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Merge pull request #35277 from den-crane/Docs/named-collections
Doc. named connections. Сontinuation.
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Kseniia Sumarokova
GitHub
commit
8c3caf3805
@ -41,7 +41,7 @@ Example of configuration:
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</clickhouse>
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```
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### An example of using named connections with the s3 function
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### Example of using named connections with the s3 function
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```sql
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INSERT INTO FUNCTION s3(s3_mydata, url = 'https://s3.us-east-1.amazonaws.com/yourbucket/mydata/test_file.tsv.gz',
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@ -57,7 +57,7 @@ FROM s3(s3_mydata, url = 'https://s3.us-east-1.amazonaws.com/yourbucket/mydata/t
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1 rows in set. Elapsed: 0.279 sec. Processed 10.00 thousand rows, 90.00 KB (35.78 thousand rows/s., 322.02 KB/s.)
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```
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### An example of using named connections with an S3 table
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### Example of using named connections with an S3 table
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```sql
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CREATE TABLE s3_engine_table (number Int64)
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@ -72,7 +72,7 @@ SELECT * FROM s3_engine_table LIMIT 3;
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└────────┘
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```
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## Named connections for accessing MySQL database.
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## Named connections for accessing MySQL database
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The description of parameters see [mysql](../sql-reference/table-functions/mysql.md).
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@ -94,7 +94,7 @@ Example of configuration:
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</clickhouse>
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```
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### An example of using named connections with the mysql function
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### Example of using named connections with the mysql function
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```sql
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SELECT count() FROM mysql(mymysql, table = 'test');
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@ -104,7 +104,7 @@ SELECT count() FROM mysql(mymysql, table = 'test');
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└─────────┘
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```
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### An example of using named connections with an MySQL table
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### Example of using named connections with an MySQL table
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```sql
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CREATE TABLE mytable(A Int64) ENGINE = MySQL(mymysql, table = 'test', connection_pool_size=3, replace_query=0);
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@ -115,7 +115,20 @@ SELECT count() FROM mytable;
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└─────────┘
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```
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### An example of using named with an external dictionary with source MySQL
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### Example of using named connections with database with engine MySQL
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```sql
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CREATE DATABASE mydatabase ENGINE = MySQL(mymysql);
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SHOW TABLES FROM mydatabase;
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┌─name───┐
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│ source │
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│ test │
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└────────┘
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```
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### Example of using named connections with an external dictionary with source MySQL
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```sql
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CREATE DICTIONARY dict (A Int64, B String)
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@ -130,3 +143,87 @@ SELECT dictGet('dict', 'B', 2);
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│ two │
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└─────────────────────────┘
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```
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## Named connections for accessing PostgreSQL database
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The description of parameters see [postgresql](../sql-reference/table-functions/postgresql.md).
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Example of configuration:
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```xml
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<clickhouse>
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<named_collections>
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<mypg>
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<user>pguser</user>
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<password>jw8s0F4</password>
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<host>127.0.0.1</host>
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<port>5432</port>
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<database>test</database>
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<schema>test_schema</schema>
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<connection_pool_size>8</connection_pool_size>
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</mypg>
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</named_collections>
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</clickhouse>
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```
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### Example of using named connections with the postgresql function
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```sql
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SELECT * FROM postgresql(mypg, table = 'test');
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┌─a─┬─b───┐
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│ 2 │ two │
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│ 1 │ one │
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└───┴─────┘
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SELECT * FROM postgresql(mypg, table = 'test', schema = 'public');
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┌─a─┐
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│ 1 │
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│ 2 │
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│ 3 │
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└───┘
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```
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### Example of using named connections with database with engine PostgreSQL
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```sql
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CREATE TABLE mypgtable (a Int64) ENGINE = PostgreSQL(mypg, table = 'test', schema = 'public');
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SELECT * FROM mypgtable;
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┌─a─┐
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│ 1 │
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│ 2 │
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│ 3 │
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└───┘
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```
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### Example of using named connections with database with engine PostgreSQL
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```sql
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CREATE DATABASE mydatabase ENGINE = PostgreSQL(mypg);
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SHOW TABLES FROM mydatabase
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┌─name─┐
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│ test │
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└──────┘
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```
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### Example of using named connections with an external dictionary with source POSTGRESQL
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```sql
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CREATE DICTIONARY dict (a Int64, b String)
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PRIMARY KEY a
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SOURCE(POSTGRESQL(NAME mypg TABLE test))
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LIFETIME(MIN 1 MAX 2)
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LAYOUT(HASHED());
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SELECT dictGet('dict', 'b', 2);
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┌─dictGet('dict', 'b', 2)─┐
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│ two │
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└─────────────────────────┘
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```
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@ -24,7 +24,7 @@ $ cat /etc/clickhouse-server/config.d/named_collections.xml
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</clickhouse>
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```
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## Именованные соединения для доступа к S3.
