JoinSourceSyntax (General SQL Parser Java Library Core 4.2.9 API)

Object
- Enum<JoinSourceSyntax>
- - gudusoft.gsqlparser.ir.semantic.joinanalysis.JoinSourceSyntax

All Implemented Interfaces:

Serializable, Comparable<JoinSourceSyntax>
```
public enum JoinSourceSyntax
extends Enum<JoinSourceSyntax>
```
How a JoinEntity was written in the source SQL. This provenance is independent of the semantic join type and determines how JoinEntity.getConditionText() should be interpreted.
- EXPLICIT — a keyword join (JOIN ... ON, LEFT JOIN, CROSS JOIN, NATURAL JOIN, USING (...)). Only an anchored ON expression supplies non-null condition text; USING, NATURAL, and condition-less keyword joins do not. An explicit lateral join with ON remains EXPLICIT and uses JoinEntity.isLateral() as the orthogonal lateral marker.
- COMMA — a comma-FROM cross product (FROM a, b). Condition text is always null, including after WHERE predicates promote the semantic join type and populate JoinEntity.getConditions().
- LATERAL — a lateral join: SQL Server CROSS APPLY / OUTER APPLY (and reserved for ANSI LATERAL / PostgreSQL lateral). The right operand is correlated to the left; the join carries no ON/USING (the correlation lives inside the right operand), so condition text is null. Pair with JoinEntity.isLateral().
- SEMI — a predicate-derived semi-join: an EXISTS / IN (or NOT EXISTS / NOT IN) subquery in a WHERE clause (R8), not a written FROM-clause join. Condition text is the complete verbatim predicate wrapper when it can be anchored. Pair with SemanticJoinType.SEMI / SemanticJoinType.ANTI_SEMI.
Introduced by join-analysis slice 162 (S1).

Enum Constant Summary

Enum Constants
Enum Constant and Description

COMMA

EXPLICIT

LATERAL

SEMI

Enum Constants
Enum Constant and Description
`COMMA`
`EXPLICIT`
`LATERAL`
`SEMI`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static JoinSourceSyntax`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static JoinSourceSyntax[]`	`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
  - EXPLICIT
```
public static final JoinSourceSyntax EXPLICIT
```
  - COMMA
```
public static final JoinSourceSyntax COMMA
```
  - LATERAL
```
public static final JoinSourceSyntax LATERAL
```
  - SEMI
```
public static final JoinSourceSyntax SEMI
```
- Method Detail
  - values
```
public static JoinSourceSyntax[] 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 (JoinSourceSyntax c : JoinSourceSyntax.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static JoinSourceSyntax 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 JoinSourceSyntax

Enum Constant Summary

Method Summary

Methods inherited from class Enum

Methods inherited from class Object

Enum Constant Detail

EXPLICIT

COMMA

LATERAL

SEMI

Method Detail

values

valueOf