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structured.proto
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// Copyright 2015 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
// Cannot be proto3 because we use nullable primitives.
syntax = "proto2";
package cockroach.sql.sqlbase;
option go_package = "sqlbase";
import "util/hlc/timestamp.proto";
import "sql/sqlbase/privilege.proto";
import "gogoproto/gogo.proto";
enum ConstraintValidity {
// The constraint is valid for all rows.
Validated = 0;
// The constraint has not yet been validated for all rows (and will not be
// validated until VALIDATE CONSTRAINT is used).
Unvalidated = 1;
// The constraint was just added, but the validation for existing rows is not
// yet complete. If validation fails, the constraint will be dropped.
Validating = 2;
// The constraint is being dropped in the schema changer.
Dropping = 3;
}
message ForeignKeyReference {
option (gogoproto.equal) = true;
enum Action {
option (gogoproto.goproto_enum_stringer) = false;
NO_ACTION = 0;
RESTRICT = 1;
SET_NULL = 2;
SET_DEFAULT = 3;
CASCADE = 4;
}
// Match is the algorithm used to compare composite keys.
enum Match {
option (gogoproto.goproto_enum_stringer) = false;
SIMPLE = 0;
FULL = 1;
PARTIAL = 2; // Note: not actually supported, but we reserve the value for future use.
}
optional uint32 table = 1 [(gogoproto.nullable) = false, (gogoproto.casttype) = "ID"];
optional uint32 index = 2 [(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexID"];
optional string name = 3 [(gogoproto.nullable) = false];
optional ConstraintValidity validity = 4 [(gogoproto.nullable) = false];
// If this FK only uses a prefix of the columns in its index, we record how
// many to avoid spuriously counting the additional cols as used by this FK.
optional int32 shared_prefix_len = 5 [(gogoproto.nullable) = false];
optional Action on_delete = 6 [(gogoproto.nullable) = false];
optional Action on_update = 7 [(gogoproto.nullable) = false];
// This is only important for composite keys. For all prior matches before
// the addition of this value, MATCH SIMPLE will be used.
optional Match match = 8 [(gogoproto.nullable) = false];
}
// ForeignKeyConstraint is the new (as of 19.2 and VersionTopLevelForeignKeys)
// representation for foreign keys. It's stored on the TableDescriptor and is
// designed to be agnostic to which indexes are available on both the origin
// and referenced tables, so that the optimizer can have full freedom to choose
// the best possible index to satisfy constraint checks at runtime.
message ForeignKeyConstraint {
option (gogoproto.equal) = true;
optional uint32 origin_table_id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "OriginTableID",
(gogoproto.casttype) = "ID"];
repeated uint32 origin_column_ids = 2 [(gogoproto.customname) = "OriginColumnIDs",
(gogoproto.casttype) = "ColumnID"];
repeated uint32 referenced_column_ids = 3 [(gogoproto.customname) = "ReferencedColumnIDs",
(gogoproto.casttype) = "ColumnID"];
optional uint32 referenced_table_id = 4 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ReferencedTableID",
(gogoproto.casttype) = "ID"];
optional string name = 5 [(gogoproto.nullable) = false];
optional ConstraintValidity validity = 6 [(gogoproto.nullable) = false];
optional ForeignKeyReference.Action on_delete = 7 [(gogoproto.nullable) = false];
optional ForeignKeyReference.Action on_update = 8 [(gogoproto.nullable) = false];
// This is only important for composite keys. For all prior matches before
// the addition of this value, MATCH SIMPLE will be used.
optional ForeignKeyReference.Match match = 9 [(gogoproto.nullable) = false];
// LegacyOriginIndex is the ID of the index used for the FK on the origin
// table. In versions 19.1 and earlier, foreign keys were represented by
// fields on the index that they use. In versions 19.2 and later, we preserve
// the semantics of the older FKs which were tied to indexes by specifying
// the index as a field on this proto, since the migration process to have
// top-level FK fields on the table descriptor requires two releases.
// In 20.1, these fields are no longer read, but must continue to be written
// to maintain compatibility in mixed 19.2/20.1 clusters. In 20.2 these fields
// can _finally_ be removed.
// * When using the foreign key constraint, do not read from these fields! *
optional uint32 legacy_origin_index = 10
[(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexID", deprecated = true];
// LegacyReferencedIndex is the ID of the index used for the FK on the
// referenced side. See the comment for LegacyOriginIndex.
optional uint32 legacy_referenced_index = 11
[(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexID", deprecated = true];
// These fields were used for the 19.1 -> 19.2 foreign key migration.
reserved 12, 13;
}
message ColumnDescriptor {
option (gogoproto.equal) = true;
optional string name = 1 [(gogoproto.nullable) = false];
optional uint32 id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ID", (gogoproto.casttype) = "ColumnID"];
optional bytes type = 3 [(gogoproto.nullable) = false, (gogoproto.customtype) = "github.com/cockroachdb/cockroach/pkg/sql/types.T"];
optional bool nullable = 4 [(gogoproto.nullable) = false];
reserved 8;
// Default expression to use to populate the column on insert if no
// value is provided.
optional string default_expr = 5;
reserved 9;
optional bool hidden = 6 [(gogoproto.nullable) = false];
reserved 7;
// Ids of sequences used in this column's DEFAULT expression, in calls to nextval().
repeated uint32 uses_sequence_ids = 10 [(gogoproto.casttype) = "ID"];
// Ids of sequences that the column owns.
repeated uint32 owns_sequence_ids = 12 [(gogoproto.casttype) = "ID"];
// Expression to use to compute the value of this column if this is a
// computed column.
optional string compute_expr = 11;
// LogicalColumnID is used to order columns visually. This is because
// ordinal_position in information_schema determines a table's visual column
// ordering to the user.
