postgres

package
v0.6.1 Latest Latest
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 Go to latest Published: Aug 17, 2022 License: Apache-2.0 Imports: 21 Imported by: 53

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Constants

View Source 
const (
	TypeInt64    = "int64"
	TypeGeometry = "geometry"
)

CockroachDB types that are not part of PostgreSQL.

View Source 
const (
	TypeBit     = "bit"
	TypeBitVar  = "bit varying"
	TypeBoolean = "boolean"
	TypeBool    = "bool" // boolean.
	TypeBytea   = "bytea"

	TypeCharacter = "character"
	TypeChar      = "char" // character
	TypeCharVar   = "character varying"
	TypeVarChar   = "varchar" // character varying
	TypeText      = "text"

	TypeSmallInt = "smallint"
	TypeInteger  = "integer"
	TypeBigInt   = "bigint"
	TypeInt      = "int"  // integer.
	TypeInt2     = "int2" // smallint.
	TypeInt4     = "int4" // integer.
	TypeInt8     = "int8" // bigint.

	TypeCIDR     = "cidr"
	TypeInet     = "inet"
	TypeMACAddr  = "macaddr"
	TypeMACAddr8 = "macaddr8"

	TypeCircle  = "circle"
	TypeLine    = "line"
	TypeLseg    = "lseg"
	TypeBox     = "box"
	TypePath    = "path"
	TypePolygon = "polygon"
	TypePoint   = "point"

	TypeDate          = "date"
	TypeTime          = "time"   // time without time zone
	TypeTimeTZ        = "timetz" // time with time zone
	TypeTimeWTZ       = "time with time zone"
	TypeTimeWOTZ      = "time without time zone"
	TypeTimestamp     = "timestamp" // timestamp without time zone
	TypeTimestampTZ   = "timestamptz"
	TypeTimestampWTZ  = "timestamp with time zone"
	TypeTimestampWOTZ = "timestamp without time zone"

	TypeDouble = "double precision"
	TypeReal   = "real"
	TypeFloat8 = "float8" // double precision
	TypeFloat4 = "float4" // real
	TypeFloat  = "float"  // float(p).

	TypeNumeric = "numeric"
	TypeDecimal = "decimal" // numeric

	TypeSmallSerial = "smallserial" // smallint with auto_increment.
	TypeSerial      = "serial"      // integer with auto_increment.
	TypeBigSerial   = "bigserial"   // bigint with auto_increment.
	TypeSerial2     = "serial2"     // smallserial
	TypeSerial4     = "serial4"     // serial
	TypeSerial8     = "serial8"     // bigserial

	TypeArray       = "array"
	TypeXML         = "xml"
	TypeJSON        = "json"
	TypeJSONB       = "jsonb"
	TypeUUID        = "uuid"
	TypeMoney       = "money"
	TypeInterval    = "interval"
	TypeUserDefined = "user-defined"
)

Standard column types (and their aliases) as defined in PostgreSQL codebase/website.

View Source 
const (
	IndexTypeBTree = "BTREE"
	IndexTypeHash  = "HASH"
	IndexTypeGIN   = "GIN"
	IndexTypeGiST  = "GIST"
	IndexTypeBRIN  = "BRIN"
)

List of supported index types.

View Source 
const (
	GeneratedTypeAlways    = "ALWAYS"
	GeneratedTypeByDefault = "BY_DEFAULT" // BY DEFAULT.
)

List of "GENERATED" types.

View Source 
const (
	PartitionTypeRange = "RANGE"
	PartitionTypeList  = "LIST"
	PartitionTypeHash  = "HASH"
)

List of PARTITION KEY types.

View Source 
const DriverName = "postgres"

DriverName holds the name used for registration.

Variables

View Source 
var (

	// MarshalHCL marshals v into an Atlas HCL DDL document.
	MarshalHCL = schemahcl.MarshalerFunc(func(v any) ([]byte, error) {
		return MarshalSpec(v, hclState)
	})
	// EvalHCL implements the schemahcl.Evaluator interface.
	EvalHCL = schemahcl.EvalFunc(evalSpec)

