storj/satellite/satellitedb/migrate.go

// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.

package satellitedb

import (
	"database/sql"
	"strconv"

	"github.com/golang/protobuf/proto"
	"github.com/zeebo/errs"
	"go.uber.org/zap"

	"storj.io/storj/internal/dbutil/pgutil"
	"storj.io/storj/internal/migrate"
	"storj.io/storj/pkg/pb"
	"storj.io/storj/satellite/console"
	"storj.io/storj/satellite/satellitedb/pbold"
)

// ErrMigrate is for tracking migration errors
var ErrMigrate = errs.Class("migrate")

// CreateTables is a method for creating all tables for database
func (db *DB) CreateTables() error {
	switch db.driver {
	case "postgres":
		schema, err := pgutil.ParseSchemaFromConnstr(db.source)
		if err != nil {
			return errs.New("error parsing schema: %+v", err)
		}
		if schema != "" {
			err = db.CreateSchema(schema)
			if err != nil {
				return errs.New("error creating schema: %+v", err)
			}
		}
		migration := db.PostgresMigration()
		return migration.Run(db.log.Named("migrate"), db.db)
	default:
		return migrate.Create("database", db.db)
	}
}

// PostgresMigration returns steps needed for migrating postgres database.
func (db *DB) PostgresMigration() *migrate.Migration {
	return &migrate.Migration{
		Table: "versions",
		Steps: []*migrate.Step{
			{
				// some databases may have already this done, although the version may not match
				Description: "Initial setup",
				Version:     0,
				Action: migrate.SQL{
					`CREATE TABLE IF NOT EXISTS accounting_raws (
						id bigserial NOT NULL,
						node_id bytea NOT NULL,
						interval_end_time timestamp with time zone NOT NULL,
						data_total double precision NOT NULL,
						data_type integer NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE TABLE IF NOT EXISTS accounting_rollups (
						id bigserial NOT NULL,
						node_id bytea NOT NULL,
						start_time timestamp with time zone NOT NULL,
						put_total bigint NOT NULL,
						get_total bigint NOT NULL,
						get_audit_total bigint NOT NULL,
						get_repair_total bigint NOT NULL,
						put_repair_total bigint NOT NULL,
						at_rest_total double precision NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE TABLE IF NOT EXISTS accounting_timestamps (
						name text NOT NULL,
						value timestamp with time zone NOT NULL,
						PRIMARY KEY ( name )
					)`,
					`CREATE TABLE IF NOT EXISTS bwagreements (
						serialnum text NOT NULL,
						data bytea NOT NULL,
						storage_node bytea NOT NULL,
						action bigint NOT NULL,
						total bigint NOT NULL,
						created_at timestamp with time zone NOT NULL,
						expires_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( serialnum )
					)`,
					`CREATE TABLE IF NOT EXISTS injuredsegments (
						id bigserial NOT NULL,
						info bytea NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE TABLE IF NOT EXISTS irreparabledbs (
						segmentpath bytea NOT NULL,
						segmentdetail bytea NOT NULL,
						pieces_lost_count bigint NOT NULL,
						seg_damaged_unix_sec bigint NOT NULL,
						repair_attempt_count bigint NOT NULL,
						PRIMARY KEY ( segmentpath )
					)`,
					`CREATE TABLE IF NOT EXISTS nodes (
						id bytea NOT NULL,
						audit_success_count bigint NOT NULL,
						total_audit_count bigint NOT NULL,
						audit_success_ratio double precision NOT NULL,
						uptime_success_count bigint NOT NULL,
						total_uptime_count bigint NOT NULL,
						uptime_ratio double precision NOT NULL,
						created_at timestamp with time zone NOT NULL,
						updated_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE TABLE IF NOT EXISTS overlay_cache_nodes (
						node_id bytea NOT NULL,
						node_type integer NOT NULL,
						address text NOT NULL,
						protocol integer NOT NULL,
						operator_email text NOT NULL,
						operator_wallet text NOT NULL,
						free_bandwidth bigint NOT NULL,
						free_disk bigint NOT NULL,
						latency_90 bigint NOT NULL,
						audit_success_ratio double precision NOT NULL,
						audit_uptime_ratio double precision NOT NULL,
						audit_count bigint NOT NULL,
						audit_success_count bigint NOT NULL,
						uptime_count bigint NOT NULL,
						uptime_success_count bigint NOT NULL,
						PRIMARY KEY ( node_id ),
						UNIQUE ( node_id )
					)`,
					`CREATE TABLE IF NOT EXISTS projects (
						id bytea NOT NULL,
						name text NOT NULL,
						description text NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE TABLE IF NOT EXISTS users (
						id bytea NOT NULL,
						first_name text NOT NULL,
						last_name text NOT NULL,
						email text NOT NULL,
						password_hash bytea NOT NULL,
						status integer NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE TABLE IF NOT EXISTS api_keys (
						id bytea NOT NULL,
						project_id bytea NOT NULL REFERENCES projects( id ) ON DELETE CASCADE,
						key bytea NOT NULL,
						name text NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id ),
						UNIQUE ( key ),
						UNIQUE ( name, project_id )
					)`,
					`CREATE TABLE IF NOT EXISTS project_members (
						member_id bytea NOT NULL REFERENCES users( id ) ON DELETE CASCADE,
						project_id bytea NOT NULL REFERENCES projects( id ) ON DELETE CASCADE,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( member_id, project_id )
					)`,
				},
			},
			{
				// some databases may have already this done, although the version may not match
				Description: "Adjust table naming",
				Version:     1,
				Action: migrate.Func(func(log *zap.Logger, db migrate.DB, tx *sql.Tx) error {
					hasStorageNodeID, err := postgresHasColumn(tx, "bwagreements", "storage_node_id")
					if err != nil {
						return ErrMigrate.Wrap(err)
					}
					if !hasStorageNodeID {
						// - storage_node bytea NOT NULL,
						// + storage_node_id bytea NOT NULL,
						_, err := tx.Exec(`ALTER TABLE bwagreements RENAME COLUMN storage_node TO storage_node_id;`)
						if err != nil {
							return ErrMigrate.Wrap(err)
						}
					}

