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package postgres |
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import ( |
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"context" |
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"errors" |
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"log/slog" |
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"strconv" |
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"github.com/jackc/pgx/v5" |
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"github.com/Masterminds/squirrel" |
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"google.golang.org/protobuf/encoding/protojson" |
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"google.golang.org/protobuf/types/known/anypb" |
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"github.com/Permify/permify/internal" |
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"github.com/Permify/permify/internal/storage" |
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"github.com/Permify/permify/internal/storage/postgres/snapshot" |
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"github.com/Permify/permify/internal/storage/postgres/utils" |
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"github.com/Permify/permify/pkg/database" |
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db "github.com/Permify/permify/pkg/database/postgres" |
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base "github.com/Permify/permify/pkg/pb/base/v1" |
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"github.com/Permify/permify/pkg/token" |
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) |
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// DataReader is a struct which holds a reference to the database, transaction options and a logger. |
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// It is responsible for reading data from the database. |
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type DataReader struct { |
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database *db.Postgres // database is an instance of the PostgreSQL database |
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txOptions pgx.TxOptions // txOptions specifies the isolation level for database transaction and sets it as read only |
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} |
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// NewDataReader is a constructor function for DataReader. |
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// It initializes a new DataReader with a given database, a logger, and sets transaction options to be read-only with Repeatable Read isolation level. |
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func NewDataReader(database *db.Postgres) *DataReader { |
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return &DataReader{ |
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database: database, // Set the database to the passed in PostgreSQL instance |
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txOptions: pgx.TxOptions{IsoLevel: pgx.ReadCommitted, AccessMode: pgx.ReadOnly}, // Set the transaction options |
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} |
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} |
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// QueryRelationships reads relation tuples from the storage based on the given filter. |
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func (r *DataReader) QueryRelationships(ctx context.Context, tenantID string, filter *base.TupleFilter, snap string, pagination database.CursorPagination) (it *database.TupleIterator, err error) { |
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// Start a new trace span and end it when the function exits. |
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ctx, span := internal.Tracer.Start(ctx, "data-reader.query-relationships") |
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defer span.End() |
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slog.DebugContext(ctx, "querying relationships for tenant_id", slog.String("tenant_id", tenantID)) |
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// Decode the snapshot value. |
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var st token.SnapToken |
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st, err = snapshot.EncodedToken{Value: snap}.Decode() |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
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} |
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// Build the relationships query based on the provided filter and snapshot value. |
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var args []interface{} |
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builder := r.database.Builder.Select("entity_type, entity_id, relation, subject_type, subject_id, subject_relation").From(RelationTuplesTable).Where(squirrel.Eq{"tenant_id": tenantID}) |
