Postgres Data Source (#9475)

* add postgresql datasource

* add rest of files for postgres datasource

* fix timeseries query, remove unused code

* consistent naming, refactoring

* s/mysql/postgres/

* s/mysql/postgres/

* couple more tests

* tests for more datatypes

* fix macros for postgres

* add __timeSec macro

* add frontend for postgres datasource

* adjust documentation

* fix formatting

* add proper plugin description

* merge editor changes from mysql

* port changes from mysql datasource

* set proper defaultQuery for postgres

* add time_sec to timeseries query
accept int for value for timeseries query

* revert allowing time_sec and handle int or float values as unix
timestamp for "time" column

* fix tslint error

* handle decimal values in timeseries query

* allow setting sslmode for postgres datasource

* use type switch for handling data types

* fix value for timeseries query

* refactor timeseries queries to make them more flexible

* remove debug statement from inner loop in type conversion

* use plain for loop in getTypedRowData

* fix timeseries queries

* adjust postgres datasource to tsdb refactoring

* adjust postgres datasource to frontend changes

* update lib/pq to latest version

* move type conversion to getTypedRowData

* handle address types cidr, inet and macaddr

* adjust response parser and docs for annotations

* convert unknown types to string

* add documentation for postgres datasource

* add another example query with metric column

* set more helpful default query

* update help text in query editor

* handle NULL in value column of timeseries query

* add __timeGroup macro

* add test for __timeGroup macro

* document __timeGroup and set proper default query for annotations

* fix typos in docs

* add postgres to list of datasources

* add postgres to builtInPlugins

* mysql: refactoring as prep for merging postgres

Refactors out the initialization of the xorm engine and the query logic
for an sql data source.

* mysql: rename refactoring + test update

* postgres:refactor to use SqlEngine(same as mysql)

Refactored to use a common base class with the MySql data source.

Other changes from the original PR:
- Changed time column to be time_sec to allow other time units in the
future and to be the same as MySQL
- Changed integration test to test the main Query method rather than
the private transformToTable method
- Changed the __timeSec macro name to __timeEpoch
- Renamed PostgresExecutor to PostgresQueryEndpoint

Fixes #9209 (the original PR)

* postgres: encrypt password on config page

With some other cosmetic changes to the config page:
- placeholder texts
- reset button for the password after it has been encrypted.
- default value for the sslmode field.

* postgres: change back col name to time from time_sec

* postgres mysql: remove annotation title

Title has been removed from annotations

* postgres: fix images for docs page

* postgres mysql: fix specs

vendor/github.com/lib/pq/array.go

@@ -13,7 +13,7 @@ import (
 
 var typeByteSlice = reflect.TypeOf([]byte{})
 var typeDriverValuer = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
-var typeSqlScanner = reflect.TypeOf((*sql.Scanner)(nil)).Elem()
+var typeSQLScanner = reflect.TypeOf((*sql.Scanner)(nil)).Elem()
 
 // Array returns the optimal driver.Valuer and sql.Scanner for an array or
 // slice of any dimension.
@@ -278,7 +278,7 @@ func (GenericArray) evaluateDestination(rt reflect.Type) (reflect.Type, func([]b
 	// TODO calculate the assign function for other types
 	// TODO repeat this section on the element type of arrays or slices (multidimensional)
 	{
-		if reflect.PtrTo(rt).Implements(typeSqlScanner) {
+		if reflect.PtrTo(rt).Implements(typeSQLScanner) {
 			// dest is always addressable because it is an element of a slice.
 			assign = func(src []byte, dest reflect.Value) (err error) {
 				ss := dest.Addr().Interface().(sql.Scanner)
@@ -587,7 +587,7 @@ func appendArrayElement(b []byte, rv reflect.Value) ([]byte, string, error) {
 		}
 	}
 
-	var del string = ","
+	var del = ","
 	var err error
 	var iv interface{} = rv.Interface()
 

vendor/github.com/lib/pq/conn.go

@@ -27,12 +27,12 @@ var (
 	ErrNotSupported              = errors.New("pq: Unsupported command")
 	ErrInFailedTransaction       = errors.New("pq: Could not complete operation in a failed transaction")
 	ErrSSLNotSupported           = errors.New("pq: SSL is not enabled on the server")
-	ErrSSLKeyHasWorldPermissions = errors.New("pq: Private key file has group or world access. Permissions should be u=rw (0600) or less.")
-	ErrCouldNotDetectUsername    = errors.New("pq: Could not detect default username. Please provide one explicitly.")
+	ErrSSLKeyHasWorldPermissions = errors.New("pq: Private key file has group or world access. Permissions should be u=rw (0600) or less")
+	ErrCouldNotDetectUsername    = errors.New("pq: Could not detect default username. Please provide one explicitly")
 
 	errUnexpectedReady = errors.New("unexpected ReadyForQuery")
 	errNoRowsAffected  = errors.New("no RowsAffected available after the empty statement")
-	errNoLastInsertId  = errors.New("no LastInsertId available after the empty statement")
+	errNoLastInsertID  = errors.New("no LastInsertId available after the empty statement")
 )
 
 type Driver struct{}
@@ -131,7 +131,7 @@ type conn struct {
 }
 
 // Handle driver-side settings in parsed connection string.
-func (c *conn) handleDriverSettings(o values) (err error) {
+func (cn *conn) handleDriverSettings(o values) (err error) {
 	boolSetting := func(key string, val *bool) error {
 		if value, ok := o[key]; ok {
 			if value == "yes" {
@@ -145,18 +145,18 @@ func (c *conn) handleDriverSettings(o values) (err error) {
 		return nil
 	}
 
