mondrian.spi.impl
Class VerticaDialect

java.lang.Object
  mondrian.spi.impl.JdbcDialectImpl
      mondrian.spi.impl.VerticaDialect

All Implemented Interfaces:

Dialect

public class VerticaDialect
extends JdbcDialectImpl

Implementation of Dialect for the Vertica database.

Since:

Sept 11, 2009

Author:

Pedro Alves

Nested Class Summary

Nested classes/interfaces inherited from interface mondrian.spi.Dialect

Dialect.DatabaseProduct, Dialect.Datatype

Field Summary

static JdbcDialectFactory

FACTORY

Fields inherited from class mondrian.spi.impl.JdbcDialectImpl

databaseProduct, permitsSelectNotInGroupBy, productVersion

Constructor Summary

VerticaDialect(Connection connection)
Creates a VerticaDialect.

Method Summary

boolean	allowsCountDistinct() Returns whether this Dialect supports distinct aggregations.
boolean	allowsFromQuery() Returns whether this Dialect allows a subquery in the from clause, for example SELECT * FROM (SELECT * FROM t) AS x
String	generateInline(List<String> columnNames, List<String> columnTypes, List<String[]> valueList) Generates a SQL statement to represent an inline dataset.
Dialect.DatabaseProduct	getDatabaseProduct() Returns the database for this Dialect, or Dialect.DatabaseProduct.UNKNOWN if the database is not a common database.
boolean	requiresAliasForFromQuery() Returns whether this Dialect requires subqueries in the FROM clause to have an alias.
boolean	supportsResultSetConcurrency(int type, int concurrency) Returns whether this Dialect supports the given concurrency type in combination with the given result set type.

Methods inherited from class mondrian.spi.impl.JdbcDialectImpl

allowsAs, allowsCompoundCountDistinct, allowsDdl, allowsDialectSharing, allowsJoinOn, allowsMultipleCountDistinct, allowsMultipleDistinctSqlMeasures, allowsOrderByAlias, allowsRegularExpressionInWhereClause, allowsSelectNotInGroupBy, appendHintsAfterFromClause, caseWhenElse, deduceIdentifierQuoteString, deduceMaxColumnNameLength, deduceProductName, deduceProductVersion, deduceReadOnly, deduceSupportedResultSetStyles, deduceSupportsSelectNotInGroupBy, generateCountExpression, generateInlineForAnsi, generateInlineGeneric, generateOrderByNulls, generateOrderByNullsAnsi, generateOrderItem, generateOrderItem, generateRegularExpression, getMaxColumnNameLength, getProduct, getQuoteIdentifierString, needsExponent, quote, quoteBooleanLiteral, quoteDateLiteral, quoteDateLiteral, quoteIdentifier, quoteIdentifier, quoteIdentifier, quoteIdentifier, quoteNumericLiteral, quoteStringLiteral, quoteTimeLiteral, quoteTimestampLiteral, requiresGroupByAlias, requiresHavingAlias, requiresOrderByAlias, requiresUnionOrderByExprToBeInSelectClause, requiresUnionOrderByOrdinal, supportsGroupByExpressions, supportsGroupingSets, supportsMultiValueInExpr, supportsUnlimitedValueList, toString, toUpper

Methods inherited from class java.lang.Object

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

Field Detail

FACTORY

public static final JdbcDialectFactory FACTORY

Constructor Detail

VerticaDialect

public VerticaDialect(Connection connection)
               throws SQLException

Creates a VerticaDialect.

Parameters:

connection - Connection

Throws:

SQLException

Method Detail

requiresAliasForFromQuery

public boolean requiresAliasForFromQuery()

Description copied from interface: Dialect

Returns whether this Dialect requires subqueries in the FROM clause to have an alias.

Specified by:

requiresAliasForFromQuery in interface Dialect

Overrides:

requiresAliasForFromQuery in class JdbcDialectImpl

Returns:

whether dialewct requires subqueries to have an alias

See Also:

Dialect.allowsFromQuery()

allowsFromQuery

public boolean allowsFromQuery()

Description copied from interface: Dialect

Returns whether this Dialect allows a subquery in the from clause, for example

SELECT * FROM (SELECT * FROM t) AS x

Specified by:

allowsFromQuery in interface Dialect

Overrides:

allowsFromQuery in class JdbcDialectImpl

Returns:

whether Dialect allows subquery in FROM clause

See Also:

Dialect.requiresAliasForFromQuery()

allowsCountDistinct

public boolean allowsCountDistinct()

Description copied from interface: Dialect

Returns whether this Dialect supports distinct aggregations.

For example, Access does not allow

select count(distinct x) from t

Specified by:

allowsCountDistinct in interface Dialect

Overrides:

allowsCountDistinct in class JdbcDialectImpl

Returns:

whether Dialect allows COUNT DISTINCT

getDatabaseProduct

public Dialect.DatabaseProduct getDatabaseProduct()

Description copied from interface: Dialect

Returns the database for this Dialect, or Dialect.DatabaseProduct.UNKNOWN if the database is not a common database.

Specified by:

getDatabaseProduct in interface Dialect

Overrides:

getDatabaseProduct in class JdbcDialectImpl

Returns:

Database

supportsResultSetConcurrency

public boolean supportsResultSetConcurrency(int type,
                                            int concurrency)

Description copied from interface: Dialect

Returns whether this Dialect supports the given concurrency type in combination with the given result set type.

The result is similar to DatabaseMetaData.supportsResultSetConcurrency(int, int), except that the JdbcOdbc bridge in JDK 1.6 overstates its abilities. See bug 1690406.

Specified by:

supportsResultSetConcurrency in interface Dialect

Overrides:

supportsResultSetConcurrency in class JdbcDialectImpl

Parameters:

type - defined in ResultSet

concurrency - type defined in ResultSet

Returns:

true if so; false otherwise

generateInline

public String generateInline(List<String> columnNames,
                             List<String> columnTypes,
                             List<String[]> valueList)

Description copied from interface: Dialect

Generates a SQL statement to represent an inline dataset.

For example, for Oracle, generates

 SELECT 1 AS FOO, 'a' AS BAR FROM dual
 UNION ALL
 SELECT 2 AS FOO, 'b' AS BAR FROM dual
 

For ANSI SQL, generates:

 VALUES (1, 'a'), (2, 'b')
 

Specified by:

generateInline in interface Dialect

Overrides:

generateInline in class JdbcDialectImpl

Parameters:

columnNames - List of column names

columnTypes - List of column types ("String" or "Numeric")

valueList - List of rows values

Returns:

SQL string