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#!/bin/bash -e
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. "$(dirname "${BASH_SOURCE[0]}")"/util.sh
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.rel sync.sh
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if self_not_included; then
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# using prefixed connection vars
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alias ssh2local='declare prefix=ssh_; import_vars; unset prefix
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declare $(prefix=ssh_ get_prefix_vars); unset $(prefix=ssh_ get_prefix_vars)'
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alias use_local='declare prefix=local_; import_vars; unset prefix'
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alias use_remote='declare prefix=remote_; import_vars; unset prefix'
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alias use_local_remote='{ use_remote; use_local; }'
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# *must* be run inside a function
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alias use_root='declare prefix=root_; import_vars; unset prefix'
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quote='"'
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esc_name() { echo "$quote${1//$quote/$quote$quote}$quote"; }
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mk_esc_name_alias() # usage: mk_esc_name_alias schema_esc
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{ alias mk_"$1"='declare '"$1"'="${'"$1"':-$(esc_name "$'"${1%_esc}"'")}"; '\
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'echo_vars '"$1"; }
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mk_esc_name_alias schema_esc
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mk_esc_name_alias table_esc
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fi # load new aliases
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if self_being_included; then
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skip_table() # usage: create_table || table=... skip_table || return 0
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{ what="table $table" already_exists_msg; }
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: "${test=$(isset limit; exit2bool)}" # test mode when using limited # rows
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# usage: (set_large_table; to_file db_cmd...) || return
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alias set_large_table='declare del="${del-$(test "$limit"; exit2bool)}"
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echo_vars del'
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limit() # usage: "query... $([prefix=$'| |\n'] [limit|n=#] limit)"
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{
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echo_func; kw_params prefix; local prefix="${prefix-
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}"
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if isset n; then local limit="${limit-$n}"; fi
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echo -n "${limit:+${prefix}LIMIT $limit}"
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}
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cols2list() # usage: cols2list col...
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{ echo_func; cmd=esc_name foreach_arg; delim=', ' join "$@"; }
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mk_select() # usage: {query=... | table=... [cols=...] [filter=...] \
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# [order_by=...]} [limit|n=#] mk_select
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{
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echo_func; kw_params query table cols filter; mk_table_esc
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if is_array cols ; then cols="$( cols2list "${cols[@]}" )"; fi
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if is_array order_by; then order_by="$(cols2list "${order_by[@]}")"; fi
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echo "$(rtrim "${query:-SELECT ${cols:-*} ${cols:+
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}FROM $table_esc
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${filter:+WHERE $filter
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}${order_by:+ORDER BY $order_by
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}}")\
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$(limit)"
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}
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# export func usage: export_func() { ...; mk_select_var; ... }
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# caller usage: {query=... | table=... [cols=...] [filter=...]} export_func
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# cmd line usage: [limit=...] caller
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alias mk_select_var='declare query="$(mk_select)"'
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fi # load new aliases
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if self_being_included; then
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mk_drop() # usage: table=... mk_drop|*sql_ANSI
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{
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log_local; log++; echo_func; kw_params table; : "${table?}"; mk_table_esc
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echo "DROP TABLE IF EXISTS $table_esc"
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}
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mk_truncate() # usage: table=... mk_truncate|*sql_ANSI
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{
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log_local; log++; echo_func; kw_params table; : "${table?}"; mk_table_esc
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echo "TRUNCATE $table_esc"
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}
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### MySQL
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alias set_database=\
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'if test "$schema"; then declare database="${database-$schema}"; fi'
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fi # load new aliases
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if self_being_included; then
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# usage: mysql*() { ...; mysql_cmd "$@"; } (with alias)
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# caller usage: [ssh_server=...] [server=...] [user=...] [password=...] mysql*()
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function mysql_cmd() # usage: mysql*() { ...; mysql_cmd cmd "$@"; }
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# auto-adds connection/login opts when specified
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{
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echo_func
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local cmd="$1"; shift
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local ssh_server="$(localize_url "$ssh_server")"
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local server="$(localize_url "$server")"
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if test "$ssh_server"; then
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local ssh_dest="${ssh_dest-${ssh_user:+$ssh_user@}$ssh_server}"
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fi
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local var=ssh_dest; local_inv
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command "time" ${ssh_dest:+ssh "$ssh_dest" }"$cmd" \
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${server:+ --host="$server" }${user:+--user="$user" } --password\
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${password+="$password"} --quick "$@" # --quick: don't buffer entire result
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}
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alias mysql_cmd='mysql_cmd "$FUNCNAME"'
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fi # load new aliases
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if self_being_included; then
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function mysql() # usage: [database=...] [data_only=1] [log_queries=] mysql ...