// This only differs from ID when the Column order is swapped or
// the ColumnDescriptor must be remade while remaining visual ordering.
// This does not exist in TableDescriptors pre 20.2.
optional uint32 logical_id = 13 [(gogoproto.nullable) = false,
(gogoproto.customname) = "LogicalColumnID", (gogoproto.casttype) = "ColumnID"];
}
// ColumnFamilyDescriptor is set of columns stored together in one kv entry.
// For more information, look at `docs/tech-notes/encoding.md#value-encoding`.
message ColumnFamilyDescriptor {
option (gogoproto.equal) = true;
optional string name = 1 [(gogoproto.nullable) = false];
// Column family 0 is *always* included in k/v pairs for a row. This makes
// sure that rows will all NULL values still have a k/v pair. When performing
// optimizations involving column families, ensure that column family 0
// is scanned if the row may have nulls.
optional uint32 id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ID", (gogoproto.casttype) = "FamilyID"];
// A list of column names of which the family is comprised. This list
// parallels the column_ids list. If duplicating the storage of the column
// names here proves to be prohibitive, we could clear this field before
// saving and reconstruct it after loading.
repeated string column_names = 3;
// A list of column ids of which the family is comprised. This list parallels
// the column_names list.
repeated uint32 column_ids = 4 [(gogoproto.customname) = "ColumnIDs",
(gogoproto.casttype) = "ColumnID"];
// If nonzero, the column involved in the single column optimization.
//
// Families store columns in a ValueType_TUPLE as repeated <columnID><data>
// entries. As a space optimization and for backward compatibility, a single
// column is written without the column id prefix. Because more columns could
// be added, it would be ambiguous which column was stored when read back in,
// so this field supplies it.
optional uint32 default_column_id = 5 [(gogoproto.nullable) = false,
(gogoproto.customname) = "DefaultColumnID", (gogoproto.casttype) = "ColumnID"];
}
// InterleaveDescriptor represents an index (either primary or secondary) that
// is interleaved into another table's data.
//
// Example:
// Table 1 -> /a/b
// Table 2 -> /a/b/c
// Table 3 -> /a/b/c/d
//
// There are two components (table 2 is the parent and table 1 is the
// grandparent) with shared lengths 2 and 1.
message InterleaveDescriptor {
option (gogoproto.equal) = true;
message Ancestor {
option (gogoproto.equal) = true;
// TableID is the ID of the table being interleaved into.
optional uint32 table_id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "TableID", (gogoproto.casttype) = "ID"];
// IndexID is the ID of the parent index being interleaved into.
optional uint32 index_id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "IndexID", (gogoproto.casttype) = "IndexID"];
// SharedPrefixLen is how many fields are shared between a parent and child
// being interleaved, excluding any fields shared between parent and
// grandparent. Thus, the sum of SharedPrefixLens in the components of an
// InterleaveDescriptor is never more than the number of fields in the index
// being interleaved.
// In cockroach 1.0, this value did not exist and thus a check for > 0
// must be performed prior to its use.
optional uint32 shared_prefix_len = 3 [(gogoproto.nullable) = false,
(gogoproto.customname) = "SharedPrefixLen"];
}
// Ancestors contains the nesting of interleaves in the order they appear in
// an encoded key. This means they are always in the far-to-near ancestor
// order (e.g. grand-grand-parent, grand-parent, parent).
repeated Ancestor ancestors = 1 [(gogoproto.nullable) = false];
}
// ShardedDescriptor represents an index (either primary or secondary) that is hash
// sharded into a user-specified number of buckets.
//
// As as example, sample field values for the following table:
//
// CREATE TABLE abc (
// a INT PRIMARY KEY USING HASH WITH BUCKET_COUNT=10, // column id: 1
// b BYTES
// );
//
// Sharded descriptor:
// name: "a_shard"
// shard_buckets: 10
// column_names: ["a"]
message ShardedDescriptor {
option (gogoproto.equal) = true;
// IsSharded indicates whether the index in question is a sharded one.
optional bool is_sharded = 1 [(gogoproto.nullable) = false];
// Name is the name of the shard column.
optional string name = 2 [(gogoproto.nullable) = false];
// ShardBuckets indicates the number of shards this index is divided into.
optional int32 shard_buckets = 3 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ShardBuckets"];
// ColumnNames lists the names of the columns used to compute the shard column's
// values.
repeated string column_names = 4;
}
// PartitioningDescriptor represents the partitioning of an index into spans
// of keys addressable by a zone config. The key encoding is unchanged. Each
// partition may optionally be itself divided into further partitions, called
// subpartitions.
