edu.umich.verdict.query

Class DescribeTableQuery

java.lang.Object

edu.umich.verdict.query.Query

edu.umich.verdict.query.SelectQuery

edu.umich.verdict.query.DescribeTableQuery

public class DescribeTableQuery
extends SelectQuery

Nested Class Summary

Nested classes/interfaces inherited from class edu.umich.verdict.query.Query

Query.Type

Field Summary

Fields inherited from class edu.umich.verdict.query.Query

df, queryString, rs, vc

Constructor Summary

Constructors

Constructor and Description
DescribeTableQuery(VerdictContext vc, String q)

Method Summary

Modifier and Type	Method and Description
void	compute() This is the main entry point for all Verdict queries.

Methods inherited from class edu.umich.verdict.query.Query

computeDataFrame, computeResultSet, getDataFrame, getInstance, getQueryString, getResultSet, getStatementType, isUpdateType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DescribeTableQuery

public DescribeTableQuery(VerdictContext vc,
                          String q)

Method Detail

compute

public void compute()
             throws VerdictException

Description copied from class: Query

This is the main entry point for all Verdict queries. Whether a given query expects a result set to be returned will be determined by analyzing the query itself. For instance, "CREATE TABLE" query should not expect any result set to be returned, while "SELECT ..." query expects a result set. Verdict recognizes the following types of queries. A. Types of the queries that expect a result set: 1. SELECT ... 2. DESCRIBE TABLE 3. USE DATABASE (empty result set) 4. SHOW TABLES 5. SHOW DATABASES 6. SHOW SAMPLE B. Types of the queries that expect updates. 1. CREAET SAMPLE 2. DROP SAMPLE 3. CREATE TABLE (AS SELECT) (TODO) 4. DROP TABLE (TODO) 5. DELETE FROM (TODO) 6. CREATE VIEW (TODO) 7. DROP VIEW (TODO)

Overrides:

compute in class SelectQuery

Throws:

VerdictException