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builder = utils.TuplesFilterQueryForSelectBuilder(builder, filter) |
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builder = utils.SnapshotQuery(builder, st.(snapshot.Token).Value.Uint) |
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if pagination.Cursor() != "" { |
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var t database.ContinuousToken |
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t, err = utils.EncodedContinuousToken{Value: pagination.Cursor()}.Decode() |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
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} |
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builder = builder.Where(squirrel.GtOrEq{pagination.Sort(): t.(utils.ContinuousToken).Value}) |
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} |
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if pagination.Sort() != "" { |
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builder = builder.OrderBy(pagination.Sort()) |
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} |
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// Apply limit if specified in pagination |
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limit := pagination.Limit() |
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if limit > 0 { |
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builder = builder.Limit(uint64(limit)) |
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} |
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// Generate the SQL query and arguments. |
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var query string |
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query, args, err = builder.ToSql() |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
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} |
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slog.DebugContext(ctx, "generated sql query", slog.String("query", query), "with args", slog.Any("arguments", args)) |
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// Execute the SQL query and retrieve the result rows. |
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var rows pgx.Rows |
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rows, err = r.database.ReadPool.Query(ctx, query, args...) |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_EXECUTION) |
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} |
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defer rows.Close() |
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// Process the result rows and store the relationships in a TupleCollection. |
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collection := database.NewTupleCollection() |
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for rows.Next() { |
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rt := storage.RelationTuple{} |
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err = rows.Scan(&rt.EntityType, &rt.EntityID, &rt.Relation, &rt.SubjectType, &rt.SubjectID, &rt.SubjectRelation) |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
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} |
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collection.Add(rt.ToTuple()) |
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} |
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if err = rows.Err(); err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
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} |
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slog.DebugContext(ctx, "successfully retrieved relation tuples from the database") |
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// Return a TupleIterator created from the TupleCollection. |
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return collection.CreateTupleIterator(), nil |
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} |
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// ReadRelationships reads relation tuples from the storage based on the given filter and pagination. |
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func (r *DataReader) ReadRelationships(ctx context.Context, tenantID string, filter *base.TupleFilter, snap string, pagination database.Pagination) (collection *database.TupleCollection, ct database.EncodedContinuousToken, err error) { |
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// Start a new trace span and end it when the function exits. |
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ctx, span := internal.Tracer.Start(ctx, "data-reader.read-relationships") |
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defer span.End() |
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slog.DebugContext(ctx, "reading relationships for tenant_id", slog.String("tenant_id", tenantID)) |
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// Decode the snapshot value. |
