gudusoft.gsqlparser.sqlenv

Enum IdentifierRules.CaseCompare

Object

Enum<IdentifierRules.CaseCompare>

gudusoft.gsqlparser.sqlenv.IdentifierRules.CaseCompare

All Implemented Interfaces:

Serializable, Comparable<IdentifierRules.CaseCompare>

Enclosing class:

IdentifierRules

public static enum IdentifierRules.CaseCompare
extends Enum<IdentifierRules.CaseCompare>

大小写比较规则（Case Comparison）

决定如何比较两个标识符是否相等

Enum Constant Summary

Enum Constants

Enum Constant and Description
COLLATION_BASED 基于 collation（运行时决定）
INSENSITIVE 大小写不敏感
SAME_AS_UNQUOTED 与 unquoted 规则一致
SENSITIVE 大小写敏感

Method Summary

Modifier and Type	Method and Description
static IdentifierRules.CaseCompare	valueOf(String name) Returns the enum constant of this type with the specified name.
static IdentifierRules.CaseCompare[]	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

SENSITIVE

public static final IdentifierRules.CaseCompare SENSITIVE

大小写敏感

例如：Couchbase 所有标识符, 所有 quoted identifiers

INSENSITIVE

public static final IdentifierRules.CaseCompare INSENSITIVE

大小写不敏感

例如：Oracle unquoted, MySQL unquoted

COLLATION_BASED

public static final IdentifierRules.CaseCompare COLLATION_BASED

基于 collation（运行时决定）

例如：SQL Server, Azure SQL

需要使用 Collator 进行比较

SAME_AS_UNQUOTED

public static final IdentifierRules.CaseCompare SAME_AS_UNQUOTED

与 unquoted 规则一致

例如：Presto quoted identifiers, Vertica quoted identifiers

在解析时需要回退到 unquotedCompare

Method Detail

values

public static IdentifierRules.CaseCompare[] 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 (IdentifierRules.CaseCompare c : IdentifierRules.CaseCompare.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static IdentifierRules.CaseCompare 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