github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/sql/types/types.proto

// 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.sem.types;
option go_package = "types";

import "gogoproto/gogo.proto";
import "geo/geopb/geopb.proto";

// See the comment header for the T.Family method for more details.
enum Family {
    option (gogoproto.goproto_enum_prefix) = false;

    // BoolFamily is the family of boolean true/false types.
    //
    //   Canonical: types.Bool
    //   Oid      : T_bool
    //
    // Examples:
    //   BOOL
    //
    BoolFamily = 0;

    // IntFamily is the family of signed integer types.
    //
    //   Canonical: types.Int
    //   Oid      : T_int8, T_int4, T_int2
    //   Width    : 64, 32, 16
    //
    // Examples:
    //   INT
    //   INT8
    //   INT4
    //
    IntFamily = 1;

    // FloatFamily is the family of base-2 floating-point types (IEEE 754).
    //
    //   Canonical: types.Float
    //   Oid      : T_float8, T_float4
    //   Width    : 64, 32
    //
    // Examples:
    //   FLOAT8
    //   FLOAT4
    //
    FloatFamily = 2;

    // DecimalFamily is the family of base-10 floating and fixed point types.
    //
    //   Canonical    : types.Decimal
    //   Oid          : T_numeric
    //   Precision    : max # decimal digits (0 = no specified limit)
    //   Width (Scale): # digits after decimal point (0 = no specified limit)
    //
    // Examples:
    //   DECIMAL
    //   DECIMAL(10)
    //   DECIMAL(10,3)
    //
    DecimalFamily = 3;

    // DateFamily is the family of date types that store only year/month/day with
    // no time component.
    //
    //   Canonical: types.Date
    //   Oid      : T_date
    //
    // Examples:
    //   DATE
    //
    DateFamily = 4;

    // TimestampFamily is the family of date types that store a year/month/day
    // date component, as well as an hour/minute/second time component. There is
    // no timezone component (see TIMESTAMPTZ). Seconds can have varying precision
    // (defaults to microsecond precision). Currently, only microsecond precision
    // is supported.
    //
    //   Canonical: types.Timestamp
    //   Oid      : T_timestamp
    //   Precision: fractional seconds (3 = ms, 0,6 = us, 9 = ns, etc.)
    //
    // Examples:
    //   TIMESTAMP
    //   TIMESTAMP(6)
    //
    TimestampFamily = 5;

    // IntervalFamily is the family of types describing a duration of time.
    // Currently, only microsecond precision is supported.
    //
    //   Canonical: types.Interval
    //   Oid      : T_interval
    //
    // Examples:
    //   INTERVAL
    //
    IntervalFamily = 6;

    // StringFamily is the family of types containing Unicode textual strings.
    // This family includes types constructed by STRING, VARCHAR, CHAR, and "char"
    // column type definitions (CHAR and "char" are distinct PG types). Note
    // that while STRING and VARCHAR have no default width limit, CHAR has a
    // default width of 1.
    // TODO(andyk): "char" should have default width of 1 as well, but doesn't.
    //
    //   Canonical: types.String
    //   Oid      : T_text, T_varchar, T_bpchar, T_char
    //   Width    : max # characters (0 = no specified limit)
    //
    // Examples:
    //   STRING
    //   TEXT
    //   VARCHAR(10)
    //   CHAR
    //
    StringFamily = 7;

    // BytesFamily is the family of types containing a list of raw byte values.
    //
    //   Canonical: types.BYTES
    //   Oid      : T_bytea
    //
    // Examples:
    //   BYTES
    //
    BytesFamily = 8;

    // TimestampTZFamily is the family of date types that store a year/month/day
    // date component, as well as an hour/minute/second time component, along with
    // a timezone. Seconds can have varying precision (defaults to microsecond
    // precision). Currently, only microsecond precision is supported.
    //
    //   Canonical: types.TimestampTZ
    //   Oid      : T_timestamptz
    //   Precision: fractional seconds (3 = ms, 0,6 = us, 9 = ns, etc.)
    //
    // Examples:
    //   TIMESTAMPTZ
    //   TIMESTAMPTZ(6)
    //
    TimestampTZFamily = 9;

    // CollatedStringFamily is the family of types containing Unicode textual
    // strings with an associated COLLATE value that specifies the locale used
    // for various character-based operations such as sorting, pattern matching,
    // and builtin functions like lower and upper.
    //
    //   Oid      : T_text, T_varchar, T_bpchar, T_char
    //   Width    : max # characters (0 = no specified limit)
    //   Locale   : name of locale (e.g. EN or DE)
    //
    // Examples:
    //   STRING COLLATE en
    //   VARCHAR(10) COLLATE de
    //
    CollatedStringFamily = 10;

    // NAME deprecated in 19.1, since it now uses Oid.
    reserved 11;

