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fix typos
This commit is contained in:
Felix Cheung
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1 changed files with 20 additions and 22 deletions
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@ -19,7 +19,7 @@ group: manual
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<tr>
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<td>%psql.sql</td>
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<td>PostgreSqlInterpreter</td>
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<td>Provides SQL environment for Postgresql, HAWQ and Greenplum</td>
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<td>Provides SQL environment for PostgreSQL, HAWQ and Greenplum</td>
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</tr>
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</table>
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@ -28,22 +28,22 @@ group: manual
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This interpreter seamlessly supports the following SQL data processing engines:
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* [PostgreSQL](http://www.postgresql.org/) - OSS, Object-relational database management system (ORDBMS)
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* [Apache HAWQ](http://pivotal.io/big-data/pivotal-hawq) - Powerful [Open Source](https://wiki.apache.org/incubator/HAWQProposal) SQL-On-Hadoop engine.
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* [PostgreSQL](http://www.postgresql.org/) - OSS, Object-relational database management system (ORDBMS)
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* [Apache HAWQ](http://pivotal.io/big-data/pivotal-hawq) - Powerful [Open Source](https://wiki.apache.org/incubator/HAWQProposal) SQL-On-Hadoop engine.
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* [Greenplum](http://pivotal.io/big-data/pivotal-greenplum-database) - MPP database built on open source PostgreSQL.
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This [Video Tutorial](https://www.youtube.com/watch?v=wqXXQhJ5Uk8) illustrates some of the features provided by the `Postgresql Interpreter`.
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### Create Interpreter
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### Create Interpreter
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By default Zeppelin creates one `PSQL` instance. You can remove it or create new instances.
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By default Zeppelin creates one `PSQL` instance. You can remove it or create new instances.
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Multiple PSQL instances can be created, each configured to the same or different backend databases. But over time a `Notebook` can have only one PSQL interpreter instance `bound`. That means you _can not_ connect to different databases in the same `Notebook`. This is a known Zeppelin limitation.
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Multiple PSQL instances can be created, each configured to the same or different backend databases. But over time a `Notebook` can have only one PSQL interpreter instance `bound`. That means you _cannot_ connect to different databases in the same `Notebook`. This is a known Zeppelin limitation.
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To create new PSQL instance open the `Interprter` section and click the `+Create` button. Pick a `Name` of your choice and from the `Interpreter` drop-down select `psql`. Then follow the configuration instructions and `Save` the new instance.
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To create new PSQL instance open the `Interpreter` section and click the `+Create` button. Pick a `Name` of your choice and from the `Interpreter` drop-down select `psql`. Then follow the configuration instructions and `Save` the new instance.
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> Note: The `Name` of the instance is used only to distinct the instances while binding them to the `Notebook`. The `Name` is irrelevant inside the `Notebook`. In the `Notebook` you must use `%psql.sql` tag.
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> Note: The `Name` of the instance is used only to distinct the instances while binding them to the `Notebook`. The `Name` is irrelevant inside the `Notebook`. In the `Notebook` you must use `%psql.sql` tag.
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### Bind to Notebook
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In the `Notebook` click on the `settings` icon in the top right corner. The select/deselect the interpreters to be bound with the `Notebook`.
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@ -51,7 +51,7 @@ In the `Notebook` click on the `settings` icon in the top right corner. The sele
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### Configuration
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You can modify the configuration of the PSQL from the `Interpreter` section. The PSQL interpreter expenses the following properties:
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<table class="table-configuration">
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<tr>
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<th>Property Name</th>
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@ -84,15 +84,15 @@ You can modify the configuration of the PSQL from the `Interpreter` section. Th
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<td>1000</td>
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</tr>
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</table>
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### How to use
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```
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Tip: Use (CTRL + .) for SQL auto-completion.
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```
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#### DDL and SQL commands
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Start the paragraphs with the full `%psql.sql` prefix tag! The short notation: `%psql` would still be able run the queries but the syntax highlighting and the auto-completions will be disabled.
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Start the paragraphs with the full `%psql.sql` prefix tag! The short notation: `%psql` would still be able run the queries but the syntax highlighting and the auto-completions will be disabled.
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You can use the standard CREATE / DROP / INSERT commands to create or modify the data model:
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@ -147,14 +147,14 @@ This will produce output like this:
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#### Apply Zeppelin Dynamic Forms
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You can leverage [Zepplein Dynamic Form](https://zeppelin.incubator.apache.org/docs/manual/dynamicform.html) inside your queries. You can use both the `text input` and `select form` parametrization features
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You can leverage [Zeppelin Dynamic Form](https://zeppelin.incubator.apache.org/docs/manual/dynamicform.html) inside your queries. You can use both the `text input` and `select form` parametrization features
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```sql
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%psql.sql
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SELECT ${group_by}, count(*) as count
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FROM retail_demo.order_lineitems_pxf
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GROUP BY ${group_by=product_id,product_id|product_name|customer_id|store_id}
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ORDER BY count ${order=DESC,DESC|ASC}
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SELECT ${group_by}, count(*) as count
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FROM retail_demo.order_lineitems_pxf
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GROUP BY ${group_by=product_id,product_id|product_name|customer_id|store_id}
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ORDER BY count ${order=DESC,DESC|ASC}
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LIMIT ${limit=10};
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```
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#### Example HAWQ PXF/HDFS Tables
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@ -172,9 +172,7 @@ And retrieve content
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```sql
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%psql.sql
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seelect * from retail_demo.payment_methods_pxf
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select * from retail_demo.payment_methods_pxf
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```
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### Auto-completion
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The PSQL Interpreter provides a basic auto-completion functionality. On `(Ctrl+.)` it list the most relevant suggesntions in a pop-up window. In addition to the SQL keyword the interpter provides suggestions for the Schema, Table, Column names as well.
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### Auto-completion
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The PSQL Interpreter provides a basic auto-completion functionality. On `(Ctrl+.)` it list the most relevant suggestions in a pop-up window. In addition to the SQL keyword the interpreter provides suggestions for the Schema, Table, Column names as well.
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