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java.lang.Objectmondrian.spi.impl.JdbcDialectImpl
mondrian.spi.impl.HsqldbDialect
public class HsqldbDialect
Implementation of Dialect
for the Hsqldb 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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HsqldbDialect(java.sql.Connection connection)
Creates a FirebirdDialect. |
Method Summary | |
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java.lang.String |
generateInline(java.util.List<java.lang.String> columnNames,
java.util.List<java.lang.String> columnTypes,
java.util.List<java.lang.String[]> valueList)
Generates a SQL statement to represent an inline dataset. |
java.lang.String |
generateOrderItem(java.lang.String expr,
boolean nullable,
boolean ascending)
Generates an item for an ORDER BY clause, sorting in the required direction, and ensuring that NULL values collate after all non-NULL values. |
Dialect.NullCollation |
getNullCollation()
Returns the rule which determines whether NULL values appear first or last when sorted using ORDER BY. |
protected void |
quoteDateLiteral(java.lang.StringBuilder buf,
java.lang.String value,
java.sql.Date date)
Helper method for JdbcDialectImpl.quoteDateLiteral(StringBuilder, String) . |
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 HsqldbDialect(java.sql.Connection connection) throws java.sql.SQLException
connection
- Connection
java.sql.SQLException
Method Detail |
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protected void quoteDateLiteral(java.lang.StringBuilder buf, java.lang.String value, java.sql.Date date)
JdbcDialectImpl
JdbcDialectImpl.quoteDateLiteral(StringBuilder, String)
.
quoteDateLiteral
in class JdbcDialectImpl
buf
- Buffer to append tovalue
- Value as stringdate
- Value as datepublic Dialect.NullCollation getNullCollation()
Dialect
According to the SQL standard, this is implementation-specific.
The default behavior is
Dialect.NullCollation.POSINF
.
getNullCollation
in interface Dialect
getNullCollation
in class JdbcDialectImpl
public java.lang.String generateOrderItem(java.lang.String expr, boolean nullable, boolean ascending)
Dialect
By default, generateOrderItem(expr, true)
generates "expr ASC"
and generateOrderItem(expr, false)
generates "expr DESC". But
depending on Dialect.getNullCollation()
and ascending
, there
may need to be additional code.
For example, on Oracle, where NULLs collate higher than all other
values, generateOrderItem(expr, true)
generates "expr ASC" and
generateOrderItem(expr, false)
generates "expr DESC NULLS LAST".
On MySQL, where NULLs collate lower than all other values,
generateOrderItem(expr, true)
generates "ISNULL(expr), expr ASC"
and generateOrderItem(expr, false)
generates "expr DESC".
generateOrderItem
in interface Dialect
generateOrderItem
in class JdbcDialectImpl
expr
- Expressionnullable
- Whether expression may have NULL valuesascending
- Whether to sort expression ascending
public java.lang.String generateInline(java.util.List<java.lang.String> columnNames, java.util.List<java.lang.String> columnTypes, java.util.List<java.lang.String[]> valueList)
Dialect
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')
generateInline
in interface Dialect
generateInline
in class JdbcDialectImpl
columnNames
- List of column namescolumnTypes
- List of column types ("String" or "Numeric")valueList
- List of rows values
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