infoschema

var (
	// ErrDatabaseDropExists returns for dropping a non-existent database.
	ErrDatabaseDropExists = terror.ClassSchema.New(codeDBDropExists, "Can't drop database '%s'; database doesn't exist")
	// ErrDatabaseNotExists returns for database not exists.
	ErrDatabaseNotExists = terror.ClassSchema.New(codeDatabaseNotExists, "Unknown database '%s'")
	// ErrTableNotExists returns for table not exists.
	ErrTableNotExists = terror.ClassSchema.New(codeTableNotExists, "Table '%s.%s' doesn't exist")
	// ErrColumnNotExists returns for column not exists.
	ErrColumnNotExists = terror.ClassSchema.New(codeColumnNotExists, "Unknown column '%s' in '%s'")
	// ErrForeignKeyNotMatch returns for foreign key not match.
	ErrForeignKeyNotMatch = terror.ClassSchema.New(codeWrongFkDef, "Incorrect foreign key definition for '%s': Key reference and table reference don't match")
	// ErrCannotAddForeign returns for foreign key exists.
	ErrCannotAddForeign = terror.ClassSchema.New(codeCannotAddForeign, "Cannot add foreign key constraint")
	// ErrForeignKeyNotExists returns for foreign key not exists.
	ErrForeignKeyNotExists = terror.ClassSchema.New(codeForeignKeyNotExists, "Can't DROP '%s'; check that column/key exists")
	// ErrDatabaseExists returns for database already exists.
	ErrDatabaseExists = terror.ClassSchema.New(codeDatabaseExists, "Can't create database '%s'; database exists")
	// ErrTableExists returns for table already exists.
	ErrTableExists = terror.ClassSchema.New(codeTableExists, "Table '%s' already exists")
	// ErrTableDropExists returns for dropping a non-existent table.
	ErrTableDropExists = terror.ClassSchema.New(codeBadTable, "Unknown table '%s'")
	// ErrColumnExists returns for column already exists.
	ErrColumnExists = terror.ClassSchema.New(codeColumnExists, "Duplicate column name '%s'")
	// ErrIndexExists returns for index already exists.
	ErrIndexExists = terror.ClassSchema.New(codeIndexExists, "Duplicate Index")
	// ErrKeyNameDuplicate returns for index duplicate when rename index.
	ErrKeyNameDuplicate = terror.ClassSchema.New(codeKeyNameDuplicate, "Duplicate key name '%s'")
	// ErrKeyNotExists returns for index not exists.
	ErrKeyNotExists = terror.ClassSchema.New(codeKeyNotExists, "Key '%s' doesn't exist in table '%s'")
	// ErrMultiplePriKey returns for multiple primary keys.
	ErrMultiplePriKey = terror.ClassSchema.New(codeMultiplePriKey, "Multiple primary key defined")
	// ErrTooManyKeyParts returns for too many key parts.
	ErrTooManyKeyParts = terror.ClassSchema.New(codeTooManyKeyParts, "Too many key parts specified; max %d parts allowed")
)

var TableStatsCacheExpiry = 3 * time.Second