message PartitioningDescriptor {
option (gogoproto.equal) = true;
// List represents a list partitioning, which maps individual tuples to
// partitions.
message List {
option (gogoproto.equal) = true;
// Name is the partition name.
optional string name = 1 [(gogoproto.nullable) = false];
// Values is an unordered set of the tuples included in this partition. Each
// tuple is encoded with the EncDatum value encoding. DEFAULT is encoded as
// NOT NULL followed by PartitionDefaultVal encoded as a non-sorting
// uvarint.
repeated bytes values = 2;
// Subpartitioning represents a further partitioning of this list partition.
optional PartitioningDescriptor subpartitioning = 3 [(gogoproto.nullable) = false];
}
// Range represents a range partitioning, which maps ranges of tuples to
// partitions by specifying exclusive upper bounds. The range partitions in a
// PartitioningDescriptor are required to be sorted by UpperBound.
message Range {
option (gogoproto.equal) = true;
// Name is the partition name.
optional string name = 1 [(gogoproto.nullable) = false];
// FromInclusive is the inclusive lower bound of this range partition. It is
// encoded with the EncDatum value encoding. MINVALUE and MAXVALUE are
// encoded as NOT NULL followed by a PartitionSpecialValCode encoded as a
// non-sorting uvarint.
optional bytes from_inclusive = 3;
// ToExclusive is the exclusive upper bound of this range partition. It is
// encoded in the same way as From.
optional bytes to_exclusive = 2;
}
// NumColumns is how large of a prefix of the columns in an index are used in
// the function mapping column values to partitions. If this is a
// subpartition, this is offset to start from the end of the parent
// partition's columns. If NumColumns is 0, then there is no partitioning.
optional uint32 num_columns = 1 [(gogoproto.nullable) = false];
// Exactly one of List or Range is required to be non-empty if NumColumns is
// non-zero.
repeated List list = 2 [(gogoproto.nullable) = false];
repeated Range range = 3 [(gogoproto.nullable) = false];
}
// IndexDescriptor describes an index (primary or secondary).
//
// Sample field values on the following table:
//
// CREATE TABLE t (
// k1 INT NOT NULL, // column ID: 1
// k2 INT NOT NULL, // column ID: 2
// u INT NULL, // column ID: 3
// v INT NULL, // column ID: 4
// w INT NULL, // column ID: 5
// CONSTRAINT "primary" PRIMARY KEY (k1, k2),
// INDEX k1v (k1, v) STORING (w),
// FAMILY "primary" (k1, k2, u, v, w)
// )
//
// Primary index:
// name: primary
// id: 1
// unique: true
// column_names: k1, k2
// column_directions: ASC, ASC
// column_ids: 1, 2 // k1, k2
//
// [old STORING encoding] Index k1v (k1, v) STORING (w):
// name: k1v
// id: 2
// unique: false
// column_names: k1, v
// column_directions: ASC, ASC
// store_column_names: w
// column_ids: 1, 4 // k1, v
// extra_column_ids: 2, 5 // k2, w
//
// [new STORING encoding] Index k1v (k1, v) STORING (w):
// name: k1v
// id: 2
// unique: false
// column_names: k1, v
// column_directions: ASC, ASC
// store_column_names: w
// column_ids: 1, 4 // k1, v
// extra_column_ids: 2 // k2
// store_column_ids: 5 // w
message IndexDescriptor {
option (gogoproto.equal) = true;
// The direction of a column in the index.
enum Direction {
ASC = 0;
DESC = 1;
}
// The type of the index.
enum Type {
FORWARD = 0;
INVERTED = 1;
}
optional string name = 1 [(gogoproto.nullable) = false];
optional uint32 id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ID", (gogoproto.casttype) = "IndexID"];
optional bool unique = 3 [(gogoproto.nullable) = false];
optional uint32 version = 18 [(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexDescriptorVersion"];
// An ordered list of column names of which the index is comprised; these
// columns do not include any additional stored columns (which are in
// stored_column_names). This list parallels the column_ids list.
//
// Note: if duplicating the storage of the column names here proves to be
// prohibitive, we could clear this field before saving and reconstruct it
// after loading.
repeated string column_names = 4;
// The sort direction of each column in column_names.
repeated Direction column_directions = 8;
// An ordered list of column names which the index stores in addition to the
// columns which are explicitly part of the index (STORING clause). Only used
// for secondary indexes.
repeated string store_column_names = 5;
// An ordered list of column IDs of which the index is comprised. This list
// parallels the column_names list and does not include any additional stored
// columns.
repeated uint32 column_ids = 6 [(gogoproto.customname) = "ColumnIDs",
(gogoproto.casttype) = "ColumnID"];
// An ordered list of IDs for the additional columns associated with the
// index:
// - implicit columns, which are all the primary key columns that are not
// already part of the index (i.e. PrimaryIndex.column_ids - column_ids).
// - stored columns (the columns in store_column_names) if this index uses the
// old STORING encoding (key-encoded data).
//
// Only used for secondary indexes.
// For non-unique indexes, these columns are appended to the key.
// For unique indexes, these columns are stored in the value (unless the key
// contains a NULL value: then the extra columns are appended to the key to
// unique-ify it).