-	err = boolSetting("disable_prepared_binary_result", &c.disablePreparedBinaryResult)
+	err = boolSetting("disable_prepared_binary_result", &cn.disablePreparedBinaryResult)
 	if err != nil {
 		return err
 	}
-	err = boolSetting("binary_parameters", &c.binaryParameters)
+	err = boolSetting("binary_parameters", &cn.binaryParameters)
 	if err != nil {
 		return err
 	}
 	return nil
 }
 
-func (c *conn) handlePgpass(o values) {
+func (cn *conn) handlePgpass(o values) {
 	// if a password was supplied, do not process .pgpass
 	if _, ok := o["password"]; ok {
 		return
@@ -229,10 +229,10 @@ func (c *conn) handlePgpass(o values) {
 	}
 }
 
-func (c *conn) writeBuf(b byte) *writeBuf {
-	c.scratch[0] = b
+func (cn *conn) writeBuf(b byte) *writeBuf {
+	cn.scratch[0] = b
 	return &writeBuf{
-		buf: c.scratch[:5],
+		buf: cn.scratch[:5],
 		pos: 1,
 	}
 }
@@ -310,9 +310,8 @@ func DialOpen(d Dialer, name string) (_ driver.Conn, err error) {
 		u, err := userCurrent()
 		if err != nil {
 			return nil, err
-		} else {
-			o["user"] = u
 		}
+		o["user"] = u
 	}
 
 	cn := &conn{
@@ -698,7 +697,7 @@ var emptyRows noRows
 var _ driver.Result = noRows{}
 
 func (noRows) LastInsertId() (int64, error) {
-	return 0, errNoLastInsertId
+	return 0, errNoLastInsertID
 }
 
 func (noRows) RowsAffected() (int64, error) {
@@ -707,7 +706,7 @@ func (noRows) RowsAffected() (int64, error) {
 
 // Decides which column formats to use for a prepared statement.  The input is
 // an array of type oids, one element per result column.
-func decideColumnFormats(colTyps []oid.Oid, forceText bool) (colFmts []format, colFmtData []byte) {
+func decideColumnFormats(colTyps []fieldDesc, forceText bool) (colFmts []format, colFmtData []byte) {
 	if len(colTyps) == 0 {
 		return nil, colFmtDataAllText
 	}
@@ -719,8 +718,8 @@ func decideColumnFormats(colTyps []oid.Oid, forceText bool) (colFmts []format, c
 
 	allBinary := true
 	allText := true
-	for i, o := range colTyps {
-		switch o {
+	for i, t := range colTyps {
+		switch t.OID {
 		// This is the list of types to use binary mode for when receiving them
 		// through a prepared statement.  If a type appears in this list, it
 		// must also be implemented in binaryDecode in encode.go.
@@ -840,16 +839,15 @@ func (cn *conn) query(query string, args []driver.Value) (_ *rows, err error) {
 		rows.colNames, rows.colFmts, rows.colTyps = cn.readPortalDescribeResponse()
 		cn.postExecuteWorkaround()
 		return rows, nil
-	} else {
-		st := cn.prepareTo(query, "")
-		st.exec(args)
-		return &rows{
-			cn:       cn,
-			colNames: st.colNames,
-			colTyps:  st.colTyps,
-			colFmts:  st.colFmts,
-		}, nil
 	}
+	st := cn.prepareTo(query, "")
+	st.exec(args)
+	return &rows{
+		cn:       cn,
+		colNames: st.colNames,
+		colTyps:  st.colTyps,
+		colFmts:  st.colFmts,
+	}, nil
 }
 
 // Implement the optional "Execer" interface for one-shot queries
@@ -876,17 +874,16 @@ func (cn *conn) Exec(query string, args []driver.Value) (res driver.Result, err
 		cn.postExecuteWorkaround()
 		res, _, err = cn.readExecuteResponse("Execute")
 		return res, err
-	} else {
-		// Use the unnamed statement to defer planning until bind
-		// time, or else value-based selectivity estimates cannot be
-		// used.
-		st := cn.prepareTo(query, "")
-		r, err := st.Exec(args)
-		if err != nil {
-			panic(err)
-		}
-		return r, err
 	}
+	// Use the unnamed statement to defer planning until bind
+	// time, or else value-based selectivity estimates cannot be
+	// used.
+	st := cn.prepareTo(query, "")
+	r, err := st.Exec(args)
+	if err != nil {
+		panic(err)
+	}
+	return r, err
 }
 
 func (cn *conn) send(m *writeBuf) {
@@ -1147,10 +1144,10 @@ const formatText format = 0
 const formatBinary format = 1
 
