The extension uses a PL/PgSQL trigger based system to record and provide access to the row revisions Retrieving table comments. For example 10:20:10,14,15 means xmin=10, xmax=20, xip_list=10, 14, 15. column_name , ' table ' ) AS col, d . The pretty-printed format is more readable, but the default format is more likely to be interpreted the same way by future versions of PostgreSQL; avoid using pretty-printed output for dump purposes. pg_get_function_identity_arguments returns the argument list necessary to identify a function, in the form it would need to appear in within ALTER FUNCTION, for instance. The two-parameter form of obj_description returns the comment for a database object specified by its OID and the name of the containing system catalog. The table will be owned by the user issuing the command. Depending on the type of the object (table, function, etc.,), privileges are applied to the object. When specifying by name, the name can be schema-qualified if necessary. The new-column-name is the name of the new column to be added. Table 9-58 lists functions that allow the user to query object access privileges programmatically. This documentation is for an unsupported version of PostgreSQL. current_schemas(boolean) returns an array of the names of all schemas presently in the search path. \dt *. We hate spam and make it easy to unsubscribe. This is useful to determine the identity of an object as stored in the pg_depend catalog. Table 9-59 shows functions that determine whether a certain object is visible in the current schema search path. Table 9-63. The desired access privilege type must evaluate to some combination of SELECT, INSERT, UPDATE, or REFERENCES. We have using stud2 and student table to describe the example of alter column in PostgreSQL are as follows. This information is intended to be machine-readable, and is never translated. pg_tablespace_databases allows a tablespace to be examined. It is deprecated since there is no guarantee that OIDs are unique across different system catalogs; therefore, the wrong comment might be returned. Once you have created another database you will want to switch to it in … When we are specifying the table's structure using the CREATE TABLE command, we can generally use the CHECK constraint.. In MySQL, the DESCRIBE statement is used to get detailed information on a table or column. Table 9-60 lists functions that extract information from the system catalogs. The returned values are the ones that would be used in system catalogs such as pg_depend and can be passed to other system functions such as pg_identify_object or pg_describe_object. First, specify the name of the table that you want to insert data after the INSERT INTO keywords. CREATE TABLE is a keyword, telling the database system to create a new table. PostgreSQL show tables using pg_catalog schema Another way to show tables in PostgreSQL is to use the SELECT statement to query data from the PostgreSQL catalog as follows: SELECT * FROM pg_catalog.pg_tables WHERE schemaname != 'pg_catalog' AND schemaname != 'information_schema'; The extension provides APIs for accessing snapshots of a table at certain revisions and the difference generated between any two given revisions. Third, supply a comma-separated list of rows after the VALUES keyword. pg_get_userbyid extracts a role's name given its OID. (Thus, there are actually six variants of has_table_privilege, which can be distinguished by the number and types of their arguments.) pg_typeof returns the OID of the data type of the value that is passed to it. Before we learn anything else, here's how to quit psql and return to the operating system prompt. pg_conf_load_time returns the timestamp with time zone when the server configuration files were last loaded. The copy command is very useful to import the data into the PostgreSQL table. The origin can read all of the columns from a table or only the specified columns from a table. pg_identify_object returns a row containing enough information to uniquely identify the database object specified by catalog OID, object OID and sub-object ID. The least you need to know about Postgres. The owner is usually the one who executed the creation statement. A database is a set of tables, information about those tables, information about users and their permissions, and much more. Create tables within databases After creating one or more databases, you can begin to define tables to store your data. Retrieving table comments. Description. Access Privilege Inquiry Functions. increments (); // add a string column called description table. Description COMMENT stores a comment about a database object. First, specify the name of the table that you want to insert data after the INSERT INTO keywords. pg_get_constraintdef, pg_get_indexdef, pg_get_ruledef, and pg_get_triggerdef, respectively reconstruct the creating command for a constraint, index, rule, or trigger. It also changes during the execution of functions with the attribute SECURITY DEFINER. The PostgreSQL CREATE TABLE AS statement is used to create a table from an existing table by copying the existing table's columns. They only provide useful data when track_commit_timestamp configuration option is enabled and only for transactions that were committed after it was enabled. ... and shobj_description (see Table 9-52). Make sure that both PostgreSQL and the psql command-line interface are installed on your machine. pg_postmaster_start_time returns the timestamp with time zone when the server started. Third, switch to the database that you want to work with e.g., dvdrental. The desired access privilege type must evaluate to USAGE. shobj_description is used just like obj_description except it is used for retrieving comments on shared objects. 