Package org.h2.expression.function

Class JsonConstructorFunction

java.lang.Object

org.h2.expression.Expression

org.h2.expression.OperationN

org.h2.expression.function.JsonConstructorFunction

All Implemented Interfaces:

ExpressionWithFlags, ExpressionWithVariableParameters, NamedExpression, HasSQL, Typed

public final class JsonConstructorFunction
extends OperationN
implements ExpressionWithFlags, NamedExpression

JSON constructor function.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	array
private int	flags

Fields inherited from class org.h2.expression.OperationN

args, argsCount, type

Fields inherited from class org.h2.expression.Expression

AUTO_PARENTHESES, MAP_IN_AGGREGATE, MAP_IN_WINDOW, MAP_INITIAL, WITH_PARENTHESES, WITHOUT_PARENTHESES

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Constructor	Description
JsonConstructorFunction(boolean array)	Creates a new instance of JSON constructor function.

Method Summary

Modifier and Type	Method	Description
int	getFlags()	Returns the flags.
static java.lang.StringBuilder	getJsonFunctionFlagsSQL(java.lang.StringBuilder builder, int flags, boolean forArray)	Appends flags of a JSON function to the specified string builder.
java.lang.String	getName()	Get the name.
java.lang.StringBuilder	getUnenclosedSQL(java.lang.StringBuilder builder, int sqlFlags)	Get the SQL statement of this expression.
Value	getValue(SessionLocal session)	Return the resulting value for the current row.
private Value	jsonArray(SessionLocal session, Expression[] args)
private Value	jsonObject(SessionLocal session, Expression[] args)
Expression	optimize(SessionLocal session)	Try to optimize the expression.
void	setFlags(int flags)	Set the flags for this expression.

Methods inherited from class org.h2.expression.OperationN

addParameter, doneWithParameters, getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, optimizeArguments, setEvaluatable, updateAggregate

Methods inherited from class org.h2.expression.Expression

addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnName, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getNullable, getSchemaName, getSQL, getSQL, getSQL, getSQL, getTableAlias, getTableName, getWhenSQL, getWhenValue, isConstant, isIdentity, isNullConstant, isValueSet, isWhenConditionOperand, needParentheses, optimizeCondition, toString, writeExpressions, writeExpressions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Field Detail

array

private final boolean array

flags

private int flags

Constructor Detail

JsonConstructorFunction

public JsonConstructorFunction(boolean array)

Creates a new instance of JSON constructor function.

Parameters:

array - false for JSON_OBJECT, true for JSON_ARRAY.

Method Detail

setFlags

public void setFlags(int flags)

Description copied from interface: ExpressionWithFlags

Set the flags for this expression.

Specified by:

setFlags in interface ExpressionWithFlags

Parameters:

flags - the flags to set

getFlags

public int getFlags()

Description copied from interface: ExpressionWithFlags

Returns the flags.

Specified by:

getFlags in interface ExpressionWithFlags

Returns:

the flags

getValue

public Value getValue(SessionLocal session)

Description copied from class: Expression

Return the resulting value for the current row.

Specified by:

getValue in class Expression

Parameters:

session - the session

Returns:

the result

jsonObject

private Value jsonObject(SessionLocal session,
                         Expression[] args)

jsonArray

private Value jsonArray(SessionLocal session,
                        Expression[] args)

optimize

public Expression optimize(SessionLocal session)

Description copied from class: Expression

Try to optimize the expression.

Specified by:

optimize in class Expression

Parameters:

session - the session

Returns:

the optimized expression

getUnenclosedSQL

public java.lang.StringBuilder getUnenclosedSQL(java.lang.StringBuilder builder,
                                                int sqlFlags)

Description copied from class: Expression

Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.

Specified by:

getUnenclosedSQL in class Expression

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getJsonFunctionFlagsSQL

public static java.lang.StringBuilder getJsonFunctionFlagsSQL(java.lang.StringBuilder builder,
                                                              int flags,
                                                              boolean forArray)

Appends flags of a JSON function to the specified string builder.

Parameters:

builder - string builder to append to

flags - flags to append

forArray - whether the function is an array function

Returns:

the specified string builder

getName

public java.lang.String getName()

Description copied from interface: NamedExpression

Get the name.

Specified by:

getName in interface NamedExpression

Returns:

the name in uppercase