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var st token.SnapToken |
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st, err = snapshot.EncodedToken{Value: snap}.Decode() |
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if err != nil { |
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return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
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} |
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// Build the relationships query based on the provided filter, snapshot value, and pagination settings. |
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builder := r.database.Builder.Select("id, entity_type, entity_id, relation, subject_type, subject_id, subject_relation").From(RelationTuplesTable).Where(squirrel.Eq{"tenant_id": tenantID}) |
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builder = utils.TuplesFilterQueryForSelectBuilder(builder, filter) |
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builder = utils.SnapshotQuery(builder, st.(snapshot.Token).Value.Uint) |
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// Apply the pagination token and limit to the query. |
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if pagination.Token() != "" { |
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var t database.ContinuousToken |
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t, err = utils.EncodedContinuousToken{Value: pagination.Token()}.Decode() |
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if err != nil { |
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return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
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} |
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var v uint64 |
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v, err = strconv.ParseUint(t.(utils.ContinuousToken).Value, 10, 64) |
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if err != nil { |
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return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
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} |
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builder = builder.Where(squirrel.GtOrEq{"id": v}) |
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} |
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builder = builder.OrderBy("id") |
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if pagination.PageSize() != 0 { |
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builder = builder.Limit(uint64(pagination.PageSize() + 1)) |
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} |
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// Generate the SQL query and arguments. |
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var query string |
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var args []interface{} |
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query, args, err = builder.ToSql() |
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if err != nil { |
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return nil, database.NewNoopContinuousToken().Encode(), utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
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} |
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slog.DebugContext(ctx, "generated sql query", slog.String("query", query), "with args", slog.Any("arguments", args)) |
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// Execute the query and retrieve the rows. |
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var rows pgx.Rows |
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rows, err = r.database.ReadPool.Query(ctx, query, args...) |
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if err != nil { |
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return nil, database.NewNoopContinuousToken().Encode(), utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_EXECUTION) |
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} |
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defer rows.Close() |
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var lastID uint64 |
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// Iterate through the rows and scan the result into a RelationTuple struct. |
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tuples := make([]*base.Tuple, 0, pagination.PageSize()+1) |
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for rows.Next() { |
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rt := storage.RelationTuple{} |
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err = rows.Scan(&rt.ID, &rt.EntityType, &rt.EntityID, &rt.Relation, &rt.SubjectType, &rt.SubjectID, &rt.SubjectRelation) |
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if err != nil { |
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return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