    // OidFamily is the family of types containing Postgres Object ID (Oid)
    // values. Oids are integer values that identify some object in the database,
    // like a type, relation, or procedure.
    //
    //   Canonical: types.Oid
    //   Oid      : T_oid, T_regclass, T_regproc, T_regprocedure, T_regtype,
    //              T_regnamespace
    //
    // Examples:
    //   OID
    //   REGCLASS
    //   REGPROC
    //
    // TODO(andyk): Oids should be part of the IntFamily, since they are treated
    //              as equivalent to ints by PG.
    OidFamily = 12;

    // UnknownFamily is a special type family that tags expressions that
    // statically evaluate to NULL. An UnknownFamily expression *must* be NULL.
    // But the inverse is not true, since other types allow NULL values as well.
    // UnknownFamily types are not supported as a table column type, but can be
    // transferred through DistSQL streams.
    //
    //   Canonical: types.Unknown
    //   Oid      : T_unknown
    //
    UnknownFamily = 13;

    // UuidFamily is the family of types containing universally unique
    // identifiers. A UUID is a 128-bit quantity that is very unlikely to ever be
    // generated again, and so can be relied on to be distinct from all other UUID
    // values.
    //
    //   Canonical: types.Uuid
    //   Oid      : T_uuid
    //
    // Examples:
    //   UUID
    //
    UuidFamily = 14;

    // ArrayFamily is a family of non-scalar types that contain an ordered list of
    // elements. The elements of an array must all share the same type. Elements
    // can have have any type, including ARRAY. However, while the types package
    // supports nested arrays, other parts of CRDB do not currently support them.
    // Also, the length of array dimension(s) are ignored by PG and CRDB (e.g.
    // an array of length 11 could be inserted into a column declared as INT[11]).
    //
    // Array OID values are special. Rather than having a single T_array OID,
    // Postgres defines a separate OID for each possible array element type.
    // Here are some examples:
    //
    //   T__int8: array of int8 values
    //   T__text: array of text values
    //
    // Notice that each array OID has double underscores to distinguish it from
    // the OID of the scalar type it contains.
    //
    //   Oid          : T__int, T__text, T__numeric, etc.
    //   ArrayContents: types.T of the array element type
    //
    // Examples:
    //   INT[]
    //   VARCHAR(10)[] COLLATE EN
    //   DECIMAL(10,1)[]
    //   TIMESTAMP[5]
    //
    ArrayFamily = 15;

    // INetFamily is the family of types containing IPv4 or IPv6 network address
    // identifiers (e.g. 192.168.100.128/25 or FE80:CD00:0:CDE:1257:0:211E:729C).
    //
    //   Canonical: types.INet
    //   Oid      : T_inet
    //
    // Examples:
    //   INET
    //
    INetFamily = 16;

    // TimeFamily is the family of date types that store only hour/minute/second
    // with no date component. There is no timezone component. Seconds can have
    // varying precision (defaults to microsecond precision). Currently, only
    // microsecond precision is supported.
    //
    //   Canonical: types.Time
    //   Oid      : T_time
    //   Precision: fractional seconds (3 = ms, 0,6 = us, 9 = ns, etc.)
    //
    // Examples:
    //   TIME
    //   TIME(6)
    //
    TimeFamily = 17;

    // JsonFamily is the family of types containing JavaScript Object Notation
    // (JSON) values. Currently, CRDB only supports JSONB values, which are stored
    // in a decomposed binary format.
    //
    //   Canonical: types.Jsonb
    //   Oid      : T_jsonb
    //
    // Examples:
    //   JSON
    //   JSONB
    //
    JsonFamily = 18;

    // TimeTZFamily is the family of date types that store only hour/minute/second
    // and timestamp components, with no date component. Seconds can have
    // varying precision (defaults to microsecond precision). Currently, only
    // microsecond precision is supported.
    //
    //   Canonical: types.TimeTZ
    //   Oid      : T_timetz
    //   Precision: fractional seconds (3 = ms, 0,6 = us, 9 = ns, etc.)
    //
    // Examples:
    //   TIMETZ
    //
    TimeTZFamily = 19;

    // TupleFamily is a family of non-scalar structural types that describes the
    // fields of a row or record. The fields can be of any type, including nested
    // tuple and array types. Fields can also have optional labels. Currently,
    // CRDB does not support tuple types as column types, but it is possible to
    // construct tuples using the ROW function or tuple construction syntax.
    //
    //   Oid          : T_record
    //   TupleContents: []*types.T of each tuple field
    //   TupleLabels  : []string of each tuple label
    //
    // Examples:
    //   (1, 'foo')
    //   ((1, 'foo') AS num, str)
    //   ROW(1, 'foo')
    //   (ROW(1, 'foo') AS num, str)
    //
    TupleFamily = 20;

