fix citext resolution issues (#1629)

* fix citext resolution issues
* add citext end to end test

Author: ryan-berger

internal/codegen/golang/postgresql_type.go

@@ -256,7 +256,7 @@ func postgresType(req *plugin.CodeGenRequest, col *plugin.Column) string {
 		}
 		return "sql.NullTime"
 
-	case "text", "pg_catalog.varchar", "pg_catalog.bpchar", "string":
+	case "text", "pg_catalog.varchar", "pg_catalog.bpchar", "string", "citext":
 		if notNull {
 			return "string"
 		}

internal/endtoend/testdata/citext/pgx/go/db.go

@@ -0,0 +1,9 @@
+CREATE TABLE foo (
+    bar citext,
+    bat citext not null
+);
+
+-- name: GetCitexts :many
+SELECT bar, bat
+FROM foo;
+

internal/endtoend/testdata/citext/pgx/go/models.go

@@ -0,0 +1,13 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "engine": "postgresql",
+      "sql_package": "pgx/v4",
+      "name": "querytest",
+      "schema": "query.sql",
+      "queries": "query.sql"
+    }
+  ]
+}

internal/endtoend/testdata/citext/pgx/go/query.sql.go

@@ -0,0 +1,10 @@
+CREATE TABLE foo (
+    bar citext,
+    bat citext not null
+);
+
+-- name: GetCitexts :many
+SELECT bar, bat
+FROM foo;
+
+

internal/endtoend/testdata/citext/pgx/query.sql

@@ -0,0 +1,12 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "engine": "postgresql",
+      "name": "querytest",
+      "schema": "query.sql",
+      "queries": "query.sql"
+    }
+  ]
+}