dont autoquote, suggest quoted values if requried

public/app/plugins/datasource/postgres/postgres_query.ts

@@ -31,6 +31,14 @@ export default class PostgresQuery {
     this.updateProjection();
   }
 
+  unquoteIdentifier(value) {
+    if (value[0] === '"') {
+      return value.substring(1, value.length - 1).replace('""', '"');
+    } else {
+      return value;
+    }
+  }
+
   quoteIdentifier(value) {
     return '"' + value.replace('"', '""') + '"';
   }

public/app/plugins/datasource/postgres/query_builder.ts

@@ -1,35 +1,39 @@
-
 export class PostgresQueryBuilder {
   constructor(private target, private queryModel) {}
 
   buildSchemaQuery() {
-    var query = "SELECT schema_name FROM information_schema.schemata WHERE";
+    var query = 'SELECT quote_ident(schema_name) FROM information_schema.schemata WHERE';
     query += " schema_name NOT LIKE 'pg_%' AND schema_name NOT LIKE '\\_%' AND schema_name <> 'information_schema';";
 
     return query;
   }
 
   buildTableQuery() {
-    var query = "SELECT table_name FROM information_schema.tables WHERE ";
-    query += "table_schema = " + this.queryModel.quoteLiteral(this.target.schema);
+    var query = 'SELECT quote_ident(table_name) FROM information_schema.tables WHERE ';
+    query += 'table_schema = ' + this.quoteLiteral(this.target.schema);
     return query;
   }
 
+  quoteLiteral(value) {
+    return this.queryModel.quoteLiteral(this.queryModel.unquoteIdentifier(value));
+  }
+
   buildColumnQuery(type?: string) {
-    var query = "SELECT column_name FROM information_schema.columns WHERE ";
-    query += "table_schema = " + this.queryModel.quoteLiteral(this.target.schema);
-    query += " AND table_name = " + this.queryModel.quoteLiteral(this.target.table);
+    var query = 'SELECT quote_ident(column_name) FROM information_schema.columns WHERE ';
+    query += 'table_schema = ' + this.quoteLiteral(this.target.schema);
+    query += ' AND table_name = ' + this.quoteLiteral(this.target.table);
 
     switch (type) {
-      case "time": {
-        query += " AND data_type IN ('timestamp without time zone','timestamp with time zone','bigint','integer','double precision','real')";
+      case 'time': {
+        query +=
+          " AND data_type IN ('timestamp without time zone','timestamp with time zone','bigint','integer','double precision','real')";
         break;
       }
-      case "metric": {
+      case 'metric': {
         query += " AND data_type IN ('text','char','varchar')";
         break;
       }
-      case "value": {
+      case 'value': {
         query += " AND data_type IN ('bigint','integer','double precision','real')";
         break;
       }
@@ -39,27 +43,25 @@ export class PostgresQueryBuilder {
   }
 
   buildValueQuery(column: string) {
-    var query = "SELECT DISTINCT quote_literal(" + this.queryModel.quoteIdentifier(column) + ")";
-    query += " FROM " + this.queryModel.quoteIdentifier(this.target.schema);
-    query += "." + this.queryModel.quoteIdentifier(this.target.table);
-    query += " ORDER BY 1 LIMIT 100";
+    var query = 'SELECT DISTINCT quote_literal(' + column + ')';
+    query += ' FROM ' + this.target.schema + '.' + this.target.table;
+    query += ' ORDER BY 1 LIMIT 100';
     return query;
   }
 
   buildDatatypeQuery(column: string) {
-    var query = "SELECT data_type FROM information_schema.columns WHERE ";
-    query += " table_schema = " + this.queryModel.quoteLiteral(this.target.schema);
-    query += " AND table_name = " + this.queryModel.quoteLiteral(this.target.table);
-    query += " AND column_name = " + this.queryModel.quoteLiteral(column);
+    var query = 'SELECT data_type FROM information_schema.columns WHERE ';
+    query += ' table_schema = ' + this.quoteLiteral(this.target.schema);
+    query += ' AND table_name = ' + this.quoteLiteral(this.target.table);
+    query += ' AND column_name = ' + this.quoteLiteral(column);
     return query;
   }
 
   buildAggregateQuery() {
-    var query = "SELECT DISTINCT proname FROM pg_aggregate ";
-    query += "INNER JOIN pg_proc ON pg_aggregate.aggfnoid = pg_proc.oid ";
-    query += "INNER JOIN pg_type ON pg_type.oid=pg_proc.prorettype ";
+    var query = 'SELECT DISTINCT proname FROM pg_aggregate ';
+    query += 'INNER JOIN pg_proc ON pg_aggregate.aggfnoid = pg_proc.oid ';
+    query += 'INNER JOIN pg_type ON pg_type.oid=pg_proc.prorettype ';
     query += "WHERE pronargs=1 AND typname IN ('int8','float8') AND aggkind='n' ORDER BY 1";
     return query;
   }
-
 }

public/app/plugins/datasource/postgres/sql_part.ts

@@ -25,7 +25,7 @@ function aggregateRenderer(part, innerExpr) {
 }
 
 function columnRenderer(part, innerExpr) {
-  return '"' + part.params[0] + '"';
+  return part.params[0];
 }
 
 function replaceAggregationAddStrategy(selectParts, partModel) {