					hasUplinkID, err := postgresHasColumn(tx, "bwagreements", "uplink_id")
					if err != nil {
						return ErrMigrate.Wrap(err)
					}
					if !hasUplinkID {
						// + uplink_id bytea NOT NULL,
						_, err := tx.Exec(`
							ALTER TABLE bwagreements ADD COLUMN uplink_id BYTEA;
						`)
						if err != nil {
							return ErrMigrate.Wrap(err)
						}

						err = func() error {
							_, err = tx.Exec(`
							DECLARE bwagreements_cursor CURSOR FOR
							SELECT serialnum, data FROM bwagreements
							FOR UPDATE`)
							if err != nil {
								return ErrMigrate.Wrap(err)
							}
							defer func() {
								_, closeErr := tx.Exec(`CLOSE bwagreements_cursor`)
								err = errs.Combine(err, closeErr)
							}()

							for {
								var serialnum, data []byte

								err := tx.QueryRow(`FETCH NEXT FROM bwagreements_cursor`).Scan(&serialnum, &data)
								if err != nil {
									if err == sql.ErrNoRows {
										break
									}
									return ErrMigrate.Wrap(err)
								}

								var rba pbold.Order
								if err := proto.Unmarshal(data, &rba); err != nil {
									return ErrMigrate.Wrap(err)
								}

								_, err = tx.Exec(`
									UPDATE bwagreements SET uplink_id = $1
									WHERE CURRENT OF bwagreements_cursor`, rba.PayerAllocation.UplinkId.Bytes())
								if err != nil {
									return ErrMigrate.Wrap(err)
								}
							}
							return nil
						}()
						if err != nil {
							return err
						}

						_, err = tx.Exec(`
							ALTER TABLE bwagreements ALTER COLUMN uplink_id SET NOT NULL;
							ALTER TABLE bwagreements DROP COLUMN data;
						`)
						if err != nil {
							return ErrMigrate.Wrap(err)
						}
					}
					return nil
				}),
			},
			{
				// some databases may have already this done, although the version may not match
				Description: "Remove bucket infos",
				Version:     2,
				Action: migrate.SQL{
					`DROP TABLE IF EXISTS bucket_infos CASCADE`,
				},
			},
			{
				// some databases may have already this done, although the version may not match
				Description: "Add certificates table",
				Version:     3,
				Action: migrate.SQL{
					`CREATE TABLE IF NOT EXISTS certRecords (
						publickey bytea NOT NULL,
						id bytea NOT NULL,
						update_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id )
					)`,
				},
			},
			{
				// some databases may have already this done, although the version may not match
				Description: "Adjust users table",
				Version:     4,
				Action: migrate.Func(func(log *zap.Logger, db migrate.DB, tx *sql.Tx) error {
					// - email text,
					// + email text NOT NULL,
					emailNullable, err := postgresColumnNullability(tx, "users", "email")
					if err != nil {
						return ErrMigrate.Wrap(err)
					}
					if emailNullable {
						_, err := tx.Exec(`
							ALTER TABLE users ALTER COLUMN email SET NOT NULL;
						`)
						if err != nil {
							return ErrMigrate.Wrap(err)
						}
					}