 // One result-column format code with the value 1 (i.e. all binary).
-var colFmtDataAllBinary []byte = []byte{0, 1, 0, 1}
+var colFmtDataAllBinary = []byte{0, 1, 0, 1}
 
 // No result-column format codes (i.e. all text).
-var colFmtDataAllText []byte = []byte{0, 0}
+var colFmtDataAllText = []byte{0, 0}
 
 type stmt struct {
 	cn         *conn
@@ -1158,7 +1155,7 @@ type stmt struct {
 	colNames   []string
 	colFmts    []format
 	colFmtData []byte
-	colTyps    []oid.Oid
+	colTyps    []fieldDesc
 	paramTyps  []oid.Oid
 	closed     bool
 }
@@ -1321,7 +1318,7 @@ type rows struct {
 	cn       *conn
 	finish   func()
 	colNames []string
-	colTyps  []oid.Oid
+	colTyps  []fieldDesc
 	colFmts  []format
 	done     bool
 	rb       readBuf
@@ -1409,7 +1406,7 @@ func (rs *rows) Next(dest []driver.Value) (err error) {
 					dest[i] = nil
 					continue
 				}
-				dest[i] = decode(&conn.parameterStatus, rs.rb.next(l), rs.colTyps[i], rs.colFmts[i])
+				dest[i] = decode(&conn.parameterStatus, rs.rb.next(l), rs.colTyps[i].OID, rs.colFmts[i])
 			}
 			return
 		case 'T':
@@ -1515,7 +1512,7 @@ func (cn *conn) sendBinaryModeQuery(query string, args []driver.Value) {
 	cn.send(b)
 }
 
-func (c *conn) processParameterStatus(r *readBuf) {
+func (cn *conn) processParameterStatus(r *readBuf) {
 	var err error
 
 	param := r.string()
@@ -1526,13 +1523,13 @@ func (c *conn) processParameterStatus(r *readBuf) {
 		var minor int
 		_, err = fmt.Sscanf(r.string(), "%d.%d.%d", &major1, &major2, &minor)
 		if err == nil {
-			c.parameterStatus.serverVersion = major1*10000 + major2*100 + minor
+			cn.parameterStatus.serverVersion = major1*10000 + major2*100 + minor
 		}
 
 	case "TimeZone":
-		c.parameterStatus.currentLocation, err = time.LoadLocation(r.string())
+		cn.parameterStatus.currentLocation, err = time.LoadLocation(r.string())
 		if err != nil {
-			c.parameterStatus.currentLocation = nil
+			cn.parameterStatus.currentLocation = nil
 		}
 
 	default:
@@ -1540,8 +1537,8 @@ func (c *conn) processParameterStatus(r *readBuf) {
 	}
 }
 
-func (c *conn) processReadyForQuery(r *readBuf) {
-	c.txnStatus = transactionStatus(r.byte())
+func (cn *conn) processReadyForQuery(r *readBuf) {
+	cn.txnStatus = transactionStatus(r.byte())
 }
 
 func (cn *conn) readReadyForQuery() {
@@ -1556,9 +1553,9 @@ func (cn *conn) readReadyForQuery() {
 	}
 }
 
-func (c *conn) processBackendKeyData(r *readBuf) {
-	c.processID = r.int32()
-	c.secretKey = r.int32()
+func (cn *conn) processBackendKeyData(r *readBuf) {
+	cn.processID = r.int32()
+	cn.secretKey = r.int32()
 }
 
 func (cn *conn) readParseResponse() {
@@ -1576,7 +1573,7 @@ func (cn *conn) readParseResponse() {
 	}
 }
 
-func (cn *conn) readStatementDescribeResponse() (paramTyps []oid.Oid, colNames []string, colTyps []oid.Oid) {
+func (cn *conn) readStatementDescribeResponse() (paramTyps []oid.Oid, colNames []string, colTyps []fieldDesc) {
 	for {
 		t, r := cn.recv1()
 		switch t {
@@ -1602,7 +1599,7 @@ func (cn *conn) readStatementDescribeResponse() (paramTyps []oid.Oid, colNames [
 	}
 }
 
-func (cn *conn) readPortalDescribeResponse() (colNames []string, colFmts []format, colTyps []oid.Oid) {
+func (cn *conn) readPortalDescribeResponse() (colNames []string, colFmts []format, colTyps []fieldDesc) {
 	t, r := cn.recv1()
 	switch t {
 	case 'T':
@@ -1698,31 +1695,33 @@ func (cn *conn) readExecuteResponse(protocolState string) (res driver.Result, co
 	}
 }
 
