SQLite: Coerce jsonb columns to json before returning to Go code

internal/codegen/golang/sqlite_type.go

@@ -56,6 +56,9 @@ func sqliteType(req *plugin.GenerateRequest, options *opts.Options, col *plugin.
 		}
 		return "sql.NullTime"
 
+	case "json", "jsonb":
+		return "[]byte"
+
 	case "any":
 		return "interface{}"
 

internal/compiler/expand.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/sqlc-dev/sqlc/internal/config"
+	"github.com/sqlc-dev/sqlc/internal/engine/sqlite"
 	"github.com/sqlc-dev/sqlc/internal/source"
 	"github.com/sqlc-dev/sqlc/internal/sql/ast"
 	"github.com/sqlc-dev/sqlc/internal/sql/astutils"
@@ -149,6 +150,17 @@ func (c *Compiler) expandStmt(qc *QueryCatalog, raw *ast.RawStmt, node ast.Node)
 				if counts[cname] > 1 {
 					cname = tableName + "." + cname
 				}
+				// Under SQLite, neither json nor jsonb are real data types, and
+				// rather just of type blob, so database drivers just return
+				// whatever raw binary is stored as values. This is a problem
+				// for jsonb, which is considered an internal format to SQLite
+				// and no attempt should be made to parse it outside of the
+				// database itself. For jsonb columns in SQLite, wrap returned
+				// columns in `json(col)` to coerce the internal binary format
+				// to JSON parsable by the user-space application.
+				if _, ok := c.parser.(*sqlite.Parser); ok && column.DataType == "jsonb" {
+					cname = "json(" + cname + ")"
+				}
 				cols = append(cols, cname)
 			}
 		}

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

@@ -0,0 +1,15 @@
+-- name: InsertFoo :exec
+INSERT INTO foo (
+    a,
+    b,
+    c,
+    d
+) VALUES (
+    @a,
+    @b,
+    @c,
+    @d
+) RETURNING *;
+
+-- name: SelectFoo :exec
+SELECT * FROM foo;

internal/endtoend/testdata/jsonb/pgx/schema.sql

@@ -0,0 +1,7 @@
+CREATE TABLE foo (
+    a json not null,
+    b jsonb not null,
+    c json,
+    d jsonb
+);
+

internal/endtoend/testdata/jsonb/pgx/sqlc.json

@@ -0,0 +1,13 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "engine": "postgresql",
+      "sql_package": "pgx/v5",
+      "name": "querytest",
+      "schema": "schema.sql",
+      "queries": "query.sql"
+    }
+  ]
+}

internal/endtoend/testdata/jsonb/sqlite/query.sql

@@ -0,0 +1,15 @@
+-- name: InsertFoo :exec
+INSERT INTO foo (
+    a,
+    b,
+    c,
+    d
+) VALUES (
+    @a,
+    @b,
+    @c,
+    @d
+) RETURNING *;
+
+-- name: SelectFoo :exec
+SELECT * FROM foo;

internal/endtoend/testdata/jsonb/sqlite/schema.sql

@@ -0,0 +1,7 @@
+CREATE TABLE foo (
+    a json not null,
+    b jsonb not null,
+    c json,
+    d jsonb
+);
+

internal/endtoend/testdata/jsonb/sqlite/sqlc.json

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