diff --git a/packages/builder/src/stores/backend/datasources.js b/packages/builder/src/stores/backend/datasources.js
index 7d2db44d6a..ddfef20336 100644
--- a/packages/builder/src/stores/backend/datasources.js
+++ b/packages/builder/src/stores/backend/datasources.js
@@ -25,7 +25,6 @@ export function createDatasourcesStore() {
   const store = writable({
     list: [],
     selectedDatasourceId: null,
-    schemaError: null,
   })
 
   const derivedStore = derived([store, tables], ([$store, $tables]) => {
@@ -75,18 +74,13 @@ export function createDatasourcesStore() {
     store.update(state => ({
       ...state,
       selectedDatasourceId: id,
-      // Remove any possible schema error
-      schemaError: null,
     }))
   }
 
   const updateDatasource = response => {
     const { datasource, error } = response
     if (error) {
-      store.update(state => ({
-        ...state,
-        schemaError: error,
-      }))
+      store.update(state => ({ ...state }))
     }
     replaceDatasource(datasource._id, datasource)
     select(datasource._id)
@@ -171,12 +165,6 @@ export function createDatasourcesStore() {
     replaceDatasource(datasource._id, null)
   }
 
-  const removeSchemaError = () => {
-    store.update(state => {
-      return { ...state, schemaError: null }
-    })
-  }
-
   const replaceDatasource = (datasourceId, datasource) => {
     if (!datasourceId) {
       return
@@ -229,7 +217,6 @@ export function createDatasourcesStore() {
     create,
     update,
     delete: deleteDatasource,
-    removeSchemaError,
     replaceDatasource,
     getTableNames,
   }
diff --git a/packages/server/src/api/controllers/datasource.ts b/packages/server/src/api/controllers/datasource.ts
index 76c29be538..cfbca8eff3 100644
--- a/packages/server/src/api/controllers/datasource.ts
+++ b/packages/server/src/api/controllers/datasource.ts
@@ -18,6 +18,7 @@ import {
   FetchDatasourceInfoResponse,
   IntegrationBase,
   SourceName,
+  Table,
   UpdateDatasourceResponse,
   UserCtx,
   VerifyDatasourceRequest,
@@ -71,46 +72,18 @@ async function getAndMergeDatasource(datasource: Datasource) {
   return await sdk.datasources.enrich(enrichedDatasource)
 }
 
-async function buildSchemaHelper(datasource: Datasource) {
+async function buildSchemaHelper(
+  datasource: Datasource
+): Promise<Record<string, Table>> {
   const connector = (await getConnector(datasource)) as DatasourcePlus
-  await connector.buildSchema(datasource._id!, datasource.entities!)
-
-  const errors = connector.schemaErrors
-  let error = null
-  if (errors && Object.keys(errors).length > 0) {
-    const noKey = getErrorTables(errors, BuildSchemaErrors.NO_KEY)
-    if (noKey.length) {
-      error = updateError(
-        error,
-        "No primary key constraint found for the following:",
-        noKey
-      )
-    }
-
-    const invalidCol = getErrorTables(errors, BuildSchemaErrors.INVALID_COLUMN)
-    if (invalidCol.length) {
-      const invalidCols = Object.values(InvalidColumns).join(", ")
-      error = updateError(
-        error,
-        `Cannot use columns ${invalidCols} found in following:`,
-        invalidCol
-      )
-    }
-
-    const noHeader = getErrorTables(errors, BuildSchemaErrors.NO_HEADER_ROW)
-    if (noHeader.length) {
-      error = updateError(
-        error,
-        `No header row found in the following:`,
-        noHeader
-      )
-    }
-  }
-  return { tables: connector.tables, error }
+  return await connector.buildSchema(datasource._id!, datasource.entities!)
 }
 
-async function buildFilteredSchema(datasource: Datasource, filter?: string[]) {
-  let { tables, error } = await buildSchemaHelper(datasource)
+async function buildFilteredSchema(
+  datasource: Datasource,
+  filter?: string[]
+): Promise<{ tables: Record<string, Table> }> {
+  let tables = await buildSchemaHelper(datasource)
   let finalTables = tables
   if (filter) {
     finalTables = {}
@@ -122,7 +95,7 @@ async function buildFilteredSchema(datasource: Datasource, filter?: string[]) {
       }
     }
   }
-  return { tables: finalTables, error }
+  return { tables: finalTables }
 }
 
 export async function fetch(ctx: UserCtx) {
@@ -166,7 +139,7 @@ export async function buildSchemaFromDb(ctx: UserCtx) {
   const tablesFilter = ctx.request.body.tablesFilter
   const datasource = await sdk.datasources.get(ctx.params.datasourceId)
 