-func parseStatementRowDescribe(r *readBuf) (colNames []string, colTyps []oid.Oid) {
+func parseStatementRowDescribe(r *readBuf) (colNames []string, colTyps []fieldDesc) {
 	n := r.int16()
 	colNames = make([]string, n)
-	colTyps = make([]oid.Oid, n)
+	colTyps = make([]fieldDesc, n)
 	for i := range colNames {
 		colNames[i] = r.string()
 		r.next(6)
-		colTyps[i] = r.oid()
-		r.next(6)
+		colTyps[i].OID = r.oid()
+		colTyps[i].Len = r.int16()
+		colTyps[i].Mod = r.int32()
 		// format code not known when describing a statement; always 0
 		r.next(2)
 	}
 	return
 }
 
-func parsePortalRowDescribe(r *readBuf) (colNames []string, colFmts []format, colTyps []oid.Oid) {
+func parsePortalRowDescribe(r *readBuf) (colNames []string, colFmts []format, colTyps []fieldDesc) {
 	n := r.int16()
 	colNames = make([]string, n)
 	colFmts = make([]format, n)
-	colTyps = make([]oid.Oid, n)
+	colTyps = make([]fieldDesc, n)
 	for i := range colNames {
 		colNames[i] = r.string()
 		r.next(6)
-		colTyps[i] = r.oid()
-		r.next(6)
+		colTyps[i].OID = r.oid()
+		colTyps[i].Len = r.int16()
+		colTyps[i].Mod = r.int32()
 		colFmts[i] = format(r.int16())
 	}
 	return

vendor/github.com/lib/pq/hstore/hstore_test.go

@@ -1,147 +0,0 @@
-package hstore
-
-import (
-	"database/sql"
-	_ "github.com/lib/pq"
-	"os"
-	"testing"
-)
-
-type Fatalistic interface {
-	Fatal(args ...interface{})
-}
-
-func openTestConn(t Fatalistic) *sql.DB {
-	datname := os.Getenv("PGDATABASE")
-	sslmode := os.Getenv("PGSSLMODE")
-
-	if datname == "" {
-		os.Setenv("PGDATABASE", "pqgotest")
-	}
-
-	if sslmode == "" {
-		os.Setenv("PGSSLMODE", "disable")
-	}
-
-	conn, err := sql.Open("postgres", "")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	return conn
-}
-
-func TestHstore(t *testing.T) {
-	db := openTestConn(t)
-	defer db.Close()
-
-	// quitely create hstore if it doesn't exist
-	_, err := db.Exec("CREATE EXTENSION IF NOT EXISTS hstore")
-	if err != nil {
-		t.Skipf("Skipping hstore tests - hstore extension create failed: %s", err.Error())
-	}
-
-	hs := Hstore{}
-
-	// test for null-valued hstores
-	err = db.QueryRow("SELECT NULL::hstore").Scan(&hs)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if hs.Map != nil {
-		t.Fatalf("expected null map")
-	}
-
-	err = db.QueryRow("SELECT $1::hstore", hs).Scan(&hs)
-	if err != nil {
-		t.Fatalf("re-query null map failed: %s", err.Error())
-	}
-	if hs.Map != nil {
-		t.Fatalf("expected null map")
-	}
-
-	// test for empty hstores
-	err = db.QueryRow("SELECT ''::hstore").Scan(&hs)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if hs.Map == nil {
-		t.Fatalf("expected empty map, got null map")
-	}
-	if len(hs.Map) != 0 {
-		t.Fatalf("expected empty map, got len(map)=%d", len(hs.Map))
-	}
-
-	err = db.QueryRow("SELECT $1::hstore", hs).Scan(&hs)
-	if err != nil {
-		t.Fatalf("re-query empty map failed: %s", err.Error())
-	}
-	if hs.Map == nil {
-		t.Fatalf("expected empty map, got null map")
-	}
-	if len(hs.Map) != 0 {
-		t.Fatalf("expected empty map, got len(map)=%d", len(hs.Map))
-	}
-
-	// a few example maps to test out
-	hsOnePair := Hstore{
-		Map: map[string]sql.NullString{
-			"key1": {"value1", true},
-		},
-	}
-
-	hsThreePairs := Hstore{
-		Map: map[string]sql.NullString{
-			"key1": {"value1", true},
-			"key2": {"value2", true},
-			"key3": {"value3", true},
-		},
-	}
-
-	hsSmorgasbord := Hstore{
-		Map: map[string]sql.NullString{
-			"nullstring":             {"NULL", true},
-			"actuallynull":           {"", false},
-			"NULL":                   {"NULL string key", true},
-			"withbracket":            {"value>42", true},
-			"withequal":              {"value=42", true},
-			`"withquotes1"`:          {`this "should" be fine`, true},
-			`"withquotes"2"`:         {`this "should\" also be fine`, true},
-			"embedded1":              {"value1=>x1", true},
-			"embedded2":              {`"value2"=>x2`, true},
-			"withnewlines":           {"\n\nvalue\t=>2", true},
-			"<<all sorts of crazy>>": {`this, "should,\" also, => be fine`, true},
-		},
-	}
-
-	// test encoding in query params, then decoding during Scan
-	testBidirectional := func(h Hstore) {
-		err = db.QueryRow("SELECT $1::hstore", h).Scan(&hs)
-		if err != nil {
-			t.Fatalf("re-query %d-pair map failed: %s", len(h.Map), err.Error())
-		}
-		if hs.Map == nil {
-			t.Fatalf("expected %d-pair map, got null map", len(h.Map))
-		}
-		if len(hs.Map) != len(h.Map) {
-			t.Fatalf("expected %d-pair map, got len(map)=%d", len(h.Map), len(hs.Map))
-		}
-
-		for key, val := range hs.Map {
-			otherval, found := h.Map[key]
-			if !found {
-				t.Fatalf("  key '%v' not found in %d-pair map", key, len(h.Map))
-			}
-			if otherval.Valid != val.Valid {
-				t.Fatalf("  value %v <> %v in %d-pair map", otherval, val, len(h.Map))
-			}
-			if otherval.String != val.String {
-				t.Fatalf("  value '%v' <> '%v' in %d-pair map", otherval.String, val.String, len(h.Map))
-			}
-		}
-	}
-
-	testBidirectional(hsOnePair)
-	testBidirectional(hsThreePairs)
-	testBidirectional(hsSmorgasbord)
-}