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} |
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lastID = rt.ID |
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tuples = append(tuples, rt.ToTuple()) |
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} |
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// Check for any errors during iteration. |
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if err = rows.Err(); err != nil { |
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return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
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} |
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slog.DebugContext(ctx, "successfully read relation tuples from database") |
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// Return the results and encoded continuous token for pagination. |
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if pagination.PageSize() != 0 && len(tuples) > int(pagination.PageSize()) { |
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return database.NewTupleCollection(tuples[:pagination.PageSize()]...), utils.NewContinuousToken(strconv.FormatUint(lastID, 10)).Encode(), nil |
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} |
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return database.NewTupleCollection(tuples...), database.NewNoopContinuousToken().Encode(), nil |
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} |
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// QuerySingleAttribute retrieves a single attribute from the storage based on the given filter. |
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func (r *DataReader) QuerySingleAttribute(ctx context.Context, tenantID string, filter *base.AttributeFilter, snap string) (attribute *base.Attribute, err error) { |
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// Start a new trace span and end it when the function exits. |
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ctx, span := internal.Tracer.Start(ctx, "data-reader.query-single-attribute") |
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defer span.End() |
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slog.DebugContext(ctx, "querying single attribute for tenant_id", slog.String("tenant_id", tenantID)) |
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// Decode the snapshot value. |
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var st token.SnapToken |
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st, err = snapshot.EncodedToken{Value: snap}.Decode() |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
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} |
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// Build the relationships query based on the provided filter and snapshot value. |
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var args []interface{} |
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builder := r.database.Builder.Select("entity_type, entity_id, attribute, value").From(AttributesTable).Where(squirrel.Eq{"tenant_id": tenantID}) |
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builder = utils.AttributesFilterQueryForSelectBuilder(builder, filter) |
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builder = utils.SnapshotQuery(builder, st.(snapshot.Token).Value.Uint) |
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226
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// Generate the SQL query and arguments. |
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var query string |
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query, args, err = builder.ToSql() |
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if err != nil { |
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
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} |
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slog.DebugContext(ctx, "generated sql query", slog.String("query", query), "with args", slog.Any("arguments", args)) |
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235
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row := r.database.ReadPool.QueryRow(ctx, query, args...) |
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rt := storage.Attribute{} |
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239
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// Suppose you have a struct `rt` with a field `Value` of type `*anypb.Any`. |
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240
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var valueStr string |
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242
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// Scan the row from the database into the fields of `rt` and `valueStr`. |
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err = row.Scan(&rt.EntityType, &rt.EntityID, &rt.Attribute, &valueStr) |
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if err != nil { |