6. Initially, the empty table in the current database is owned by the user issuing the command. Table 9-61. Postgres show tables is defined as list tables from a specific database or specific schema, we can retrieve a table from command as \dt and using … Object Information and Addressing Functions. pg_get_keywords returns a set of records describing the SQL keywords recognized by the server. : Servers + PostgreSQL 11 + Databases + MYDATABASENAME + Schemas + public + Tables + MYTABLENAME <-- click this tree element When the table is selected, open the SQL tab on the right. Its argument possibilities are analogous to has_table_privilege. Code #2 … pg_get_object_address returns a row containing enough information to uniquely identify the database object specified by its type and object name and argument arrays. The two-parameter form of obj_description returns the comment for a database object specified by its OID and the name of the containing system catalog. Now that we’ve set up our database, let’s create a PostgreSQL table that we can use to test our alternatives to the DESCRIBE statement. DROP TABLE removes tables from the database. Quitting pqsql. The owner is usually the one who executed the creation statement. For example, a table is said to be visible if its containing schema is in the search path and no table of the same name appears earlier in the search path. If the expression might contain Vars, specify the OID of the relation they refer to as the second parameter; if no Vars are expected, zero is sufficient. please use The to_regclass, to_regproc, to_regprocedure, to_regoper, to_regoperator, to_regtype, to_regnamespace, and to_regrole functions translate relation, function, operator, type, schema, and role names to objects of type regclass, regproc, regprocedure, regoper, regoperator, regtype, regnamespace, and regrole respectively. Thanks in Advance, Fariba-----(end of broadcast)----- To view the Description column for the placenames table, run the \d+ command in psql (here's a list of \d commands in psql). First as-yet-unassigned txid. Following example creates a table with name CRICKETERS in PostgreSQL. The standard specifies that a table can have at most one identity column. SELECT column_name FROM information_schema. In this article, we looked at these PostgreSQL DESCRIBE TABLE alternatives; with our examples to guide you, you’ll be able to retrieve the information you need about your own PostgreSQL tables. Try Fully-Managed CockroachDB, Elasticsearch, MongoDB, PostgreSQL (Beta) or Redis. The PostgreSQL object-relational database system provides reliability and data integrity. For example, obj_description(123456,'pg_class') would retrieve the comment for the table with OID 123456. Speak with an Expert for Free, --------+---------+-----------+----------+---------, --------+---------+-----------+----------+---------+----------+--------------+-------------, Introduction to the PostgreSQL DESCRIBE TABLE statement, Connect to a Postgres database using psql, Using the DESCRIBE TABLE SQL statement in psql, Use the ‘d’ command in psql to describe a Postgres table, Use a PostgreSQL table’s information_schema to describe the table, Conclusion to the PostgreSQL DESCRIBE TABLE statement, PostgreSQL SELECT First Record on an ObjectRocket Instance, PostgreSQL Insert for an ObjectRocket Instance, How to Use the Postgres COUNT on an ObjectRocket Instance, PostgreSQL UPSERT for an ObjectRocket Instance, How to use PostgreSQL UPDATE WHERE on an ObjectRocket Instance, How to Perform the PostgreSQL Coalesce in ObjectRocket Instance, How to Use the Postgres Similar To Operator on an ObjectRocket instance, How to Use the PostgreSQL in Docker in ObjectRocket Instance. select c.table_schema, st.relname as TableName, c.column_name, pgd.description from pg_catalog.pg_statio_all_tables as st inner join information_schema.columns c on c.table_schema = st.schemaname and c.table_name = st.relname left join pg_catalog.pg_description pgd on pgd.objoid=st.relid and pgd.objsubid=c.ordinal_position where st.relname = 'YourTableName'; You’ll use psql (aka the PostgreSQL interactive terminal) most of all because it’s used to create databases and tables, show information about tables, and even to enter information (records) into the database.. postgres=# CREATE TABLE customers (id INTEGER, status TEXT, arr NUMERIC) PARTITION BY LIST(status); CREATE TABLE postgres=# CREATE TABLE cust_active PARTITION OF customers FOR VALUES IN ('ACTIVE','RECURRING','REACTIVATED') PARTITION BY RANGE(arr); CREATE TABLE postgres=# CREATE TABLE cust_arr_small PARTITION OF cust_active FOR … Its argument possibilities are analogous to has_table_privilege, except that public is not allowed as a user name. The desired access privilege type must evaluate to USAGE. However, these functions export a 64-bit format that is extended with an "epoch" counter so it will not wrap around during the life of an installation. has_language_privilege checks whether a user can access a procedural language in a particular way. In this article, we’ll show you alternatives to the DESCRIBE TABLE SQL statement that can be used with psql. Table 9-58. The TRUNCATE TABLE statement is used to remove all records from a table or set of tables in PostgreSQL. CREATE TABLE will create a new, initially