					// + status integer NOT NULL,
					hasStatus, err := postgresHasColumn(tx, "users", "status")
					if err != nil {
						return ErrMigrate.Wrap(err)
					}
					if !hasStatus {
						_, err := tx.Exec(`
							ALTER TABLE users ADD COLUMN status INTEGER;
							UPDATE users SET status = ` + strconv.Itoa(int(console.Active)) + `;
							ALTER TABLE users ALTER COLUMN status SET NOT NULL;
						`)
						if err != nil {
							return ErrMigrate.Wrap(err)
						}
					}

					// - UNIQUE ( email )
					_, err = tx.Exec(`
						ALTER TABLE users DROP CONSTRAINT IF EXISTS users_email_key;
					`)
					if err != nil {
						return ErrMigrate.Wrap(err)
					}

					return nil
				}),
			},
			{
				Description: "Add wallet column",
				Version:     5,
				Action: migrate.SQL{
					`ALTER TABLE nodes ADD wallet TEXT;
					ALTER TABLE nodes ADD email TEXT;
					UPDATE nodes SET wallet = '';
					UPDATE nodes SET email = '';
					ALTER TABLE nodes ALTER COLUMN wallet SET NOT NULL;
					ALTER TABLE nodes ALTER COLUMN email SET NOT NULL;`,
				},
			},
			{
				Description: "Add bucket usage rollup table",
				Version:     6,
				Action: migrate.SQL{
					`CREATE TABLE bucket_usages (
  						id bytea NOT NULL,
  						bucket_id bytea NOT NULL,
  						rollup_end_time timestamp with time zone NOT NULL,
  						remote_stored_data bigint NOT NULL,
  						inline_stored_data bigint NOT NULL,
  						remote_segments integer NOT NULL,
  						inline_segments integer NOT NULL,
  						objects integer NOT NULL,
  						metadata_size bigint NOT NULL,
  						repair_egress bigint NOT NULL,
  						get_egress bigint NOT NULL,
  						audit_egress bigint NOT NULL,
  						PRIMARY KEY ( id ),
						UNIQUE ( rollup_end_time, bucket_id )
					)`,
				},
			},
			{
				Description: "Add index on bwagreements",
				Version:     7,
				Action: migrate.SQL{
					`CREATE INDEX IF NOT EXISTS bwa_created_at ON bwagreements (created_at)`,
				},
			},
			{
				Description: "Add registration_tokens table",
				Version:     8,
				Action: migrate.SQL{
					`CREATE TABLE registration_tokens (
                         secret bytea NOT NULL,
						 owner_id bytea,
						 project_limit integer NOT NULL,
						 created_at timestamp with time zone NOT NULL,
						 PRIMARY KEY ( secret ),
						 UNIQUE ( owner_id )
					)`,
				},
			},
			{
				Description: "Add new tables for tracking used serials, bandwidth and storage",
				Version:     9,
				Action: migrate.SQL{
					`CREATE TABLE serial_numbers (
						id serial NOT NULL,
						serial_number bytea NOT NULL,
						bucket_id bytea NOT NULL,
						expires_at timestamp NOT NULL,
						PRIMARY KEY ( id )
					)`,
					`CREATE INDEX serial_numbers_expires_at_index ON serial_numbers ( expires_at )`,
					`CREATE UNIQUE INDEX serial_number_index ON serial_numbers ( serial_number )`,
					`CREATE TABLE used_serials (
						serial_number_id integer NOT NULL REFERENCES serial_numbers( id ) ON DELETE CASCADE,
						storage_node_id bytea NOT NULL,
						PRIMARY KEY ( serial_number_id, storage_node_id )
					)`,
					`CREATE TABLE storagenode_bandwidth_rollups (
						storagenode_id bytea NOT NULL,
						interval_start timestamp NOT NULL,
