Module planner

Modules§

at_modifier 🔒: Anchored selector planning and replay for the PromQL @ modifier.
function_plans 🔒: Dedicated helper plans for PromQL functions that cannot be expressed as a plain scalar function over the input plan: the histogram helpers, vector(), scalar(), and absent().
island 🔒: The binary-island fast path of the PromQL planner.
matching_filters 🔒: Propagation of label matchers between the operands of a PromQL binary expression.
set_operator 🔒: Planning of the PromQL set operators (and, unless, and or).

BinaryResultLabels 🔒: Result labels a vector-vector binary operation derives from its matching modifier, projected from the operand each label belongs to.
FunctionArgs 🔒
PromPlanner
PromPlannerContext 🔒

ScalarFunc 🔒: Represents different types of scalar functions supported in PromQL expressions. Each variant defines how the function should be processed and what arguments it expects.

DB_COLUMN_MATCHER 🔒
DEFAULT_FIELD_COLUMN 🔒: default value column name for empty metric
DEFAULT_TIME_INDEX_COLUMN 🔒
FIELD_COLUMN_MATCHER 🔒: Special modifier to project field columns under multi-field mode
INTERVAL_1H 🔒: Interval 1 hour in millisecond
LE_COLUMN_NAME 🔒: le column for conventional histogram.
MATCH_GROUP_COUNT_COLUMN 🔒: Per-match-group row count the vector matching cardinality check is built on.
MAX_SCATTER_POINTS 🔒: Threshold for scatter scan mode
OR_FLOAT_FIELD_PREFIX 🔒
OR_HISTOGRAM_FIELD_PREFIX 🔒
SCALAR_FUNCTION 🔒: scalar() function in PromQL.
SCHEMA_COLUMN_MATCHER 🔒: Special modifier for cross schema query
SPECIAL_ABSENT_FUNCTION 🔒: absent() function in PromQL
SPECIAL_HISTOGRAM_FRACTION 🔒: histogram_fraction function in PromQL
SPECIAL_HISTOGRAM_QUANTILE 🔒: histogram_quantile function in PromQL
SPECIAL_TIME_FUNCTION 🔒: time() function in PromQL.
SPECIAL_VECTOR_FUNCTION 🔒: vector function in PromQL
TIMESTAMP_VALUE_PREFIX 🔒

LABEL_NAME_REGEX 🔒: Static regex for validating label names according to Prometheus specification. Label names must match the regex: [a-zA-Z_][a-zA-Z0-9_]*