ErrCode represents a specific error type in a error class. Same error code can be used in different error classes.

AdminStmt is the struct for Admin statement.

AdminStmtType is the type for admin statement.

AggFunctionMode stands for the aggregation function's mode.

AggregateFuncExpr represents aggregate function expression.

AggregateFuncExtractor visits Expr tree. It converts ColunmNameExpr to AggregateFuncExpr and collects AggregateFuncExpr.

Aggregation represents an aggregate plan.

AggregationFunction stands for aggregate functions.

AggregationType stands for the mode of aggregation plan.

AlterTableSpec represents alter table specification.

AlterTableStmt is a statement to change the structure of a table. See https://dev.mysql.com/doc/refman/5.7/en/alter-table.html

AlterTableType is the type for AlterTableSpec.

AlterUserStmt modifies user account. See https://dev.mysql.com/doc/refman/5.7/en/alter-user.html

AnalyzeTableStmt is used to create table statistics.

Apply gets one row from outer executor and gets one row from inner executor according to outer row.

ApplyConditionChecker checks whether all or any output of apply matches a condition.

Assignment is the expression for assignment, like a = 1.

Assignment represents a set assignment in Update, such as Update t set c1 = hex(12), c2 = c3 where c2 = 1

AuthOption is used for parsing create use statement.

BeginStmt is a statement to start a new transaction. See https://dev.mysql.com/doc/refman/5.7/en/commit.html

BetweenExpr is for "between and" or "not between and" expression.

BinaryOperationExpr is for binary operation like `1 + 1`, `1 - 1`, etc.

BinlogStmt is an internal-use statement. We just parse and ignore it. See http://dev.mysql.com/doc/refman/5.7/en/binlog.html

Bit is for mysql bit type.

Builder builds a new FileSorter.

BuiltinFunc is the function signature for builtin functions

ByItem represents an item in order by or group by.

ByItems wraps a "by" item.

CIStr is case insensitive string.

Cache plan is a physical plan which stores the result of its child node.

CaseExpr is the case expression.

CastFunctionType is the type for cast function.

Charset is a charset. Now we only support MySQL.

CharsetOpt is used for parsing charset option from SQL.

CheckTable is used for checking table data, built from the 'admin check table' statement.

Checker stores existing keys and checks if given data is distinct.

ColDesc describes column information like MySQL desc and show columns do.

Collation is a collation. Now we only support MySQL.

Column represents a column.

Column provides meta data describing a table column.

ColumnDef is used for parsing column definition from SQL.

ColumnInfo provides meta data describing of a table column.

ColumnName represents column name.

ColumnNameExpr represents a column name expression.

ColumnOption is used for parsing column constraint info from SQL.

ColumnOptionType is the type for ColumnOption.

ColumnPosition represent the position of the newly added column

ColumnPositionType is the type for ColumnPosition.

CommitStmt is a statement to commit the current transaction. See https://dev.mysql.com/doc/refman/5.7/en/commit.html

CompareSubqueryExpr is the expression for "expr cmp (select ...)". See https://dev.mysql.com/doc/refman/5.7/en/comparisons-using-subqueries.html See h

please upgrade the proto package

Constant stands for a constant value.

Constraint is constraint for table definition.

ConstraintType is the type for Constraint.

Context is an interface for transaction and executive args environment.

CorrelatedColumn stands for a column in a correlated sub query.

CreateDatabaseStmt is a statement to create a database. See https://dev.mysql.com/doc/refman/5.7/en/create-database.html

CreateIndexStmt is a statement to create an index. See https://dev.mysql.com/doc/refman/5.7/en/create-index.html

CreateTableStmt is a statement to create a table. See https://dev.mysql.com/doc/refman/5.7/en/create-table.html

CreateUserStmt creates user account. See https://dev.mysql.com/doc/refman/5.7/en/create-user.html

DBInfo provides meta data describing a DB.

DDL represents a DDL statement plan.

DDLNode represents DDL statement node.

DMLNode represents DML statement node.

DataSource represents a tablescan without condition push down.