CanParallelize tests if a subtree is parallelizable.

CloneNode is a helper function to clone a node.

NewASTNodeMapper creates an ASTMapper from a NodeMapper.

NewMultiMapper instaniates an ASTMapper from multiple ASTMappers.

NewShardSummer instantiates an ASTMapper which will fan out sum queries by shard.

NewSubtreeFolder creates a subtreeFolder which can reduce an AST to one embedded query if it contains no embedded queries yet.

ParallelizableFunc ensures that a promql function can be part of a parallel query.

ParseShard will extract the shard information encoded in ShardLabelFmt.

Predicate is a helper which uses parser.Walk under the hood determine if any node in a subtree returns true for a specified function.

ShardFromMatchers extracts a ShardAnnotation and the index it was pulled from in the matcher list.

VectorSquash reduces an AST into a single vector query which can be hijacked by a Queryable impl.

EmbeddedQueriesMetricName is a reserved label (metric name) denoting an embedded query.

QueryLabel is a reserved label containing an embedded query.

ShardLabel is a reserved label referencing a cortex shard.

ShardLabelFmt is the fmt of the ShardLabel key.

JSONCodec is a Codec that uses JSON representations of EmbeddedQueries structs.

ShardLabelRE matches a value in ShardLabelFmt.

ASTNodeMapper is an ASTMapper adapter which uses a NodeMapper internally.

EmbeddedQueries is a wrapper type for encoding queries.

MultiMapper can compose multiple ASTMappers.

ShardAnnotation is a convenience struct which holds data from a parsed shard label.

ASTMapper is the exported interface for mapping between multiple AST representations.

NodeMapper either maps a single AST node or returns the unaltered node.

MapperFunc is a function adapter for ASTMapper.

NodeMapperFunc is an adapter for NodeMapper.