						interval_seconds integer NOT NULL,
						action integer NOT NULL,
						allocated bigint NOT NULL,
						settled bigint NOT NULL,
						PRIMARY KEY ( storagenode_id, interval_start, action )
					)`,
					`CREATE INDEX storagenode_id_interval_start_interval_seconds_index ON storagenode_bandwidth_rollups (
						storagenode_id,
						interval_start,
						interval_seconds
					)`,
					`CREATE TABLE storagenode_storage_rollups (
						storagenode_id bytea NOT NULL,
						interval_start timestamp NOT NULL,
						interval_seconds integer NOT NULL,
						total bigint NOT NULL,
						PRIMARY KEY ( storagenode_id, interval_start )
					)`,
					`CREATE TABLE bucket_bandwidth_rollups (
						bucket_id bytea NOT NULL,
						interval_start timestamp NOT NULL,
						interval_seconds integer NOT NULL,
						action integer NOT NULL,
						inline bigint NOT NULL,
						allocated bigint NOT NULL,
						settled bigint NOT NULL,
						PRIMARY KEY ( bucket_id, interval_start, action )
					)`,
					`CREATE INDEX bucket_id_interval_start_interval_seconds_index ON bucket_bandwidth_rollups (
						bucket_id,
						interval_start,
						interval_seconds
					)`,
					`CREATE TABLE bucket_storage_rollups (
						bucket_id bytea NOT NULL,
						interval_start timestamp NOT NULL,
						interval_seconds integer NOT NULL,
						inline bigint NOT NULL,
						remote bigint NOT NULL,
						PRIMARY KEY ( bucket_id, interval_start )
					)`,
					`ALTER TABLE bucket_usages DROP CONSTRAINT bucket_usages_rollup_end_time_bucket_id_key`,
					`CREATE UNIQUE INDEX bucket_id_rollup_end_time_index ON bucket_usages (
						bucket_id,
						rollup_end_time )`,
				},
			},
			{
				Description: "users first_name to full_name, last_name to short_name",
				Version:     10,
				Action: migrate.SQL{
					`ALTER TABLE users RENAME COLUMN first_name TO full_name;
					ALTER TABLE users ALTER COLUMN last_name DROP NOT NULL;
					ALTER TABLE users RENAME COLUMN last_name TO short_name;`,
				},
			},
			{
				Description: "drops interval seconds from storage_rollups, renames x_storage_rollups to x_storage_tallies, adds fields to bucket_storage_tallies",
				Version:     11,
				Action: migrate.SQL{
					`ALTER TABLE storagenode_storage_rollups RENAME TO storagenode_storage_tallies`,
					`ALTER TABLE bucket_storage_rollups RENAME TO bucket_storage_tallies`,

					`ALTER TABLE storagenode_storage_tallies DROP COLUMN interval_seconds`,
					`ALTER TABLE bucket_storage_tallies DROP COLUMN interval_seconds`,

					`ALTER TABLE bucket_storage_tallies ADD remote_segments_count integer;
					UPDATE bucket_storage_tallies SET remote_segments_count = 0;
					ALTER TABLE bucket_storage_tallies ALTER COLUMN remote_segments_count SET NOT NULL;`,

					`ALTER TABLE bucket_storage_tallies ADD inline_segments_count integer;
					UPDATE bucket_storage_tallies SET inline_segments_count = 0;
					ALTER TABLE bucket_storage_tallies ALTER COLUMN inline_segments_count SET NOT NULL;`,

					`ALTER TABLE bucket_storage_tallies ADD object_count integer;
					UPDATE bucket_storage_tallies SET object_count = 0;
					ALTER TABLE bucket_storage_tallies ALTER COLUMN object_count SET NOT NULL;`,

