SqlVisitor (Apache Calcite API)

Type Parameters:

R - Return type

All Known Implementing Classes:

AggChecker, AggFinder, AggFinder.AggIterable, AggVisitor, SqlBasicVisitor, SqlBetweenOperator.AndFinder, SqlScopedShuttle, SqlShuttle, SqlToRelConverter.AggConverter, SqlToRelConverter.AggregateFinder, SqlToRelConverter.Blackboard, SqlUtil.Genealogist, SqlValidatorImpl.DeriveTypeVisitor, SqlValidatorImpl.Expander, SqlValidatorImpl.ExtendedExpander, SqlValidatorImpl.NavigationExpander, SqlValidatorImpl.NavigationModifier, SqlValidatorImpl.NavigationReplacer, SqlValidatorImpl.OrderExpressionExpander, SqlValidatorImpl.PatternValidator, SqlValidatorImpl.PatternVarVisitor, SqlValidatorUtil.DeepCopier, Util.OverFinder
```
public interface SqlVisitor<R>
```
Visitor class, follows the visitor pattern.
The type parameter R is the return type of each visit() method. If the methods do not need to return a value, use Void.

See Also:

SqlBasicVisitor, SqlNode.accept(SqlVisitor), SqlOperator.acceptCall(org.apache.calcite.sql.util.SqlVisitor<R>, org.apache.calcite.sql.SqlCall)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`R`	`visit(SqlCall call)`	Visits a call to a `SqlOperator`.
`R`	`visit(SqlDataTypeSpec type)`	Visits a datatype specification.
`R`	`visit(SqlDynamicParam param)`	Visits a dynamic parameter.
`R`	`visit(SqlIdentifier id)`	Visits an identifier.
`R`	`visit(SqlIntervalQualifier intervalQualifier)`	Visits an interval qualifier
`R`	`visit(SqlLiteral literal)`	Visits a literal.
`R`	`visit(SqlNodeList nodeList)`	Visits a list of `SqlNode` objects.

- Method Detail
  - visit
```
R visit(SqlLiteral literal)
```
    Visits a literal.
    
    Parameters:
    
    literal - Literal
    
    See Also:
    
    SqlLiteral.accept(SqlVisitor)
  - visit
```
R visit(SqlCall call)
```
    Visits a call to a SqlOperator.
    
    Parameters:
    
    call - Call
    
    See Also:
    
    SqlCall.accept(SqlVisitor)
  - visit
```
R visit(SqlNodeList nodeList)
```
    Visits a list of SqlNode objects.
    
    Parameters:
    
    nodeList - list of nodes
    
    See Also:
    
    SqlNodeList.accept(SqlVisitor)
  - visit
```
R visit(SqlIdentifier id)
```
    Visits an identifier.
    
    Parameters:
    
    id - identifier
    
    See Also:
    
    SqlIdentifier.accept(SqlVisitor)
  - visit
```
R visit(SqlDataTypeSpec type)
```
    Visits a datatype specification.
    
    Parameters:
    
    type - datatype specification
    
    See Also:
    
    SqlDataTypeSpec.accept(SqlVisitor)
  - visit
```
R visit(SqlDynamicParam param)
```
    Visits a dynamic parameter.
    
    Parameters:
    
    param - Dynamic parameter
    
    See Also:
    
    SqlDynamicParam.accept(SqlVisitor)
  - visit
```
R visit(SqlIntervalQualifier intervalQualifier)
```
    Visits an interval qualifier
    
    Parameters:
    
    intervalQualifier - Interval qualifier
    
    See Also:
    
    SqlIntervalQualifier.accept(SqlVisitor)