// This distinction exists because we want to be able to insert an entry using
// a single conditional put on the key.
repeated uint32 extra_column_ids = 7 [(gogoproto.customname) = "ExtraColumnIDs",
(gogoproto.casttype) = "ColumnID"];
// An ordered list of column IDs that parallels store_column_names if this
// index uses the new STORING encoding (value-encoded data, always in the KV
// value).
repeated uint32 store_column_ids = 14
[(gogoproto.customname) = "StoreColumnIDs", (gogoproto.casttype) = "ColumnID"];
// CompositeColumnIDs contains an ordered list of IDs of columns that appear
// in the index and have a composite encoding. Includes IDs from both
// column_ids and extra_column_ids.
repeated uint32 composite_column_ids = 13
[(gogoproto.customname) = "CompositeColumnIDs", (gogoproto.casttype) = "ColumnID"];
// ForeignKey and ReferencedBy are deprecated and not stored from 19.2 onward.
optional ForeignKeyReference foreign_key = 9 [(gogoproto.nullable) = false, deprecated = true];
repeated ForeignKeyReference referenced_by = 10 [(gogoproto.nullable) = false, deprecated = true];
// Interleave, if it's not the zero value, describes how this index's data is
// interleaved into another index's data.
optional InterleaveDescriptor interleave = 11 [(gogoproto.nullable) = false];
// InterleavedBy contains a reference to every table/index that is interleaved
// into this one.
repeated ForeignKeyReference interleaved_by = 12 [(gogoproto.nullable) = false];
// Partitioning, if it's not the zero value, describes how this index's data
// is partitioned into spans of keys each addressable by zone configs.
optional PartitioningDescriptor partitioning = 15 [(gogoproto.nullable) = false];
// Type is the type of index, inverted or forward.
optional Type type = 16 [(gogoproto.nullable)=false];
// CreatedExplicitly specifies whether this index was created explicitly
// (i.e. via 'CREATE INDEX' statement).
optional bool created_explicitly = 17 [(gogoproto.nullable) = false];
// EncodingType represents what sort of k/v encoding is used to store this descriptor on disk.
// As of now, this includes the existing secondary index encoding, or the primary index encoding.
// N.B. This field is only recognized on secondary indexes.
optional uint32 encoding_type = 19
[(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexDescriptorEncodingType"];
// Sharded, if it's not the zero value, describes how this index is sharded.
optional ShardedDescriptor sharded = 20 [(gogoproto.nullable) = false];
// Disabled is used by the DROP PRIMARY KEY command to mark
// that this index is disabled for further use.
optional bool disabled = 21 [(gogoproto.nullable) = false];
}
// ConstraintToUpdate represents a constraint to be added to the table and
// validated for existing rows. More generally, in the future, when we support
// adding constraints that are unvalidated for existing rows and can be
// validated later using VALIDATE CONSTRAINT, this mutation will also represent
// either adding an unvalidated constraint or validating an existing constraint.
//
// This mutation effects changes only in the backfill step of the schema
// changer: First, a new version of the table descriptor with the constraint
// added is published, after all columns being added have been backfilled. After
// waiting for the constraint to be enforced for writes on all nodes, the
// constraint is then validated for all existing rows. This ensures that
// constraints added to columns that are being added are correctly enforced
// before the column becomes public.
message ConstraintToUpdate {
option (gogoproto.equal) = true;
enum ConstraintType {
CHECK = 0;
FOREIGN_KEY = 1;
// NOT NULL constraints being added are represented by a dummy check
// constraint so that a multi-state schema change, including a bulk
// validation step, can occur. The check field contains the dummy
// constraint.
NOT_NULL = 2;
}
required ConstraintType constraint_type = 1 [(gogoproto.nullable) = false];
required string name = 2 [(gogoproto.nullable) = false];
optional TableDescriptor.CheckConstraint check = 3 [(gogoproto.nullable) = false];
// All fields past 3 haven't been persisted before 19.2.
optional ForeignKeyConstraint foreign_key = 4 [(gogoproto.nullable) = false];
reserved 5;
optional uint32 not_null_column = 6 [(gogoproto.nullable) = false, (gogoproto.casttype) = "ColumnID"];
}
// PrimaryKeySwap is a mutation corresponding to the atomic swap phase
// during a primary key change where old versions of indexes are exchanged for
// updated versions, and the table's new primary key is written into the descriptor.
message PrimaryKeySwap {
option (gogoproto.equal) = true;
// old_primary_index_id is the ID of the old primary index for the table.
optional uint32 old_primary_index_id = 4 [(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexID"];
// new_primary_index_id is the ID of the new primary index for the table.
optional uint32 new_primary_index_id = 1 [(gogoproto.nullable) = false, (gogoproto.casttype) = "IndexID"];
// old_indexes and new_indexes are lists of IndexID's where the i'th index in old_indexes will be
// swapped out with the i'th index in new_indexes.
repeated uint32 old_indexes = 2 [(gogoproto.casttype) = "IndexID"];
repeated uint32 new_indexes = 3 [(gogoproto.casttype) = "IndexID"];
}
// A DescriptorMutation represents a column or an index that
// has either been added or dropped and hasn't yet transitioned
// into a stable state: completely backfilled and visible, or
// completely deleted. A table descriptor in the middle of a
// schema change will have a DescriptorMutation FIFO queue
// containing each column/index descriptor being added or dropped.
