Package org.h2.expression.function
Class CurrentDateTimeValueFunction
java.lang.Object
org.h2.expression.Expression
org.h2.expression.Operation0
org.h2.expression.function.CurrentDateTimeValueFunction
- All Implemented Interfaces:
NamedExpression
,HasSQL
,Typed
Current datetime value function.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
The function "CURRENT_DATE"static final int
The function "CURRENT_TIME"static final int
The function "CURRENT_TIMESTAMP"private final int
static final int
The function "LOCALTIME"static final int
The function "LOCALTIMESTAMP"private static final String[]
private final int
private final TypeInfo
private static final int[]
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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
getCost()
Estimate the cost to process the expression.getName()
Get the name.static String
getName
(int function) Get the name for this function id.getType()
Returns the data type.getUnenclosedSQL
(StringBuilder builder, int sqlFlags) Get the SQL statement of this expression.getValue
(SessionLocal session) Return the resulting value for the current row.boolean
isEverything
(ExpressionVisitor visitor) Check if this expression and all sub-expressions can fulfill a criteria.Methods inherited from class org.h2.expression.Operation0
mapColumns, optimize, 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, getSubexpression, getSubexpressionCount, 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
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Field Details
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CURRENT_DATE
public static final int CURRENT_DATEThe function "CURRENT_DATE"- See Also:
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CURRENT_TIME
public static final int CURRENT_TIMEThe function "CURRENT_TIME"- See Also:
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LOCALTIME
public static final int LOCALTIMEThe function "LOCALTIME"- See Also:
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CURRENT_TIMESTAMP
public static final int CURRENT_TIMESTAMPThe function "CURRENT_TIMESTAMP"- See Also:
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LOCALTIMESTAMP
public static final int LOCALTIMESTAMPThe function "LOCALTIMESTAMP"- See Also:
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TYPES
private static final int[] TYPES -
NAMES
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function
private final int function -
scale
private final int scale -
type
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Constructor Details
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CurrentDateTimeValueFunction
public CurrentDateTimeValueFunction(int function, int scale)
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Method Details
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getName
Get the name for this function id.- Parameters:
function
- the function id- Returns:
- the name
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getValue
Description copied from class:Expression
Return the resulting value for the current row.- Specified by:
getValue
in classExpression
- Parameters:
session
- the session- Returns:
- the result
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getUnenclosedSQL
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 classExpression
- Parameters:
builder
- string buildersqlFlags
- formatting flags- Returns:
- the specified string builder
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isEverything
Description copied from class:Expression
Check if this expression and all sub-expressions can fulfill a criteria. If any part returns false, the result is false.- Specified by:
isEverything
in classExpression
- Parameters:
visitor
- the visitor- Returns:
- if the criteria can be fulfilled
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getType
Description copied from class:Expression
Returns the data type. The data type may be unknown before the optimization phase.- Specified by:
getType
in interfaceTyped
- Specified by:
getType
in classExpression
- Returns:
- the data type
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getCost
public int getCost()Description copied from class:Expression
Estimate the cost to process the expression. Used when optimizing the query, to calculate the query plan with the lowest estimated cost.- Specified by:
getCost
in classExpression
- Returns:
- the estimated cost
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getName
Description copied from interface:NamedExpression
Get the name.- Specified by:
getName
in interfaceNamedExpression
- Returns:
- the name in uppercase
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