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Returns information about the WAL summary files present in the data directory, under pg_wal/summaries. One row will be returned per WAL summary file. Each file summarizes WAL on the indicated TLI within the indicated LSN range. This function might be useful to determine whether enough WAL summaries are present on the server to take an incremental backup based on some prior backup whose start LSN is known.

English manual coverage begins with PostgreSQL 7.1. Source history and runtime observations have their own recorded version boundaries.

group

info

group label

系统信息函数和操作符

lang

en

layout

table-new

pages

functions-info.html

prose only

false

pg_available_wal_summaries () → setof record ( tli bigint, start_lsn pg_lsn, end_lsn pg_lsn ) → setof record

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