// Mutations for constraints work differently from columns and
// indexes; see the documentation for ConstraintToUpdate.
message DescriptorMutation {
option (gogoproto.equal) = true;
oneof descriptor {
ColumnDescriptor column = 1;
IndexDescriptor index = 2;
ConstraintToUpdate constraint = 8;
PrimaryKeySwap primaryKeySwap = 9;
}
// A descriptor within a mutation is unavailable for reads, writes
// and deletes. It is only available for implicit (internal to
// the database) writes and deletes depending on the state of the mutation.
enum State {
// Not used.
UNKNOWN = 0;
// Operations can use this invisible descriptor to implicitly
// delete entries.
// Column: A descriptor in this state is invisible to
// INSERT and UPDATE. DELETE must delete a column in this state.
// Index: A descriptor in this state is invisible to an INSERT.
// UPDATE must delete the old value of the index but doesn't write
// the new value. DELETE must delete the index.
//
// When deleting a descriptor, all descriptor related data
// (column or index data) can only be mass deleted once
// all the nodes have transitioned to the DELETE_ONLY state.
DELETE_ONLY = 1;
// Operations can use this invisible descriptor to implicitly
// write and delete entries.
// Column: INSERT will populate this column with the default
// value. UPDATE ignores this descriptor. DELETE must delete
// the column.
// Index: INSERT, UPDATE and DELETE treat this index like any
// other index.
//
// When adding a descriptor, all descriptor related data
// (column default or index data) can only be backfilled once
// all nodes have transitioned into the DELETE_AND_WRITE_ONLY state.
DELETE_AND_WRITE_ONLY = 2;
}
optional State state = 3 [(gogoproto.nullable) = false];
// Direction of mutation.
enum Direction {
// Not used.
NONE = 0;
// Descriptor is being added.
ADD = 1;
// Descriptor is being dropped.
DROP = 2;
}
optional Direction direction = 4 [(gogoproto.nullable) = false];
// The mutation id used to group mutations that should be applied together.
// This is used for situations like creating a unique column, which
// involve adding two mutations: one for the column, and another for the
// unique constraint index.
optional uint32 mutation_id = 5 [(gogoproto.nullable) = false,
(gogoproto.customname) = "MutationID", (gogoproto.casttype) = "MutationID"];
reserved 6;
// Indicates that this mutation is a rollback.
optional bool rollback = 7 [(gogoproto.nullable) = false];
}
// A TableDescriptor represents a table or view and is stored in a
// structured metadata key. The TableDescriptor has a globally-unique ID,
// while its member {Column,Index}Descriptors have locally-unique IDs.
message TableDescriptor {
option (gogoproto.equal) = true;
// Needed for the descriptorProto interface.
option (gogoproto.goproto_getters) = true;
// The table name. It should be normalized using NormalizeName() before
// comparing it.
optional string name = 1 [(gogoproto.nullable) = false];
optional uint32 id = 3 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ID", (gogoproto.casttype) = "ID"];
// ID of the parent database.
optional uint32 parent_id = 4 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ParentID", (gogoproto.casttype) = "ID"];
// ID of the parent schema. For backwards compatibility, 0 means the table is
// scoped under the public physical schema (id 29). Because of this backward
// compatibility issue, this field should not be accessed directly or through
// the generated getter. Instead, use GetParentSchemaID() which is defined in
// structured.go.
optional uint32 unexposed_parent_schema_id = 40 [(gogoproto.nullable) = false,
(gogoproto.customname) = "UnexposedParentSchemaID", (gogoproto.casttype) = "ID"];
// Monotonically increasing version of the table descriptor.
//
// The design maintains two invariants:
// 1. Two safe versions: A transaction at a particular timestamp is
// allowed to use one of two versions of a table descriptor:
// the one that would be read from the store at that timestamp,
// and the one behind it in version.
// 2. Two leased versions: There can be valid leases on at most the 2
// latest versions of a table in the cluster at any time. New leases
// are only granted on the latest version.
//
// The database must maintain correctness in light of there being two
// versions of a descriptor that can be used.
//
// Multiple schema change mutations can be grouped together on a
// particular version increment.
optional uint32 version = 5 [(gogoproto.nullable) = false, (gogoproto.casttype) = "DescriptorVersion"];
reserved 6;
// Last modification time of the table descriptor.
// Starting in 19.2 this field's value may sometime be zero-valued in which
// case the MVCC timestamp of the row containing the value should be used to
// populate it. This dance allows us to avoid observing the commit timestamp
// for transactions which increment the descriptor version.
// Encoded TableDescriptor structs should not be stored directly but rather
// should live inside of a Descriptor. The Descriptor.Table() method takes an
// hlc timestamp to ensure that this field is set properly when extracted from
// a Descriptor.
optional util.hlc.Timestamp modification_time = 7 [(gogoproto.nullable) = false];
repeated ColumnDescriptor columns = 8 [(gogoproto.nullable) = false];
// next_column_id is used to ensure that deleted column ids are not reused.
optional uint32 next_column_id = 9 [(gogoproto.nullable) = false,
(gogoproto.customname) = "NextColumnID", (gogoproto.casttype) = "ColumnID"];
// families holds information about the column families of this table.