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if errors.Is(err, pgx.ErrNoRows) { |
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return nil, nil |
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} else { |
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248
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
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} |
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250
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} |
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251
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252
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// Unmarshal the JSON data from `valueStr` into `rt.Value`. |
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253
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rt.Value = &anypb.Any{} |
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254
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err = protojson.Unmarshal([]byte(valueStr), rt.Value) |
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255
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if err != nil { |
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256
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
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257
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} |
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259
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slog.DebugContext(ctx, "successfully retrieved Single attribute from the database") |
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261
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return rt.ToAttribute(), nil |
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262
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} |
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263
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264
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// QueryAttributes reads multiple attributes from the storage based on the given filter. |
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265
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func (r *DataReader) QueryAttributes(ctx context.Context, tenantID string, filter *base.AttributeFilter, snap string, pagination database.CursorPagination) (it *database.AttributeIterator, err error) { |
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266
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// Start a new trace span and end it when the function exits. |
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267
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ctx, span := internal.Tracer.Start(ctx, "data-reader.query-attributes") |
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268
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defer span.End() |
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269
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270
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slog.DebugContext(ctx, "querying Attributes for tenant_id", slog.String("tenant_id", tenantID)) |
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271
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272
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// Decode the snapshot value. |
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273
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var st token.SnapToken |
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274
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st, err = snapshot.EncodedToken{Value: snap}.Decode() |
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275
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if err != nil { |
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276
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return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
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277
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} |
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278
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279
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// Build the attributes query based on the provided filter and snapshot value. |
|
280
|
|
|
var args []interface{} |
|
281
|
|
|
builder := r.database.Builder.Select("entity_type, entity_id, attribute, value").From(AttributesTable).Where(squirrel.Eq{"tenant_id": tenantID}) |
|
282
|
|
|
builder = utils.AttributesFilterQueryForSelectBuilder(builder, filter) |
|
283
|
|
|
builder = utils.SnapshotQuery(builder, st.(snapshot.Token).Value.Uint) |
|
284
|
|
|
|
|
285
|
|
|
if pagination.Cursor() != "" { |
|
286
|
|
|
var t database.ContinuousToken |
|
287
|
|
|
t, err = utils.EncodedContinuousToken{Value: pagination.Cursor()}.Decode() |
|
288
|
|
|
if err != nil { |
|
289
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