    // BitFamily is the family of types containing ordered lists of bit values
    // (0 or 1). Note that while VARBIT has no default width limit, BIT has a
    // default width limit of 1.
    //
    //   Canonical: types.VarBit
    //   Oid      : T_varbit, T_bit
    //   Width    : max # of bits (0 = no specified limit)
    //
    // Examples:
    //   VARBIT
    //   VARBIT(10)
    //   BIT
    //   BIT(10)
    //
    BitFamily = 21;

    // GeometryFamily is a family that supports the Geometry geospatial type,
    // which is compatible with PostGIS's Geometry implementation.
    //
    //   Canonical: types.Geometry
    //   Oid      : oidext.T_geometry
    //
    // Examples:
    //   GEOMETRY
    //   GEOMETRY(LINESTRING)
    //   GEOMETRY(LINESTRING, SRID)
    GeometryFamily = 22;

    // GeographyFamily is a family that supports the Geography geospatial type,
    // which is compatible with PostGIS's Geography implementation.
    //
    //   Canonical: types.Geography
    //   Oid      : oidext.T_geography
    //
    // Examples:
    //   GEOGRAPHY
    //   GEOGRAPHY(LINESTRING)
    //   GEOGRAPHY(LINESTRING, SRID)
    GeographyFamily = 23;

    // EnumFamily is a family that represents all ENUM types. ENUM types
    // have data about the ENUM defined in a TypeDescriptor. The ID of
    // the TypeDescriptor that backs this ENUM is stored in the StableTypeID
    // field. It does not have a canonical form.
    EnumFamily = 24;

    // AnyFamily is a special type family used during static analysis as a
    // wildcard type that matches any other type, including scalar, array, and
    // tuple types. Execution-time values should never have this type. As an
    // example of its use, many SQL builtin functions allow an input value to be
    // of any type, and so use this type in their static definitions.
    //
    //   Canonical: types.Any
    //   Oid      : T_anyelement
    //
    AnyFamily = 100;

    // Int2VectorFamily deprecated in 19.1, since it now uses Oid.
    reserved 200;

    // OidVectorFamily deprecated in 19.1, since it now uses Oid.
    reserved 201;
}

// IntervalDurationType represents a duration that can be used
// when defining an Interval Duration Field.
// See https://www.postgresql.org/docs/current/datatype-datetime.html.
enum IntervalDurationType {
  // UNSET defaults to SECOND during evaluation.
  // This indicates no typmod.
  UNSET = 0;

  YEAR = 1;
  MONTH = 2;
  DAY = 3;
  HOUR = 4;
  MINUTE = 5;
  // SECOND is the only unit where precision can be added.
  SECOND = 6;

  // MILLISECOND is not technically part of the SQL standard for intervals, but we
  // provide it as a field to allow code to parse intervals with a default unit
  // of milliseconds, which is useful for some internal use cases like
  // statement_timeout.
  MILLISECOND = 7;
}

// IntervalDurationField represents precisions in intervals which are
// outside of the regular time precision syntax.
// i.e. instead of INTERVAL(6), we can have INTERVAL SECOND(6), INTERVAL MONTH, etc.
// This is represented as a bitmask on the first 4 bits of precision in postgres.
message IntervalDurationField {
  // DurationType is the unit of measurement in which durations
  // should truncate themselves to.
  // This (unlike precision) gets truncated downward.
  optional IntervalDurationType duration_type = 1 [(gogoproto.nullable) = false];
  // FromDurationType is the left side of the "duration field".
  // i.e. in the `DurationType_1 TO DurationType_2` syntax, this represents `DurationType_1`.
  // Note this is ignored, see https://www.postgresql.org/message-id/20110510040219.GD5617%40tornado.gateway.2wire.net.
  optional IntervalDurationType from_duration_type = 2 [(gogoproto.nullable) = false];
}

// GeoMetadata contains metadata associated with Geospatial data types.
message GeoMetadata {
  optional int32 srid = 1 [(gogoproto.nullable)=false,(gogoproto.customname)="SRID",(gogoproto.casttype)="github.com/cockroachdb/cockroach/pkg/geo/geopb.SRID"];
  optional geopb.Shape shape = 2 [(gogoproto.nullable)=false];
}

// PersistentUserDefinedTypeMetadata contains user defined type metadata
// that will be serialized to disk, unlike other user defined type metadata
// that is only stored in memory once a type is resolved.
message PersistentUserDefinedTypeMetadata {
  // StableTypeID is the ID of the backing TypeDescriptor for this type.
  optional uint32 stable_type_id = 1
    [(gogoproto.nullable) = false, (gogoproto.customname) = "StableTypeID"];

