From 19d0825303bf1ef3e357ff27e8f0a629c49e5c16 Mon Sep 17 00:00:00 2001
From: Pranav C <61551451+pranavxc@users.noreply.github.com>
Date: Wed, 5 Oct 2022 11:40:00 +0530
Subject: [PATCH] feat(api): oracledb - add basic formula support

---
 .../lib/sql/functionMappings/oracle.ts        | 61 +++++++++++++++++++
 .../lib/sql/mapFunctionName.ts                |  4 ++
 2 files changed, 65 insertions(+)
 create mode 100644 packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/functionMappings/oracle.ts

diff --git a/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/functionMappings/oracle.ts b/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/functionMappings/oracle.ts
new file mode 100644
index 0000000000..31c3bd0ae7
--- /dev/null
+++ b/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/functionMappings/oracle.ts
@@ -0,0 +1,61 @@
+import commonFns from './commonFns';
+import { MapFnArgs } from '../mapFunctionName';
+
+const pg = {
+  ...commonFns,
+  LEN: 'LENGTH',
+  MIN: 'LEAST',
+  MAX: 'GREATEST',
+  CEILING: 'CEIL',
+  POWER: 'POWER',
+  SQRT: 'SQRT',
+  SEARCH: 'INSTR',
+  NOW: (args: MapFnArgs) => {
+    return args.knex.raw(`CURRENT_DATE${args.colAlias}`);
+  },
+  REPEAT: (args: MapFnArgs) => {
+    const arg1 = args.fn(args.pt.arguments[0]);
+    const arg2 = args.fn(args.pt.arguments[1]);
+    return args.knex.raw(
+      `RPAD(${arg1}, ${arg2}*LENGTH(${arg1}), ${arg1})${args.colAlias}`
+    );
+  },
+  // INT(args: MapFnArgs) {
+  //   // todo: correction
+  //   return args.knex.raw(
+  //     `REGEXP_REPLACE(COALESCE(${args.fn(
+  //       args.pt.arguments[0]
+  //     )}::character varying, '0'), '[^0-9]+|\\.[0-9]+' ,'')${args.colAlias}`
+  //   );
+  // },
+  // MID: 'SUBSTR',
+  // FLOAT: ({ fn, knex, pt, colAlias }: MapFnArgs) => {
+  //   return knex
+  //     .raw(`CAST(${fn(pt.arguments[0])} as DOUBLE PRECISION)${colAlias}`)
+  //     .wrap('(', ')');
+  // },
+  // DATEADD: ({ fn, knex, pt, colAlias }: MapFnArgs) => {
+  //   return knex.raw(
+  //     `${fn(pt.arguments[0])} + (${fn(pt.arguments[1])} ||
+  //     '${String(fn(pt.arguments[2])).replace(
+  //       /["']/g,
+  //       ''
+  //     )}')::interval${colAlias}`
+  //   );
+  // },
+  // WEEKDAY: ({ fn, knex, pt, colAlias }: MapFnArgs) => {
+  //   // isodow: the day of the week as Monday (1) to Sunday (7)
+  //   // WEEKDAY() returns an index from 0 to 6 for Monday to Sunday
+  //   return knex.raw(
+  //     `(EXTRACT(ISODOW FROM ${
+  //       pt.arguments[0].type === 'Literal'
+  //         ? `date '${dayjs(fn(pt.arguments[0])).format('YYYY-MM-DD')}'`
+  //         : fn(pt.arguments[0])
+  //     }) - 1 - ${getWeekdayByText(
+  //       pt?.arguments[1]?.value
+  //     )} % 7 + 7) ::INTEGER % 7 ${colAlias}`
+  //   );
+  // },
+};
+
+export default pg;
diff --git a/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/mapFunctionName.ts b/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/mapFunctionName.ts
index 8227e273ec..4989cd5352 100644
--- a/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/mapFunctionName.ts
+++ b/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/mapFunctionName.ts
@@ -3,6 +3,7 @@ import mssql from './functionMappings/mssql';
 import mysql from './functionMappings/mysql';
 import pg from './functionMappings/pg';
 import sqlite from './functionMappings/sqlite';
+import oracle from './functionMappings/oracle';
 import { Knex } from 'knex';
 
 export interface MapFnArgs {
@@ -37,6 +38,9 @@ const mapFunctionName = (args: MapFnArgs): any => {
     case 'sqlite3':
       val = sqlite[name] || name;
       break;
+    case 'oracledb':
+      val = oracle[name] || name;
+      break;
   }
 
   if (typeof val === 'function') {