|
290
|
|
|
} |
|
291
|
|
|
builder = builder.Where(squirrel.GtOrEq{pagination.Sort(): t.(utils.ContinuousToken).Value}) |
|
292
|
|
|
} |
|
293
|
|
|
|
|
294
|
|
|
if pagination.Sort() != "" { |
|
295
|
|
|
builder = builder.OrderBy(pagination.Sort()) |
|
296
|
|
|
} |
|
297
|
|
|
|
|
298
|
|
|
// Apply limit if specified in pagination |
|
299
|
|
|
limit := pagination.Limit() |
|
300
|
|
|
if limit > 0 { |
|
301
|
|
|
builder = builder.Limit(uint64(limit)) |
|
302
|
|
|
} |
|
303
|
|
|
|
|
304
|
|
|
// Generate the SQL query and arguments. |
|
305
|
|
|
var query string |
|
306
|
|
|
query, args, err = builder.ToSql() |
|
307
|
|
|
if err != nil { |
|
308
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
|
309
|
|
|
} |
|
310
|
|
|
|
|
311
|
|
|
slog.DebugContext(ctx, "generated sql query", slog.String("query", query), "with args", slog.Any("arguments", args)) |
|
312
|
|
|
|
|
313
|
|
|
// Execute the SQL query and retrieve the result rows. |
|
314
|
|
|
var rows pgx.Rows |
|
315
|
|
|
rows, err = r.database.ReadPool.Query(ctx, query, args...) |
|
316
|
|
|
if err != nil { |
|
317
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_EXECUTION) |
|
318
|
|
|
} |
|
319
|
|
|
defer rows.Close() |
|
320
|
|
|
|
|
321
|
|
|
// Process the result rows and store the attributes in an AttributeCollection. |
|
322
|
|
|
collection := database.NewAttributeCollection() |
|
323
|
|
|
for rows.Next() { |
|
324
|
|
|
rt := storage.Attribute{} |
|
325
|
|
|
|
|
326
|
|
|
// Suppose you have a struct `rt` with a field `Value` of type `*anypb.Any`. |
|
327
|
|
|
var valueStr string |
|
328
|
|
|
|
|
329
|
|
|
// Scan the row from the database into the fields of `rt` and `valueStr`. |
|
330
|
|
|
err := rows.Scan(&rt.EntityType, &rt.EntityID, &rt.Attribute, &valueStr) |
|
331
|
|
|
if err != nil { |
|
332
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
|
333
|
|
|
} |
|
334
|
|
|
|
|
335
|
|
|
// Unmarshal the JSON data from `valueStr` into `rt.Value`. |
|
336
|
|
|
rt.Value = &anypb.Any{} |
|
337
|
|
|
err = protojson.Unmarshal([]byte(valueStr), rt.Value) |
|
338
|
|
|
if err != nil { |
|
339
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
|
340
|
|
|
} |
|
341
|
|
|
|
|
342
|
|
|
collection.Add(rt.ToAttribute()) |
|
343
|
|
|
} |
|
344
|
|
|
if err = rows.Err(); err != nil { |
|
345
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
|
346
|
|
|
} |
|
347
|
|
|
|
|
348
|
|
|
slog.DebugContext(ctx, "successfully retrieved attributes tuples from the database") |
|
349
|
|
|
|
|
350
|
|
|
// Return an AttributeIterator created from the AttributeCollection. |
|
351
|
|
|
return collection.CreateAttributeIterator(), nil |
|
352
|
|
|
} |
|
353
|
|
|
|
|
354
|
|
|
// ReadAttributes reads multiple attributes from the storage based on the given filter and pagination. |
|
355
|
|
|
func (r *DataReader) ReadAttributes(ctx context.Context, tenantID string, filter *base.AttributeFilter, snap string, pagination database.Pagination) (collection *database.AttributeCollection, ct database.EncodedContinuousToken, err error) { |
|
356
|
|
|
// Start a new trace span and end it when the function exits. |
|
357
|
|
|
ctx, span := internal.Tracer.Start(ctx, "data-reader.read-attributes") |
|
358
|
|
|
defer span.End() |
|
359
|
|
|
|
|
360
|
|
|
slog.DebugContext(ctx, "reading attributes for tenant_id", slog.String("tenant_id", tenantID)) |
|
361
|
|
|
|
|
362
|
|
|
// Decode the snapshot value. |
|
363
|
|
|
var st token.SnapToken |
|
364
|
|
|
st, err = snapshot.EncodedToken{Value: snap}.Decode() |
|
365
|
|
|
if err != nil { |
|
366
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
|
367
|
|
|
} |
|
368
|
|
|
|
|
369
|
|
|
// Build the relationships query based on the provided filter, snapshot value, and pagination settings. |
|
370
|
|
|
builder := r.database.Builder.Select("id, entity_type, entity_id, attribute, value").From(AttributesTable).Where(squirrel.Eq{"tenant_id": tenantID}) |
|
371
|
|
|
builder = utils.AttributesFilterQueryForSelectBuilder(builder, filter) |
|
372
|
|
|
builder = utils.SnapshotQuery(builder, st.(snapshot.Token).Value.Uint) |
|
373
|
|
|
|
|
374
|
|
|
// Apply the pagination token and limit to the query. |
|
375
|
|
|
if pagination.Token() != "" { |
|
376
|
|
|
var t database.ContinuousToken |
|
377
|
|
|
t, err = utils.EncodedContinuousToken{Value: pagination.Token()}.Decode() |
|
378
|
|
|
if err != nil { |
|
379
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
|
380
|
|
|
} |
|
381
|
|
|
var v uint64 |
|
382
|
|
|
v, err = strconv.ParseUint(t.(utils.ContinuousToken).Value, 10, 64) |
|
383
|
|
|
if err != nil { |
|
384
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
|
385
|
|
|
} |
|
386
|
|
|
builder = builder.Where(squirrel.GtOrEq{"id": v}) |
|
387
|
|
|
} |
|
388
|
|
|
|
|
389
|
|
|
builder = builder.OrderBy("id") |
|
390
|
|
|
|
|
391
|
|
|
if pagination.PageSize() != 0 { |
|
392
|
|
|
builder = builder.Limit(uint64(pagination.PageSize() + 1)) |