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{
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echo_func; kw_params output_data data_only query_verbosity
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if test "$data_only"; then local output_data="${output_data-1}"; fi
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local log_queries="${log_queries-1}"
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set_database
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set -- ${database:+--database="$database" }--local-infile=1 \
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--${data_only:+skip-}column-names "$@"
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if test "$output_data"; then echo_stdin|mysql_cmd --batch "$@"
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else cmd_log_fd=1 mysql_cmd ${log_queries:+--verbose --verbose --verbose }\
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"$@" # --verbose*3: echo runtimes
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fi
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}
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mysql_ANSI()
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{
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echo_func
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(echo "SET sql_mode = 'ANSI';"; cat)|mysql "$@"
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}
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# always use ANSI mode, to support "" identifiers. `` *are* still supported in
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# this mode, so it also works with SHOW CREATE TABLE output and dumpfiles.
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alias mysql='mysql_ANSI'
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fi # load new aliases
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if self_being_included; then
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mysql_root() { echo_func; use_root; mysql "$@"; }
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mysql_truncate() { echo_func; mk_truncate|mysql; }
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mysql_import() # usage: table=... [cols=...] [append=1] mysql_import <file
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# without append=1, first ensures the table is empty
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{
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echo_func
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mk_table_esc
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local mysql_load_data_format="${mysql_load_data_format-\
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FIELDS TERMINATED BY ','
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OPTIONALLY ENCLOSED BY '\"'
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}"
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if test ! "$append"; then mysql_truncate; fi
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mysql_load_data_format="${mysql_load_data_format%
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}"
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ssh2local # ssh does not tunnel nonstandard fds
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mysql "$@" 40<&0 <<EOF
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LOAD DATA LOCAL INFILE '/dev/fd/40'
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${append:+IGNORE }INTO TABLE $table_esc
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$mysql_load_data_format
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IGNORE 1 LINES
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EOF
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}
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mysql_export() # does not support CSV
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# caller usage: [database=...] {query=... | table=... [cols=...] [filter=...]} \
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# mysql_export
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# cmd line usage: [limit=...] caller
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{
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echo_func
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mk_select_var
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output_data=1 mysql "$@" <<<"$query"
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}
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mysql_export_outfile() # supports CSV, but requires the FILE privilege
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{
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echo_func
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: "${file:?}"
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mk_select_var
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local mysql_load_data_format="${mysql_load_data_format-\
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FIELDS TERMINATED BY ','
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OPTIONALLY ENCLOSED BY '\"'
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}"
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local head="${query%%FROM*}" # includes trailing newline
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head="${head%
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}"
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local tail="${query#$head}"
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mysql_load_data_format="${mysql_load_data_format%
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}"
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mysql "$@" <<EOF
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$head
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INTO OUTFILE '$file'
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$mysql_load_data_format
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$tail
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EOF
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}
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## backups
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mysqldump() # usage: [schema=1 | data=1] [create_db=1] mysqldump db [table...]
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{
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echo_func
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echo_vars schema data create_db
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local var=create_db; local_inv
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mysql_cmd ${database:+--databases "$database" ${no_create_db:+--tables }} \
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--lock-tables=false --set-charset \
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${postgres_compat:+${data:+--compatible=postgresql }--add-locks=false }\
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${schema:+--no-data }${data:+--no-create-info }"$@"
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}
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mysqldump_diffable()
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{
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echo_func
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mysqldump "$@"|{ pipe_delay; echo_run sed 's/^(-- Dump completed).*$/\1/'; }
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}
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mysql_rm_privileged_statements()
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{
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echo_func
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grep -vE -e '^/\*!40000 ALTER TABLE `.*` (DIS|EN)ABLE KEYS \*/;$' \
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-e '^(UN)?LOCK TABLES( `.*` WRITE)?;$'
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}
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## permissions
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mysql_seal_table() # usage: table=... user=... mysql_seal_table
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# prevents further modifications to a table by a user
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{
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echo_func; kw_params table user; : "${table:?}" "${user:?}"; mk_table_esc
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benign_error=1 mysql_root <<<"REVOKE ALL PRIVILEGES ON $table FROM '$user'@'%'" || true
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benign_error=1 mysql_root <<<"REVOKE GRANT OPTION ON $table FROM '$user'@'%'" || true
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}
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## server admin
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mysql_ctl() # usage: mysql_ctl {start|stop|restart|...}
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{
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247