vendor/github.com/lib/pq/listen_example/doc.go

@@ -18,11 +18,11 @@ mechanism to avoid polling the database while waiting for more work to arrive.
     package main
 
     import (
-        "github.com/lib/pq"
-
         "database/sql"
         "fmt"
         "time"
+
+        "github.com/lib/pq"
     )
 
     func doWork(db *sql.DB, work int64) {
@@ -51,21 +51,15 @@ mechanism to avoid polling the database while waiting for more work to arrive.
     }
 
     func waitForNotification(l *pq.Listener) {
-        for {
-            select {
-                case <-l.Notify:
-                    fmt.Println("received notification, new work available")
-                    return
-                case <-time.After(90 * time.Second):
-                    go func() {
-                        l.Ping()
-                    }()
-                    // Check if there's more work available, just in case it takes
-                    // a while for the Listener to notice connection loss and
-                    // reconnect.
-                    fmt.Println("received no work for 90 seconds, checking for new work")
-                    return
-            }
+        select {
+            case <-l.Notify:
+                fmt.Println("received notification, new work available")
+            case <-time.After(90 * time.Second):
+                go l.Ping()
+                // Check if there's more work available, just in case it takes
+                // a while for the Listener to notice connection loss and
+                // reconnect.
+                fmt.Println("received no work for 90 seconds, checking for new work")
         }
     }
 

vendor/github.com/lib/pq/oid/gen.go

@@ -1,74 +0,0 @@
-// +build ignore
-
-// Generate the table of OID values
-// Run with 'go run gen.go'.
-package main
-
-import (
-	"fmt"
-	"log"
-	"os"
-	"os/exec"
-
-	"database/sql"
-	_ "github.com/lib/pq"
-)
-
-func main() {
-	datname := os.Getenv("PGDATABASE")
-	sslmode := os.Getenv("PGSSLMODE")
-
-	if datname == "" {
-		os.Setenv("PGDATABASE", "pqgotest")
-	}
-
-	if sslmode == "" {
-		os.Setenv("PGSSLMODE", "disable")
-	}
-
-	db, err := sql.Open("postgres", "")
-	if err != nil {
-		log.Fatal(err)
-	}
-	cmd := exec.Command("gofmt")
-	cmd.Stderr = os.Stderr
-	w, err := cmd.StdinPipe()
-	if err != nil {
-		log.Fatal(err)
-	}
-	f, err := os.Create("types.go")
-	if err != nil {
-		log.Fatal(err)
-	}
-	cmd.Stdout = f
-	err = cmd.Start()
-	if err != nil {
-		log.Fatal(err)
-	}
-	fmt.Fprintln(w, "// generated by 'go run gen.go'; do not edit")
-	fmt.Fprintln(w, "\npackage oid")
-	fmt.Fprintln(w, "const (")
-	rows, err := db.Query(`
-		SELECT typname, oid
-		FROM pg_type WHERE oid < 10000
-		ORDER BY oid;
-	`)
-	if err != nil {
-		log.Fatal(err)
-	}
-	var name string
-	var oid int
-	for rows.Next() {
-		err = rows.Scan(&name, &oid)
-		if err != nil {
-			log.Fatal(err)
-		}
-		fmt.Fprintf(w, "T_%s Oid = %d\n", name, oid)
-	}
-	if err = rows.Err(); err != nil {
-		log.Fatal(err)
-	}
-	fmt.Fprintln(w, ")")
-	w.Close()
-	cmd.Wait()
-}

vendor/github.com/lib/pq/oid/types.go

@@ -1,4 +1,4 @@
-// generated by 'go run gen.go'; do not edit
+// Code generated by gen.go. DO NOT EDIT.
 