-  const { tables, error } = await buildFilteredSchema(datasource, tablesFilter)
+  const { tables } = await buildFilteredSchema(datasource, tablesFilter)
   datasource.entities = tables
 
   setDefaultDisplayColumns(datasource)
@@ -177,9 +150,6 @@ export async function buildSchemaFromDb(ctx: UserCtx) {
   const cleanedDatasource = await sdk.datasources.removeSecretSingle(datasource)
 
   const res: any = { datasource: cleanedDatasource }
-  if (error) {
-    res.error = error
-  }
   ctx.body = res
 }
 
@@ -308,13 +278,8 @@ export async function save(
     type: plus ? DocumentType.DATASOURCE_PLUS : DocumentType.DATASOURCE,
   }
 
-  let schemaError = null
   if (fetchSchema) {
-    const { tables, error } = await buildFilteredSchema(
-      datasource,
-      tablesFilter
-    )
-    schemaError = error
+    const { tables } = await buildFilteredSchema(datasource, tablesFilter)
     datasource.entities = tables
     setDefaultDisplayColumns(datasource)
   }
@@ -340,9 +305,6 @@ export async function save(
   const response: CreateDatasourceResponse = {
     datasource: await sdk.datasources.removeSecretSingle(datasource),
   }
-  if (schemaError) {
-    response.error = schemaError
-  }
   ctx.body = response
   builderSocket?.emitDatasourceUpdate(ctx, datasource)
 }
diff --git a/packages/server/src/integrations/googlesheets.ts b/packages/server/src/integrations/googlesheets.ts
index 0ee3df12df..c744a8f207 100644
--- a/packages/server/src/integrations/googlesheets.ts
+++ b/packages/server/src/integrations/googlesheets.ts
@@ -14,6 +14,7 @@ import {
   SortJson,
   ExternalTable,
   TableRequest,
+  Table,
 } from "@budibase/types"
 import { OAuth2Client } from "google-auth-library"
 import { buildExternalTableId, finaliseExternalTables } from "./utils"
@@ -138,8 +139,6 @@ const SCHEMA: Integration = {
 class GoogleSheetsIntegration implements DatasourcePlus {
   private readonly config: GoogleSheetsConfig
   private client: GoogleSpreadsheet
-  public tables: Record<string, ExternalTable> = {}
-  public schemaErrors: Record<string, string> = {}
 
   constructor(config: GoogleSheetsConfig) {
     this.config = config
@@ -280,11 +279,11 @@ class GoogleSheetsIntegration implements DatasourcePlus {
 
   async buildSchema(
     datasourceId: string,
-    entities: Record<string, ExternalTable>
-  ) {
+    entities: Record<string, Table>
+  ): Promise<Record<string, Table>> {
     // not fully configured yet
     if (!this.config.auth) {
-      return
+      return {}
     }
     await this.connect()
     const sheets = this.client.sheetsByIndex
@@ -300,7 +299,7 @@ class GoogleSheetsIntegration implements DatasourcePlus {
           // We expect this to always be an Error so if it's not, rethrow it to
           // make sure we don't fail quietly.
           if (!(err instanceof Error)) {
-            throw err;
+            throw err
           }
 
           if (err.message.startsWith("No values in the header row")) {
@@ -308,7 +307,7 @@ class GoogleSheetsIntegration implements DatasourcePlus {
           } else {
             // If we get an error we don't have a BuildSchemaErrors enum variant
             // for, rethrow to avoid failing quietly.
-            throw err;
+            throw err
           }
           return
         }
@@ -323,9 +322,7 @@ class GoogleSheetsIntegration implements DatasourcePlus {
       },
       10
     )
-    const final = finaliseExternalTables(tables, entities)
-    this.tables = final.tables
-    this.schemaErrors = { ...final.errors, ...errors }
+    return finaliseExternalTables(tables, entities)
   }
 
   async query(json: QueryJson) {
diff --git a/packages/server/src/integrations/microsoftSqlServer.ts b/packages/server/src/integrations/microsoftSqlServer.ts
index cd62e590d8..783096a7dd 100644
--- a/packages/server/src/integrations/microsoftSqlServer.ts
+++ b/packages/server/src/integrations/microsoftSqlServer.ts
@@ -11,6 +11,7 @@ import {
   DatasourceFeature,
   ConnectionInfo,
   SourceName,
+  Table,
 } from "@budibase/types"
 import {
   getSqlQuery,
@@ -380,8 +381,8 @@ class SqlServerIntegration extends Sql implements DatasourcePlus {
    */
   async buildSchema(
     datasourceId: string,
-    entities: Record<string, ExternalTable>
-  ) {
+    entities: Record<string, Table>
+  ): Promise<Record<string, Table>> {
     await this.connect()
     let tableInfo: MSSQLTablesResponse[] = await this.runSQL(this.TABLES_SQL)
     if (tableInfo == null || !Array.isArray(tableInfo)) {
@@ -394,7 +395,7 @@ class SqlServerIntegration extends Sql implements DatasourcePlus {
       .map((record: any) => record.TABLE_NAME)
       .filter((name: string) => this.MASTER_TABLES.indexOf(name) === -1)
 