	// EvalHCLBytes is a helper that evaluates an HCL document from a byte slice instead
	// of from an hclparse.Parser instance.
	EvalHCLBytes = specutil.HCLBytesFunc(EvalHCL)
)
View Source 
var TypeRegistry = schemahcl.NewRegistry(
	schemahcl.WithSpecFunc(typeSpec),
	schemahcl.WithParser(ParseType),
	schemahcl.WithSpecs(
		schemahcl.NewTypeSpec(TypeBit, schemahcl.WithAttributes(&schemahcl.TypeAttr{Name: "len", Kind: reflect.Int64})),
		schemahcl.AliasTypeSpec("bit_varying", TypeBitVar, schemahcl.WithAttributes(&schemahcl.TypeAttr{Name: "len", Kind: reflect.Int64})),
		schemahcl.NewTypeSpec(TypeVarChar, schemahcl.WithAttributes(schemahcl.SizeTypeAttr(false))),
		schemahcl.AliasTypeSpec("character_varying", TypeCharVar, schemahcl.WithAttributes(schemahcl.SizeTypeAttr(false))),
		schemahcl.NewTypeSpec(TypeChar, schemahcl.WithAttributes(schemahcl.SizeTypeAttr(false))),
		schemahcl.NewTypeSpec(TypeCharacter, schemahcl.WithAttributes(schemahcl.SizeTypeAttr(false))),
		schemahcl.NewTypeSpec(TypeInt2),
		schemahcl.NewTypeSpec(TypeInt4),
		schemahcl.NewTypeSpec(TypeInt8),
		schemahcl.NewTypeSpec(TypeInt),
		schemahcl.NewTypeSpec(TypeInteger),
		schemahcl.NewTypeSpec(TypeSmallInt),
		schemahcl.NewTypeSpec(TypeBigInt),
		schemahcl.NewTypeSpec(TypeText),
		schemahcl.NewTypeSpec(TypeBoolean),
		schemahcl.NewTypeSpec(TypeBool),
		schemahcl.NewTypeSpec(TypeBytea),
		schemahcl.NewTypeSpec(TypeCIDR),
		schemahcl.NewTypeSpec(TypeInet),
		schemahcl.NewTypeSpec(TypeMACAddr),
		schemahcl.NewTypeSpec(TypeMACAddr8),
		schemahcl.NewTypeSpec(TypeCircle),
		schemahcl.NewTypeSpec(TypeLine),
		schemahcl.NewTypeSpec(TypeLseg),
		schemahcl.NewTypeSpec(TypeBox),
		schemahcl.NewTypeSpec(TypePath),
		schemahcl.NewTypeSpec(TypePoint),
		schemahcl.NewTypeSpec(TypePolygon),
		schemahcl.NewTypeSpec(TypeDate),
		schemahcl.NewTypeSpec(TypeTime, schemahcl.WithAttributes(precisionTypeAttr()), formatTime()),
		schemahcl.NewTypeSpec(TypeTimeTZ, schemahcl.WithAttributes(precisionTypeAttr()), formatTime()),
		schemahcl.NewTypeSpec(TypeTimestampTZ, schemahcl.WithAttributes(precisionTypeAttr()), formatTime()),
		schemahcl.NewTypeSpec(TypeTimestamp, schemahcl.WithAttributes(precisionTypeAttr()), formatTime()),
		schemahcl.AliasTypeSpec("double_precision", TypeDouble),
		schemahcl.NewTypeSpec(TypeReal),
		schemahcl.NewTypeSpec(TypeFloat, schemahcl.WithAttributes(precisionTypeAttr())),
		schemahcl.NewTypeSpec(TypeFloat8),
		schemahcl.NewTypeSpec(TypeFloat4),
		schemahcl.NewTypeSpec(TypeNumeric, schemahcl.WithAttributes(precisionTypeAttr(), &schemahcl.TypeAttr{Name: "scale", Kind: reflect.Int, Required: false})),
		schemahcl.NewTypeSpec(TypeDecimal, schemahcl.WithAttributes(precisionTypeAttr(), &schemahcl.TypeAttr{Name: "scale", Kind: reflect.Int, Required: false})),
		schemahcl.NewTypeSpec(TypeSmallSerial),
		schemahcl.NewTypeSpec(TypeSerial),
		schemahcl.NewTypeSpec(TypeBigSerial),
		schemahcl.NewTypeSpec(TypeSerial2),
		schemahcl.NewTypeSpec(TypeSerial4),
		schemahcl.NewTypeSpec(TypeSerial8),
		schemahcl.NewTypeSpec(TypeXML),
		schemahcl.NewTypeSpec(TypeJSON),
		schemahcl.NewTypeSpec(TypeJSONB),
		schemahcl.NewTypeSpec(TypeUUID),
		schemahcl.NewTypeSpec(TypeMoney),
		schemahcl.NewTypeSpec("hstore"),
		schemahcl.NewTypeSpec("sql", schemahcl.WithAttributes(&schemahcl.TypeAttr{Name: "def", Required: true, Kind: reflect.String})),
	),
	schemahcl.WithSpecs(func() (specs []*schemahcl.TypeSpec) {
		opts := []schemahcl.TypeSpecOption{
			schemahcl.WithToSpec(func(t schema.Type) (*schemahcl.Type, error) {
				i, ok := t.(*IntervalType)
				if !ok {
					return nil, fmt.Errorf("postgres: unexpected interval type %T", t)
				}
				spec := &schemahcl.Type{T: TypeInterval}
				if i.F != "" {
					spec.T = specutil.Var(strings.ToLower(i.F))
				}
				if p := i.Precision; p != nil && *p != defaultTimePrecision {
					spec.Attrs = []*schemahcl.Attr{specutil.IntAttr("precision", *p)}
				}
				return spec, nil
			}),
			schemahcl.WithFromSpec(func(t *schemahcl.Type) (schema.Type, error) {
				i := &IntervalType{T: TypeInterval}
				if t.T != TypeInterval {
					i.F = specutil.FromVar(t.T)
				}
				if a, ok := attr(t, "precision"); ok {
					p, err := a.Int()
					if err != nil {
						return nil, fmt.Errorf(`postgres: parsing attribute "precision": %w`, err)
					}
					if p != defaultTimePrecision {
						i.Precision = &p
					}
				}
				return i, nil
			}),
		}
		for _, f := range []string{"interval", "second", "day to second", "hour to second", "minute to second"} {
			specs = append(specs, schemahcl.NewTypeSpec(specutil.Var(f), append(opts, schemahcl.WithAttributes(precisionTypeAttr()))...))
		}
		for _, f := range []string{"year", "month", "day", "hour", "minute", "year to month", "day to hour", "day to minute", "hour to minute"} {
			specs = append(specs, schemahcl.NewTypeSpec(specutil.Var(f), opts...))
		}
		return specs
	}()...),
)