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## Именованные соединения для доступа к S3
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Описание параметров смотри [Табличная Функция S3](../sql-reference/table-functions/s3.md).
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@ -72,7 +72,7 @@ SELECT * FROM s3_engine_table LIMIT 3;
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└────────┘
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```
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## Пример использования именованных соединений с базой данных MySQL.
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## Пример использования именованных соединений с базой данных MySQL
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Описание параметров смотри [mysql](../sql-reference/table-functions/mysql.md).
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@ -104,7 +104,7 @@ SELECT count() FROM mysql(mymysql, table = 'test');
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└─────────┘
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```
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### Пример использования именованных таблицей с движком mysql
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### Пример использования именованных соединений таблицей с движком mysql
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```sql
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CREATE TABLE mytable(A Int64) ENGINE = MySQL(mymysql, table = 'test', connection_pool_size=3, replace_query=0);
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@ -115,7 +115,20 @@ SELECT count() FROM mytable;
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└─────────┘
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```
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### Пример использования именованных с внешним словарем с источником mysql
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### Пример использования именованных соединений базой данных с движком MySQL
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```sql
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CREATE DATABASE mydatabase ENGINE = MySQL(mymysql);
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SHOW TABLES FROM mydatabase;
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┌─name───┐
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│ source │
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│ test │
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└────────┘
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```
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### Пример использования именованных соединений с внешним словарем с источником mysql
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```sql
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CREATE DICTIONARY dict (A Int64, B String)
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@ -130,3 +143,86 @@ SELECT dictGet('dict', 'B', 2);
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│ two │
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└─────────────────────────┘
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```
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## Пример использования именованных соединений с базой данных PostgreSQL
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Описание параметров смотри [postgresql](../sql-reference/table-functions/postgresql.md).
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Пример конфигурации:
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```xml
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<clickhouse>
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<named_collections>
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<mypg>
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<user>pguser</user>
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<password>jw8s0F4</password>
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<host>127.0.0.1</host>
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<port>5432</port>
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<database>test</database>
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<schema>test_schema</schema>
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<connection_pool_size>8</connection_pool_size>
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</mypg>
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</named_collections>
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</clickhouse>
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```
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### Пример использования именованных соединений с табличной функцией postgresql
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```sql
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SELECT * FROM postgresql(mypg, table = 'test');
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┌─a─┬─b───┐
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│ 2 │ two │
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│ 1 │ one │
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└───┴─────┘
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SELECT * FROM postgresql(mypg, table = 'test', schema = 'public');
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┌─a─┐
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│ 1 │
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│ 2 │
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│ 3 │
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└───┘
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```
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### Пример использования именованных соединений таблицей с движком PostgreSQL
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```sql
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CREATE TABLE mypgtable (a Int64) ENGINE = PostgreSQL(mypg, table = 'test', schema = 'public');
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SELECT * FROM mypgtable;
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┌─a─┐
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│ 1 │
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│ 2 │
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│ 3 │
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└───┘
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```
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### Пример использования именованных соединений базой данных с движком PostgreSQL
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```sql
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CREATE DATABASE mydatabase ENGINE = PostgreSQL(mypg);
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SHOW TABLES FROM mydatabase
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┌─name─┐
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│ test │
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└──────┘
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```
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### Пример использования именованных соединений с внешним словарем с источником POSTGRESQL
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```sql
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CREATE DICTIONARY dict (a Int64, b String)
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PRIMARY KEY a
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SOURCE(POSTGRESQL(NAME mypg TABLE test))
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LIFETIME(MIN 1 MAX 2)
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LAYOUT(HASHED());
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SELECT dictGet('dict', 'b', 2);
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┌─dictGet('dict', 'b', 2)─┐
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│ two │
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└─────────────────────────┘
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```
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