SQLSTATE 01008 WARNING Class 01: Warning

implicit_zero_bit_padding Implicit Zero Bit Padding — SQLSTATE 01008

SQLSTATE 01008 (implicit_zero_bit_padding): The statement succeeded but the server attached a warning.

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Last reviewed May 2025 Grounded in source

Symptoms

The server reports SQLSTATE 01008 (implicit_zero_bit_padding), a condition in the Warning class.

  • The error is written to the server log and returned to the client carrying SQLSTATE 01008.
  • Any driver (libpq, JDBC, psycopg, npgsql, pgx) surfaces this code in its error object so you can branch on it programmatically.

Environment

Severity: WARNING  |  PostgreSQL versions: 12, 13, 14, 15, 16, 17

Reproduce with the exact statement and read the full message in the server log (raise log_min_messages / set log_min_error_statement for more context).

Root Cause

01008 belongs to Class 01 — Warning. In this class, the statement succeeded but the server attached a warning.

The first two characters (01) identify the error class, so application code can match the whole class via 01000 when the specific code is not needed.

Diagnostic Queries

Recovery

Read the warning text — the statement completed, but review the data or query it flagged (truncation, deprecated feature, eliminated nulls) before relying on the result.

Reference: PostgreSQL error codes — Class 01 (Warning).

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