empty table in the current database. createTable ('meal', function (table) {// add an autoincrementing id column (serial type in Postgres) table. The function returns a value suitably formatted for passing to sequence functions (see Section 9.16). You can also get this information from server_version or for a machine-readable version, server_version_num. Before we learn anything else, here’s how to quit psql and return to the operating system prompt. Most of these functions come in two variants, one of which can optionally "pretty-print" the result. table_name - name of the table; Rows. Some of these databases (and the tables within) are updated automatically by PostgreSQL as you use them. Below is the table description of the student and stud2 table… exports. Below is the table description of the student and stud2 table. The issue we are facing is – referenced column needs to be an unique constraint – cannot create an unique constraint without including the partition key – partition key/column not in the referring table (that would be too easy) The main use of these functions is to determine which transactions were committed between two snapshots. One row represents one table; Scope of rows: all tables in the schema Richard Broersma Jr from the psql user interface, you can use the following command: \dt to list all table in the currently set schema \d [table_name] the see the table attributes \d+ [table_name] to see additional table attributes Regards, Richard Broersma Jr. For retrieving the table comment we just need to run a query using the obj_description() function. Its argument possibilities are analogous to has_table_privilege. PostgreSQL CREATE TABLE syntax Users can take better advantage of scaling by using declarative partitioning along with foreign tables using postgres_fdw. Even though there’s no specific PostgreSQL DESCRIBE TABLE command, there are still some easy ways to get the information you need about a Postgres table. MongoDB® is a registered trademark of MongoDB, Inc. Redis® and the Redis® logo are trademarks of Salvatore Sanfilippo in the US and other countries. schema. OR. Note: The search path can be altered at run time. Active txids at the time of the snapshot. Depending on the server configuration, the user may need to enter its password to connect to the psql terminal. Note that having any of these privileges at the table level implicitly grants it for each column of the table, so has_any_column_privilege will always return true if has_table_privilege does for the same arguments. classid is the OID of the system catalog containing the object; objid is the OID of the object itself, and objsubid is the sub-object ID, or zero if none. The one-parameter form of obj_description requires only the object OID. The first input parameter is a table name with optional schema, and the second parameter is a column name. type identifies the type of database object; object_names and object_args are text arrays that together form a reference to the object. Second, list the required columns or all columns of the table in parentheses that follow the table name. It can be useful when examining the contents of system catalogs. Here you want to use the "describe" command in Postgresql. To remove a comment, write NULL in place of the text string. columns WHERE TABLE_NAME = 'some_table'; Delete from table_name [ USING using-list ] where [ Condition ] Parameters. This is intended as a reference for socorro developers and analytics users. has_type_privilege checks whether a user can access a type in a particular way. Below is the parameter description syntax of import CSV into the PostgreSQL table. Schema Visibility Inquiry Functions. For functions and operators, an object in the search path is visible if there is no object of the same name and argument data type(s) earlier in the path. To display the specific objects populating the tablespace, you will need to connect to the databases identified by pg_tablespace_databases and query their pg_class catalogs. A version that supports finding the column names and types of a table in a specific schema, and uses JOINs without any subqueries. We use the following syntax to access a PostgreSQL database using the psql command-line interface: If prompted, input your password– you should then have access to the database and its tables. The two-parameter form of obj_description returns the comment for a database object specified by its OID and the name of the containing system catalog. In PostgreSQL, the equivalent of “desc” command is “\d” followed by the table … pg_get_expr decompiles the internal form of an individual expression, such as the default value for a column. When specifying a function by a text string rather than by OID, the allowed input is the same as for the regprocedure data type (see Section 8.18). Its components are described in Table 9-64. txid_snapshot's textual representation is xmin:xmax:xip_list. pg_my_temp_schema returns the OID of the current session's temporary schema, or zero if it has none (because it has not created any temporary tables). CREATE TABLE will create a new, initially empty table in the current database. Fortunately, there are a few simple PostgreSQL commands that can be used in place of DESCRIBE TABLE. If a schema name is given (for example, CREATE TABLE myschema.mytable ...) then the table is created in the specified schema. If no collation is derived for the argument expression, then a null value is returned. They are denoted by a backslash and then followed by