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Generate tbigint temporal-number comparison operators#191

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estebanzimanyi:feat/nebula-tbigint-cmp-operators
Open

Generate tbigint temporal-number comparison operators#191
estebanzimanyi wants to merge 5 commits into
MobilityDB:mainfrom
estebanzimanyi:feat/nebula-tbigint-cmp-operators

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Adds a tbigint base (int64_t value, tbigint_in constructor) to the
operator generator's per-base-type table, so the ever/always scalar-comparison
shapes cover the temporal big-integer family. Generates the 24 bigint/tbigint
comparison operators — ever/always × eq,ne,lt,le,gt,ge in both argument
orders — across the logical and physical layers, with matching grammar tokens,
parser dispatch, and CMake entries.

A normalized int64 scalar maps to the tbigint base through a single
SCALAR_ARG_TO_BASE table, keeping the comparison classifiers free of per-type
branches. The physical templates parametrize on the value C++ type, scalar C++
type, and MEOS input constructor, so they need no change. Placement is flat under
Functions/Meos, matching the sibling tint/tfloat comparison operators,
since the temporal-number family is always compiled.

Stacked on #170 (generator infrastructure); the shared generator changes land there first.

…aho-mqtt-cpp

The Nix environment provides paho-mqtt-cpp as a shared-only library and does
not include libmeos.  Four changes make the build pass:

- flake.nix: add stock paho-mqtt-c + paho-mqtt-cpp to baseThirdPartyDeps;
  pass -DNES_ENABLE_MEOS=OFF in both defaultPackage and devShell cmakeFlags.

- nes-plugins/CMakeLists.txt: introduce NES_ENABLE_MQTT and NES_ENABLE_MEOS
  options that gate the respective plugin subdirectories via
  activate_optional_plugin().

- nes-plugins/Sources/MQTTSource, nes-plugins/Sinks/MQTTSink: select
  PahoMqttCpp::paho-mqttpp3-static when available, fall back to the shared
  PahoMqttCpp::paho-mqttpp3 target (Nix only ships the shared variant).

- nes-physical-operators: gate all MEOS-specific add_plugin calls and the
  nes-meos link behind if(NES_ENABLE_MEOS) in three CMakeLists files
  (top-level, Functions/Meos, Aggregation/Function/Meos).

- CMakeLists.txt (root): declare option(NES_ENABLE_MEOS) and
  add_compile_definitions(NES_ENABLE_MEOS) before the nes-* subdirectory
  loop so the preprocessor symbol is visible to all sibling components.

- nes-query-optimizer/LowerToPhysicalWindowedAggregation.cpp: guard the
  TemporalSequenceAggregationPhysicalFunction include and instantiation
  with #ifdef NES_ENABLE_MEOS so the translation unit compiles and links
  when MEOS is disabled.
… build/grammar/QPC glue

tools/codegen/ contains codegen_nebula.py, which reads a JSON operator descriptor and emits the four-layer NebulaStream pipeline tuple (logical .hpp/.cpp + physical .hpp/.cpp) per MEOS scalar function, then idempotently injects add_plugin entries into the Meos CMakeLists files, lexer tokens and functionName alternations into AntlrSQL.g4, and dispatch cases into AntlrSQLQueryPlanCreator.cpp — each injection gated by a per-op marker so repeated runs are safe. build_descriptor.py classifies MEOS gap functions by signature into named SHAPEs that select the corresponding physical C++ template; trgeo-descriptor.json is the ready-to-use descriptor for the 34-operator trgeometry family (W148–W149). codegen_aggregations.py handles the separate aggregation four-layer shape. codegen_input.example.json documents the descriptor format. build_local.sh drives the NebulaStream dev-image cmake build without a host C++23 toolchain. The generator reproduces the committed W148–W149 trgeometry surface byte-for-byte from the descriptor. The generated IDL (meos-idl.json) is excluded from the repository and regenerated via MEOS-API run.py against the pinned MEOS headers.
…LIZED*

MEOS-API run.py correctly resolves GSERIALIZED in the IDL; parse_sigs
normalizes `const GSERIALIZED *` to GSERIALIZED* (strip-const + first-token
+ "*"). The four trgeometry shape classifiers that match geometry arguments
use GSERIALIZED* throughout:

- trgeometry_geo_predicate:  (Temporal*, int*)        → (Temporal*, GSERIALIZED*)
- geo_trgeometry_predicate:  (int*, Temporal*)         → (GSERIALIZED*, Temporal*)
- trgeometry_geo_dwithin:    (Temporal*, int*, double) → (Temporal*, GSERIALIZED*, double)
- trgeometry_nad geo-branch: (Temporal*, int*)         → (Temporal*, GSERIALIZED*)

The trgeometry_nad two-temporal branch adds fn.endswith("_trgeometry") so
nad_trgeometry_tpoint (Temporal*, Temporal*) is excluded, matching the
committed descriptor's scope.

Equivalence probe: build_descriptor.py against the master IDL (4492 fns)
reproduces the committed trgeo-descriptor.json 34-operator set byte-for-byte.
Genuine int* out-params (trgeometry_instants/segments/sequences/stboxes, all
with non-int return types) are unaffected. nad_trgeometry_tpoint is correctly
excluded.
…lways verbs

cmp_scalar_tempfirst and cmp_scalar_scalarfirst matched on signature alone, so a nearest-approach
function like nad_tint_int (int(Temporal*, int)) was misclassified as a comparison operator. Require
the ever/always + {eq,ne,lt,le,gt,ge} naming so only comparison functions match.
Extend the operator generator's per-base-type table with a tbigint base
(int64_t value, tbigint_in constructor) so the ever/always scalar-comparison
shapes emit operators for the temporal big-integer family, and regenerate the
24 bigint/tbigint comparison operators (ever/always eq,ne,lt,le,gt,ge in both
argument orders) across the logical and physical layers, with the matching
grammar tokens, parser dispatch, and CMake entries.

The comparison classifiers previously recognised only tint (int) and tfloat
(double) scalar arguments; a normalized int64 scalar now maps to the tbigint
base through a single SCALAR_ARG_TO_BASE table, keeping the classifiers free of
per-type branches. The physical templates already parametrize on the value C++
type, scalar C++ type, and MEOS input constructor, so no template change is
needed.
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