Package org.hibernate.dialect.pagination
Class SybaseASE157LimitHandler
- java.lang.Object
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- org.hibernate.dialect.pagination.AbstractLimitHandler
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- org.hibernate.dialect.pagination.SybaseASE157LimitHandler
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- All Implemented Interfaces:
LimitHandler
public class SybaseASE157LimitHandler extends AbstractLimitHandler
This limit handler is very conservative and is only triggered in simple cases involving a select or select distinct.Note that if the query already contains "top" just after the select or select distinct, we don't add anything to the query. It might just be a column name but, in any case, we just don't add the top clause and default to the previous behavior so it's not an issue.
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Constructor Summary
Constructors Constructor Description SybaseASE157LimitHandler()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
processSql(java.lang.String sql, RowSelection selection)
Return processed SQL query.boolean
supportsLimit()
Does this handler support some form of limiting query results via a SQL clause?boolean
supportsLimitOffset()
Does this handler's LIMIT support (if any) additionally support specifying an offset?boolean
supportsVariableLimit()
Does this handler support bind variables (i.e., prepared statement parameters) for its limit/offset?boolean
useMaxForLimit()
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?-
Methods inherited from class org.hibernate.dialect.pagination.AbstractLimitHandler
bindLimitParameters, bindLimitParametersAtEndOfQuery, bindLimitParametersAtStartOfQuery, bindLimitParametersFirst, bindLimitParametersInReverseOrder, convertToFirstRowValue, forceLimitUsage, getMaxOrLimit, setMaxRows
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.hibernate.dialect.pagination.LimitHandler
processSql
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Method Detail
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processSql
public java.lang.String processSql(java.lang.String sql, RowSelection selection)
Description copied from interface:LimitHandler
Return processed SQL query.- Specified by:
processSql
in interfaceLimitHandler
- Overrides:
processSql
in classAbstractLimitHandler
- Parameters:
sql
- the SQL query to process.selection
- the selection criteria for rows.- Returns:
- Query statement with LIMIT clause applied.
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supportsLimit
public boolean supportsLimit()
Description copied from interface:LimitHandler
Does this handler support some form of limiting query results via a SQL clause?- Specified by:
supportsLimit
in interfaceLimitHandler
- Overrides:
supportsLimit
in classAbstractLimitHandler
- Returns:
- True if this handler supports some form of LIMIT.
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supportsLimitOffset
public boolean supportsLimitOffset()
Description copied from interface:LimitHandler
Does this handler's LIMIT support (if any) additionally support specifying an offset?- Specified by:
supportsLimitOffset
in interfaceLimitHandler
- Overrides:
supportsLimitOffset
in classAbstractLimitHandler
- Returns:
- True if the handler supports an offset within the limit support.
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useMaxForLimit
public boolean useMaxForLimit()
Description copied from class:AbstractLimitHandler
Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows? This is easiest understood via an example. Consider you have a table with 20 rows, but you only want to retrieve rows number 11 through 20. Generally, a limit with offset would say that the offset = 11 and the limit = 10 (we only want 10 rows at a time); this is specifying the total number of returned rows. Some dialects require that we instead specify offset = 11 and limit = 20, where 20 is the "last" row we want relative to offset (i.e. total number of rows = 20 - 11 = 9) So essentially, is limit relative from offset? Or is limit absolute?- Overrides:
useMaxForLimit
in classAbstractLimitHandler
- Returns:
- True if limit is relative from offset; false otherwise.
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supportsVariableLimit
public boolean supportsVariableLimit()
Description copied from class:AbstractLimitHandler
Does this handler support bind variables (i.e., prepared statement parameters) for its limit/offset?- Overrides:
supportsVariableLimit
in classAbstractLimitHandler
- Returns:
- True if bind variables can be used; false otherwise.
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