 package oid
 
@@ -18,6 +18,7 @@ const (
 	T_xid              Oid = 28
 	T_cid              Oid = 29
 	T_oidvector        Oid = 30
+	T_pg_ddl_command   Oid = 32
 	T_pg_type          Oid = 71
 	T_pg_attribute     Oid = 75
 	T_pg_proc          Oid = 81
@@ -28,6 +29,7 @@ const (
 	T_pg_node_tree     Oid = 194
 	T__json            Oid = 199
 	T_smgr             Oid = 210
+	T_index_am_handler Oid = 325
 	T_point            Oid = 600
 	T_lseg             Oid = 601
 	T_path             Oid = 602
@@ -133,6 +135,9 @@ const (
 	T__uuid            Oid = 2951
 	T_txid_snapshot    Oid = 2970
 	T_fdw_handler      Oid = 3115
+	T_pg_lsn           Oid = 3220
+	T__pg_lsn          Oid = 3221
+	T_tsm_handler      Oid = 3310
 	T_anyenum          Oid = 3500
 	T_tsvector         Oid = 3614
 	T_tsquery          Oid = 3615
@@ -144,6 +149,8 @@ const (
 	T__regconfig       Oid = 3735
 	T_regdictionary    Oid = 3769
 	T__regdictionary   Oid = 3770
+	T_jsonb            Oid = 3802
+	T__jsonb           Oid = 3807
 	T_anyrange         Oid = 3831
 	T_event_trigger    Oid = 3838
 	T_int4range        Oid = 3904
@@ -158,4 +165,179 @@ const (
 	T__daterange       Oid = 3913
 	T_int8range        Oid = 3926
 	T__int8range       Oid = 3927
+	T_pg_shseclabel    Oid = 4066
+	T_regnamespace     Oid = 4089
+	T__regnamespace    Oid = 4090
+	T_regrole          Oid = 4096
+	T__regrole         Oid = 4097
 )
+
+var TypeName = map[Oid]string{
+	T_bool:             "BOOL",
+	T_bytea:            "BYTEA",
+	T_char:             "CHAR",
+	T_name:             "NAME",
+	T_int8:             "INT8",
+	T_int2:             "INT2",
+	T_int2vector:       "INT2VECTOR",
+	T_int4:             "INT4",
+	T_regproc:          "REGPROC",
+	T_text:             "TEXT",
+	T_oid:              "OID",
+	T_tid:              "TID",
+	T_xid:              "XID",
+	T_cid:              "CID",
+	T_oidvector:        "OIDVECTOR",
+	T_pg_ddl_command:   "PG_DDL_COMMAND",
+	T_pg_type:          "PG_TYPE",
+	T_pg_attribute:     "PG_ATTRIBUTE",
+	T_pg_proc:          "PG_PROC",
+	T_pg_class:         "PG_CLASS",
+	T_json:             "JSON",
+	T_xml:              "XML",
+	T__xml:             "_XML",
+	T_pg_node_tree:     "PG_NODE_TREE",
+	T__json:            "_JSON",
+	T_smgr:             "SMGR",
+	T_index_am_handler: "INDEX_AM_HANDLER",
+	T_point:            "POINT",
+	T_lseg:             "LSEG",
+	T_path:             "PATH",
+	T_box:              "BOX",
+	T_polygon:          "POLYGON",
+	T_line:             "LINE",
+	T__line:            "_LINE",
+	T_cidr:             "CIDR",
+	T__cidr:            "_CIDR",
+	T_float4:           "FLOAT4",
+	T_float8:           "FLOAT8",
+	T_abstime:          "ABSTIME",
+	T_reltime:          "RELTIME",
+	T_tinterval:        "TINTERVAL",
+	T_unknown:          "UNKNOWN",
+	T_circle:           "CIRCLE",
+	T__circle:          "_CIRCLE",
+	T_money:            "MONEY",
+	T__money:           "_MONEY",
+	T_macaddr:          "MACADDR",
+	T_inet:             "INET",
+	T__bool:            "_BOOL",
+	T__bytea:           "_BYTEA",
+	T__char:            "_CHAR",
+	T__name:            "_NAME",
+	T__int2:            "_INT2",
+	T__int2vector:      "_INT2VECTOR",
+	T__int4:            "_INT4",
+	T__regproc:         "_REGPROC",
+	T__text:            "_TEXT",
+	T__tid:             "_TID",
+	T__xid:             "_XID",
+	T__cid:             "_CID",
+	T__oidvector:       "_OIDVECTOR",
+	T__bpchar:          "_BPCHAR",
+	T__varchar:         "_VARCHAR",
+	T__int8:            "_INT8",
+	T__point:           "_POINT",
