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PREPARE TRANSACTION
databases or other transactional resources. Unless you're writing a transaction manager, you probably shouldn't be using PREPARE TRANSACTION . This command must be used inside a transaction block. Use BEGIN to start
Documentation >> PostgreSQL 16
F.19. intagg — integer aggregator and enumerator
database systems have the notion of a one to many table. Such a table usually sits between two indexed tables, for example: CREATE
Documentation >> PostgreSQL 16
Chapter 28. Monitoring Database Activity
CREATE INDEX Progress Reporting 28.4.5. VACUUM Progress Reporting 28.4.6. Base Backup Progress Reporting 28.5. Dynamic Tracing 28.5.1. Compiling for Dynamic Tracing 28.5.2. Built-in Probes 28.5.3. Using Probes 28.5.4. Defining New Probes A database
Documentation >> PostgreSQL 16
reindexdb
database name is read from the environment variable PGDATABASE . If that is not set, the user name specified for the connection is used. The dbname can be a connection string . If so, connection string parameters
Documentation >> PostgreSQL 16
59.2. Foreign Data Wrapper Callback Routines
database object options. The FDW may ignore the local_schema field of the ImportForeignSchemaStmt , because the core server will automatically insert that name into the parsed CREATE
Documentation >> PostgreSQL 16
12.7. Configuration Example
database management system, is now undergoing beta testing of the next version of our software. '); The next step is to set the session to use the new configuration, which was created
Documentation >> PostgreSQL 16
5.6. Modifying Tables
create it again. But this is not a convenient option if the table is already filled with data, or if the table is referenced by other database
Documentation >> PostgreSQL 16
11.5. Combining Multiple Indexes
database developer must make trade-offs to decide which indexes to provide. Sometimes multicolumn indexes are best, but sometimes it's better to create
Documentation >> PostgreSQL 16
Chapter 7. Queries
create tables, how to fill them with data, and how to manipulate that data. Now we finally discuss how to retrieve the data from the database
Documentation >> PostgreSQL 16
20.17. Developer Options
databases. As such, they have been excluded from the sample postgresql.conf file. Note that many of these parameters require special source compilation flags to work at all. allow_in_place_tablespaces ( boolean ) # Allows tablespaces
Documentation >> PostgreSQL 16
15.4. Parallel Safety
CREATE AGGREGATE , the PARALLEL option can be specified with SAFE , RESTRICTED , or UNSAFE as the corresponding value. Functions and aggregates must be marked PARALLEL UNSAFE if they write to the database
Documentation >> PostgreSQL 16
36.4. Using Host Variables
database back to the program, the C variables that are intended to contain this data need to be declared in specially marked sections, so the embedded SQL preprocessor is made aware of them. This section
Documentation >> PostgreSQL 16
CREATE RULE
create a new rule, or replace an existing rule of the same name for the same table. The PostgreSQL rule system allows one to define an alternative action to be performed on insertions, updates
Documentation >> PostgreSQL 16
32.1. What Is JIT compilation?
creating a function specific to the table layout and the number of columns to be extracted. 32.1.2. Inlining # PostgreSQL is very extensible and allows new data types, functions, operators and other database
Documentation >> PostgreSQL 16
Chapter 2. The SQL Language
Creating a New Table 2.4. Populating a Table With Rows 2.5. Querying a Table 2.6. Joins Between Tables 2.7. Aggregate Functions 2.8. Updates 2.9. Deletions Prev Up Next 1.4. Accessing a Database