					`ALTER TABLE bucket_storage_tallies ADD metadata_size bigint;
					UPDATE bucket_storage_tallies SET metadata_size = 0;
					ALTER TABLE bucket_storage_tallies ALTER COLUMN metadata_size SET NOT NULL;`,
				},
			},
			{
				Description: "Merge overlay_cache_nodes into nodes table",
				Version:     12,
				Action: migrate.SQL{
					// Add the new columns to the nodes table
					`ALTER TABLE nodes ADD address TEXT NOT NULL DEFAULT '';
					 ALTER TABLE nodes ADD protocol INTEGER NOT NULL DEFAULT 0;
					 ALTER TABLE nodes ADD type INTEGER NOT NULL DEFAULT 2;
					 ALTER TABLE nodes ADD free_bandwidth BIGINT NOT NULL DEFAULT -1;
					 ALTER TABLE nodes ADD free_disk BIGINT NOT NULL DEFAULT -1;
					 ALTER TABLE nodes ADD latency_90 BIGINT NOT NULL DEFAULT 0;
					 ALTER TABLE nodes ADD last_contact_success TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT 'epoch';
					 ALTER TABLE nodes ADD last_contact_failure TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT 'epoch';`,
					// Copy data from overlay_cache_nodes to nodes
					`UPDATE nodes
					 SET address=overlay.address,
					     protocol=overlay.protocol,
						 type=overlay.node_type,
						 free_bandwidth=overlay.free_bandwidth,
						 free_disk=overlay.free_disk,
						 latency_90=overlay.latency_90
					 FROM (SELECT node_id, node_type, address, protocol, free_bandwidth, free_disk, latency_90
						   FROM overlay_cache_nodes) AS overlay
					 WHERE nodes.id=overlay.node_id;`,
					// Delete the overlay cache_nodes table
					`DROP TABLE overlay_cache_nodes CASCADE;`,
				},
			},
			{
				Description: "Change bucket_id to bucket_name and project_id",
				Version:     13,
				Action: migrate.SQL{
					// Modify columns: bucket_id --> bucket_name + project_id for table bucket_storage_tallies
					`ALTER TABLE bucket_storage_tallies ADD project_id bytea;`,
					`UPDATE bucket_storage_tallies SET project_id=SUBSTRING(bucket_id FROM 1 FOR 16);`,
					`ALTER TABLE bucket_storage_tallies ALTER COLUMN project_id SET NOT NULL;`,
					`ALTER TABLE bucket_storage_tallies RENAME COLUMN bucket_id TO bucket_name;`,
					`UPDATE bucket_storage_tallies SET bucket_name=SUBSTRING(bucket_name from 18);`,

					// Update the primary key for bucket_storage_tallies
					`ALTER TABLE bucket_storage_tallies DROP CONSTRAINT bucket_storage_rollups_pkey;`,
					`ALTER TABLE bucket_storage_tallies ADD CONSTRAINT bucket_storage_tallies_pk PRIMARY KEY (bucket_name, project_id, interval_start);`,

					// Modify columns: bucket_id --> bucket_name + project_id for table bucket_bandwidth_rollups
					`ALTER TABLE bucket_bandwidth_rollups ADD project_id bytea;`,
					`UPDATE bucket_bandwidth_rollups SET project_id=SUBSTRING(bucket_id FROM 1 FOR 16);`,
					`ALTER TABLE bucket_bandwidth_rollups ALTER COLUMN project_id SET NOT NULL;`,
					`ALTER TABLE bucket_bandwidth_rollups RENAME COLUMN bucket_id TO bucket_name;`,
					`UPDATE bucket_bandwidth_rollups SET bucket_name=SUBSTRING(bucket_name from 18);`,

					// Update index for bucket_bandwidth_rollups
					`DROP INDEX IF EXISTS bucket_id_interval_start_interval_seconds_index;`,
					`CREATE INDEX bucket_name_project_id_interval_start_interval_seconds ON bucket_bandwidth_rollups (
						bucket_name,
						project_id,
						interval_start,
						interval_seconds
					);`,

