modified

node_modules/knex/lib/query/analytic.js

@@ -0,0 +1,52 @@
+const assert = require('assert');
+
+// Analytic
+// -------
+
+// The "Analytic" is an object holding any necessary info about a analytic function
+// e.g row_number, rank, dense_rank,
+class Analytic {
+  constructor(method, schema, alias, orderBy, partitions) {
+    this.schema = schema;
+    this.type = 'analytic';
+    this.method = method;
+    this.order = orderBy || [];
+    this.partitions = partitions || [];
+    this.alias = alias;
+    this.and = this;
+
+    this.grouping = 'columns';
+  }
+
+  partitionBy(column, direction) {
+    assert(
+      Array.isArray(column) || typeof column === 'string',
+      `The argument to an analytic partitionBy function must be either a string
+            or an array of string.`
+    );
+
+    if (Array.isArray(column)) {
+      this.partitions = this.partitions.concat(column);
+    } else {
+      this.partitions.push({ column: column, order: direction });
+    }
+    return this;
+  }
+
+  orderBy(column, direction) {
+    assert(
+      Array.isArray(column) || typeof column === 'string',
+      `The argument to an analytic orderBy function must be either a string
+            or an array of string.`
+    );
+
+    if (Array.isArray(column)) {
+      this.order = this.order.concat(column);
+    } else {
+      this.order.push({ column: column, order: direction });
+    }
+    return this;
+  }
+}
+
+module.exports = Analytic;