Amazon Aurora Spatial Reader Parameters
Database Connections |
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Connections store authentication information. For general information about sharing database connections, please seeUsing Database Connections. Note that different subsets of Database Connection parameters are made available in different contexts. ![]() Select an existing connection, orAdd Database Connectionto define a new connection. The new connection can be made visible only to the current user, or can be shared among multiple users. |
Connection Parameters
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This specifies the machine running the Amazon Aurora database as either an IP address or host name.
The database must have proper permissions and be set up to accept TCP/IP connections if connecting from a remote machine.
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远程连接时,这会指定连接到DBMS服务的TCP / IP端口。默认端口为3306。
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This field is automatically populated with the information specified in the Input Dataset field, which specifies the name of the database. The database must exist in the DBMS.
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Enter the username and password to access the database, user account, or wherever authentication is required.
Constraints
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After you have specified the database connection, click the Browse button to select tables for import. A connection window appears while the system compiles a table from the database.
Once the table list appears, you can select one or more tables, and then click OK to dismiss the window. The table name(s) will appear in the Table List field in the parameter box.
架构属性
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Use this parameter to exposeFormat Attributesin Workbench when you create a workspace:
- In adynamic scenario, it means these attributes can be passed to the output dataset at runtime.
- In a non-dynamic scenario, you can use this parameter to expose additional attributes on multiple feature types.
Use Search Envelope
Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that intersect with the bounding box are returned.
If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.
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When selected, this parameter removes any portions of imported features being read that are outside the Search Envelope.
The example below illustrates the results of the Search Envelope whenClip to Search Envelopeis not selected (set to No) and when it is selected (set to Yes).
- No: Any features that cross the search envelope boundary will be read, including the portion that lies outside of the boundary.
- Yes: Any features that cross the search envelope boundary will be clipped at the boundary, and only the portion that lies inside the boundary will be read. The underlying function for theClip to Search Envelopefunction is an intersection; however, whenClip to Search Envelopeis selected, a clipping operation is also performed in addition to the intersection.
Advanced
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IfYes, the entire result set of the main feature query is retrieved into a large buffer in client memory. IfNo, the reader retrieves one row at a time from the server, caching them in a smaller buffer and consuming less memory. A value ofNoallows for large datasets to be processed without the possibility of running out of client memory. A value ofYesmay improve the performance of smaller queries.