![]() Whenever a command is executed, psql also polls for asynchronous notification events generated by LISTEN and NOTIFY Of the command are displayed on the screen. If the command was sent and executed without error, the results Thus commands can be spread over several lines for clarity. Ordinarily, input lines are sent to the server when a command-terminating semicolon is reached. Testdb=>At the prompt, the user can type in SQL commands. Using this option is subtly different from writing psql. ![]() If filename is - (hyphen), then standard input is read. Is in many ways equivalent to the internal command \i. After the file is processed, psql terminates. f filename -file filename Use the file filename as the source of commands instead of reading commands interactively. To setting the variable ECHO_HIDDEN from within psql. You can use this to study psql's internal operations. E -echo-hidden Echo the actual queries generated by \d and other backslash commands. This is equivalent to setting the variable ECHO to queries. e -echo-queries Copy all SQL commands sent to the server to standard output as well. See in the documentation for more information. If this parameter contains an = sign, it is treated as a conninfo string. This is equivalent to specifying dbname as the first non-option argument on the command line. d dbname -dbname dbname Specifies the name of the database to connect to. This is different from the behavior when the same string is fed to psql's If the command string contains multiple SQL commands, they are processed in a single transaction, unless there are explicit BEGIN/ COMMITĬommands included in the string to divide it into multiple transactions. This: echo '\x \\ SELECT * FROM foo ' | psql. To achieve that, you could pipe the string into psql, like Thus you cannot mix SQL and psql meta-commands with this option. This is useful in shell scripts.Ĭommand must be either a command string that is completely parsable by the server (i.e., it contains no psql specific features), or a singleīackslash command. ![]() c command -command command Specifies that psql is to execute one command string, command, and then exit. (The default output mode is otherwise aligned.) A -no-align Switches to unaligned output mode. This is more useful for script processing rather than interactive mode. Options -a -echo-all Print all input lines to standard output as they are read. Scripts and automating a wide variety of tasks. ![]() In addition, it provides a number of meta-commands and various shell-like features to facilitate writing It enables you to type in queries interactively, issue them to PostgreSQL, and see the query This is psql 8.0.3, the PostgreSQL interactive terminal.Psql is a terminal-based front-end to PostgreSQL. Which leads to this output from the Postgresql 8.0.3 client: Now, if for some reason none of those options work for you, you can get more help on the Postgresql client by typing this psql command: Psql -h myhost -d mydb -U myuser -W Postgres psql command help If for some reason you are not prompted for a password when issuing these commands, you can use the -W option, leading to these two command alternatives: If you need to log into a Postgres database on a server named myhost, you can use this Postgres login command: If you are logged into the same computer that Postgres is running on you can use the following psql login command, specifying the database ( mydb) and username ( myuser): Let's take a look at a few psql command line options you can use. To log into a Postgres database from the command line, use the psql command. Postgresql (Postgres) login FAQ: How do I log into a Postgres database from the command line?
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