TypeRegistry contains the supported TypeSpecs for the Postgres driver.

Functions

func FormatType added in v0.2.0 

func FormatType(t schema.Type) (string, error)

FormatType converts schema type to its column form in the database. An error is returned if the type cannot be recognized.

func MarshalSpec 

func MarshalSpec(v any, marshaler schemahcl.Marshaler) ([]byte, error)

MarshalSpec marshals v into an Atlas DDL document using a schemahcl.Marshaler.

func Open 

func Open(db schema.ExecQuerier) (migrate.Driver, error)

Open opens a new PostgreSQL driver.

func ParseType added in v0.3.1 

func ParseType(typ string) (schema.Type, error)

ParseType returns the schema.Type value represented by the given raw type. The raw value is expected to follow the format in PostgreSQL information schema or as an input for the CREATE TABLE statement.

Types

type ArrayType 

type ArrayType struct {
	schema.Type        // Underlying items type (e.g. varchar(255)).
	T           string // Formatted type (e.g. int[]).
}

ArrayType defines an array type. https://postgresql.org/docs/current/arrays.html

type BitType 

type BitType struct {
	schema.Type
	T   string
	Len int64
}

BitType defines a bit type. https://postgresql.org/docs/current/datatype-bit.html

type CType 

type CType struct {
	schema.Attr
	V string
}

CType describes the character classification setting (LC_CTYPE).

type CheckColumns added in v0.2.0 

type CheckColumns struct {
	schema.Attr
	Columns []string
}

CheckColumns attribute hold the column named used by the CHECK constraints. This attribute is added on inspection for internal usage and has no meaning on migration.

type ConType 

type ConType struct {
	schema.Attr
	T string // c, f, p, u, t, x.
}

ConType describes constraint type. https://postgresql.org/docs/current/catalog-pg-constraint.html

func (ConType) IsUnique added in v0.4.3 

func (c ConType) IsUnique() bool

IsUnique reports if the type is unique constraint.

type CurrencyType 

type CurrencyType struct {
	schema.Type
	T string
}

A CurrencyType defines a currency type.

type Driver 

type Driver struct {
	schema.Differ
	schema.Inspector
	migrate.PlanApplier
	// contains filtered or unexported fields
}

Driver represents a PostgreSQL driver for introspecting database schemas, generating diff between schema elements and apply migrations changes.

func (*Driver) CheckClean added in v0.6.0 

func (d *Driver) CheckClean(ctx context.Context, revT *migrate.TableIdent) error

CheckClean implements migrate.CleanChecker.

func (*Driver) Lock added in v0.3.8 

func (d *Driver) Lock(ctx context.Context, name string, timeout time.Duration) (schema.UnlockFunc, error)

Lock implements the schema.Locker interface.

func (*Driver) NormalizeRealm added in v0.3.7 

func (d *Driver) NormalizeRealm(ctx context.Context, r *schema.Realm) (*schema.Realm, error)

NormalizeRealm returns the normal representation of the given database.

func (*Driver) NormalizeSchema added in v0.3.7 

func (d *Driver) NormalizeSchema(ctx context.Context, s *schema.Schema) (*schema.Schema, error)

NormalizeSchema returns the normal representation of the given database.

