IsValue returns true if the Expr is a string, integral or value arg.

func NewUnionClause(t UnionType,l,r *Select,a bool)*UnionClause{.

reference: https://dev.mysql.com/doc/refman/8.0/en/all-subqueries.htmlsubquery with ANY,SOME,ALLoperand comparison_operator [ANY | SOME | ALL] (subquery).

if $format is jsonline.

Direction values.

&.

|.

^.

test.

alias for bzip2.

load data fotmat.

Direction values.

Direction values.

/.

=.

>.

>=.

alias of gzip.

Index hint scopes.

Index hint scopes.

Index hint scopes.

Index hint scopes.

IN.

.

the time or timestamp unit DAY.

the time unit DAY_MICROSECOND.

the time unit DAY_SECOND.

the time unit DAY_HOUR.

the time unit DAY_MINUTE.

the time or timestamp unit HOUR.

the time unit HOUR_MICROSECOND.

the time unit HOUR_MINUTE.

the time unit HOUR_SECOND.

an invalid time or timestamp unit.

the time or timestamp unit MICROSECOND.

the time or timestamp unit MINUTE.

the time unit MINUTE_MICROSECOND.

the time unit MINUTE_SECOND.

the time or timestamp unit MONTH.

the time or timestamp unit QUARTER.

the time or timestamp unit SECOND.

the time unit SECOND_MICROSECOND.

the time or timestamp unit WEEK.

the time or timestamp unit YEAR.

the time unit YEAR_MONTH.

load data fotmat.

<<.

<.

<=.

LIKE.

%.

<>, !=.

NOT IN.

NOT LIKE.

NOT REG_MATCH.

<=>.

if $format is jsonline.

(x,x).

db_name.

db_name.*.

db_name.tbl_name.

*.

*.*.

procedure.

tbl_name.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable dual password administration.

Enable audit log configuration.

Enable backup administration.

Enable binary log control.

Enable activation and deactivation of binary log encryption.

Enable clone administration.

Enable connection limit/restriction control.

Enable InnoDB key rotation.

Enable firewall rule administration, any user.

Exempt user from firewall restrictions.

Enable firewall rule administration, self.

Enable optimizer cost reloading.

Enable status indicator flushing.

Enable table flushing.

Enable user-resource flushing.

Enable Group Replication control.

Enable redo log archiving administration.

Enable or disable redo logging.

Enable sharing of user or role between SQL nodes (NDB Cluster).

Enable persisting read-only system variables.

Act as the PRIVILEGE_CHECKS_USER for a replication channel.

Enable regular replication control.

Enable resource group administration.

Enable resource group administration.

Enable roles to be granted or revoked, use of WITH ADMIN OPTION.

Enable setting restricted session system variables.

Enable setting non-self DEFINER values.

Enable access to stored routine definitions.

Designate account as system account.

Enable modifying or persisting global system variables.

Enable overriding default encryption settings.

Enable use of Version Tokens functions.

Enable XA RECOVER execution.

Grant all privileges at specified access level except GRANT OPTION and PROXY.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable stored routines to be altered or dropped.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable role creation.

Enable stored routine creation.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable tablespaces and log file groups to be created, altered, or dropped.

Enable use of CREATE TEMPORARY TABLE.

Enable use of CREATE USER, DROP USER, RENAME USER, and REVOKE ALL PRIVILEGES.

Enable views to be created or altered.

Enable use of DELETE.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable roles to be dropped.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable use of events for the Event Scheduler.

Enable the user to execute stored routines.

Enable the user to cause the server to read or write files.

Enable privileges to be granted to or removed from other accounts.

Enable indexes to be created or dropped.

Enable use of INSERT.

Enable use of LOCK TABLES on tables for which you have the SELECT privilege.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable the user to see all processes with SHOW PROCESSLIST.

Enable user proxying.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable foreign key creation.

Enable use of FLUSH operations.

Enable the user to ask where source or replica servers are.

Enable replicas to read binary log events from the source.

Enable use of SELECT.

Enable SHOW DATABASES to show all databases.

* From: https://dev.mysql.com/doc/refman/8.0/en/grant.html */.

Enable use of SHOW CREATE VIEW.

Enable use of mysqladmin shutdown.

Enable use of other administrative operations such as CHANGE REPLICATION SOURCE TO, CHANGE MASTER TO, KILL, PURGE BINARY LOGS, SET GLOBAL, and mysqladmin debug command.

Enable trigger operations.

Enable use of REPLACE.

Enable use of UPDATE.

Synonym for “no privileges”.

Enable use of VALUES.

QueryTypeDCL (Data Control Language) statement: Grant, Revoke CreateAccount, CreateUser, CreateRole, AlterAccount, AlterUser, DropAccount, DropUser, DropRole.

QueryTypeDDL (Data Definition Language): CreateDatabase, DropDatabase, DropTable, Create/Drop/Alter/Rename Database/Table/View/Index/Function, TruncateTable,.

QueryTypeDML (Data Manipulation Language): Insert, Update, Delete, Load.

