fix(eventstore): precise decimal (#8527)

# Which Problems Are Solved

Float64 which was used for the event.Position field is [not precise in
go and gets rounded](https://github.com/golang/go/issues/47300). This
can lead to unprecies position tracking of events and therefore
projections especially on cockcoachdb as the position used there is a
big number.

example of a unprecies position:
exact: 1725257931223002628
float64: 1725257931223002624.000000

# How the Problems Are Solved

The float64 was replaced by
[github.com/jackc/pgx-shopspring-decimal](https://github.com/jackc/pgx-shopspring-decimal).

# Additional Changes

Correct behaviour of makefile for load tests.
Rename `latestSequence`-queries to `latestPosition`

internal/query/access_token.go

@@ -5,6 +5,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/shopspring/decimal"
 	"golang.org/x/text/language"
 
 	"github.com/zitadel/zitadel/internal/domain"
@@ -140,7 +141,7 @@ func (q *Queries) accessTokenByOIDCSessionAndTokenID(ctx context.Context, oidcSe
 
 // checkSessionNotTerminatedAfter checks if a [session.TerminateType] event (or user events leading to a session termination)
 // occurred after a certain time and will return an error if so.
-func (q *Queries) checkSessionNotTerminatedAfter(ctx context.Context, sessionID, userID string, position float64, fingerprintID string) (err error) {
+func (q *Queries) checkSessionNotTerminatedAfter(ctx context.Context, sessionID, userID string, position decimal.Decimal, fingerprintID string) (err error) {
 	ctx, span := tracing.NewSpan(ctx)
 	defer func() { span.EndWithError(err) }()
 
@@ -162,7 +163,7 @@ func (q *Queries) checkSessionNotTerminatedAfter(ctx context.Context, sessionID,
 }
 
 type sessionTerminatedModel struct {
-	position      float64
+	position      decimal.Decimal
 	sessionID     string
 	userID        string
 	fingerPrintID string
@@ -182,7 +183,7 @@ func (s *sessionTerminatedModel) AppendEvents(events ...eventstore.Event) {
 
 func (s *sessionTerminatedModel) Query() *eventstore.SearchQueryBuilder {
 	query := eventstore.NewSearchQueryBuilder(eventstore.ColumnsEvent).
-		PositionAfter(s.position).
+		PositionGreaterEqual(s.position).
 		AddQuery().
 		AggregateTypes(session.AggregateType).
 		AggregateIDs(s.sessionID).

internal/query/current_state.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	sq "github.com/Masterminds/squirrel"
+	"github.com/shopspring/decimal"
 	"github.com/zitadel/logging"
 
 	"github.com/zitadel/zitadel/internal/api/call"
@@ -26,7 +27,7 @@ type Stateful interface {
 type State struct {
 	LastRun time.Time
 
-	Position       float64
+	Position       decimal.Decimal
 	EventCreatedAt time.Time
 	AggregateID    string
 	AggregateType  eventstore.AggregateType
@@ -221,7 +222,7 @@ func prepareLatestState(ctx context.Context, db prepareDatabase) (sq.SelectBuild
 			var (
 				creationDate sql.NullTime
 				lastUpdated  sql.NullTime
-				position     sql.NullFloat64
+				position     decimal.NullDecimal
 			)
 			err := row.Scan(
 				&creationDate,
@@ -234,7 +235,7 @@ func prepareLatestState(ctx context.Context, db prepareDatabase) (sq.SelectBuild
 			return &State{
 				EventCreatedAt: creationDate.Time,
 				LastRun:        lastUpdated.Time,
-				Position:       position.Float64,
+				Position:       position.Decimal,
 			}, nil
 		}
 }
@@ -259,7 +260,7 @@ func prepareCurrentStateQuery(ctx context.Context, db prepareDatabase) (sq.Selec
 				var (
 					lastRun         sql.NullTime
 					eventDate       sql.NullTime
-					currentPosition sql.NullFloat64
+					currentPosition decimal.NullDecimal
 					aggregateType   sql.NullString
 					aggregateID     sql.NullString
 					sequence        sql.NullInt64
@@ -280,7 +281,7 @@ func prepareCurrentStateQuery(ctx context.Context, db prepareDatabase) (sq.Selec
 				}
 				currentState.State.EventCreatedAt = eventDate.Time
 				currentState.State.LastRun = lastRun.Time
-				currentState.Position = currentPosition.Float64
+				currentState.Position = currentPosition.Decimal
 				currentState.AggregateType = eventstore.AggregateType(aggregateType.String)
 				currentState.AggregateID = aggregateID.String
 				currentState.Sequence = uint64(sequence.Int64)

