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java.lang.Objectmondrian.spi.impl.JdbcDialectImpl
mondrian.spi.impl.PostgreSqlDialect
public class PostgreSqlDialect
Implementation of Dialect
for the PostgreSQL database.
Nested Class Summary |
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Nested classes/interfaces inherited from interface mondrian.spi.Dialect |
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Dialect.DatabaseProduct, Dialect.Datatype, Dialect.NullCollation |
Field Summary | |
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static JdbcDialectFactory |
FACTORY
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Fields inherited from class mondrian.spi.impl.JdbcDialectImpl |
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databaseProduct, permitsSelectNotInGroupBy, productVersion |
Constructor Summary | |
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PostgreSqlDialect(java.sql.Connection connection)
Creates a PostgreSqlDialect. |
Method Summary | |
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boolean |
requiresAliasForFromQuery()
Returns whether this Dialect requires subqueries in the FROM clause to have an alias. |
boolean |
supportsOrderByNullsLast()
Returns whether this dialect supports "ASC NULLS LAST" and "DESC NULLS LAST" applied to an item in the ORDER BY clause. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final JdbcDialectFactory FACTORY
Constructor Detail |
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public PostgreSqlDialect(java.sql.Connection connection) throws java.sql.SQLException
connection
- Connection
java.sql.SQLException
Method Detail |
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public boolean requiresAliasForFromQuery()
Dialect
requiresAliasForFromQuery
in interface Dialect
requiresAliasForFromQuery
in class JdbcDialectImpl
Dialect.allowsFromQuery()
public boolean supportsOrderByNullsLast()
JdbcDialectImpl
This feature is in standard SQL but is not supported by many
databases, therefore the default implementation returns false
.
This method is only called from
JdbcDialectImpl.generateOrderItem(String, boolean, boolean)
. Some dialects
override that method and therefore never call this method.
supportsOrderByNullsLast
in class JdbcDialectImpl
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