QueryTypeDQL (Data Query Language) Select, MoDump, ValuesStatement, With.

QueryTypeOth (Other.) statement: AnalyzeStmt(Not Support), ExplainStmt, ExplainAnalyze, ExplainFor, SetVar, SetDefaultRole, SetRole, SetPassword, Declare, Do, TableFunction, Use, PrepareStmt, Execute, Deallocate, Kill Show ..., ShowCreateTable, ShowColumns(Desc).

QueryTypeTCL (Transaction Control Language): BeginTransaction, RollbackTransaction, CommitTransaction, Savepoint(Not Support).

Reference option.

Reference option.

Reference option.

Reference option.

Reference option.

Reference option.

REG_MATCH.

>>.

Select lock types.

Select lock types.

Select lock types.

Select lock types.

Select lock types.

Select lock types.

Select lock types.

Select lock types.

Low priority write locks.

TableLockNone means this table lock is absent.

TableLockRead means the session with this lock can read the table (but not write it).

The locks are the same as READ except that they allow INSERT commands to be executed.

TableLockWrite means only the session with this lock has write/read permission.

!.

-.

+.

~.

The alias, optionally with a column list: "AS name" or "AS name(col1, col2)".

the table expression coupled with an optional alias.

alter configuration for mo_mysql_compatibility_mode.

AlterTable see https://dev.mysql.com/doc/refman/8.0/en/alter-table.html.

Use statement.

and expression.

Begin statement.

Begin statement.

binary expression.

Case-When expression.

the Cast expression.

Commit statement.

Declare statement.

the DEFAULT expression.

Delete statement.

Do statement.

DROP Database statement.

DROP Table statement.

DropView DROP View statement.

EXPLAIN ANALYZE statement.

EXPLAIN FOR CONNECTION statement.

EXPLAIN stmt statement.

ast fir the list of expression.

FmtCtx contains formatted text of the node.

the FROM clause.

function call expression.

the INSERT statement.

for sql type.

INTERVAL / time unit.

is false expression.

is not false expression.

is not null expression.

is not true expression.

is not unknown expression.

is null expression.

is true expression.

is unknown expression.

the LIMIT clause.

Load data statement.

the NATURAL join condition.

not expression.

the AST for the constant numeric value.

the path prefix of an object name.

the ON condition for join.

the ordering expression.

or expression.

select a from t1 where a > ?.

the parenthesized expression.

the parenthesized SELECT/UNION/VALUES statement.

the parenthesized TableExpr.

the BETWEEN or a NOT BETWEEN expression.

the REPLACE statement.

function reference.

Rollback statement.

Select represents a SelectStatement with an ORDER and/or LIMIT.

SelectClause represents a SELECT statement.

a SELECT expression.

ShowBackendServers indicates SHOW BACKEND SERVERS statement.

SHOW collation statement.

show column number.

SHOW COLUMNS statement.

SHOW CREATE DATABASE statement.

SHOW CREATE TABLE statement.

SHOW CREATE VIEW statement.

the SHOW DATABASES statement.

show index statement.

show locks.

show node list.

SHOW PROCESSLIST.

SHOW SEQUENCES statement.

SHOW STATUS statement.

show table number.

SHOW TABLES statement.

show table values.

SHOW VARIABLES statement System Variables.

the statements as a data source includes the select statement.

StrVal represents a constant string value.

subquery.

sql type.

modes for a transaction.

truncate table statement.

the parenthesized list of expressions.

unary expression.

the UNION statement.

'*' in the scalar expression.

the unresolved qualified name like column name.

the unresolved qualified name for a database object (table, view, etc).

update statement.

the update expression.

Use statement.

the USING condition.

the VALUES clause.

ValuesStatement the VALUES Statement.

for variable = expr.

When sub-expression.

WHERE or HAVING clause.

xor expression.

column attribute.

the AST for literals like string,numeric,bool and etc.

AST for the expression.

the common interface to UnresolvedName and QualifiedFunctionName.

IdentifierName is referenced in the expression.

the join condition.

column element in load data column list.

Visitor Design Pattern NodeChecker is abstract tree Node.

NodeFormatter for formatted output of the node.

the common interface for qualified object names.

type reference.

subquery interface.

the table expression.

variable in the scalar expression.

Visitor Design Pattern Visitor visits the ast node or sub ast nodes.

AggType specifies the type of aggregation.

Binary Operator.

comparion operation.

Direction for ordering results.

a list of expression.

container holding list of arguments in udf.

a GROUP BY clause.

sql indentifier.

the list of identifiers.

IntervalType is the type for time and timestamp units.

in reference definition.

the path in an UnresolvedName.

OrderBy represents an ORDER BY clause.

container holding list of arguments in udf.

the read and write mode for a transaction.

SELECT expressions.

SelectLockType is the lock type for SelectStmt.

the list of table definitions.

the list of table expressions.

TableLockType is the type of the table lock.

table name array.

unary expression.

UnionType set operations.