-    const tables: Record<string, ExternalTable> = {}
+    const tables: Record<string, Table> = {}
     for (let tableName of tableNames) {
       // get the column definition (type)
       const definition = await this.runSQL(
@@ -445,9 +446,7 @@ class SqlServerIntegration extends Sql implements DatasourcePlus {
         schema,
       }
     }
-    const final = finaliseExternalTables(tables, entities)
-    this.tables = final.tables
-    this.schemaErrors = final.errors
+    return finaliseExternalTables(tables, entities)
   }
 
   async queryTableNames() {
diff --git a/packages/server/src/integrations/mysql.ts b/packages/server/src/integrations/mysql.ts
index 8a688c5f3b..90d0cd256c 100644
--- a/packages/server/src/integrations/mysql.ts
+++ b/packages/server/src/integrations/mysql.ts
@@ -10,6 +10,7 @@ import {
   DatasourceFeature,
   ConnectionInfo,
   SourceName,
+  Table,
 } from "@budibase/types"
 import {
   getSqlQuery,
@@ -278,9 +279,9 @@ class MySQLIntegration extends Sql implements DatasourcePlus {
 
   async buildSchema(
     datasourceId: string,
-    entities: Record<string, ExternalTable>
-  ) {
-    const tables: { [key: string]: ExternalTable } = {}
+    entities: Record<string, Table>
+  ): Promise<Record<string, Table>> {
+    const tables: { [key: string]: Table } = {}
     await this.connect()
 
     try {
@@ -328,9 +329,7 @@ class MySQLIntegration extends Sql implements DatasourcePlus {
     } finally {
       await this.disconnect()
     }
-    const final = finaliseExternalTables(tables, entities)
-    this.tables = final.tables
-    this.schemaErrors = final.errors
+    return finaliseExternalTables(tables, entities)
   }
 
   async queryTableNames() {
diff --git a/packages/server/src/integrations/oracle.ts b/packages/server/src/integrations/oracle.ts
index 38f0a9d5ac..fc4cd45cf6 100644
--- a/packages/server/src/integrations/oracle.ts
+++ b/packages/server/src/integrations/oracle.ts
@@ -9,6 +9,7 @@ import {
   DatasourcePlus,
   DatasourceFeature,
   ConnectionInfo,
+  Table,
 } from "@budibase/types"
 import {
   buildExternalTableId,
@@ -264,8 +265,8 @@ class OracleIntegration extends Sql implements DatasourcePlus {
    */
   async buildSchema(
     datasourceId: string,
-    entities: Record<string, ExternalTable>
-  ) {
+    entities: Record<string, Table>
+  ): Promise<Record<string, Table>> {
     const columnsResponse = await this.internalQuery<OracleColumnsResponse>({
       sql: this.COLUMNS_SQL,
     })
@@ -326,9 +327,7 @@ class OracleIntegration extends Sql implements DatasourcePlus {
         })
     })
 
-    const final = finaliseExternalTables(tables, entities)
-    this.tables = final.tables
-    this.schemaErrors = final.errors
+    return finaliseExternalTables(tables, entities)
   }
 
   async getTableNames() {
diff --git a/packages/server/src/integrations/postgres.ts b/packages/server/src/integrations/postgres.ts
index c4b7c2bb65..76487f7b65 100644
--- a/packages/server/src/integrations/postgres.ts
+++ b/packages/server/src/integrations/postgres.ts
@@ -10,6 +10,7 @@ import {
   DatasourceFeature,
   ConnectionInfo,
   SourceName,
+  Table,
 } from "@budibase/types"
 import {
   getSqlQuery,
@@ -145,8 +146,6 @@ class PostgresIntegration extends Sql implements DatasourcePlus {
   private readonly config: PostgresConfig
   private index: number = 1
   private open: boolean
-  public tables: Record<string, ExternalTable> = {}
-  public schemaErrors: Record<string, string> = {}
 
   COLUMNS_SQL!: string
 
@@ -273,8 +272,8 @@ class PostgresIntegration extends Sql implements DatasourcePlus {
    */
   async buildSchema(
     datasourceId: string,
-    entities: Record<string, ExternalTable>
-  ) {
+    entities: Record<string, Table>
+  ): Promise<Record<string, Table>> {
     let tableKeys: { [key: string]: string[] } = {}
     await this.openConnection()
     try {
@@ -342,9 +341,7 @@ class PostgresIntegration extends Sql implements DatasourcePlus {
         }
       }
 