// This list has at least length 1, in which case all columns are stored in the same family.
// families is stored in sorted order by family ID.
repeated ColumnFamilyDescriptor families = 22 [(gogoproto.nullable) = false];
// next_family_id is used to ensure that deleted family ids are not reused.
optional uint32 next_family_id = 23 [(gogoproto.nullable) = false,
(gogoproto.customname) = "NextFamilyID", (gogoproto.casttype) = "FamilyID"];
optional IndexDescriptor primary_index = 10 [(gogoproto.nullable) = false];
// indexes are all the secondary indexes.
repeated IndexDescriptor indexes = 11 [(gogoproto.nullable) = false];
// next_index_id is used to ensure that deleted index ids are not reused.
optional uint32 next_index_id = 12 [(gogoproto.nullable) = false,
(gogoproto.customname) = "NextIndexID", (gogoproto.casttype) = "IndexID"];
optional PrivilegeDescriptor privileges = 13;
// Columns or indexes being added or deleted in a FIFO order.
repeated DescriptorMutation mutations = 14 [(gogoproto.nullable) = false];
// The schema update lease. A single goroutine across a cockroach cluster
// can own it, and will execute pending schema changes for this table.
// Since the execution of a pending schema change is through transactions,
// it is legal for more than one goroutine to attempt to execute it. This
// lease reduces write contention on the schema change.
message SchemaChangeLease {
option (gogoproto.equal) = true;
optional uint32 node_id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "NodeID",
(gogoproto.casttype) = "github.com/cockroachdb/cockroach/pkg/roachpb.NodeID"];
// Nanoseconds since the Unix epoch.
optional int64 expiration_time = 2 [(gogoproto.nullable) = false];
}
optional SchemaChangeLease lease = 15 [deprecated = true];
// An id for the next group of mutations to be applied together.
optional uint32 next_mutation_id = 16 [(gogoproto.nullable) = false,
(gogoproto.customname) = "NextMutationID", (gogoproto.casttype) = "MutationID"];
// format_version declares which sql to key:value mapping is being used to
// represent the data in this table.
optional uint32 format_version = 17 [(gogoproto.nullable) = false,
(gogoproto.casttype) = "FormatVersion"];
reserved 18;
// State is set if this TableDescriptor is in the process of being added or deleted.
// A non-public table descriptor cannot be leased.
// A schema changer observing DROP set will truncate the table and delete the
// descriptor.
// It is illegal to transition DROP to any other state.
enum State {
// Not used.
PUBLIC = 0;
// Descriptor is being added.
ADD = 1;
// Descriptor is being dropped.
DROP = 2;
// Descriptor is offline (e.g. for bulk-ingestion). See offline_reason.
OFFLINE = 3;
}
optional State state = 19 [(gogoproto.nullable) = false];
optional string offline_reason = 38 [(gogoproto.nullable) = false];
message CheckConstraint {
option (gogoproto.equal) = true;
optional string expr = 1 [(gogoproto.nullable) = false];
optional string name = 2 [(gogoproto.nullable) = false];
optional ConstraintValidity validity = 3 [(gogoproto.nullable) = false];
reserved 4;
// An ordered list of column IDs used by the check constraint.
repeated uint32 column_ids = 5 [(gogoproto.customname) = "ColumnIDs",
(gogoproto.casttype) = "ColumnID"];
optional bool is_non_null_constraint = 6 [(gogoproto.nullable) = false];
// Whether the check constraint should show up in the result of a `SHOW CREATE
// TABLE..` statement.
optional bool hidden = 7 [(gogoproto.nullable) = false];
}
repeated CheckConstraint checks = 20;
// A table descriptor is named through a name map stored in the
// system.namespace table: a map from {parent_id, table_name} -> id.
// This name map can be cached for performance on a node in the cluster
// making reassigning a name complicated. In particular, since a
// name cannot be withdrawn across a cluster in a transaction at
// timestamp T, we have to worry about the following:
//
// 1. A table is dropped at T, and the name and descriptor are still
// cached and used by transactions at timestamps >= T.
// 2. A table is renamed from foo to bar at T, and both names foo and bar
// can be used by transactions at timestamps >= T.
// 3. A name foo is reassigned from one table to another at T, and the name
// foo can reference two different tables at timestamps >= T.
//
// The system ensures that a name can be resolved only to a single
// descriptor at a timestamp thereby permitting 1 and 2, but not 3
// (the name references two tables).
//
// The transaction at T is followed by a time period when names no longer
// a part of the namespace are drained from the system. Once the old name
// is drained from the system another transaction at timestamp S is
// executed to release the name for future use. The interval from T to S
// is called the name drain interval: If the T transaction is removing
// the name foo then, at timestamps above S, foo can no longer be resolved.
//
// Consider a transaction at T in which name B is dropped, a new name C is
// created. Name C is viable as soon as the transaction commits.
