Package org.apache.calcite.sql.type
Class AssignableOperandTypeChecker
- java.lang.Object
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- org.apache.calcite.sql.type.AssignableOperandTypeChecker
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- All Implemented Interfaces:
SqlOperandTypeChecker
public class AssignableOperandTypeChecker extends java.lang.Object implements SqlOperandTypeChecker
AssignableOperandTypeChecker implementsSqlOperandTypeChecker
by verifying that the type of each argument is assignable to a predefined set of parameter types (under the SQL definition of "assignable").
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Nested Class Summary
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Nested classes/interfaces inherited from interface org.apache.calcite.sql.type.SqlOperandTypeChecker
SqlOperandTypeChecker.Consistency
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Field Summary
Fields Modifier and Type Field Description private com.google.common.collect.ImmutableList<java.lang.String>
paramNames
private java.util.List<RelDataType>
paramTypes
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Constructor Summary
Constructors Constructor Description AssignableOperandTypeChecker(java.util.List<RelDataType> paramTypes, java.util.List<java.lang.String> paramNames)
Instantiates this strategy with a specific set of parameter types.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)
Checks the types of all operands to an operator call.java.lang.String
getAllowedSignatures(SqlOperator op, java.lang.String opName)
Returns a string describing the allowed formal signatures of a call, e.g.SqlOperandTypeChecker.Consistency
getConsistency()
Returns the strategy for making the arguments have consistency types.SqlOperandCountRange
getOperandCountRange()
boolean
isOptional(int i)
Returns whether thei
th operand is optional.
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Field Detail
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paramTypes
private final java.util.List<RelDataType> paramTypes
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paramNames
private final com.google.common.collect.ImmutableList<java.lang.String> paramNames
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Constructor Detail
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AssignableOperandTypeChecker
public AssignableOperandTypeChecker(java.util.List<RelDataType> paramTypes, java.util.List<java.lang.String> paramNames)
Instantiates this strategy with a specific set of parameter types.- Parameters:
paramTypes
- parameter types for operands; index in this array corresponds to operand numberparamNames
- parameter names, or null
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Method Detail
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isOptional
public boolean isOptional(int i)
Description copied from interface:SqlOperandTypeChecker
Returns whether thei
th operand is optional.- Specified by:
isOptional
in interfaceSqlOperandTypeChecker
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getOperandCountRange
public SqlOperandCountRange getOperandCountRange()
- Specified by:
getOperandCountRange
in interfaceSqlOperandTypeChecker
- Returns:
- range of operand counts allowed in a call
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checkOperandTypes
public boolean checkOperandTypes(SqlCallBinding callBinding, boolean throwOnFailure)
Description copied from interface:SqlOperandTypeChecker
Checks the types of all operands to an operator call.- Specified by:
checkOperandTypes
in interfaceSqlOperandTypeChecker
- Parameters:
callBinding
- description of the call to be checkedthrowOnFailure
- whether to throw an exception if check fails (otherwise returns false in that case)- Returns:
- whether check succeeded
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getAllowedSignatures
public java.lang.String getAllowedSignatures(SqlOperator op, java.lang.String opName)
Description copied from interface:SqlOperandTypeChecker
Returns a string describing the allowed formal signatures of a call, e.g. "SUBSTR(VARCHAR, INTEGER, INTEGER)".- Specified by:
getAllowedSignatures
in interfaceSqlOperandTypeChecker
- Parameters:
op
- the operator being checkedopName
- name to use for the operator in case of aliasing- Returns:
- generated string
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getConsistency
public SqlOperandTypeChecker.Consistency getConsistency()
Description copied from interface:SqlOperandTypeChecker
Returns the strategy for making the arguments have consistency types.- Specified by:
getConsistency
in interfaceSqlOperandTypeChecker
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