public void testSelectUnion(){
TGSqlParser sqlparser = new TGSqlParser(EDbVendor.dbvoracle);
sqlparser.sqltext = "CREATE VIEW SAMPLE_JOIN AS SELECT \n" +
" P_DATE,\n" +
" SAMPLE_DT NAME ,\n" +
" SAMPLE_ADV_AM ADVANCE_AMOUNT,\n" +
" 'ACTIVE' AS SMPLE_STATUS\n" +
" FROM SAMPLE_TABLE SAMP,\n" +
" (SELECT 'A' DELTA_BYTE FROM DUAL\n" +
" UNION ALL\n" +
" SELECT 'C' DELTA_BYTE FROM DUAL\n" +
" UNION ALL\n" +
" SELECT 'D' DELTA_BYTE FROM DUAL\n" +
"\t\t ) BYTE_TAB\n" +
" WHERE P_DATE =\n" +
" (SELECT MAX (P_DATE)\n" +
" FROM SAMPLE_LKUP\n" +
" WHERE STATUS = 'COMPLETED')\n" +
" AND SAMP.DELTA_FILE_BYTE = BYTE_TAB.DELTA_BYTE";
assertTrue(sqlparser.parse() == 0);
TCreateViewSqlStatement createViewSqlStatement = (TCreateViewSqlStatement)sqlparser.sqlstatements.get(0);
TSelectSqlStatement select =createViewSqlStatement.getSubquery();
TSelectSqlStatement subquery = select.joins.getJoin(1).getTable().getSubquery();
TSelectSqlStatement right = subquery.getLeftStmt().getRightStmt();
assertTrue(right.toString().equalsIgnoreCase("SELECT 'C' DELTA_BYTE FROM DUAL"));
assertTrue(right.getParentStmt().toString().equalsIgnoreCase("(SELECT 'A' DELTA_BYTE FROM DUAL\n" +
" UNION ALL\n" +
" SELECT 'C' DELTA_BYTE FROM DUAL\n" +
" UNION ALL\n" +
" SELECT 'D' DELTA_BYTE FROM DUAL\n" +
"\t\t )"));
//assertTrue(select.joins.getStartToken().toString().equalsIgnoreCase("skills"));
}
}