Type mapper and sequence fixes

src/driver/cratedb/CrateDBPostgresDriver.ts

@@ -1,7 +1,10 @@
 import { Driver } from "../Driver"
 import { PostgresDriver } from "../postgres/PostgresDriver"
 import { CrateDBPostgresConnectionOptions } from "./CrateDBPostgresConnectionOptions";
-
+import { ColumnType } from "../types/ColumnTypes"
+import { QueryRunner } from "../../query-runner/QueryRunner"
+import { ReplicationMode } from "../types/ReplicationMode"
+import { CrateDBPostgresQueryRunner } from "./CrateDBPostgresQueryRunner"
 
 abstract class PostgresWrapper extends PostgresDriver {
     options: any
@@ -32,4 +35,55 @@ export class CrateDBPostgresDriver extends PostgresWrapper implements Driver {
         return "gen_random_text_uuid()"
     }
 
+	createQueryRunner(mode: ReplicationMode): QueryRunner {
+        return new CrateDBPostgresQueryRunner(this, mode)
+    }
+
+	normalizeType(column: {
+        type: ColumnType
+        length?: number | string
+        precision?: number | null
+        scale?: number
+    }): string {
+        if (column.type === Number || column.type === "integer") {
+            return "int"
+        } else if (column.type === String) {
+            return "text"
+        } else if (column.type === Date) {
+            return "timestamp"
+        } else if (column.type === Boolean) {
+            return "boolean"
+        } else if (column.type === "uuid") {
+            return "text"
+        } else if (column.type === "json") {            
+            return "object"
+        } else if (column.type === "simple-array") {
+            return "array(text)"
+        } else if (
+            column.type === "double precision" ||
+            column.type === "real"
+        ) {
+            return "double"
+        } else if (
+            column.type === "dec" ||
+            column.type === "numeric" ||
+            column.type === "fixed"
+        ) {
+            return "double"
+        } else if (column.type === "bool" || column.type === "boolean") {
+            return "boolean"
+        } else if (
+            column.type === "nvarchar" ||
+            column.type === "national varchar"
+        ) {
+            return "text"
+        } else if (column.type === "nchar" || column.type === "national char") {
+            return "text"
+        } else if ( ((column.type as string) || "") === "") {
+            return "text"
+        } else {
+            return (column.type as string) || ""
+        }
+    }
+
 }