|
393
|
|
|
} |
|
394
|
|
|
|
|
395
|
|
|
// Generate the SQL query and arguments. |
|
396
|
|
|
var query string |
|
397
|
|
|
var args []interface{} |
|
398
|
|
|
query, args, err = builder.ToSql() |
|
399
|
|
|
if err != nil { |
|
400
|
|
|
return nil, database.NewNoopContinuousToken().Encode(), utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
|
401
|
|
|
} |
|
402
|
|
|
|
|
403
|
|
|
slog.DebugContext(ctx, "generated sql query", slog.String("query", query), "with args", slog.Any("arguments", args)) |
|
404
|
|
|
|
|
405
|
|
|
// Execute the query and retrieve the rows. |
|
406
|
|
|
var rows pgx.Rows |
|
407
|
|
|
rows, err = r.database.ReadPool.Query(ctx, query, args...) |
|
408
|
|
|
if err != nil { |
|
409
|
|
|
return nil, database.NewNoopContinuousToken().Encode(), utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_EXECUTION) |
|
410
|
|
|
} |
|
411
|
|
|
defer rows.Close() |
|
412
|
|
|
|
|
413
|
|
|
var lastID uint64 |
|
414
|
|
|
|
|
415
|
|
|
// Iterate through the rows and scan the result into a RelationTuple struct. |
|
416
|
|
|
attributes := make([]*base.Attribute, 0, pagination.PageSize()+1) |
|
417
|
|
|
for rows.Next() { |
|
418
|
|
|
rt := storage.Attribute{} |
|
419
|
|
|
|
|
420
|
|
|
// Suppose you have a struct `rt` with a field `Value` of type `*anypb.Any`. |
|
421
|
|
|
var valueStr string |
|
422
|
|
|
|
|
423
|
|
|
// Scan the row from the database into the fields of `rt` and `valueStr`. |
|
424
|
|
|
err := rows.Scan(&rt.ID, &rt.EntityType, &rt.EntityID, &rt.Attribute, &valueStr) |
|
425
|
|
|
if err != nil { |
|
426
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
|
427
|
|
|
} |
|
428
|
|
|
lastID = rt.ID |
|
429
|
|
|
|
|
430
|
|
|
// Unmarshal the JSON data from `valueStr` into `rt.Value`. |
|
431
|
|
|
rt.Value = &anypb.Any{} |
|
432
|
|
|
err = protojson.Unmarshal([]byte(valueStr), rt.Value) |
|
433
|
|
|
if err != nil { |
|
434
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
|
435
|
|
|
} |
|
436
|
|
|
|
|
437
|
|
|
attributes = append(attributes, rt.ToAttribute()) |
|
438
|
|
|
} |
|
439
|
|
|
// Check for any errors during iteration. |
|
440
|
|
|
if err = rows.Err(); err != nil { |
|
441
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
|
442
|
|
|
} |
|
443
|
|
|
|
|
444
|
|
|
slog.DebugContext(ctx, "successfully read attributes from the database") |
|
445
|
|
|
|
|
446
|
|
|
// Return the results and encoded continuous token for pagination. |
|
447
|
|
|
if len(attributes) > int(pagination.PageSize()) { |
|
448
|
|
|
return database.NewAttributeCollection(attributes[:pagination.PageSize()]...), utils.NewContinuousToken(strconv.FormatUint(lastID, 10)).Encode(), nil |
|
449
|
|
|
} |
|
450
|
|
|
|
|
451
|
|
|
return database.NewAttributeCollection(attributes...), database.NewNoopContinuousToken().Encode(), nil |
|
452
|
|
|
} |
|
453
|
|
|
|
|
454
|
|
|
// QueryUniqueSubjectReferences reads unique subject references from the storage based on the given filter and pagination. |
|
455
|
|
|
func (r *DataReader) QueryUniqueSubjectReferences(ctx context.Context, tenantID string, subjectReference *base.RelationReference, excluded []string, snap string, pagination database.Pagination) (ids []string, ct database.EncodedContinuousToken, err error) { |
|
456
|
|
|
// Start a new trace span and end it when the function exits. |
|
457
|
|
|
ctx, span := internal.Tracer.Start(ctx, "data-reader.query-unique-subject-reference") |
|
458
|
|
|
defer span.End() |
|
459
|
|
|
|
|
460
|
|
|
slog.DebugContext(ctx, "querying unique subject references for tenant_id", slog.String("tenant_id", tenantID)) |
|
461
|
|
|
|
|
462
|
|
|
// Decode the snapshot value. |
|
463
|
|
|
var st token.SnapToken |
|
464
|
|
|
st, err = snapshot.EncodedToken{Value: snap}.Decode() |
|
465
|
|
|
if err != nil { |
|
466
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
|
467
|
|
|
} |
|
468
|
|
|
|
|
469
|
|
|
// Build the relationships query based on the provided filter, snapshot value, and pagination settings. |
|
470
|
|
|
builder := r.database.Builder. |
|
471
|
|
|
Select("subject_id"). // This will pick the smallest `id` for each unique `subject_id`. |
|
472
|
|
|
From(RelationTuplesTable). |
|
473
|
|
|
Where(squirrel.Eq{"tenant_id": tenantID}). |
|
474
|
|
|
GroupBy("subject_id") |
|
475
|
|
|
|
|
476
|
|
|
// Apply subject filter |
|
477
|
|
|
builder = utils.TuplesFilterQueryForSelectBuilder(builder, &base.TupleFilter{ |
|
478
|
|
|
Subject: &base.SubjectFilter{ |
|
479
|
|
|
Type: subjectReference.GetType(), |
|
480
|
|
|
Relation: subjectReference.GetRelation(), |
|
481
|
|
|
}, |
|
482
|
|
|
}) |
|
483
|
|
|
|
|
484
|
|
|
// Apply snapshot filter |
|
485
|
|
|
builder = utils.SnapshotQuery(builder, st.(snapshot.Token).Value.Uint) |
|
486
|
|
|
|
|
487
|
|
|
// Apply exclusion if the list is not empty |
|
488
|
|
|
if len(excluded) > 0 { |
|
489
|
|
|
builder = builder.Where(squirrel.NotEq{"subject_id": excluded}) |
|
490
|
|
|
} |
|
491
|
|
|
