fix(gui): cast division output to float in formula

re #530

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

packages/nocodb/src/lib/dataMapper/lib/sql/formulaQueryBuilderFromString.ts

@@ -27,18 +27,18 @@ export default function formulaQueryBuilder(tree, alias, knex, aliasToColumn = {
             return fn(pt.arguments[0], a, prevBinaryOp)
           }
           break;
-        case 'AVG':
-          if (pt.arguments.length > 1) {
-            return fn({
-              type: 'BinaryExpression',
-              operator: '/',
-              left: {...pt, callee: {name: 'SUM'}},
-              right: {type: 'Literal', value: pt.arguments.length}
-            }, a, prevBinaryOp)
-          } else {
-            return fn(pt.arguments[0], a, prevBinaryOp)
-          }
-          break;
+        // case 'AVG':
+        //   if (pt.arguments.length > 1) {
+        //     return fn({
+        //       type: 'BinaryExpression',
+        //       operator: '/',
+        //       left: {...pt, callee: {name: 'SUM'}},
+        //       right: {type: 'Literal', value: pt.arguments.length}
+        //     }, a, prevBinaryOp)
+        //   } else {
+        //     return fn(pt.arguments[0], a, prevBinaryOp)
+        //   }
+        //   break;
         case 'CONCAT':
           if (knex.clientType() === 'sqlite3') {
             if (pt.arguments.length > 1) {
@@ -54,7 +54,7 @@ export default function formulaQueryBuilder(tree, alias, knex, aliasToColumn = {
           }
           break;
         default: {
-          const res = mapFunctionName({pt, knex, alias, aliasToCol: aliasToColumn, fn, colAlias})
+          const res = mapFunctionName({pt, knex, alias, a, aliasToCol: aliasToColumn, fn, colAlias, prevBinaryOp})
           if (res) return res;
         }
           break
@@ -70,6 +70,17 @@ export default function formulaQueryBuilder(tree, alias, knex, aliasToColumn = {
         pt.operator = '='
       }
 
+      if (pt.operator === '/') {
+        pt.left = {
+          callee: {name: 'FLOAT'},
+          type: 'CallExpression',
+          arguments: [
+            pt.left
+          ]
+        }
+      }
+
+
       const query = knex.raw(`${fn(pt.left, null, pt.operator).toQuery()} ${pt.operator} ${fn(pt.right, null, pt.operator).toQuery()}${colAlias}`)
       if (prevBinaryOp && pt.operator !== prevBinaryOp) {
         query.wrap('(', ')')

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

@@ -31,4 +31,19 @@ export default {
   OR: (args: MapFnArgs) => {
     return args.knex.raw(`${args.knex.raw(`${args.pt.arguments.map(ar => args.fn(ar).toQuery()).join(' OR ')}`).wrap('(', ')').toQuery()}${args.colAlias}`)
   },
+  AVG: (args: MapFnArgs) => {
+    if (args.pt.arguments.length > 1) {
+      return args.fn({
+        type: 'BinaryExpression',
+        operator: '/',
+        left: {...args.pt, callee: {name: 'SUM'}},
+        right: {type: 'Literal', value: args.pt.arguments.length}
+      }, args.a, args.prevBinaryOp)
+    } else {
+      return args.fn(args.pt.arguments[0], args.a, args.prevBinaryOp)
+    }
+  },
+  FLOAT: (args: MapFnArgs) => {
+    return args.fn(args.pt?.arguments?.[0]).wrap('(',')');
+  }
 }

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

@@ -52,6 +52,8 @@ const mssql = {
     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${args.colAlias}`)
   },
   MID:'SUBSTR',
-}
+  FLOAT: (args: MapFnArgs) => {
+    return args.knex.raw(`CAST(${args.fn(args.pt.arguments[0])} as FLOAT)${args.colAlias}`).wrap('(',')')
+}}
 
 export default mssql;

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

@@ -23,6 +23,9 @@ const mysql2 = {
     return args.knex.raw(`SUBSTR(${args.fn(args.pt.arguments[0])},-${args.fn(args.pt.arguments[1])})${args.colAlias}`)
   },
   MID:'SUBSTR',
+  FLOAT: (args: MapFnArgs) => {
+    return args.knex.raw(`CAST(${args.fn(args.pt.arguments[0])} as DOUBLE)${args.colAlias}`).wrap('(',')')
+  }
 }
 
 

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

@@ -18,6 +18,9 @@ const pg = {
     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: (args: MapFnArgs) => {
+    return args.knex.raw(`CAST(${args.fn(args.pt.arguments[0])} as DOUBLE PRECISION)${args.colAlias}`).wrap('(',')')
+  }
 }
 
 

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

@@ -33,6 +33,9 @@ const sqlite3 = {
     return args.knex.raw(`SUBSTR(${args.fn(args.pt.arguments[0])},-${args.fn(args.pt.arguments[1])})${args.colAlias}`)
   },
   MID: 'SUBSTR',
+  FLOAT: (args: MapFnArgs) => {
+    return args.knex.raw(`CAST(${args.fn(args.pt.arguments[0])} as FLOAT)${args.colAlias}`).wrap('(',')')
+  }
 }
 
 

packages/nocodb/src/lib/dataMapper/lib/sql/mapFunctionName.ts

@@ -10,13 +10,17 @@ export interface MapFnArgs {
   aliasToCol: { [alias: string]: string },
   knex: XKnex,
   alias: string,
-  fn: (...args: any) => QueryBuilder,
-  colAlias:string
+  a?: string,
+  fn: (...args: any) => QueryBuilder | any,
+  colAlias: string,
+  prevBinaryOp?: any
 }
 
 const mapFunctionName = (args: MapFnArgs): any => {
+
   const name = args.pt.callee.name;
   let val;
+
   switch (args.knex.clientType()) {
     case 'mysql':
     case 'mysql2':