Foreign Scan

Delegates a foreign scan or supported direct modification to the foreign-data wrapper.

Reading PG 18·Select a recorded version

Core node tag: T_ForeignScan
Structured EXPLAIN Node Type: Foreign Scan
Inputs: Foreign-data wrapper plan and callbacks
Output: Provider-defined scan or RETURNING tuples
Executor initializer: ExecInitForeignScan
Memory mechanism: unclassified
evidence kind: source and documentation
explain names: Foreign Scan, Foreign Insert, Foreign Update, Foreign Delete
explain prefixes: Parallel, Async
node tag: T_ForeignScan
parallel callbacks: ExecForeignScanEstimate, ExecForeignScanInitializeDSM, ExecForeignScanInitializeWorker, ExecForeignScanReInitializeDSM
partial modes: Unknown
runtime verified: false
strategies: Unknown

Definition PG 18

Delegates a foreign scan or supported direct modification to the foreign-data wrapper.

EXPLAIN labels in this source build

Text-format label	Structured node identity
Foreign Scan	Foreign Scan
Foreign Insert	Foreign Scan
Foreign Update	Foreign Scan
Foreign Delete	Foreign Scan

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Complete source facts

memory

{"description":"This extraction does not assign a universal memory limit or spill policy to this node. Inspect the same-build implementation and its expressions or provider.","evidence":[{"archive_sha256":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","label":"src/backend/executor/nodeForeignscan.c","path":"src/backend/executor/nodeForeignscan.c","sha256":"37b85b68b6fc26d94e40d9173dbfed8b69c70877c54ee72ffc761e2f7b876a0c","url":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2"}],"mechanism":"unclassified","source_notes":[]}

source inventory

{"executor":"src/backend/executor/execProcnode.c","explain":"src/backend/commands/explain.c","implementation":"src/backend/executor/nodeForeignscan.c"}

Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

Text language: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f