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echo_func
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pattern='^stop: Unknown instance:' ignore_e=1 ignore_err_msg \
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sudo service mysql "$@" # ignore errors if not running
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}
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mysql_snapshot() # usage: [live=] [from=...] [to=...] mysql_snapshot rsync_opts
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253
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{
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254
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echo_func; kw_params from to; local from="${from:-/var/lib/mysql}"
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ctl=mysql_ctl db_snapshot "$@"
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}
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258
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259
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### PostgreSQL
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260
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261
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alias use_pg='declare prefix=pg_; import_vars; unset prefix'
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262
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263
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fi # load new aliases
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264
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if self_being_included; then
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265
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# usage: pg_*() { ...; pg_cmd "$@"; } (uses alias)
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267
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function pg_cmd() # usage for fn: pg_*() { ...; pg_cmd cmd "$@"; }
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# auto-adds connection/login opts when specified
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{
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270
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echo_func; kw_params as_root
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use_pg
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log_local
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log--
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if test "$server"; then local PGHOST="$server"; export PGHOST; fi
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if test "$user"; then local PGUSER="$user"; export PGUSER; fi
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if test "$password"; then local PGPASSWORD="$password"; log++ export PGPASSWORD;fi
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if test "$database"; then local PGDATABASE="$database"; export PGDATABASE;fi
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log++
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280
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281
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time if test "$as_root"; then sudo -u postgres "$@"; else command "$@"; fi
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282
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}
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283
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alias pg_cmd='"pg_cmd" "${FUNCNAME%%__*}"'
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284
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285
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fi # load new aliases
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286
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if self_being_included; then
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287
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288
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psql() # usage: [stdin=copy_pstdin_file|<(pstdin_cmd)] [output_data=1] psql \
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# <<<"cmds (eg. \copy from pstdin)"
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290
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# $as_root: when on, avoids redirections as these are not passed through by sudo
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291
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# SUDO_USER: when set, avoids outputting to /dev/fd/#, because this causes a
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292
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# "Permission denied" error when running as sudo on Linux
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293
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{
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294
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echo_func; kw_params stdin output_data
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295
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local can_redir="$(! test "$as_root" && ! isset SUDO_USER; exit2bool)"
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296
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echo_vars can_redir
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297
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if test "$stdin"; then
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298
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test "$can_redir" || die 'custom $stdin not supported with sudo'
|
299
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fi
|
300
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local verbose_="$(test "$can_redir" && can_log; exit2bool)"
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301
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echo_vars verbose_
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302
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local data2stdout="$(test "$output_data" -a "$can_redir"; exit2bool)"
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303
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echo_vars data2stdout
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304
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|
305
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if test "$verbose_"; then set -- --echo-all --echo-hidden "$@"; fi
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306
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if test "$can_redir"; then
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307
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local redirs=("${redirs[@]}" '40<&0' "0<${stdin:-&20}" '41>&1')
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308
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fi
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309
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(
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310
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# hide stack traces/DETAIL sections of error messages at verbosity <2
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311
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if ! log++ can_log; then echo '\set VERBOSITY terse'; fi
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312
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if test "$verbose_"; then echo '\timing on'; fi
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313
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echo "SET client_min_messages = \
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314
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$(if test "$verbose_"; then echo NOTICE; else echo WARNING; fi);"
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315
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cat
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316
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)|cmd_log_fd=${can_redir:+1} pg_cmd ${can_redir:+--file /dev/fd/40 }\
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317
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${data2stdout:+--output /dev/fd/41 }--set ON_ERROR_STOP=1 --quiet "$@"\
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318
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|| verbosity_min=2 die_error_hidden
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319
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# --output is for query *results*, not echoed statements
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320
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}
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321
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322
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pg_export() # usage: mk_select_opts... [pg_copy_format=CSV...] pg_export >out
|
323
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{
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324