					// Update the primary key for bucket_bandwidth_rollups
					`ALTER TABLE bucket_bandwidth_rollups DROP CONSTRAINT bucket_bandwidth_rollups_pkey;`,
					`ALTER TABLE bucket_bandwidth_rollups ADD CONSTRAINT bucket_bandwidth_rollups_pk PRIMARY KEY (bucket_name, project_id, interval_start, action);`,
				},
			},
			{
				Description: "Add new Columns to store version information",
				Version:     14,
				Action: migrate.SQL{
					`ALTER TABLE nodes ADD major bigint NOT NULL DEFAULT 0;
					ALTER TABLE nodes ADD minor bigint NOT NULL DEFAULT 1;
					ALTER TABLE nodes ADD patch bigint NOT NULL DEFAULT 0;
					ALTER TABLE nodes ADD hash TEXT NOT NULL DEFAULT '';
					ALTER TABLE nodes ADD timestamp TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT 'epoch';
					ALTER TABLE nodes ADD release bool NOT NULL DEFAULT FALSE;`,
				},
			},
			{
				Description: "Default Node Type should be invalid",
				Version:     15,
				Action: migrate.SQL{
					`ALTER TABLE nodes ALTER COLUMN type SET DEFAULT 0;`,
				},
			},
			{
				Description: "Add path to injuredsegment to prevent duplicates",
				Version:     16,
				Action: migrate.Func(func(log *zap.Logger, db migrate.DB, tx *sql.Tx) error {
					_, err := tx.Exec(`
						ALTER TABLE injuredsegments ADD path text;
						ALTER TABLE injuredsegments RENAME COLUMN info TO data;
						ALTER TABLE injuredsegments ADD attempted timestamp;
						ALTER TABLE injuredsegments DROP CONSTRAINT IF EXISTS id_pkey;`)
					if err != nil {
						return ErrMigrate.Wrap(err)
					}
					// add 'path' using a cursor
					err = func() error {
						_, err = tx.Exec(`DECLARE injured_cursor CURSOR FOR SELECT data FROM injuredsegments FOR UPDATE`)
						if err != nil {
							return ErrMigrate.Wrap(err)
						}
						defer func() {
							_, closeErr := tx.Exec(`CLOSE injured_cursor`)
							err = errs.Combine(err, closeErr)
						}()
						for {
							var seg pb.InjuredSegment
							err := tx.QueryRow(`FETCH NEXT FROM injured_cursor`).Scan(&seg)
							if err != nil {
								if err == sql.ErrNoRows {
									break
								}
								return ErrMigrate.Wrap(err)
							}
							_, err = tx.Exec(`UPDATE injuredsegments SET path = $1 WHERE CURRENT OF injured_cursor`, seg.Path)
							if err != nil {
								return ErrMigrate.Wrap(err)
							}
						}
						return nil
					}()
					if err != nil {
						return err
					}
					// keep changing
					_, err = tx.Exec(`
						DELETE FROM injuredsegments a USING injuredsegments b WHERE a.id < b.id AND a.path = b.path;
						ALTER TABLE injuredsegments DROP COLUMN id;
						ALTER TABLE injuredsegments ALTER COLUMN path SET NOT NULL;
						ALTER TABLE injuredsegments ADD PRIMARY KEY (path);`)
					if err != nil {
						return ErrMigrate.Wrap(err)
					}
					return nil
				}),
			},
			{
				Description: "Fix audit and uptime ratios for new nodes",
				Version:     17,
				Action: migrate.SQL{`
					UPDATE nodes SET audit_success_ratio = 1 WHERE total_audit_count = 0;
					UPDATE nodes SET uptime_ratio = 1 WHERE total_uptime_count = 0;`,
				},
			},
			{
				Description: "Drops storagenode_storage_tally table, Renames accounting_raws to storagenode_storage_tally, and Drops data_type and created_at columns",
				Version:     18,
				Action: migrate.SQL{
					`DROP TABLE storagenode_storage_tallies CASCADE`,
					`ALTER TABLE accounting_raws RENAME TO storagenode_storage_tallies`,
					`ALTER TABLE storagenode_storage_tallies DROP COLUMN data_type`,
					`ALTER TABLE storagenode_storage_tallies DROP COLUMN created_at`,
				},
			},
			{
				Description: "Added new table to store reset password tokens",
				Version:     19,
				Action: migrate.SQL{`
					CREATE TABLE reset_password_tokens (
						secret bytea NOT NULL,
						owner_id bytea NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( secret ),
						UNIQUE ( owner_id )
					);`,
				},
			},
			{
				Description: "Adds pending_audits table, adds 'contained' column to nodes table",
				Version:     20,
				Action: migrate.SQL{
					`ALTER TABLE nodes ADD contained boolean;
					UPDATE nodes SET contained = false;
					ALTER TABLE nodes ALTER COLUMN contained SET NOT NULL;`,

