MarkLogic 12 EA 1 Product Documentationop.fromSQL
op.fromSQL( select as String, [qualifier as String] ) as ModifyPlan
Summary
This function dynamically constructs a row set based on a SQL SELECT query from views.
| Parameters | |
|---|---|
| select | A SQL SELECT query expressed as a string. |
| qualifier | Specifies a name for qualifying the column names. Placeholder parameters in the SQL string may be bound in the result() call. |
Usage Notes
The fromSQL function is one of the
Data Access Functions.
Example
// List all of the employees in the 'employees' view.
const op = require('/MarkLogic/optic');
op.fromSQL('SELECT employees.FirstName, employees.LastName FROM employees')
.result();
Example
// Joins the row set produced by a SQL SELECT with the row set produced by a
// SPARQL SELECT and then groups, orders, and limits the result:
const op = require('/MarkLogic/optic');
const topTweeters =
op.fromSQL('SELECT customerId, customerName FROM customers WHERE ...', 'customers')
.joinInner(
op.fromSPARQL('SELECT ?customerId ?tweetId WHERE { ... }', 'tweets'),
op.on(
op.viewCol('customers', 'customerId'),
op.viewCol('tweets', 'customerId')
))
.groupBy('customerName', op.count('tweetCount', 'tweetId'))
.orderBy('tweetCount')
.limit(1000)
.map(row => {...})
.result();