Package org.h2.expression
Class Format
java.lang.Object
org.h2.expression.Expression
org.h2.expression.Operation1
org.h2.expression.Format
A format clause such as FORMAT JSON.
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Nested Class Summary
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Field Summary
FieldsFields inherited from class org.h2.expression.Operation1
arg, 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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetColumnName
(SessionLocal session, int columnIndex) Get the column name or alias name of this expression.int
Check whether this expression is a column and can store NULL.Get the table name, or nullgetUnenclosedSQL
(StringBuilder builder, int sqlFlags) Get the SQL statement of this expression.getValue
(SessionLocal session) Return the resulting value for the current row.Returns the value with applied format.boolean
Check if this is an identity column.optimize
(SessionLocal session) Try to optimize the expression.Methods inherited from class org.h2.expression.Operation1
getCost, getSubexpression, getSubexpressionCount, getType, isEverything, mapColumns, setEvaluatable, updateAggregate
Methods inherited from class org.h2.expression.Expression
addFilterConditions, createIndexConditions, getAlias, getBooleanValue, getColumnNameForView, getEnclosedSQL, getNonAliasExpression, getNotIfPossible, getSchemaName, getSQL, getSQL, getSQL, getSQL, getTableAlias, getWhenSQL, getWhenValue, isConstant, 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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format
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Constructor Details
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Format
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Method Details
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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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getValue
Returns the value with applied format.- Parameters:
value
- the value- Returns:
- the value with applied format
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optimize
Description copied from class:Expression
Try to optimize the expression.- Specified by:
optimize
in classExpression
- Parameters:
session
- the session- Returns:
- the optimized expression
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isIdentity
public boolean isIdentity()Description copied from class:Expression
Check if this is an identity column.- Overrides:
isIdentity
in classExpression
- Returns:
- true if it is an identity column
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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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getNullable
public int getNullable()Description copied from class:Expression
Check whether this expression is a column and can store NULL.- Overrides:
getNullable
in classExpression
- Returns:
- whether NULL is allowed
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getTableName
Description copied from class:Expression
Get the table name, or null- Overrides:
getTableName
in classExpression
- Returns:
- the table name
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getColumnName
Description copied from class:Expression
Get the column name or alias name of this expression.- Overrides:
getColumnName
in classExpression
- Parameters:
session
- the sessioncolumnIndex
- 0-based column index- Returns:
- the column name
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