					`CREATE TABLE pending_audits (
						node_id bytea NOT NULL,
						piece_id bytea NOT NULL,
						stripe_index bigint NOT NULL,
						share_size bigint NOT NULL,
						expected_share_hash bytea NOT NULL,
						reverify_count bigint NOT NULL,
						PRIMARY KEY ( node_id )
					);`,
				},
			},
			{
				Description: "Add last_ip column and index",
				Version:     21,
				Action: migrate.SQL{
					`ALTER TABLE nodes ADD last_ip TEXT;
					UPDATE nodes SET last_ip = '';
					ALTER TABLE nodes ALTER COLUMN last_ip SET NOT NULL;
					CREATE INDEX IF NOT EXISTS node_last_ip ON nodes (last_ip)`,
				},
			},
			{
				Description: "Create new tables for free credits program",
				Version:     22,
				Action: migrate.SQL{`
					CREATE TABLE offers (
						id serial NOT NULL,
						name text NOT NULL,
						description text NOT NULL,
						type integer NOT NULL,
						credit_in_cents integer NOT NULL,
						award_credit_duration_days integer NOT NULL,
						invitee_credit_duration_days integer NOT NULL,
						redeemable_cap integer NOT NULL,
						num_redeemed integer NOT NULL,
						expires_at timestamp with time zone,
						created_at timestamp with time zone NOT NULL,
						status integer NOT NULL,
						PRIMARY KEY ( id )
					);`,
				},
			},
			{
				Description: "Drops and recreates api key table to handle macaroons and adds revocation table",
				Version:     23,
				Action: migrate.SQL{
					`DROP TABLE api_keys CASCADE`,
					`CREATE TABLE api_keys (
						id bytea NOT NULL,
						project_id bytea NOT NULL REFERENCES projects( id ) ON DELETE CASCADE,
						head bytea NOT NULL,
						name text NOT NULL,
						secret bytea NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id ),
						UNIQUE ( head ),
						UNIQUE ( name, project_id )
					);`,
				},
			},
			{
				Description: "Add usage_limit column to projects table",
				Version:     24,
				Action: migrate.SQL{
					`ALTER TABLE projects ADD usage_limit bigint NOT NULL DEFAULT 0;`,
				},
			},
			{
				Description: "Add disqualified column to nodes table",
				Version:     25,
				Action: migrate.SQL{
					`ALTER TABLE nodes ADD disqualified boolean NOT NULL DEFAULT false;`,
				},
			},
			{
				Description: "Add invitee_credit_in_gb and award_credit_in_gb columns, delete type and credit_in_cents columns",
				Version:     26,
				Action: migrate.SQL{
					`ALTER TABLE offers DROP COLUMN credit_in_cents;`,
					`ALTER TABLE offers ADD COLUMN award_credit_in_cents integer NOT NULL DEFAULT 0;`,
					`ALTER TABLE offers ADD COLUMN invitee_credit_in_cents integer NOT NULL DEFAULT 0;`,
					`ALTER TABLE offers ALTER COLUMN expires_at SET NOT NULL;`,
				},
			},
			{
				Description: "Create value attribution table",
				Version:     27,
				Action: migrate.SQL{
					`CREATE TABLE value_attributions (
						bucket_id bytea NOT NULL,
						partner_id bytea NOT NULL,
						last_updated timestamp NOT NULL,
						PRIMARY KEY ( bucket_id )
					)`,
				},
			},
			{
				Description: "Remove agreements table",
				Version:     28,
				Action: migrate.SQL{
					`DROP TABLE bwagreements`,
				},
			},
			{
				Description: "Add userpaymentinfos, projectpaymentinfos, projectinvoicestamps",
				Version:     29,
				Action: migrate.SQL{
					`CREATE TABLE user_payments (
						user_id bytea NOT NULL REFERENCES users( id ) ON DELETE CASCADE,
						customer_id bytea NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( user_id ),
						UNIQUE ( customer_id )
					);`,
					`CREATE TABLE project_payments (
						project_id bytea NOT NULL REFERENCES projects( id ) ON DELETE CASCADE,
						payer_id bytea NOT NULL REFERENCES user_payments( user_id ) ON DELETE CASCADE,
						payment_method_id bytea NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( project_id )