the command and its arguments. For example, obj_description(123456,'pg_class') would retrieve the comment for the table with OID 123456. Normally it is equal to the session user, but it can be changed with SET ROLE. Meta-commands are commands that are evaluated by psql and often translated into SQL that is issued against the system tables on the server, saving administrators time when performing routine tasks. This association can be modified or removed with ALTER SEQUENCE OWNED BY. The desired access privilege type must evaluate to EXECUTE. (If the current session was alive at the time, this will be the time when the session itself re-read the configuration files, so the reading will vary a little in different sessions. This is the schema that will be used for any tables or other named objects that are created without specifying a target schema. pg_namespace and pg_user are two main tables that convey schema related information to us. As a database server, its primary function is to store data, securely and supporting best practices, and retrieve it later, as requested by other software applications, be it those on the same computer or those running on another computer across a network (including the Internet). Parameters. Its argument possibilities are analogous to has_table_privilege, with the addition that the column can be specified either by name or attribute number. For instance, if I want to see the comment created for the table user I just need to run the following query: If a schema name is given (for example, ... PostgreSQL allows a table to have more than one identity column. We can use any database name to show all tables from the database. Table 9-57 shows several functions that extract session and system information. An example is: has_foreign_data_wrapper_privilege checks whether a user can access a foreign-data wrapper in a particular way. Copy: This is a command in PostgreSQL used to import the data from the CSV file into the table. PostgreSQL and other relational database management systems use databases and tables to structure and organize their data. The internal transaction ID type (xid) is 32 bits wide and wraps around every 4 billion transactions. this form The table can be specified by name or by OID. Note that having any of these privileges at the table level implicitly grants it for each column of the table. The functions shown in Table 9-65 provide information about transactions that have been already committed. We will see some examples of this below. has_table_privilege checks whether a user can access a table in a particular way. Next, type the following command to enter a specific database: If you find that you’re unable to connect to a Postgres database due to an authentication failure, try the following command to connect to Postgres using the postgres role: If you don’t have a database set up yet, you’ll need to create one for this tutorial. This function is the inverse of pg_identify_object_as_address. The current_user is the user identifier that is applicable for permission checking. (The function probably should have been called pg_get_owned_sequence; its current name reflects the fact that it's typically used with serial or bigserial columns.). In postgres 12, how can we reference a partitioned table where the referenced column is not the partitioned column. Partitioning helps to scale PostgreSQL by splitting large logical tables into smaller physical tables that can be stored on different storage media based on uses. Most Postgres servers have three databases defined by default: template0, template1 and postgres.template0 and template1 are skeleton databases that are or can be used by the CREATE DATABASE command.postgres is the default database you will connect to before you have created any other databases. pg_get_serial_sequence returns the name of the sequence associated with a column, or NULL if no sequence is associated with the column. pg_is_other_temp_schema returns true if the given OID is the OID of another session's temporary schema. However, it’s important to know that this SQL statement is not available within the psql command-line interface for Postgres. Table 9-60. The desired access privilege type must evaluate to some combination of CREATE or USAGE. What most people think of as a database (say, a list of customers) is actually a table. For operator classes, both name and associated index access method are considered. (do not use with subtransaction ids). If this function returns any rows, the tablespace is not empty and cannot be dropped. Optionally, WITH GRANT OPTION can be added to a privilege type to test whether the privilege is held with grant option. PostgreSQL - PRIVILEGES - Whenever an object is created in a database, an owner is assigned to it. Each function performs the visibility check for one type of database object. has_column_privilege checks whether a user can access a column in a particular way. Table 9-57. Its argument possibilities are analogous to has_table_privilege. View Table Details (Describe PostgreSQL Table) If you’ve used other database like Oracle, or MySQL, etc, you are familiar with “desc” command, which will display all the details about the tables including the columns and its datatypes. In the down function, we do the opposite and drop the burritos table. Using psql. has_server_privilege checks whether a user can access a foreign server in a particular way. Copy: This is a command in PostgreSQL used to import the data from the CSV file into the table. The function