-      const final = finaliseExternalTables(tables, entities)
-      this.tables = final.tables
-      this.schemaErrors = final.errors
+      return finaliseExternalTables(tables, entities)
     } catch (err) {
       // @ts-ignore
       throw new Error(err)
diff --git a/packages/server/src/integrations/utils.ts b/packages/server/src/integrations/utils.ts
index db562473e3..6525bd07e2 100644
--- a/packages/server/src/integrations/utils.ts
+++ b/packages/server/src/integrations/utils.ts
@@ -4,13 +4,10 @@ import {
   SearchFilters,
   Datasource,
   FieldType,
+  ExternalTable,
 } from "@budibase/types"
 import { DocumentType, SEPARATOR } from "../db/utils"
-import {
-  BuildSchemaErrors,
-  InvalidColumns,
-  NoEmptyFilterStrings,
-} from "../constants"
+import { NoEmptyFilterStrings } from "../constants"
 import { helpers } from "@budibase/shared-core"
 
 const DOUBLE_SEPARATOR = `${SEPARATOR}${SEPARATOR}`
@@ -266,9 +263,9 @@ export function shouldCopySpecialColumn(
 function copyExistingPropsOver(
   tableName: string,
   table: Table,
-  entities: { [key: string]: any },
-  tableIds: [string]
-) {
+  entities: Record<string, Table>,
+  tableIds: string[]
+): Table {
   if (entities && entities[tableName]) {
     if (entities[tableName]?.primaryDisplay) {
       table.primaryDisplay = entities[tableName].primaryDisplay
@@ -295,42 +292,23 @@ function copyExistingPropsOver(
 
 /**
  * Look through the final table definitions to see if anything needs to be
- * copied over from the old and if any errors have occurred mark them so
- * that the user can be made aware.
+ * copied over from the old.
  * @param tables The list of tables that have been retrieved from the external database.
  * @param entities The old list of tables, if there was any to look for definitions in.
  */
 export function finaliseExternalTables(
-  tables: { [key: string]: any },
-  entities: { [key: string]: any }
-) {
-  const invalidColumns = Object.values(InvalidColumns)
-  let finalTables: { [key: string]: any } = {}
-  const errors: { [key: string]: string } = {}
-  // @ts-ignore
-  const tableIds: [string] = Object.values(tables).map(table => table._id)
+  tables: Record<string, Table>,
+  entities: Record<string, Table>
+): Record<string, Table> {
+  let finalTables: Record<string, Table> = {}
+  const tableIds = Object.values(tables).map(table => table._id!)
   for (let [name, table] of Object.entries(tables)) {
-    const schemaFields = Object.keys(table.schema)
-    // make sure every table has a key
-    if (table.primary == null || table.primary.length === 0) {
-      errors[name] = BuildSchemaErrors.NO_KEY
-      continue
-    } else if (
-      schemaFields.find(field =>
-        invalidColumns.includes(field as InvalidColumns)
-      )
-    ) {
-      errors[name] = BuildSchemaErrors.INVALID_COLUMN
-      continue
-    }
-    // make sure all previous props have been added back
     finalTables[name] = copyExistingPropsOver(name, table, entities, tableIds)
   }
-  // sort the tables by name
-  finalTables = Object.entries(finalTables)
+  // sort the tables by name (TODO(samwho): why?)
+  return Object.entries(finalTables)
     .sort(([a], [b]) => a.localeCompare(b))
     .reduce((r, [k, v]) => ({ ...r, [k]: v }), {})
-  return { tables: finalTables, errors }
 }
 
 /**
diff --git a/packages/types/src/sdk/datasources.ts b/packages/types/src/sdk/datasources.ts
index d6a0d4a7c8..2896bc62f5 100644
--- a/packages/types/src/sdk/datasources.ts
+++ b/packages/types/src/sdk/datasources.ts
@@ -175,13 +175,13 @@ export interface IntegrationBase {
 }
 
 export interface DatasourcePlus extends IntegrationBase {
-  tables: Record<string, Table>
-  schemaErrors: Record<string, string>
-
   // if the datasource supports the use of bindings directly (to protect against SQL injection)
   // this returns the format of the identifier
   getBindingIdentifier(): string
   getStringConcat(parts: string[]): string
-  buildSchema(datasourceId: string, entities: Record<string, Table>): any
+  buildSchema(
+    datasourceId: string,
+    entities: Record<string, Table>
+  ): Promise<Record<string, Table>>
   getTableNames(): Promise<string[]>
 }