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--- db:postgresql [15.06.2023 11:18] – kubada
+++ db:postgresql [27.06.2024 11:26] (текущий) – kubada
@@ Строка 1: / Строка 1: @@
+=== Ошибка Stale postmaster.pid file ===
+<code bash>
+cd /Users/$USER/Library/Application\ Support/Postgres/
+ls
+rm var-14/postmaster.pid
+</code>
+----
 === Преобразовать тип колонки из text в datetime ===
 <code sql>
-ALTER TABLE %table% ALTER COLUMN %column% type TIMESTAMP without time zone
+ALTER TABLE {table} ALTER COLUMN {column} type TIMESTAMP without time zone
-using ("%column%"::text::timestamptz);
+using ("{column}"::text::timestamptz);
 </code>
@@ Строка 17: / Строка 26: @@
 === row_id ===
 <code sql>
-CREATE TABLE "tablename" (
+CREATE TABLE {table} (
 	"id" SERIAL PRIMARY KEY,
 	lalala
@@ Строка 24: / Строка 33: @@
 <code sql>
-ALTER TABLE tablename
+ALTER TABLE {table}
 ADD COLUMN id SERIAL PRIMARY KEY;
+</code>
+----
+=== выбор даты минус n дней ===
+<code sql>
+SELECT * FROM {table} WHERE date > current_date - interval '30' day
+</code>
+----
+=== ERROR: encoding UTF8 does not match locale en_US Detail: The chosen LC_CTYPE setting requires encoding LATIN1. ===
+<code sql>
+postgres=# UPDATE pg_database SET datistemplate = FALSE WHERE datname = 'template1';
+postgres=# DROP DATABASE Template1;
+postgres=# CREATE DATABASE template1 WITH owner=postgres ENCODING = 'UTF-8' lc_collate = 'en_US.utf8' lc_ctype = 'en_US.utf8' template template0;
+postgres=# UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template1';
+</code>
+----
+=== Backup ===
+<code bash>
+##############################
+## POSTGRESQL BACKUP CONFIG ##
+##############################
+# Optional system user to run backups as.  If the user the script is running as doesn't match this
+# the script terminates.  Leave blank to skip check.
+BACKUP_USER=
+# Optional hostname to adhere to pg_hba policies.  Will default to "localhost" if none specified.
+HOSTNAME=
+# Optional username to connect to database as.  Will default to "postgres" if none specified.
+USERNAME=
+# This dir will be created if it doesn't exist.  This must be writable by the user the script is
+# running as.
+BACKUP_DIR=/home/backups/database/postgresql/
+# List of strings to match against in database name, separated by space or comma, for which we only
+# wish to keep a backup of the schema, not the data. Any database names which contain any of these
+# values will be considered candidates. (e.g. "system_log" will match "dev_system_log_2010-01")
+SCHEMA_ONLY_LIST=""
+# Will produce a custom-format backup if set to "yes"
+ENABLE_CUSTOM_BACKUPS=yes
+# Will produce a gzipped plain-format backup if set to "yes"
+ENABLE_PLAIN_BACKUPS=yes
+# Will produce gzipped sql file containing the cluster globals, like users and passwords, if set to "yes"
+ENABLE_GLOBALS_BACKUPS=yes
+#### SETTINGS FOR ROTATED BACKUPS ####
+# Which day to take the weekly backup from (1-7 = Monday-Sunday)
+DAY_OF_WEEK_TO_KEEP=5
+# Number of days to keep daily backups
+DAYS_TO_KEEP=7
+# How many weeks to keep weekly backups
+WEEKS_TO_KEEP=5
+######################################
+</code>
+<code bash>
+#!/bin/bash
+###########################
+####### LOAD CONFIG #######
+###########################
+while [ $# -gt 0 ]; do
+        case $1 in
+                -c)
+                        if [ -r "$2" ]; then
+                                source "$2"
+                                shift 2
+                        else
+                                ${ECHO} "Unreadable config file \"$2\"" 1>&2
+                                exit 1
+                        fi
+                        ;;
+                *)
+                        ${ECHO} "Unknown Option \"$1\"" 1>&2
+                        exit 2
+                        ;;
+        esac
+done
+if [ $# = 0 ]; then
+        SCRIPTPATH=$(cd ${0%/*} && pwd -P)
+        source $SCRIPTPATH/pg_backup.config
+fi;
+###########################
+#### PRE-BACKUP CHECKS ####
