EvidenceType (General SQL Parser Java Library Core 4.1.0.5 API)

Object
- Enum<EvidenceType>
- - gudusoft.gsqlparser.resolver2.inference.EvidenceType

All Implemented Interfaces:

Serializable, Comparable<EvidenceType>
```
public enum EvidenceType
extends Enum<EvidenceType>
```
Types of evidence for column inference.
Different evidence types have different confidence levels: - QUALIFIED_REFERENCE: Highest confidence (0.95) - explicit table.column - JOIN_CONDITION: Very high (0.9) - explicit relationship - INSERT_COLUMN_LIST: Perfect (1.0) - explicit column definition - SELECT_LIST: High (0.85) - direct column usage - UPDATE_SET: Very high (0.95) - explicit assignment - UNQUALIFIED_REFERENCE: Variable (0.5-0.8) - depends on context - INFERRED_FROM_USAGE: Lower (0.3-0.7) - pattern-based - METADATA: Perfect (1.0) - from database schema

Enum Constant Summary

Enum Constants
Enum Constant and Description
`CTE_COLUMN_LIST` Column from CTE definition.
`INFERRED_FROM_USAGE` Column inferred from usage patterns.
`INSERT_COLUMN_LIST` Column appears in INSERT column list.
`JOIN_CONDITION` Column appears in JOIN condition.
`METADATA` Column from database metadata.
`QUALIFIED_REFERENCE` Column referenced with table qualifier.
`SELECT_LIST` Column appears in SELECT list.
`SUBQUERY_RESULT` Column inferred from subquery result.
`UNQUALIFIED_REFERENCE` Column referenced without table qualifier.
`UPDATE_SET` Column appears in UPDATE SET clause.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static EvidenceType`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static EvidenceType[]`	`values()` Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - QUALIFIED_REFERENCE
```
public static final EvidenceType QUALIFIED_REFERENCE
```
    Column referenced with table qualifier. Example: t1.id in "WHERE t1.id = 100"
  - UNQUALIFIED_REFERENCE
```
public static final EvidenceType UNQUALIFIED_REFERENCE
```
    Column referenced without table qualifier. Example: id in "WHERE id = 100"
  - JOIN_CONDITION
```
public static final EvidenceType JOIN_CONDITION
```
    Column appears in JOIN condition. Example: t1.id in "JOIN t2 ON t1.id = t2.t1_id"
  - SELECT_LIST
```
public static final EvidenceType SELECT_LIST
```
    Column appears in SELECT list. Example: name in "SELECT t1.name FROM t1"
  - INSERT_COLUMN_LIST
```
public static final EvidenceType INSERT_COLUMN_LIST
```
    Column appears in INSERT column list. Example: id, name in "INSERT INTO t1 (id, name) VALUES (...)"
  - UPDATE_SET
```
public static final EvidenceType UPDATE_SET
```
    Column appears in UPDATE SET clause. Example: name in "UPDATE t1 SET name = 'value'"
  - INFERRED_FROM_USAGE
```
public static final EvidenceType INFERRED_FROM_USAGE
```
    Column inferred from usage patterns. Example: Inferring columns from SELECT * based on WHERE clause usage
  - METADATA
```
public static final EvidenceType METADATA
```
    Column from database metadata. Example: Schema information from SQLEnv
  - SUBQUERY_RESULT
```
public static final EvidenceType SUBQUERY_RESULT
```
    Column inferred from subquery result. Example: Columns propagated from inner SELECT
  - CTE_COLUMN_LIST
```
public static final EvidenceType CTE_COLUMN_LIST
```
    Column from CTE definition. Example: Columns in WITH cte(c1, c2) AS (...)
- Method Detail
  - values
```
public static EvidenceType[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (EvidenceType c : EvidenceType.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static EvidenceType valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null

Enum EvidenceType

Enum Constant Summary

Method Summary

Methods inherited from class Enum

Methods inherited from class Object

Enum Constant Detail

QUALIFIED_REFERENCE

UNQUALIFIED_REFERENCE

JOIN_CONDITION

SELECT_LIST

INSERT_COLUMN_LIST

UPDATE_SET

INFERRED_FROM_USAGE

METADATA

SUBQUERY_RESULT

CTE_COLUMN_LIST

Method Detail

values

valueOf