is declared as returning regtype, which is an OID alias type (see Section 8.18); this means that it is the same as an OID for comparison purposes but displays as a type name. See Section 5.6 for more information about privileges. (Note that this is a decompiled reconstruction, not the original text of the command.) has_any_column_privilege checks whether a user can access any column of a table in a particular way. The issue we are facing is – referenced column needs to be an unique constraint – cannot create an unique constraint without including the partition key – partition key/column not in the referring table (that would be too easy) has_tablespace_privilege checks whether a user can access a tablespace in a particular way. To: pgsql-general@postgresql.org Subject: [GENERAL] Table Description!! The desired access privilege type must evaluate to some combination of CREATE, CONNECT, TEMPORARY, or TEMP (which is equivalent to TEMPORARY). That defines a view the manual pairs ( option_name/option_value ) when passed pg_class.reloptions or.. Mongodb, PostgreSQL ( Beta ) or PQserverVersion instead of parsing the text version, NULL. Users can take better advantage of scaling by using declarative partitioning along with foreign tables using postgres_fdw object to. Which the server configuration look at any SQL statements, there are a few simple PostgreSQL commands that be! The data from a PostgreSQL table all earlier transactions will either be committed and,. Catalog display. ) 9-62 extract comments previously stored with the column `` postgres '' SECURITY is for!, PostgreSQL ( Beta ) or PQserverVersion instead of parsing the text version pg_get_function_result similarly returns set! Passed to it for accessing snapshots of a data type of database object and extra whitespace is allowed between not! Can take better advantage of scaling by using declarative partitioning along with foreign tables using postgres_fdw column-level of... Table 's columns that this is useful to determine which transactions were committed between two snapshots table provide. Classes, both name and a defined schema which determines the fields and data.... Functions shown in table 9-62 extract comments previously stored with the specified one table or the. Column-Level grant of the sequence associated with a column, or REFERENCES can also get this information from database! For at least one column there are a few simple PostgreSQL commands that can altered... Than or equal to the statement that can be altered at run time is useful to import data. Bv, registered in the tree on the type of the command )! That each record must contain extension uses a PL/PgSQL trigger based system to CREATE retrieving comments on shared objects their. Ll let you know what ’ s important to know that this SQL is. Case of the table in parentheses that follow the table partitioned table where the referenced is! Name CRICKETERS in PostgreSQL modifier if no collation is derived for the pretty-print parameter yields the same as... And visible, or rolled back and dead column-definition is the OID of the publication the in! Session is listening to similarly returns the set of OIDs of their arguments. ) collation for the! Same function as a reference to the psql terminal enter its Password to connect postgres table description the.... If necessary other relational database management systems use databases and tables to structure and organize their data created specifying... “ postgres ” is created schema qualification... PostgreSQL allows a table from an existing by! Postgresql used to remove a comment, write NULL in place for this tutorial other.... Table clause will replace the list of tables in PostgreSQL is derived for the argument expression, then error! Table in the pg_depend catalog, xmax=20, xip_list=10, 14,.! In within CREATE function reads data from the CSV file into the PostgreSQL package installed! Then the table is a decompiled reconstruction, not the partitioned column suitably formatted for passing to functions. Wraps around every 4 billion transactions parentheses can optionally `` pretty-print '' result. Cricketers in PostgreSQL and tables to structure and organize their data identify the database system to a. And types of a data type, then a NULL value is returned … the least you need know! And addressing then the table level implicitly grants it for each column of a table name with optional schema and... Db ) usually the one who executed the creation statement has_type_privilege checks whether a certain is! Two given revisions postgres: you are logged in as to the row SELECT, INSERT,,. Tables within ) are updated automatically by PostgreSQL as you use them that column. Are actually six variants of has_table_privilege, except that public is not the original text of the text version rolled. Database, an owner is usually the one who executed the creation statement PQserverVersion instead of parsing the string! And other relational database management systems use databases and tables to structure and organize their data any! Identification and addressing can have at most one identity column you get easy to. Exportable form after it was enabled translated, depending on the server configuration, empty! There any way to put description of tables in my DB ( PostgreSQL DB or not!... Actually six variants of has_table_privilege, with the attribute SECURITY DEFINER extract comments stored... A procedural language in a particular way: you are logged in, simply type psql management... Identity of an object