					);`,
					`CREATE TABLE project_invoice_stamps (
						project_id bytea NOT NULL REFERENCES projects( id ) ON DELETE CASCADE,
						invoice_id bytea NOT NULL,
						start_date timestamp with time zone NOT NULL,
						end_date timestamp with time zone NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( project_id, start_date, end_date ),
						UNIQUE ( invoice_id )
					);`,
				},
			},
			{
				Description: "Alter value attribution table. Remove bucket_id. Add project_id and bucket_name as primary key",
				Version:     30,
				Action: migrate.SQL{
					`ALTER TABLE value_attributions DROP CONSTRAINT value_attributions_pkey;`,
					`ALTER TABLE value_attributions ADD project_id bytea;`,
					`UPDATE value_attributions SET project_id=SUBSTRING(bucket_id FROM 1 FOR 16);`,
					`ALTER TABLE value_attributions ALTER COLUMN project_id SET NOT NULL;`,
					`ALTER TABLE value_attributions RENAME COLUMN bucket_id TO bucket_name;`,
					`UPDATE value_attributions SET bucket_name=SUBSTRING(bucket_name from 18);`,
					`ALTER TABLE value_attributions ADD PRIMARY KEY (project_id, bucket_name);`,
				},
			},
			{
				Description: "Add user_credit table",
				Version:     31,
				Action: migrate.SQL{
					`CREATE TABLE user_credits (
						id serial NOT NULL,
						user_id bytea NOT NULL REFERENCES users( id ),
						offer_id integer NOT NULL REFERENCES offers( id ),
						referred_by bytea REFERENCES users( id ),
						credits_earned_in_cents integer NOT NULL,
						credits_used_in_cents integer NOT NULL,
						expires_at timestamp with time zone NOT NULL,
						created_at timestamp with time zone NOT NULL,
						PRIMARY KEY ( id )
					);`,
				},
			},
			{
				Description: "Change type of disqualified column of nodes table to timestamp",
				Version:     32,
				Action: migrate.SQL{
					`ALTER TABLE nodes
						ALTER COLUMN disqualified DROP DEFAULT,
						ALTER COLUMN disqualified DROP NOT NULL,
						ALTER COLUMN disqualified TYPE timestamp with time zone USING
							CASE disqualified
								WHEN true THEN TIMESTAMP WITH TIME ZONE '2019-06-15 00:00:00+00'
								ELSE NULL
							END`,
				},
			},
			{
				Description: "Add alpha and beta columns for reputations",
				Version:     33,
				Action: migrate.SQL{
					`ALTER TABLE nodes ADD COLUMN audit_reputation_alpha double precision NOT NULL DEFAULT 1;`,
					`ALTER TABLE nodes ADD COLUMN audit_reputation_beta double precision NOT NULL DEFAULT 0;`,
					`ALTER TABLE nodes ADD COLUMN uptime_reputation_alpha double precision NOT NULL DEFAULT 1;`,
					`ALTER TABLE nodes ADD COLUMN uptime_reputation_beta double precision NOT NULL DEFAULT 0;`,
				},
			},
			{
				Description: "Remove ratio columns from node reputations",
				Version:     34,
				Action: migrate.SQL{
					`ALTER TABLE nodes DROP COLUMN audit_success_ratio;`,
					`ALTER TABLE nodes DROP COLUMN uptime_ratio;`,
				},
			},
		},
	}
}

func postgresHasColumn(tx *sql.Tx, table, column string) (bool, error) {
	var columnName string
	err := tx.QueryRow(`
		SELECT column_name FROM information_schema.COLUMNS
			WHERE table_schema = CURRENT_SCHEMA
				AND table_name = $1
				AND column_name = $2
		`, table, column).Scan(&columnName)
	if err == sql.ErrNoRows {
		return false, nil
	}
	if err != nil {
		return false, ErrMigrate.Wrap(err)
	}

	return columnName == column, nil
}

func postgresColumnNullability(tx *sql.Tx, table, column string) (bool, error) {
	var nullability string
	err := tx.QueryRow(`
		SELECT is_nullable FROM information_schema.COLUMNS
			WHERE table_schema = CURRENT_SCHEMA
				AND table_name = $1
				AND column_name = $2
		`, table, column).Scan(&nullability)
	if err != nil {
		return false, ErrMigrate.Wrap(err)
	}
	return nullability == "YES", nil
}