internal/query/current_state_test.go

@@ -7,6 +7,8 @@ import (
 	"fmt"
 	"regexp"
 	"testing"
+
+	"github.com/shopspring/decimal"
 )
 
 var (
@@ -87,7 +89,7 @@ func Test_CurrentSequencesPrepares(t *testing.T) {
 						State: State{
 							EventCreatedAt: testNow,
 							LastRun:        testNow,
-							Position:       20211108,
+							Position:       decimal.NewFromInt(20211108),
 							AggregateID:    "agg-id",
 							AggregateType:  "agg-type",
 							Sequence:       20211108,
@@ -134,7 +136,7 @@ func Test_CurrentSequencesPrepares(t *testing.T) {
 						ProjectionName: "projection-name",
 						State: State{
 							EventCreatedAt: testNow,
-							Position:       20211108,
+							Position:       decimal.NewFromInt(20211108),
 							LastRun:        testNow,
 							AggregateID:    "agg-id",
 							AggregateType:  "agg-type",
@@ -145,7 +147,7 @@ func Test_CurrentSequencesPrepares(t *testing.T) {
 						ProjectionName: "projection-name2",
 						State: State{
 							EventCreatedAt: testNow,
-							Position:       20211108,
+							Position:       decimal.NewFromInt(20211108),
 							LastRun:        testNow,
 							AggregateID:    "agg-id",
 							AggregateType:  "agg-type",

internal/query/user_grant.go

@@ -277,7 +277,7 @@ func (q *Queries) UserGrants(ctx context.Context, queries *UserGrantsQueries, sh
 		return nil, zerrors.ThrowInternal(err, "QUERY-wXnQR", "Errors.Query.SQLStatement")
 	}
 
-	latestSequence, err := q.latestState(ctx, userGrantTable)
+	latestState, err := q.latestState(ctx, userGrantTable)
 	if err != nil {
 		return nil, err
 	}
@@ -290,7 +290,7 @@ func (q *Queries) UserGrants(ctx context.Context, queries *UserGrantsQueries, sh
 		return nil, err
 	}
 
-	grants.State = latestSequence
+	grants.State = latestState
 	return grants, nil
 }
 

internal/query/user_membership.go

@@ -144,7 +144,7 @@ func (q *Queries) Memberships(ctx context.Context, queries *MembershipSearchQuer
 	if err != nil {
 		return nil, zerrors.ThrowInvalidArgument(err, "QUERY-T84X9", "Errors.Query.InvalidRequest")
 	}
-	latestSequence, err := q.latestState(ctx, orgMemberTable, instanceMemberTable, projectMemberTable, projectGrantMemberTable)
+	latestState, err := q.latestState(ctx, orgMemberTable, instanceMemberTable, projectMemberTable, projectGrantMemberTable)
 	if err != nil {
 		return nil, err
 	}
@@ -157,7 +157,7 @@ func (q *Queries) Memberships(ctx context.Context, queries *MembershipSearchQuer
 	if err != nil {
 		return nil, err
 	}
-	memberships.State = latestSequence
+	memberships.State = latestState
 	return memberships, nil
 }