Package mondrian.spi.impl

Class TeradataDialect

java.lang.Object

mondrian.spi.impl.JdbcDialectImpl

mondrian.spi.impl.TeradataDialect

All Implemented Interfaces:

Dialect

public class TeradataDialect
extends JdbcDialectImpl

Implementation of Dialect for the Teradata database.

Since:

Nov 23, 2008

Author:

jhyde

Nested Class Summary

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

Dialect.DatabaseProduct, Dialect.Datatype

Field Summary

Fields

Modifier and Type	Field	Description
static final JdbcDialectFactory	FACTORY

Fields inherited from class mondrian.spi.impl.JdbcDialectImpl

databaseProduct, permitsSelectNotInGroupBy, productVersion

Constructor Summary

Constructors

Constructor	Description
TeradataDialect(Connection connection)	Creates a TeradataDialect.

Method Summary

Modifier and Type	Method	Description
String	generateInline(List<String> columnNames, List<String> columnTypes, List<String[]> valueList)	Generates a SQL statement to represent an inline dataset.
boolean	requiresAliasForFromQuery()	Returns whether this Dialect requires subqueries in the FROM clause to have an alias.
boolean	requiresUnionOrderByOrdinal()	Returns true if this dialect allows only integers in the ORDER BY clause of a UNION (or other set operation) query.
boolean	supportsGroupingSets()	Returns whether this Dialect allows the GROUPING SETS construct in the GROUP BY clause.

Methods inherited from class mondrian.spi.impl.JdbcDialectImpl

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

Methods inherited from class java.lang.Object

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

Field Details

FACTORY

public static final JdbcDialectFactory FACTORY

Constructor Details

TeradataDialect

public TeradataDialect(Connection connection)
                throws SQLException

Creates a TeradataDialect.

Parameters:

connection - Connection

Throws:

SQLException

Method Details

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()

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

supportsGroupingSets

public boolean supportsGroupingSets()

Description copied from interface: Dialect

Returns whether this Dialect allows the GROUPING SETS construct in the GROUP BY clause. Currently Greenplum, IBM DB2, Oracle, and Teradata.

Specified by:

supportsGroupingSets in interface Dialect

Overrides:

supportsGroupingSets in class JdbcDialectImpl

Returns:

Whether this Dialect allows GROUPING SETS clause

requiresUnionOrderByOrdinal

public boolean requiresUnionOrderByOrdinal()

Description copied from interface: Dialect

Returns true if this dialect allows only integers in the ORDER BY clause of a UNION (or other set operation) query.

For example, SELECT x, y + z FROM t
UNION ALL
SELECT x, y + z FROM t
ORDER BY 1, 2 is allowed but SELECT x, y, z FROM t
UNION ALL
SELECT x, y, z FROM t
ORDER BY x is not.

Teradata is an example of a dialect with this restriction.

Specified by:

requiresUnionOrderByOrdinal in interface Dialect

Overrides:

requiresUnionOrderByOrdinal in class JdbcDialectImpl

Returns:

whether this dialect allows only integers in the ORDER BY clause of a UNION (or other set operation) query