SQLSTATE 01P01 warns that your query uses a feature that has been deprecated and may be removed in future PostgreSQL releases.
PostgreSQL Error 01P01 deprecated_feature appears when a query references syntax, functions, or configuration parameters slated for removal. Update the statement to the supported alternative or enable the newer setting, then rerun the query to resolve the warning.
PostgreSQL Error 01P01
PostgreSQL raises SQLSTATE 01P01 when your session executes a feature that has been marked deprecated. The message is a warning, not a hard error, but it flags code that could break after you upgrade PostgreSQL.
The notice typically shows as WARNING: deprecated feature used followed by additional context.
Treating this early prevents production downtime during version upgrades.
The server emits 01P01 when legacy syntax, functions, operators, or configuration parameters are still referenced. Examples include outdated JOIN syntax, obsolete VACUUM options, or parameters renamed in recent releases.
Extensions compiled for older server versions can also trigger the warning when they call removed internal functions.
Locate the deprecated construct in the query text or configuration file.
Replace it with the supported alternative documented in release notes. Rerun the statement to verify the warning disappears.
If the notice originates inside an extension, recompile or upgrade the extension package to one built for the target PostgreSQL version.
Deprecated VACUUM FULL syntax: swap to VACUUM (FULL) table_name. Deprecated join operator *=: rewrite using LEFT JOIN ... ON. Deprecated parameter checkpoint_segments: use max_wal_size instead.
Each change silences 01P01.
When migrating from 12 to 13, calling pg_catalog.pg_stat_file with missing arguments triggers 01P01. Supply the new required arguments.
Read major release notes before upgrading and search codebase for deprecated items. Run pg_upgrade --check or pg_dump/restore on staging to surface 01P01 warnings early.
Adopt continuous integration that runs tests against the upcoming PostgreSQL version.
Tools like Galaxy’s static analysis highlight deprecated keywords as you type, cutting feedback loops.
SQLSTATE 42704 undefined_object appears when the object is missing entirely, not just deprecated. SQLSTATE 42883 undefined_function fires when a function call is unrecognized. Both require creating or replacing the missing entity rather than updating syntax.
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No. It is a warning. The query still executes, but you should fix it before upgrading PostgreSQL.
Run SHOW ALL and compare results to the release notes. Tools like pg_settings help list current values.
Set client_min_messages to error, but this hides useful alerts. Prefer updating code.
Galaxy’s SQL editor highlights deprecated keywords in real time and offers AI suggestions for supported syntax, reducing 01P01 occurrences.
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