+	T__lseg:            "_LSEG",
+	T__path:            "_PATH",
+	T__box:             "_BOX",
+	T__float4:          "_FLOAT4",
+	T__float8:          "_FLOAT8",
+	T__abstime:         "_ABSTIME",
+	T__reltime:         "_RELTIME",
+	T__tinterval:       "_TINTERVAL",
+	T__polygon:         "_POLYGON",
+	T__oid:             "_OID",
+	T_aclitem:          "ACLITEM",
+	T__aclitem:         "_ACLITEM",
+	T__macaddr:         "_MACADDR",
+	T__inet:            "_INET",
+	T_bpchar:           "BPCHAR",
+	T_varchar:          "VARCHAR",
+	T_date:             "DATE",
+	T_time:             "TIME",
+	T_timestamp:        "TIMESTAMP",
+	T__timestamp:       "_TIMESTAMP",
+	T__date:            "_DATE",
+	T__time:            "_TIME",
+	T_timestamptz:      "TIMESTAMPTZ",
+	T__timestamptz:     "_TIMESTAMPTZ",
+	T_interval:         "INTERVAL",
+	T__interval:        "_INTERVAL",
+	T__numeric:         "_NUMERIC",
+	T_pg_database:      "PG_DATABASE",
+	T__cstring:         "_CSTRING",
+	T_timetz:           "TIMETZ",
+	T__timetz:          "_TIMETZ",
+	T_bit:              "BIT",
+	T__bit:             "_BIT",
+	T_varbit:           "VARBIT",
+	T__varbit:          "_VARBIT",
+	T_numeric:          "NUMERIC",
+	T_refcursor:        "REFCURSOR",
+	T__refcursor:       "_REFCURSOR",
+	T_regprocedure:     "REGPROCEDURE",
+	T_regoper:          "REGOPER",
+	T_regoperator:      "REGOPERATOR",
+	T_regclass:         "REGCLASS",
+	T_regtype:          "REGTYPE",
+	T__regprocedure:    "_REGPROCEDURE",
+	T__regoper:         "_REGOPER",
+	T__regoperator:     "_REGOPERATOR",
+	T__regclass:        "_REGCLASS",
+	T__regtype:         "_REGTYPE",
+	T_record:           "RECORD",
+	T_cstring:          "CSTRING",
+	T_any:              "ANY",
+	T_anyarray:         "ANYARRAY",
+	T_void:             "VOID",
+	T_trigger:          "TRIGGER",
+	T_language_handler: "LANGUAGE_HANDLER",
+	T_internal:         "INTERNAL",
+	T_opaque:           "OPAQUE",
+	T_anyelement:       "ANYELEMENT",
+	T__record:          "_RECORD",
+	T_anynonarray:      "ANYNONARRAY",
+	T_pg_authid:        "PG_AUTHID",
+	T_pg_auth_members:  "PG_AUTH_MEMBERS",
+	T__txid_snapshot:   "_TXID_SNAPSHOT",
+	T_uuid:             "UUID",
+	T__uuid:            "_UUID",
+	T_txid_snapshot:    "TXID_SNAPSHOT",
+	T_fdw_handler:      "FDW_HANDLER",
+	T_pg_lsn:           "PG_LSN",
+	T__pg_lsn:          "_PG_LSN",
+	T_tsm_handler:      "TSM_HANDLER",
+	T_anyenum:          "ANYENUM",
+	T_tsvector:         "TSVECTOR",
+	T_tsquery:          "TSQUERY",
+	T_gtsvector:        "GTSVECTOR",
+	T__tsvector:        "_TSVECTOR",
+	T__gtsvector:       "_GTSVECTOR",
+	T__tsquery:         "_TSQUERY",
+	T_regconfig:        "REGCONFIG",
+	T__regconfig:       "_REGCONFIG",
+	T_regdictionary:    "REGDICTIONARY",
+	T__regdictionary:   "_REGDICTIONARY",
+	T_jsonb:            "JSONB",
+	T__jsonb:           "_JSONB",
+	T_anyrange:         "ANYRANGE",
+	T_event_trigger:    "EVENT_TRIGGER",
+	T_int4range:        "INT4RANGE",
+	T__int4range:       "_INT4RANGE",
+	T_numrange:         "NUMRANGE",
+	T__numrange:        "_NUMRANGE",
+	T_tsrange:          "TSRANGE",
+	T__tsrange:         "_TSRANGE",
+	T_tstzrange:        "TSTZRANGE",
+	T__tstzrange:       "_TSTZRANGE",
+	T_daterange:        "DATERANGE",
+	T__daterange:       "_DATERANGE",
+	T_int8range:        "INT8RANGE",
+	T__int8range:       "_INT8RANGE",
+	T_pg_shseclabel:    "PG_SHSECLABEL",
+	T_regnamespace:     "REGNAMESPACE",
+	T__regnamespace:    "_REGNAMESPACE",
+	T_regrole:          "REGROLE",
+	T__regrole:         "_REGROLE",
+}

