SQL function provsql.provenance_evaluate_compiled() – C++ semiring evaluation. More...

#include "postgres.h"
#include "fmgr.h"
#include "catalog/pg_type.h"
#include "utils/uuid.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "provsql_utils.h"
#include <string>
#include <vector>
#include <unordered_map>
#include <algorithm>
#include "Expectation.h"
#include "having_semantics.hpp"
#include "provenance_evaluate_compiled.hpp"
#include "semiring/Boolean.h"
#include "semiring/Counting.h"
#include "semiring/Formula.h"
#include "semiring/How.h"
#include "semiring/Why.h"
#include "semiring/Which.h"
#include "semiring/BoolExpr.h"
#include "semiring/Tropical.h"
#include "semiring/Viterbi.h"
#include "semiring/Lukasiewicz.h"
#include "semiring/IntervalUnion.h"
#include "semiring/MinMax.h"

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Functions
bool	join_with_temp_uuids (Oid table, const std::vector< std::string > &uuids)
	Join a provenance mapping table with a set of UUIDs using SPI.
static Datum	provenance_evaluate_compiled_internal (pg_uuid_t token, Oid table, const std::string &semiring, Oid type)
	Core implementation of compiled provenance evaluation.
Datum	provenance_evaluate_compiled (PG_FUNCTION_ARGS)
	PostgreSQL-callable wrapper for provenance_evaluate_compiled().

Variables
const char *	drop_temp_table = "DROP TABLE IF EXISTS tmp_uuids;"
	DROP TABLE statement for the per-query temporary provenance mapping table.

Detailed Description

SQL function provsql.provenance_evaluate_compiled() – C++ semiring evaluation.

Implements the compiled (C++ generic) variant of provenance circuit evaluation. Unlike provenance_evaluate() (which calls user-supplied PostgreSQL functions for each semiring operation), this function evaluates the circuit using one of the built-in C++ semiring implementations from the semiring/ directory.

Supported semirings (selected by the semiring argument):

"boolean" → semiring::Boolean
"counting" → semiring::Counting
"formula" → semiring::Formula (symbolic representation as a formula)
"how" → semiring::How (canonical polynomial provenance ℕ[X])
"why" → semiring::Why (witness sets)
"which" → semiring::Which (lineage)
"boolexpr" → semiring::BoolExpr (Boolean circuit for probability)
"tropical" → semiring::Tropical (min-plus, shortest-cost)
"viterbi" → semiring::Viterbi (max-times, most-likely derivation)
"lukasiewicz" → semiring::Lukasiewicz (Łukasiewicz fuzzy t-norm)
"interval_union" → semiring::IntervalUnion (multirange union, PG14+) for any of tstzmultirange, nummultirange, int4multirange; selected by the result type of the call
"minmax" / "maxmin" → semiring::MinMax over any user-defined PostgreSQL enum type, selected by get_typtype() == TYPTYPE_ENUM

Each compiled semiring exposes parse_leaf() and (for text-valued carriers) to_text() member functions, so this file is purely a dispatcher: it picks the right semiring instance from the (result-type, semiring-name) pair, then calls the pec() template which runs the same four-step pipeline for every semiring (build leaf mapping, evaluate HAVING sub-circuits, evaluate the main circuit, encode the result as a Datum).

Definition in file provenance_evaluate_compiled.cpp.

Function Documentation

◆ join_with_temp_uuids()

bool join_with_temp_uuids	(	Oid	table,
		const std::vector< std::string > &	uuids )

Join a provenance mapping table with a set of UUIDs using SPI.

Parameters

table	OID of the provenance mapping relation.
uuids	List of UUID strings to join against.

Returns: true if a temporary table was created (caller must drop it).

Definition at line 155 of file provenance_evaluate_compiled.cpp.

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◆ provenance_evaluate_compiled()

Datum provenance_evaluate_compiled ( PG_FUNCTION_ARGS )

PostgreSQL-callable wrapper for provenance_evaluate_compiled().

Definition at line 359 of file provenance_evaluate_compiled.cpp.

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◆ provenance_evaluate_compiled_internal()

Datum provenance_evaluate_compiled_internal	(	pg_uuid_t	token,
		Oid	table,
		const std::string &	semiring,
		Oid	type )

static

Core implementation of compiled provenance evaluation.

Parameters

token	UUID of the root provenance gate.
table	OID of the provenance mapping relation.
semiring	Name of the semiring to evaluate over.
type	OID of the result element type.