  // StableArrayTypeID is the ID of the TypeDescriptor that defines the backs
  // the automatically generated array type for this type. StableArrayTypeID
  // is only set for user defined types that aren't arrays.
  optional uint32 stable_array_type_id = 2
    [(gogoproto.nullable) = false, (gogoproto.customname) = "StableArrayTypeID"];
}

// T is a wrapper around InternalType.
message T {
    option (gogoproto.typedecl) = false;
    option (gogoproto.marshaler) = false;
    option (gogoproto.unmarshaler) = false;
    option (gogoproto.sizer) = false;
    option (gogoproto.goproto_getters) = false;
    option (gogoproto.goproto_stringer) = false;
    // InternalType should never be directly referenced outside this package. The
    // only reason it is exported is because gogoproto panics when printing the
    // string representation of an unexported field. This is a problem when this
    // struct is embedded in a larger struct (like a ColumnDescriptor).
    optional InternalType internal_type = 1 [(gogoproto.nullable) = false];
}

// InternalType is the protobuf encoding for SQL types. It is always wrapped by
// a T struct, and should never be used directly by outside packages. See the
// comment header for the T struct for more details.
message InternalType {
    // Family specifies a group of types that are compatible with one another.
    // See the header for the T.Family method for more details.
    optional sql.sem.types.Family family = 1 [(gogoproto.nullable) = false];

    // Width is the size or scale of the type, such as number of bits or
    // characters. See the T.Width method for more details.
    optional int32 width = 2 [(gogoproto.nullable) = false];

    // Precision is the accuracy of the data type. See the T.Precision method for
    // more details. This field was also by FLOAT pre-2.1 (this was incorrect.)
    optional int32 precision = 3 [(gogoproto.nullable) = false];

    // ArrayDimensions is deprecated in 19.2, since it was never used. It
    // previously contained the length of each dimension in the array. A
    // dimension of -1 meant that no bound was specified for that dimension. If
    // arrayDimensions was nil, then the array had one unbounded dimension.
    repeated int32 array_dimensions = 4;

    // Locale identifies a specific geographical, political, or cultural region that
    // impacts various character-based operations such as sorting, pattern matching,
    // and builtin functions like lower and upper. See the T.Locale method for
    // more details.
    optional string locale = 5;

    // VisibleType is deprecated in 19.2, since it is now superseded by the Oid
    // field. It previously contained an alias for any types where our internal
    // representation is different than the user specification. Examples are INT4,
    // FLOAT4, etc. Mostly for Postgres compatibility.
    optional int32 visible_type = 6 [(gogoproto.nullable) = false];

    // ArrayElemType is deprecated in 19.2, since it is now superseded by the
    // ArrayContents field. It previously contained the type family of array
    // elements. The other array fields (width/precision/locale/etc) were used
    // to store the other attributes of the array's element type.
    optional sql.sem.types.Family array_elem_type = 7;

    // TupleContents returns a slice containing the type of each tuple field. This
    // is nil for non-TUPLE types.
    repeated T tuple_contents = 8;

    // TupleLabels returns a slice containing the labels of each tuple field. This
    // is nil for non-TUPLE types, or if the TUPLE type does not specify labels.
    repeated string tuple_labels = 9;

    // Oid returns the type's Postgres Object ID. See the header for the T.Oid
    // method for more details. For user-defined types, the OID value is an
    // offset (oidext.CockroachPredefinedOIDMax) away from the stable_type_id
    // field. This makes it easy to retrieve a type descriptor by OID.
    optional uint32 oid = 10 [(gogoproto.nullable) = false, (gogoproto.customname) = "Oid", (gogoproto.customtype) = "github.com/lib/pq/oid.Oid"];

    // ArrayContents returns the type of array elements. This is nil for non-ARRAY
    // types.
    optional T array_contents = 11;

    // TimePrecisionIsSet indicates whether the precision was explicitly set.
    // It is currently in use for the TIME-related families and INTERVALs
    // where a Precision of 0 indicated the default precision of 6
    // in versions pre-20.1.
    // The rules for Precision to use are as follows:
    //   * If Precision is > 0, then that is the precision.
    //   * If Precision is 0, it will default to 6 if TimePrecisionIsSet is false
    //    (for compatibility reasons).
    //   * Otherwise, Precision = 0 and TimePrecisionIsSet = true, so it is
    //     actually 0.
    optional bool time_precision_is_set = 12 [(gogoproto.nullable) = false];

    // IntervalDurationField is populated for intervals, representing extra
    // typmod or precision data that may be required.
    optional IntervalDurationField interval_duration_field = 13;

    // GeoMetadata is populated for geospatial types.
    optional GeoMetadata geo_metadata = 14;

    // UDTMetadata is populated for user defined types.
    optional PersistentUserDefinedTypeMetadata udt_metadata = 15 [(gogoproto.customname) = "UDTMetadata"];
}