postgres

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Tomas Vondra 8ad51b5f44 Sample postgres_fdw tables remotely during ANALYZE When collecting ANALYZE sample on foreign tables, postgres_fdw fetched all rows and performed the sampling locally. For large tables this means transferring and immediately discarding large amounts of data. This commit allows the sampling to be performed on the remote server, transferring only the much smaller sample. The sampling is performed using the built-in TABLESAMPLE methods (system, bernoulli) or random() function, depending on the remote server version. Remote sampling can be enabled by analyze_sampling on the foreign server and/or foreign table, with supported values 'off', 'auto', 'system', 'bernoulli' and 'random'. The default value is 'auto' which uses either 'bernoulli' (TABLESAMPLE method) or 'random' (for remote servers without TABLESAMPLE support).		3 years ago
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expected	Sample postgres_fdw tables remotely during ANALYZE	3 years ago
sql	Sample postgres_fdw tables remotely during ANALYZE	3 years ago
.gitignore	Add postgres_fdw contrib module.	13 years ago
Makefile	postgres_fdw: Add function to list cached connections to foreign servers.	5 years ago
connection.c	Rename SetSingleFuncCall() to InitMaterializedSRF()	3 years ago
deparse.c	Sample postgres_fdw tables remotely during ANALYZE	3 years ago
meson.build	Add copyright notices to meson files	3 years ago
option.c	Sample postgres_fdw tables remotely during ANALYZE	3 years ago
postgres_fdw--1.0--1.1.sql	postgres_fdw: Add functions to discard cached connections.	4 years ago
postgres_fdw--1.0.sql	Add postgres_fdw contrib module.	13 years ago
postgres_fdw.c	Sample postgres_fdw tables remotely during ANALYZE	3 years ago
postgres_fdw.control	postgres_fdw: Add function to list cached connections to foreign servers.	5 years ago
postgres_fdw.h	Sample postgres_fdw tables remotely during ANALYZE	3 years ago
shippable.c	Update copyright for 2022	4 years ago