// When the transaction at S commits, the name B is released for reuse.
//
// The transaction at S runs through the schema changer, with the system
// returning a response to the client initiating transaction T only after
// transaction at S is committed. So effectively the SQL transaction once
// it returns can be followed by SQL transactions that do not observe
// old name mappings.
//
// Note: an exception to this is #19925 which needs to be fixed.
//
// In order for transaction at S to act properly the system.namespace
// table entry for an old name references the descriptor who was the
// prior owner of the name requiring draining.
//
// Before T: B -> Desc B
//
// After T and before S: B -> Desc B, C -> Desc C
//
// After S: C -> Desc C
//
// Between T and S the name B is drained and the system is unable
// to assign it to another descriptor.
//
// BEGIN;
// RENAME foo TO bar;
// CREATE foo;
//
// will fail because CREATE foo is executed at T.
//
// RENAME foo TO bar;
// CREATE foo;
//
// will succeed because the RENAME returns after S and CREATE foo is
// executed after S.
//
// The above scheme suffers from the problem that a transaction can observe
// the partial effect of a committed transaction during the drain interval.
// For instance during the drain interval a transaction can see the correct
// assignment for C, and the old assignments for B.
//
message NameInfo {
option (gogoproto.equal) = true;
// The database that the table belonged to before the rename (tables can be
// renamed from one db to another).
optional uint32 parent_id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ParentID", (gogoproto.casttype) = "ID"];
// The schemaID of the schema the table belongs to before the rename/drop.
// Required to correctly identify which namespace entry to reclaim.
optional uint32 parent_schema_id = 3 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ParentSchemaID", (gogoproto.casttype) = "ID"];
optional string name = 2 [(gogoproto.nullable) = false];
}
// A list of draining names. The draining name entries are drained from
// the cluster wide name caches by incrementing the version for this
// descriptor and ensuring that there are no leases on prior
// versions of the descriptor. This field is then cleared and the version
// of the descriptor incremented.
repeated NameInfo draining_names = 21 [(gogoproto.nullable) = false];
// The TableDescriptor is used for views in addition to tables. Views
// use mostly the same fields as tables, but need to track the actual
// query from the view definition as well.
//
// For now we only track a string representation of the query. This prevents
// us from easily supporting things like renames of the dependencies of a
// view. Eventually we'll want to switch to a semantic encoding of the query
// that relies on IDs rather than names so that we can support renames of
// fields relied on by the query, as Postgres does.
//
// Note: The presence of this field is used to determine whether or not
// a TableDescriptor represents a view.
optional string view_query = 24 [(gogoproto.nullable) = false];
// The IDs of all relations that this depends on.
// Only ever populated if this descriptor is for a view.
repeated uint32 dependsOn = 25 [(gogoproto.customname) = "DependsOn",
(gogoproto.casttype) = "ID"];
message Reference {
option (gogoproto.equal) = true;
// The ID of the relation that depends on this one.
optional uint32 id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ID", (gogoproto.casttype) = "ID"];
// If applicable, the ID of this table's index that is referenced by the
// dependent relation.
optional uint32 index_id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "IndexID", (gogoproto.casttype) = "IndexID"];
// The IDs of this table's columns that are referenced by the dependent
// relation.
repeated uint32 column_ids = 3 [(gogoproto.customname) = "ColumnIDs",
(gogoproto.casttype) = "ColumnID"];
}
// All references to this table/view from other views and sequences in the system,
// tracked down to the column/index so that we can restrict changes to them while
// they're still being referred to.
repeated Reference dependedOnBy = 26 [(gogoproto.nullable) = false,
(gogoproto.customname) = "DependedOnBy"];
message MutationJob {
option (gogoproto.equal) = true;
// The mutation id of this mutation job.
optional uint32 mutation_id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "MutationID", (gogoproto.casttype) = "MutationID"];
// The job id for a mutation job is the id in the system.jobs table of the
// schema change job executing the mutation referenced by mutation_id.
optional int64 job_id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "JobID"];
}
// Mutation jobs queued for execution in a FIFO order. Remains synchronized
// with the mutations list.
repeated MutationJob mutationJobs = 27 [(gogoproto.nullable) = false];
message SequenceOpts {
option (gogoproto.equal) = true;
// How much to increment the sequence by when nextval() is called.
optional int64 increment = 1 [(gogoproto.nullable) = false];
// Minimum value of the sequence.
optional int64 min_value = 2 [(gogoproto.nullable) = false];
// Maximum value of the sequence.
optional int64 max_value = 3 [(gogoproto.nullable) = false];
// Start value of the sequence.
optional int64 start = 4 [(gogoproto.nullable) = false];
// Whether the sequence is virtual.
optional bool virtual = 5 [(gogoproto.nullable) = false];
message SequenceOwner {
option (gogoproto.equal) = true;
// Sequence Owner's Column ID
optional uint32 owner_column_id = 1 [(gogoproto.nullable) = false,
(gogoproto.customname) = "OwnerColumnID",
(gogoproto.casttype) = "ColumnID"];
// Sequence Owner's Table ID
optional uint32 owner_table_id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "OwnerTableID",
(gogoproto.casttype) = "ID"];
}
optional SequenceOwner sequence_owner = 6 [(gogoproto.nullable) = false];
}
// The presence of sequence_opts indicates that this descriptor is for a sequence.
optional SequenceOpts sequence_opts = 28;
// The drop time is set when a table is truncated or dropped,
// based on the current time in nanoseconds since the epoch.