|
|
492
|
|
|
// Apply the pagination token and limit to the query. |
|
493
|
|
|
if pagination.Token() != "" { |
|
494
|
|
|
var t database.ContinuousToken |
|
495
|
|
|
t, err = utils.EncodedContinuousToken{Value: pagination.Token()}.Decode() |
|
496
|
|
|
if err != nil { |
|
497
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INVALID_CONTINUOUS_TOKEN) |
|
498
|
|
|
} |
|
499
|
|
|
builder = builder.Where(squirrel.GtOrEq{"subject_id": t.(utils.ContinuousToken).Value}) |
|
500
|
|
|
} |
|
501
|
|
|
|
|
502
|
|
|
builder = builder.OrderBy("subject_id") |
|
503
|
|
|
|
|
504
|
|
|
if pagination.PageSize() != 0 { |
|
505
|
|
|
builder = builder.Limit(uint64(pagination.PageSize() + 1)) |
|
506
|
|
|
} |
|
507
|
|
|
|
|
508
|
|
|
// Generate the SQL query and arguments. |
|
509
|
|
|
var query string |
|
510
|
|
|
var args []interface{} |
|
511
|
|
|
query, args, err = builder.ToSql() |
|
512
|
|
|
if err != nil { |
|
513
|
|
|
return nil, database.NewNoopContinuousToken().Encode(), utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
|
514
|
|
|
} |
|
515
|
|
|
|
|
516
|
|
|
slog.DebugContext(ctx, "generated sql query", slog.String("query", query), "with args", slog.Any("arguments", args)) |
|
517
|
|
|
|
|
518
|
|
|
// Execute the query and retrieve the rows. |
|
519
|
|
|
var rows pgx.Rows |
|
520
|
|
|
rows, err = r.database.ReadPool.Query(ctx, query, args...) |
|
521
|
|
|
if err != nil { |
|
522
|
|
|
return nil, database.NewNoopContinuousToken().Encode(), utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_EXECUTION) |
|
523
|
|
|
} |
|
524
|
|
|
defer rows.Close() |
|
525
|
|
|
|
|
526
|
|
|
var lastID string |
|
527
|
|
|
|
|
528
|
|
|
// Iterate through the rows and scan the result into a RelationTuple struct. |
|
529
|
|
|
subjectIDs := make([]string, 0, pagination.PageSize()+1) |
|
530
|
|
|
for rows.Next() { |
|
531
|
|
|
var subjectID string |
|
532
|
|
|
err = rows.Scan(&subjectID) |
|
533
|
|
|
if err != nil { |
|
534
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_INTERNAL) |
|
535
|
|
|
} |
|
536
|
|
|
|
|
537
|
|
|
subjectIDs = append(subjectIDs, subjectID) |
|
538
|
|
|
lastID = subjectID |
|
539
|
|
|
} |
|
540
|
|
|
// Check for any errors during iteration. |
|
541
|
|
|
if err = rows.Err(); err != nil { |
|
542
|
|
|
return nil, nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
|
543
|
|
|
} |
|
544
|
|
|
|
|
545
|
|
|
slog.DebugContext(ctx, "successfully retrieved unique subject references from the database") |
|
546
|
|
|
|
|
547
|
|
|
// Return the results and encoded continuous token for pagination. |
|
548
|
|
|
if pagination.PageSize() != 0 && len(subjectIDs) > int(pagination.PageSize()) { |
|
549
|
|
|
return subjectIDs[:pagination.PageSize()], utils.NewContinuousToken(lastID).Encode(), nil |
|
550
|
|
|
} |
|
551
|
|
|
|
|
552
|
|
|
return subjectIDs, database.NewNoopContinuousToken().Encode(), nil |
|
553
|
|
|
} |
|
554
|
|
|
|
|
555
|
|
|
// HeadSnapshot retrieves the latest snapshot token associated with the tenant. |
|
556
|
|
|
func (r *DataReader) HeadSnapshot(ctx context.Context, tenantID string) (token.SnapToken, error) { |
|
557
|
|
|
// Start a new trace span and end it when the function exits. |
|
558
|
|
|
ctx, span := internal.Tracer.Start(ctx, "data-reader.head-snapshot") |
|
559
|
|
|
defer span.End() |
|
560
|
|
|
|
|
561
|
|
|
slog.DebugContext(ctx, "getting head snapshot for tenant_id", slog.String("tenant_id", tenantID)) |
|
562
|
|
|
|
|
563
|
|
|
var xid db.XID8 |
|
564
|
|
|
|
|
565
|
|
|
// Build the query to find the highest transaction ID associated with the tenant. |
|
566
|
|
|
builder := r.database.Builder.Select("id").From(TransactionsTable).Where(squirrel.Eq{"tenant_id": tenantID}).OrderBy("id DESC").Limit(1) |
|
567
|
|
|
query, args, err := builder.ToSql() |
|
568
|
|
|
if err != nil { |
|
569
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SQL_BUILDER) |
|
570
|
|
|
} |
|
571
|
|
|
|
|
572
|
|
|
// TODO: To optimize this query, create the following index concurrently to avoid table locks: |
|
573
|
|
|
// CREATE INDEX CONCURRENTLY idx_transactions_tenant_id_id ON transactions(tenant_id, id DESC); |
|
574
|
|
|
|
|
575
|
|
|
// Execute the query and retrieve the highest transaction ID. |
|
576
|
|
|
err = r.database.ReadPool.QueryRow(ctx, query, args...).Scan(&xid) |
|
577
|
|
|
if err != nil { |
|
578
|
|
|
// If no rows are found, return a snapshot token with a value of 0. |
|
579
|
|
|
if errors.Is(err, pgx.ErrNoRows) { |
|
580
|
|
|
return snapshot.Token{Value: db.XID8{Uint: 0}}, nil |
|
581
|
|
|
} |
|
582
|
|
|
return nil, utils.HandleError(ctx, span, err, base.ErrorCode_ERROR_CODE_SCAN) |
|
583
|
|
|
} |
|
584
|
|
|
|
|
585
|
|
|
slog.DebugContext(ctx, "successfully retrieved latest snapshot token") |
|
586
|
|
|
|
|
587
|
|
|
// Return the latest snapshot token associated with the tenant. |
|
588
|
|
|
return snapshot.Token{Value: xid}, nil |
|
589
|
|
|
} |
|
590
|
|
|
|
Permify /
permify
