org.javalite.activejdbc.dialects

Class OracleDialect

java.lang.Object

org.javalite.activejdbc.dialects.DefaultDialect

org.javalite.activejdbc.dialects.OracleDialect

All Implemented Interfaces:

Serializable, Dialect

public class OracleDialect
extends DefaultDialect

Author:

Igor Polevoy, Eric Nielsen

See Also:

Serialized Form

Field Summary

Fields inherited from class org.javalite.activejdbc.dialects.DefaultDialect

GROUP_BY_PATTERN, ORDER_BY_PATTERN

Constructor Summary

Constructors

Constructor and Description
OracleDialect()

Method Summary

Modifier and Type	Method and Description
protected void	appendEmptyRow(MetaModel metaModel, StringBuilder query)
protected void	appendTime(StringBuilder query, Time value)
String	formSelect(String tableName, String[] columns, String subQuery, List<String> orderBys, long limit, long offset) Example of a query we are building here:

Methods inherited from class org.javalite.activejdbc.dialects.DefaultDialect

appendDate, appendOrderBy, appendQuestions, appendSelect, appendSubQuery, appendTimestamp, appendValue, deleteManyToManyAssociation, insert, insertManyToManyAssociation, insertParametrized, overrideDriverTypeConversion, selectCount, selectCount, selectExists, selectManyToManyAssociation, selectStar, selectStar, selectStarParametrized, update

Methods inherited from class java.lang.Object

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

Constructor Detail

OracleDialect

public OracleDialect()

Method Detail

formSelect

public String formSelect(String tableName,
                         String[] columns,
                         String subQuery,
                         List<String> orderBys,
                         long limit,
                         long offset)

Example of a query we are building here:

 SELECT * FROM (
   SELECT t2.*, ROWNUM AS oracle_row_number FROM (
     SELECT t.* FROM pages t WHERE <conditions> ORDER BY id
   ) t2
 ) WHERE oracle_row_number >= 20 AND rownum <= 10;
 

Look here for reference: Oracle: ROW_NUMBER vs ROWNUM

Specified by:

formSelect in interface Dialect

Overrides:

formSelect in class DefaultDialect

Parameters:

tableName - name of table. If table name is null, then the subQuery parameter is considered to be a full query, and all that needs to be done is to add limit, offset and order bys

columns - not used in this implementation.

subQuery - sub query, something like: "name = ? AND ssn = ?". It can be blank: "" or null;

orderBys - collection of order by: "dob desc" - one example

limit - limit value, -1 if not needed.

offset - offset value, -1 if not needed.

Returns:

Oracle - specific select query. Here is one example:

SELECT * FROM (SELECT t2.*, ROWNUM AS oracle_row_number FROM (SELECT t.* FROM pages t WHERE <conditions> ORDER BY id) t2) WHERE oracle_row_number >= 20 AND rownum <= 10;

Can't think of an uglier thing. Shame on you, Oracle.

appendEmptyRow

protected void appendEmptyRow(MetaModel metaModel,
                              StringBuilder query)

Overrides:

appendEmptyRow in class DefaultDialect

appendTime

protected void appendTime(StringBuilder query,
                          Time value)

Overrides:

appendTime in class DefaultDialect