Feat/pgx pool support

examples/booktest/mysql/db_test.go

@@ -54,7 +54,7 @@ func TestBooks(t *testing.T) {
 		AuthorID:  int32(authorID),
 		Isbn:      "2",
 		Title:     "the second book",
-		BookType: BooksBookTypeFICTION ,
+		BookType:  BooksBookTypeFICTION,
 		Yr:        2016,
 		Available: now,
 		Tags:      "cool,unique",

go.mod

@@ -1,6 +1,6 @@
 module github.com/kyleconroy/sqlc
 
-go 1.15
+go 1.16
 
 require (
 	github.com/antlr/antlr4 v0.0.0-20200209180723-1177c0b58d07

go.sum

@@ -15,7 +15,6 @@ github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
-github.com/Masterminds/semver/v3 v3.1.1 h1:hLg3sBzpNErnxhQtUy/mmLR2I9foDujNK030IGemrRc=
 github.com/Masterminds/semver/v3 v3.1.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=

internal/codegen/golang/driver.go

@@ -0,0 +1,17 @@
+package golang
+
+type Driver string
+
+const (
+	PgxDriver    Driver = "pgx/v4"
+	StdLibDriver Driver = "database/sql"
+)
+
+func DriverFromString(s string) Driver {
+	switch s {
+	case string(PgxDriver):
+		return PgxDriver
+	default:
+		return StdLibDriver
+	}
+}