vendor/github.com/lib/pq/rows.go

@@ -0,0 +1,93 @@
+package pq
+
+import (
+	"math"
+	"reflect"
+	"time"
+
+	"github.com/lib/pq/oid"
+)
+
+const headerSize = 4
+
+type fieldDesc struct {
+	// The object ID of the data type.
+	OID oid.Oid
+	// The data type size (see pg_type.typlen).
+	// Note that negative values denote variable-width types.
+	Len int
+	// The type modifier (see pg_attribute.atttypmod).
+	// The meaning of the modifier is type-specific.
+	Mod int
+}
+
+func (fd fieldDesc) Type() reflect.Type {
+	switch fd.OID {
+	case oid.T_int8:
+		return reflect.TypeOf(int64(0))
+	case oid.T_int4:
+		return reflect.TypeOf(int32(0))
+	case oid.T_int2:
+		return reflect.TypeOf(int16(0))
+	case oid.T_varchar, oid.T_text:
+		return reflect.TypeOf("")
+	case oid.T_bool:
+		return reflect.TypeOf(false)
+	case oid.T_date, oid.T_time, oid.T_timetz, oid.T_timestamp, oid.T_timestamptz:
+		return reflect.TypeOf(time.Time{})
+	case oid.T_bytea:
+		return reflect.TypeOf([]byte(nil))
+	default:
+		return reflect.TypeOf(new(interface{})).Elem()
+	}
+}
+
+func (fd fieldDesc) Name() string {
+	return oid.TypeName[fd.OID]
+}
+
+func (fd fieldDesc) Length() (length int64, ok bool) {
+	switch fd.OID {
+	case oid.T_text, oid.T_bytea:
+		return math.MaxInt64, true
+	case oid.T_varchar, oid.T_bpchar:
+		return int64(fd.Mod - headerSize), true
+	default:
+		return 0, false
+	}
+}
+
+func (fd fieldDesc) PrecisionScale() (precision, scale int64, ok bool) {
+	switch fd.OID {
+	case oid.T_numeric, oid.T__numeric:
+		mod := fd.Mod - headerSize
+		precision = int64((mod >> 16) & 0xffff)
+		scale = int64(mod & 0xffff)
+		return precision, scale, true
+	default:
+		return 0, 0, false
+	}
+}
+
+// ColumnTypeScanType returns the value type that can be used to scan types into.
+func (rs *rows) ColumnTypeScanType(index int) reflect.Type {
+	return rs.colTyps[index].Type()
+}
+
+// ColumnTypeDatabaseTypeName return the database system type name.
+func (rs *rows) ColumnTypeDatabaseTypeName(index int) string {
+	return rs.colTyps[index].Name()
+}
+
+// ColumnTypeLength returns the length of the column type if the column is a
+// variable length type. If the column is not a variable length type ok
+// should return false.
+func (rs *rows) ColumnTypeLength(index int) (length int64, ok bool) {
+	return rs.colTyps[index].Length()
+}
+
+// ColumnTypePrecisionScale should return the precision and scale for decimal
+// types. If not applicable, ok should be false.
+func (rs *rows) ColumnTypePrecisionScale(index int) (precision, scale int64, ok bool) {
+	return rs.colTyps[index].PrecisionScale()
+}

vendor/vendor.json

@@ -461,10 +461,31 @@
 			"revisionTime": "2017-02-10T14:05:23Z"
 		},
 		{
-			"checksumSHA1": "ZAj/o03zG8Ui4mZ4XmzU4yyKC04=",
+			"checksumSHA1": "RYMOEINLFNWIJk8aKNifSlPhg9U=",
 			"path": "github.com/lib/pq",
-			"revision": "dd1fe2071026ce53f36a39112e645b4d4f5793a4",
-			"revisionTime": "2017-07-07T05:36:02Z"
+			"revision": "23da1db4f16d9658a86ae9b717c245fc078f10f1",
+			"revisionTime": "2017-09-18T17:50:43Z"
+		},
+		{
+			"checksumSHA1": "jaCQF1par6Jl8g+V2Cgp0n/0wSc=",
+			"origin": "github.com/grafana/grafana/vendor/github.com/lib/pq/hstore",
+			"path": "github.com/lib/pq/hstore",
+			"revision": "23da1db4f16d9658a86ae9b717c245fc078f10f1",
+			"revisionTime": "2017-09-18T17:50:43Z"
+		},
+		{
+			"checksumSHA1": "mJHrY33tDs2MRhHt+XunkRF/5ek=",
+			"origin": "github.com/grafana/grafana/vendor/github.com/lib/pq/listen_example",
+			"path": "github.com/lib/pq/listen_example",
+			"revision": "23da1db4f16d9658a86ae9b717c245fc078f10f1",
+			"revisionTime": "2017-09-18T17:50:43Z"
+		},
+		{
+			"checksumSHA1": "AU3fA8Sm33Vj9PBoRPSeYfxLRuE=",
+			"origin": "github.com/grafana/grafana/vendor/github.com/lib/pq/oid",
+			"path": "github.com/lib/pq/oid",
+			"revision": "23da1db4f16d9658a86ae9b717c245fc078f10f1",
+			"revisionTime": "2017-09-18T17:50:43Z"
 		},
 		{
 			"checksumSHA1": "bKMZjd2wPw13VwoE7mBeSv5djFA=",