feat: Add MID/SUBSTR function support

Signed-off-by: Pranav C <pranavxc@gmail.com>

packages/nc-gui/components/project/spreadsheet/components/editColumn/formulaOptions.vue

@@ -87,7 +87,9 @@ export default {
       'SEARCH',
       'INT',
       'RIGHT',
-      'LEFT'
+      'LEFT',
+      'SUBSTR',
+      'MID'
     ],
     availableBinOps: ['+', '-', '*', '/'],
     autocomplete: false,

packages/nocodb/src/lib/dataMapper/lib/sql/functionMappings/mssql.ts

@@ -49,6 +49,7 @@ const mssql = {
   INT: (args: MapFnArgs) => {
     return args.knex.raw(`CASE WHEN ISNUMERIC(${args.fn(args.pt.arguments[0]).toQuery()}) = 1 THEN FLOOR(${args.fn(args.pt.arguments[0]).toQuery()}) ELSE 0 END${args.colAlias}`)
   },
+  MID:'SUBSTR'
 }
 
 export default mssql;

packages/nocodb/src/lib/dataMapper/lib/sql/functionMappings/mysql.ts

@@ -19,7 +19,8 @@ const mysql2 = {
   },
   RIGHT:(args: MapFnArgs)=> {
     return args.knex.raw(`SUBSTR(${args.fn(args.pt.arguments[0])},-${args.fn(args.pt.arguments[1])})${args.colAlias}`)
-  }
+  },
+  MID:'SUBSTR'
 }
 
 

packages/nocodb/src/lib/dataMapper/lib/sql/functionMappings/pg.ts

@@ -15,6 +15,7 @@ const pg = {
     // 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'
 }
 
 

packages/nocodb/src/lib/dataMapper/lib/sql/functionMappings/sqlite.ts

@@ -31,7 +31,8 @@ const sqlite3 = {
   },
   RIGHT:(args: MapFnArgs)=> {
     return args.knex.raw(`SUBSTR(${args.fn(args.pt.arguments[0])},-${args.fn(args.pt.arguments[1])})${args.colAlias}`)
-  }
+  },
+  MID:'SUBSTR'
 }