The server blocked a SQL statement because the requested feature, clause, or function is not supported in the current PostgreSQL build or configuration.
PostgreSQL feature_not_supported (SQLSTATE 0A000) means the server does not recognize or allow the SQL feature you invoked. Switch to a supported alternative, install the needed extension, or upgrade PostgreSQL to a version that provides the feature.
PostgreSQL Error 0A000
PostgreSQL raises SQLSTATE 0A000 when a query uses a feature that the server cannot execute. The message signals a capability gap, not a syntax problem.
The limitation may stem from the PostgreSQL version, disabled extensions, transaction mode, or server compilation flags. Resolving the error requires choosing a supported alternative or enabling the missing capability.
Unsupported SQL verbs like MERGE, SELECT ...
DISTINCT ON with multiple expressions before PostgreSQL 15, or COPY ... WHERE can trigger 0A000. Version-specific gaps are the most common root cause.
Running a command inside a restrictive context, such as a read-only replica or a WAL-replication session, also throws feature_not_supported because certain write operations are disallowed.
First, identify the exact clause PostgreSQL rejected by checking the error cursor position. Consult the release notes to verify if a newer version adds support.
If so, plan an upgrade.
When upgrading is impossible, rewrite the query. For example, split a MERGE into INSERT ... ON CONFLICT and UPDATE statements. Alternatively, load the required extension (e.g., pgcrypto) with CREATE EXTENSION.
Attempting logical replication on a sequence table returns 0A000. Work around it by replicating the owning table only.
Calling set_config from a sandboxed PL/pgSQL function on a managed cloud service fails with 0A000.
Ask the provider to enable the function or use session variables instead.
Pin application code to the minimum PostgreSQL version in production and lint queries against that version in CI.
Galaxys context-aware AI reminds developers when a clause is unsupported.
Enable pg_hint_plan or EXPLAIN before rollout to detect unsupported features at deploy time rather than in production.
SQLSTATE 0A001 (invalid_transaction_state) appears when you attempt an operation disallowed in the current transaction isolation level. Adjust the isolation level.
SQLSTATE 0A002 (dependent_privilege_types) surfaces when revoking privileges that other objects rely on. Drop the dependent objects first.
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Query relies on syntax such as MERGE that did not exist in the server's current version.
Standby servers reject INSERT, UPDATE, DELETE, and DDL, returning 0A000.
Functions like pgp_sym_encrypt need the pgcrypto extension; missing extension triggers the error.
Certain commands (e.g., VACUUM FULL) cannot run inside BEGIN/COMMIT and produce 0A000.
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No. The server skips executing the unsupported feature, so ignoring the error leaves the operation incomplete. Always resolve the root cause.
Most extensions have negligible overhead when idle. Measure performance after enabling to ensure it meets your requirements.
Galaxys SQL linter flags clauses unsupported by your configured PostgreSQL version and suggests rewrites, reducing runtime errors.
Minor upgrades are backward compatible. For major upgrades, review release notes and test in staging before production rollout.
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