Package org.hibernate.dialect.function

Class NumberSeriesGenerateSeriesFunction

java.lang.Object

org.hibernate.query.sqm.function.AbstractSqmSetReturningFunctionDescriptor

org.hibernate.query.sqm.function.AbstractSqmSelfRenderingSetReturningFunctionDescriptor

org.hibernate.dialect.function.GenerateSeriesFunction

org.hibernate.dialect.function.NumberSeriesGenerateSeriesFunction

All Implemented Interfaces:

SetReturningFunctionRenderer, SqmSetReturningFunctionDescriptor

Direct Known Subclasses:

CteGenerateSeriesFunction, H2GenerateSeriesFunction, HANAGenerateSeriesFunction, SQLServerGenerateSeriesFunction, SybaseASEGenerateSeriesFunction

public abstract class NumberSeriesGenerateSeriesFunction
extends GenerateSeriesFunction

The base for generate_series function implementations that use a static number source.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	NumberSeriesGenerateSeriesFunction.NumberSeriesGenerateSeriesSetReturningFunctionTypeResolver
protected static class	NumberSeriesGenerateSeriesFunction.NumberSeriesQueryTransformer

Field Summary

Fields

Modifier and Type	Field	Description
protected final int	maxSeriesSize

Fields inherited from class org.hibernate.dialect.function.GenerateSeriesFunction

coerceToTimestamp

Constructor Summary

Constructors

Constructor	Description
NumberSeriesGenerateSeriesFunction(@Nullable String defaultValueColumnName, String defaultIndexSelectionExpression, boolean coerceToTimestamp, TypeConfiguration typeConfiguration, int maxSeriesSize)
NumberSeriesGenerateSeriesFunction(SetReturningFunctionTypeResolver setReturningFunctionTypeResolver, BasicType<Duration> durationType, boolean coerceToTimestamp, int maxSeriesSize)
NumberSeriesGenerateSeriesFunction(SetReturningFunctionTypeResolver setReturningFunctionTypeResolver, BasicType<Duration> durationType, int maxSeriesSize)

Method Summary

Modifier and Type	Method	Description
static Expression	add(Expression left, Expression right, SqmToSqlAstConverter converter)
static Expression	multiply(Expression left, int multiplier, BasicType<Integer> integerType)
static Expression	multiply(Expression left, Expression multiplier)
protected static boolean	needsVariable(Expression expression)	Returns whether a variable (e.g.
protected abstract void	renderGenerateSeries(SqlAppender sqlAppender, Expression start, Expression stop, @Nullable Expression step, AnonymousTupleTableGroupProducer tupleType, String tableIdentifierVariable, SqlAstTranslator<?> walker)

Methods inherited from class org.hibernate.dialect.function.GenerateSeriesFunction

render

Methods inherited from class org.hibernate.query.sqm.function.AbstractSqmSelfRenderingSetReturningFunctionDescriptor

generateSqmSetReturningFunctionExpression

Methods inherited from class org.hibernate.query.sqm.function.AbstractSqmSetReturningFunctionDescriptor

generateSqmExpression, getArgumentListSignature, getArgumentsValidator, getArgumentTypeResolver, getName, getSetReturningTypeResolver, getSignature

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.query.sqm.function.SetReturningFunctionRenderer

rendersIdentifierVariable

Field Details

maxSeriesSize

protected final int maxSeriesSize

Constructor Details

NumberSeriesGenerateSeriesFunction

public NumberSeriesGenerateSeriesFunction(@Nullable String defaultValueColumnName,
 String defaultIndexSelectionExpression,
 boolean coerceToTimestamp,
 TypeConfiguration typeConfiguration,
 int maxSeriesSize)

NumberSeriesGenerateSeriesFunction

public NumberSeriesGenerateSeriesFunction(SetReturningFunctionTypeResolver setReturningFunctionTypeResolver,
 BasicType<Duration> durationType,
 int maxSeriesSize)

NumberSeriesGenerateSeriesFunction

public NumberSeriesGenerateSeriesFunction(SetReturningFunctionTypeResolver setReturningFunctionTypeResolver,
 BasicType<Duration> durationType,
 boolean coerceToTimestamp,
 int maxSeriesSize)

Method Details

renderGenerateSeries

protected abstract void renderGenerateSeries(SqlAppender sqlAppender,
 Expression start,
 Expression stop,
 @Nullable Expression step,
 AnonymousTupleTableGroupProducer tupleType,
 String tableIdentifierVariable,
 SqlAstTranslator<?> walker)

Overrides:

renderGenerateSeries in class GenerateSeriesFunction

needsVariable

protected static boolean needsVariable(Expression expression)

Returns whether a variable (e.g. through values clause) shall be introduced for an expression, which is passed as argument to the generate_series function. Since the selection expression of the value column that this function returns must be transformed to the form start + step * ( iterationVariable - 1 ), it is vital that start and step can be rendered to a String during SQL AST build time for SelectableMapping.getSelectionExpression(). If that isn't possible because the expression is too complex, a variable needs to be introduced which is then used instead of the original expression.

add

public static Expression add(Expression left,
 Expression right,
 SqmToSqlAstConverter converter)

multiply

public static Expression multiply(Expression left,
 int multiplier,
 BasicType<Integer> integerType)

multiply

public static Expression multiply(Expression left,
 Expression multiplier)