-

idea-sandbox/config/extensions/com.intellij.database/data/aggregators/AVG.groovy

@@ -0,0 +1,38 @@
+/*
+ * Available context bindings:
+ *   COLUMNS     List<DataColumn>
+ *   ROWS        Iterable<DataRow>
+ *   OUT         { append() }
+ *   FORMATTER   { format(row, col); formatValue(Object, col); getTypeName(Object, col); isStringLiteral(Object, col); }
+ *   TRANSPOSED  Boolean
+ * plus ALL_COLUMNS, TABLE, DIALECT
+ *
+ * where:
+ *   DataRow     { rowNumber(); first(); last(); data(): List<Object>; value(column): Object }
+ *   DataColumn  { columnNumber(), name() }
+ */
+
+import static java.math.MathContext.DECIMAL128
+
+BigDecimal RES = 0
+int i = 0
+ROWS.each { row ->
+  COLUMNS.each { column ->
+    def value = row.value(column)
+    if (value instanceof Number) {
+      RES = RES.add(value, DECIMAL128)
+      i++
+    }
+    else if (value.toString().isBigDecimal()) {
+      RES = RES.add(value.toString().toBigDecimal(), DECIMAL128)
+      i++
+    }
+  }
+}
+if (i > 0) {
+  RES = RES.divide(i, DECIMAL128)
+  OUT.append(RES.toString())
+}
+else {
+  OUT.append("Not enough values")
+}