+###########################
+# Make sure we're running as the required backup user
+if [ "$BACKUP_USER" != "" -a "$(id -un)" != "$BACKUP_USER" ]; then
+	echo "This script must be run as $BACKUP_USER. Exiting." 1>&2
+	exit 1;
+fi;
+###########################
+### INITIALISE DEFAULTS ###
+###########################
+if [ ! $HOSTNAME ]; then
+	HOSTNAME="localhost"
+fi;
+if [ ! $USERNAME ]; then
+	USERNAME="postgres"
+fi;
+###########################
+#### START THE BACKUPS ####
+###########################
+FINAL_BACKUP_DIR=$BACKUP_DIR"`date +\%Y-\%m-\%d`/"
+echo "Making backup directory in $FINAL_BACKUP_DIR"
+if ! mkdir -p $FINAL_BACKUP_DIR; then
+	echo "Cannot create backup directory in $FINAL_BACKUP_DIR. Go and fix it!" 1>&2
+	exit 1;
+fi;
+#######################
+### GLOBALS BACKUPS ###
+#######################
+echo -e "\n\nPerforming globals backup"
+echo -e "--------------------------------------------\n"
+if [ $ENABLE_GLOBALS_BACKUPS = "yes" ]
+then
+        echo "Globals backup"
+        set -o pipefail
+        if ! pg_dumpall -g -h "$HOSTNAME" -U "$USERNAME" | gzip > $FINAL_BACKUP_DIR"globals".sql.gz.in_progress; then
+                echo "[!!ERROR!!] Failed to produce globals backup" 1>&2
+        else
+                mv $FINAL_BACKUP_DIR"globals".sql.gz.in_progress $FINAL_BACKUP_DIR"globals".sql.gz
+        fi
+        set +o pipefail
+else
+	echo "None"
+fi
+###########################
+### SCHEMA-ONLY BACKUPS ###
+###########################
+for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
+do
+	SCHEMA_ONLY_CLAUSE="$SCHEMA_ONLY_CLAUSE or datname ~ '$SCHEMA_ONLY_DB'"
+done
+SCHEMA_ONLY_QUERY="select datname from pg_database where false $SCHEMA_ONLY_CLAUSE order by datname;"
+echo -e "\n\nPerforming schema-only backups"
+echo -e "--------------------------------------------\n"
+SCHEMA_ONLY_DB_LIST=`psql -h "$HOSTNAME" -U "$USERNAME" -At -c "$SCHEMA_ONLY_QUERY" postgres`
+echo -e "The following databases were matched for schema-only backup:\n${SCHEMA_ONLY_DB_LIST}\n"
+for DATABASE in $SCHEMA_ONLY_DB_LIST
+do
+	echo "Schema-only backup of $DATABASE"
+	set -o pipefail
+	if ! pg_dump -Fp -s -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" | gzip > $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress; then
+		echo "[!!ERROR!!] Failed to backup database schema of $DATABASE" 1>&2
+	else
+		mv $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz.in_progress $FINAL_BACKUP_DIR"$DATABASE"_SCHEMA.sql.gz
+	fi
+	set +o pipefail
+done
+###########################
+###### FULL BACKUPS #######
+###########################
+for SCHEMA_ONLY_DB in ${SCHEMA_ONLY_LIST//,/ }
+do
+	EXCLUDE_SCHEMA_ONLY_CLAUSE="$EXCLUDE_SCHEMA_ONLY_CLAUSE and datname !~ '$SCHEMA_ONLY_DB'"
+done
+FULL_BACKUP_QUERY="select datname from pg_database where not datistemplate and datallowconn $EXCLUDE_SCHEMA_ONLY_CLAUSE order by datname;"
+echo -e "\n\nPerforming full backups"
+echo -e "--------------------------------------------\n"
+for DATABASE in `psql -h "$HOSTNAME" -U "$USERNAME" -At -c "$FULL_BACKUP_QUERY" postgres`
+do
+	if [ $ENABLE_PLAIN_BACKUPS = "yes" ]
+	then
+		echo "Plain backup of $DATABASE"
+		set -o pipefail
+		if ! pg_dump -Fp -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" | gzip > $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress; then
+			echo "[!!ERROR!!] Failed to produce plain backup database $DATABASE" 1>&2
+		else
+			mv $FINAL_BACKUP_DIR"$DATABASE".sql.gz.in_progress $FINAL_BACKUP_DIR"$DATABASE".sql.gz
+		fi
+		set +o pipefail
+	fi
+	if [ $ENABLE_CUSTOM_BACKUPS = "yes" ]
+	then
+		echo "Custom backup of $DATABASE"
+		if ! pg_dump -Fc -h "$HOSTNAME" -U "$USERNAME" "$DATABASE" -f $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress; then
+			echo "[!!ERROR!!] Failed to produce custom backup database $DATABASE" 1>&2
+		else
+			mv $FINAL_BACKUP_DIR"$DATABASE".custom.in_progress $FINAL_BACKUP_DIR"$DATABASE".custom
+		fi
+	fi
+done
+echo -e "\nAll database backups complete!"
 </code>
 ----