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echo_func
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325
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mk_select_var
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326
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local pg_copy_format="${pg_copy_format-CSV HEADER}"
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327
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|
328
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output_data=1 psql "$@" <<<"COPY ($query) TO STDOUT $pg_copy_format;"
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329
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}
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330
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|
331
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pg_header()
|
332
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{
|
333
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echo_func
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334
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local pg_copy_format="CSV HEADER" limit=0
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335
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pg_export "$@"|echo_stdout
|
336
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}
|
337
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|
338
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pg_export_table_no_header()
|
339
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{
|
340
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echo_func
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341
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local pg_copy_format="CSV"
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342
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pg_export "$@"
|
343
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}
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344
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|
345
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pg_export_table_to_dir()
|
346
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{
|
347
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echo_func
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348
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local table="$1"; shift; mk_table_esc
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349
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stdout="$exports_dir/$table.csv" to_file pg_export "$@"
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350
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}
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351
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|
352
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pg_export_table_to_dir_no_header()
|
353
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{
|
354
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echo_func
|
355
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local table="$1"; shift; mk_table_esc
|
356
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stdout="$exports_dir/$table.no_header.cols=$(pg_header).csv" to_file \
|
357
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pg_export_table_no_header "$@"
|
358
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}
|
359
|
|
360
|
## backups
|
361
|
|
362
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pg_dump() # usage: database={...|} [schema=...] [struct=1 | data=1] [owners=1] \
|
363
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# [compress=1] [create_schema=] [users=1] pg_dump [opts...] >out
|
364
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# database='': entire cluster
|
365
|
{
|
366
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echo_func;kw_params database struct data owners compress create_schema users
|
367
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: "${database?}"
|
368
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local create_schema="${create_schema-1}"
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369
|
|
370
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# subset
|
371
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if test "$schema"; then set -- --schema="\"$schema\"" "$@"; fi
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372
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if test "$struct"; then set -- "$@" --schema-only; fi
|
373
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if test "$data" ; then set -- "$@" --data-only ; fi
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374
|
|
375
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if test "$database"; then # just one DB
|
376
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# format
|
377
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if test ! "$owners"; then set -- "$@" --no-owner ; fi
|
378
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if test "$compress"; then set -- "$@" --format=custom --compress=9
|
379
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else set -- "$@" --format=plain --inserts
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380
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fi
|
381
|
|
382
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(
|
383
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# filter output
|
384
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if test ! "$create_schema"; then
|
385
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fd=1 redirs= filter_fd sed 's/^CREATE SCHEMA/--&/'
|
386
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fi
|
387
|
|
388
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pattern='^pg_dump: No matching tables were found$' ignore_err_msg \
|
389
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pg_cmd "$@"
|
390
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)
|
391
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else # entire cluster
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392
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# subset
|
393
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if test "$users"; then set -- "$@" --globals-only; fi
|
394
|
|
395
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(cd /; as_root=1 "pg_cmd" pg_dumpall "$@")
|
396
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fi
|
397
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}
|
398
|
|
399
|
## DB structure
|
400
|
|
401
|
benign_does_not_exist_error() # usage: type=what benign_does_not_exist_error cmd
|
402
|
{
|
403
|
log-- echo_func; : "${type:?}"
|
404
|
pattern="$type .* does not exist" benign_error=1 ignore_err_msg "$@"
|
405
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# no ignore_e=3, because this exit status also used for other errors
|
406
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}
|
407
|
|
408
|
pg_schema_exists() # usage: schema=__ [benign_error=1] pg_schema_exists
|
409
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{
|
410
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log-- echo_func; : "${schema:?}"; mk_schema_esc
|
411
|
# produces error both if true and if false
|
412
|
pattern='cannot create temporary relation in non-temporary schema' \
|
413
|
ignore_e=3 type=schema stderr_matches benign_does_not_exist_error \
|
414
|
psql <<<"CREATE TEMP TABLE $schema_esc.t ()"
|
415
|
}
|
416
|
|
417
|
public_schema_exists() { log-- echo_func; schema=public pg_schema_exists; }
|
418
|
|
419
|
pg_require_schema() # usage: schema=... pg_require_schema
|
420
|
{
|
421
|
echo_func; : "${schema:?}"
|
422
|
pg_schema_exists || die "schema $schema does not exist"
|
423
|
}
|
424
|
|
425
|
pg_table_exists() # usage: [schema=__] table=__ [benign_error=1] pg_table_exists
|
426
|
{
|
427
|
echo_func; : "${table:?}"; mk_table_esc
|
428
|
! pattern='relation .* does not exist' \
|
429
|
ignore_e=3 log++ stderr_matches psql <<<"SELECT NULL FROM $table_esc LIMIT 0"
|
430
|
}
|
431
|
|
432
|
## server admin
|
433
|
|
434
|
pg_ctl() # usage: pg_ctl {start|stop|restart|...}
|
435
|
{
|
436
|
echo_func
|
437
|
sudo service postgresql "$@"
|
438
|
}
|
439
|
|
440
|
pg_start_backup() # requires config `wal_level = archive|hot_standby`
|
441
|
{ echo_func; as_root=1 psql <<<"SELECT pg_start_backup('backup', true);"; }
|
442
|
|
443
|
pg_stop_backup() # requires pg_start_backup() to have run
|
444
|
{ echo_func; as_root=1 psql <<<"SELECT pg_stop_backup();"; }
|
445
|
|
446
|
pg_snapshot() # usage: [live=] [from=...] [to=...] pg_snapshot rsync_opts...
|
447
|
{
|
448
|
echo_func; kw_params from to; local from="${from:-/var/lib/postgresql}"
|
449
|
|
450
|
if pg_start_backup; then # perform online backup
|
451
|
try db_copy "$@"
|
452
|
pg_stop_backup
|
453
|
end_try
|
454
|
else ctl=pg_ctl db_snapshot "$@" # fall back to stopping server
|
455
|
fi
|
456
|
}
|
457
|
|
458
|
fi
|