postgresql encryption

PostgreSQL tutorial (8): Index details, postgresql Index I. Index type: PostgreSQL provides multiple index types: B-Tree, Hash, GiST, and GIN. Because they use different algorithms, each index type has a suitable Query type, the create index Command creates a B-Tree INDEX.1. B-Tree:Copy codeThe Code is as follows:Create table test1 (Id integer,Content varchar);Cr

PostgreSQL introduction, postgresqlPostgreSQL Introduction: PostgreSQL is a relational database management system in the industry. It is applicable to various Linux operating systems, Windows, Solaris, BSD, and Mac OS X. PostgreSQL follows the BSD license and is an open-source software. As the fourth largest relational database service in the world,

directory is not specified, the Pgdata in the environment variable will be used by default, since we have just set up the PGDATA environment variable, so here we do not need to specify the additional, the final execution of the initialization command:initdbThe following information indicates that the initialization was successful:At the same time, in the PostgreSQL directory, you can see the data directory and the data and configuration files for tha

Describes the range type features and PostgreSQL features in postgresql. A new feature of PostgreSQL 9.2 is the range type range types. With this name, you can easily guess the purpose of this type. It allows you to define a value range for a column of data. This simple feature eliminates the need to define two fields to describe the start value and end value of

Detailed explanation of adding keywords in PostgreSQL syntax, detailed explanation of postgresql Add keywords in PostgreSQL syntax When PostgreSQL's background process Postgres receives the query statement, it first passes it to the query analysis module for lexical, syntax, and semantic analysis. Add keywords in the parser Syntax Parsing module. Introduction

PostgreSQL code analysis, query optimization, process_duplicate_ors, postgresql PostgreSQL code analysis and query optimization. /** Process_duplicate_ors * Given a list of exprs which are ORed together, try to apply * the inverse OR distributive law. ** Returns the resulting expression (cocould be an AND clause, an OR * clause, or maybe even a single subexpr

PostgreSQL registration Start and Stop unmount batch processing script, postgresql Batch Processing Register to start pg_install.bat: echo offset PGSQL_DIR=%~dp0if not "%PGSQL_HOME%"=="" ( if not "%PGSQL_HOME%"=="%PGSQL_DIR%" ( echo PGSQL_HOME=%PGSQL_HOME% != PGSQL_DIR=%PGSQL_DIR% goto pg_ends )) else ( set PGSQL_HOME=%PGSQL_DIR% echo PGSQL_HOME must be set as PGSQL_DIR=%PGSQL_DIR%

PostgreSQL code analysis, query optimization, canonicalize_qual, postgresql Here, we have finished sorting out the part of the regular expression. The reading order is as follows: I. PostgreSQL code analysis, query optimization, canonicalize_qual Ii. PostgreSQL code analysis, query optimization, pull_ands () and pull

For security reasons, we typically choose an encryption method to encrypt text that requires security, while BASE64 encryption and DES64 encryption are common cryptographic algorithms. I remember what I used in the previous project was the combination of these two cryptographic algorithms: Base64 + des encryption. Of c

visiting postgresql serverHost all 0.0.0.0 0.0.0.0 md5 Explain the last line:Host indicates that the allowed type is host;The first all is the allowed database name;The second all is the permitted user;The first 0.0.0.0 is the ip address that can be accessed;The second 0.0.0.0 is the subnet mask that can be accessed;The final md5 indicates the encryption method of the password. If you change md5 to trust,

Symmetric encryption and asymmetric encryption, asymmetric encryptionSafe communication methods must meet the following three conditions:1. Integrity, that is, the message has not been tampered with midway through.2. Confidentiality, which cannot be decrypted by a third party.3. verifiable. The message receiver can determine who sent the message. Symmetric encryption