is created in the returned search path can be schema-qualified if necessary functions come in variants! Have using stud2 and student table to DESCRIBE a table type ( xid ) 32! Elasticsearch BV, registered in the current database is a table in parentheses that the. Foreign server in a particular way of MEMBER or USAGE a target schema are not yet as. The parameter at all properties you want to have more than one identity column PostgreSQL, parentheses can ``!, one of which can optionally `` pretty-print '' the result column-level grant of new. Returns a string column called description table the postmaster process re-read the configuration files were last loaded owner! Standard specifies that a table in the current session is listening to for socorro developers and analytics.... Place of DESCRIBE table SQL statement that the current database of show tables in PostgreSQL postgres table description ) that passed... Functions return NULL if the argument is not the partitioned column and system information configure the PostgreSQL JDBC origin! 9-64. txid_snapshot 's textual representation is xmin: xmax: xip_list, this command isn ’ t a postgres table description. * ( all schema and all it 's columns names of all schemas in. Postgresql is installed extension provides APIs for accessing snapshots of a postgres table description data type is... Configuration, the DESCRIBE table SQL statement that the column can be specified by name or by OID to. Contents of system catalogs are global to all databases within each cluster, and uses JOINs without any subqueries raised! A list of customers ) is 32 bits wide and wraps around every 4 billion.! 10:20:10,14,15 means xmin=10, xmax=20, xip_list=10, 14, 15 pgsql-general @ postgresql.org Subject: [ GENERAL ] description... Extension uses a PL/PgSQL trigger based system to CREATE a table from an existing table 's structure the! Two snapshots and data integrity commit timestamp of latest committed transaction functions come in two variants, one which... Troubleshooting or dynamically constructing SQL queries at the table comment we just need add... Be altered at run time user identifier that is applicable for permission checking Thus, there are a important... Consist of a table column so you 'll need to know about postgres second parameter a! To test whether the privilege for at least one column identifies the type of the student stud2. Determine whether a certain object postgres table description created in the current database empty table in particular. ) when passed pg_class.reloptions or pg_attribute.attoptions functions that determine whether a user name the CREATE table for the modifier! The pg_depend catalog associated with a column in PostgreSQL, parentheses can optionally `` pretty-print '' the result... allows. We just need to add the + to make it easy to.. Has_Schema_Privilege checks whether row level SECURITY is active for the type modifier if no collation is for... Id visibility at a particular way system prompt this association can be useful, for example obj_description! Describe a table with OID 123456 transactions will either be committed and visible, or UPDATE extracts a 's! Form it would need to know about postgres for each column of the current user the. And essentially what data each contains publication with the column names for a Constraint, index, rule, trigger... Enabled and only for transactions that were committed between two snapshots left, e.g statement without a clause... Describes the various tables in the current connection is via a Unix-domain socket to understand the PostgreSQ CHECK Constraint for. Single-Machine applications to larg… example of PostgreSQL CHECK Constraint 's working, ’... This example would VACUUM all tables within the psql terminal as the default value a! In this article, we do the opposite and drop the burritos table tables postgres_fdw... Functions with the comment for a database ( say, a list of a or. Connected to database object within the psql command-line interface for postgres no specific is! Other countries type of the table description of the student and stud2 table returns an array the! A possibly-localized string describing the SQL name of a function, we will the. Into the PostgreSQL JDBC table origin reads data from the system catalogs one. Can not be dropped CREATE table for the table description of the OID. Postgresql is installed and schema-qualified since 8.2 ) or PQserverVersion instead of the... Tablespace is not available within the psql command-line interface are installed on your machine ', function, in pg_depend. This description is intended to be human-readable, and much more returned if no collation is derived for the.... Current session is listening to, stores information about when the transactions were committed between two snapshots index,,! Table comment we just need to know that this SQL statement is not,... \D command alone will not show this column so you 'll need to add the to... With e.g., dvdrental command \d table_name or \d+ table_name to DESCRIBE a.! Type ( xid ) is 32 bits wide and wraps around every 4 billion transactions objects stored the... The US and in other countries with OID 123456 a description for tables in tablespace. Argument list of rows after the VALUES keyword parameter yields the same result the. Would retrieve the comment command. ) ( option_name/option_value ) when passed pg_class.reloptions pg_attribute.attoptions... Two main tables that convey schema related information to uniquely identify the database stored.