// Use this timestamp + GC TTL to start deleting the table's
// contents.
//
// TODO(vivek): Replace with the ModificationTime. This has been
// added only for migration purposes.
optional int64 drop_time = 29 [(gogoproto.nullable) = false];
message Replacement {
option (gogoproto.equal) = true;
optional uint32 id = 1 [(gogoproto.nullable) = false, (gogoproto.customname) = "ID", (gogoproto.casttype) = "ID"];
// Time is just used for debugging purposes. It is not used in business
// logic. It is an HLC rather than just wall time only for historical
// reasons. Prior to 20.1 it was populated with the commit timestamp of the
// transaction which created this replacement. In 20.1 and after it is
// populated with the read timestamp at which the descriptor being
// replaced was read.
optional util.hlc.Timestamp time = 2 [(gogoproto.nullable) = false];
}
// ReplacementOf tracks prior IDs by which this table went -- e.g. when
// TRUNCATE creates a replacement of a table and swaps it in for the the old
// one, it should note on the new table the ID of the table it replaced. This
// can be used when trying to track a table's history across truncatations.
optional Replacement replacement_of = 30 [(gogoproto.nullable) = false];
// AuditMode indicates which auditing actions to take when this table is used.
enum AuditMode {
DISABLED = 0;
READWRITE = 1;
}
optional AuditMode audit_mode = 31 [(gogoproto.nullable) = false];
// The job id for a drop job is the id in the system.jobs table of the
// dropping of this table.
optional int64 drop_job_id = 32 [(gogoproto.nullable) = false, (gogoproto.customname) = "DropJobID"];
message GCDescriptorMutation {
option (gogoproto.equal) = true;
optional int64 index_id = 1 [(gogoproto.nullable) = false, (gogoproto.customname) = "IndexID",
(gogoproto.casttype) = "IndexID"];
optional int64 drop_time = 2 [(gogoproto.nullable) = false, deprecated = true];
// The job id for a mutation job is the id in the system.jobs table of the
// schema change job executing the mutation referenced by mutation_id.
optional int64 job_id = 3 [(gogoproto.nullable) = false,
(gogoproto.customname) = "JobID", deprecated = true];
}
// The schema elements that have been dropped and whose underlying
// data needs to be gc-ed. These schema elements have already transitioned
// through the drop state machine when they were in the above mutations
// list, and can be safely deleted. The names for these schema elements
// can be reused. This list is separate because mutations can
// lie in this list for a long time (gc deadline) and should not block
// the execution of other schema changes on the table.
//
// TODO(vivekmenezes): This is currently only used by the non-interleaved drop
// index case. Also use for dropped interleaved indexes and columns.
repeated GCDescriptorMutation gc_mutations = 33 [(gogoproto.nullable) = false,
(gogoproto.customname) = "GCMutations"];
optional string create_query = 34 [(gogoproto.nullable) = false];
// Starting in 19.2 CreateAsOfTime is initialized to zero for the first
// version of a table and is populated from the MVCC timestamp of the read
// like ModificationTime. See Descriptor.Table().
// CreateAsOfSystemTime is used for CREATE TABLE ... AS ... and was
// added in 19.1.
optional util.hlc.Timestamp create_as_of_time = 35 [(gogoproto.nullable) = false];
// outbound_fks contains all foreign key constraints that have this table as
// the origin table.
repeated ForeignKeyConstraint outbound_fks = 36 [(gogoproto.nullable) = false, (gogoproto.customname) = "OutboundFKs"];
// inbound_fks contains all foreign key constraints that have this table as
// the referenced table.
repeated ForeignKeyConstraint inbound_fks = 37 [(gogoproto.nullable) = false, (gogoproto.customname) = "InboundFKs"];
// Temporary table support will be added to CRDB starting from 20.1. The temporary
// flag is set to true for all temporary tables. All table descriptors created
// before 20.1 refer to persistent tables, so lack of the flag being set implies
// the table is persistent.
optional bool temporary = 39 [(gogoproto.nullable) = false];
}
// DatabaseDescriptor represents a namespace (aka database) and is stored
// in a structured metadata key. The DatabaseDescriptor has a globally-unique
// ID shared with the TableDescriptor ID.
// Permissions are applied to all tables in the namespace.
message DatabaseDescriptor {
option (gogoproto.equal) = true;
// Needed for the descriptorProto interface.
option (gogoproto.goproto_getters) = true;
optional string name = 1 [(gogoproto.nullable) = false];
optional uint32 id = 2 [(gogoproto.nullable) = false,
(gogoproto.customname) = "ID", (gogoproto.casttype) = "ID"];
optional PrivilegeDescriptor privileges = 3;
}
// Descriptor is a union type holding either a table or database descriptor.
message Descriptor {
option (gogoproto.equal) = true;
oneof union {
TableDescriptor table = 1;
DatabaseDescriptor database = 2;
}
}