func (*Driver) Snapshot added in v0.5.0 

func (d *Driver) Snapshot(ctx context.Context) (migrate.RestoreFunc, error)

Snapshot implements migrate.Snapshoter.

type Enum added in v0.3.1 

type Enum struct {
	Name   string         `spec:",name"`
	Schema *schemahcl.Ref `spec:"schema"`
	Values []string       `spec:"values"`
	schemahcl.DefaultExtension
}

Enum holds a specification for an enum, that can be referenced as a column type.

type Identity 

type Identity struct {
	schema.Attr
	Generation string // ALWAYS, BY DEFAULT.
	Sequence   *Sequence
}

Identity defines an identity column.

type IndexColumnProperty 

type IndexColumnProperty struct {
	schema.Attr
	// NullsFirst defaults to true for DESC indexes.
	NullsFirst bool
	// NullsLast defaults to true for ASC indexes.
	NullsLast bool
}

IndexColumnProperty describes an index column property. https://postgresql.org/docs/current/functions-info.html#FUNCTIONS-INFO-INDEX-COLUMN-PROPS

type IndexPredicate 

type IndexPredicate struct {
	schema.Attr
	P string
}

IndexPredicate describes a partial index predicate. https://postgresql.org/docs/current/catalog-pg-index.html

type IndexStorageParams added in v0.4.0 

type IndexStorageParams struct {
	schema.Attr
	// AutoSummarize defines the authsummarize storage parameter.
	AutoSummarize bool
	// PagesPerRange defines pages_per_range storage
	// parameter for BRIN indexes. Defaults to 128.
	PagesPerRange int64
}

IndexStorageParams describes index storage parameters add with the WITH clause. https://postgresql.org/docs/current/sql-createindex.html#SQL-CREATEINDEX-STORAGE-PARAMETERS

type IndexType 

type IndexType struct {
	schema.Attr
	T string // BTREE, BRIN, HASH, GiST, SP-GiST, GIN.
}

IndexType represents an index type. https://postgresql.org/docs/current/indexes-types.html

type IntervalType added in v0.4.3 

type IntervalType struct {
	schema.Type
	T         string // Type name.
	F         string // Optional field. YEAR, MONTH, ..., MINUTE TO SECOND.
	Precision *int   // Optional precision.
}

IntervalType defines an interval type. https://postgresql.org/docs/current/datatype-datetime.html

type NetworkType 

type NetworkType struct {
	schema.Type
	T   string
	Len int64
}

A NetworkType defines a network type. https://postgresql.org/docs/current/datatype-net-types.html

type NoInherit added in v0.2.0 

type NoInherit struct {
	schema.Attr
}

NoInherit attribute defines the NO INHERIT flag for CHECK constraint. https://postgresql.org/docs/current/catalog-pg-constraint.html

type Partition added in v0.3.8 

type Partition struct {
	schema.Attr
	// T defines the type/strategy of the partition.
	// Can be one of: RANGE, LIST, HASH.
	T string
	// Partition parts. The additional attributes
	// on each part can be used to control collation.
	Parts []*PartitionPart
	// contains filtered or unexported fields
}

Partition defines the spec of a partitioned table.

type PartitionPart added in v0.3.8 

type PartitionPart struct {
	X     schema.Expr
	C     *schema.Column
	Attrs []schema.Attr
}

An PartitionPart represents an index part that can be either an expression or a column.

type Sequence added in v0.2.0 

type Sequence struct {
	Start, Increment int64
	// Last sequence value written to disk.
	// https://postgresql.org/docs/current/view-pg-sequences.html.
	Last int64
}

Sequence defines (the supported) sequence options. https://postgresql.org/docs/current/sql-createsequence.html

type SerialType 

type SerialType struct {
	schema.Type
	T         string
	Precision int
	// SequenceName holds the inspected sequence name attached to the column.
	// It defaults to <Table>_<Column>_seq when the column is created, but may
	// be different in case the table or the column was renamed.
	SequenceName string
}

A SerialType defines a serial type. https://postgresql.org/docs/current/datatype-numeric.html#DATATYPE-SERIAL

func (*SerialType) IntegerType added in v0.6.0 

func (s *SerialType) IntegerType() *schema.IntegerType

IntegerType returns the underlying integer type this serial type represents.

func (*SerialType) SetType added in v0.6.0 

func (s *SerialType) SetType(t *schema.IntegerType)

SetType sets the serial type from the given integer type.

type UUIDType 

type UUIDType struct {
	schema.Type
	T string
}

A UUIDType defines a UUID type.

type UserDefinedType 

type UserDefinedType struct {
	schema.Type
	T string
}

UserDefinedType defines a user-defined type attribute.

type XMLType 

type XMLType struct {
	schema.Type
	T string
}

A XMLType defines an XML type.

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