Pg to bun (#148)

* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes

vendor/github.com/uptrace/bun/query_column_add.go

@@ -0,0 +1,105 @@
+package bun
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+
+	"github.com/uptrace/bun/internal"
+	"github.com/uptrace/bun/schema"
+)
+
+type AddColumnQuery struct {
+	baseQuery
+}
+
+func NewAddColumnQuery(db *DB) *AddColumnQuery {
+	q := &AddColumnQuery{
+		baseQuery: baseQuery{
+			db:   db,
+			conn: db.DB,
+		},
+	}
+	return q
+}
+
+func (q *AddColumnQuery) Conn(db IConn) *AddColumnQuery {
+	q.setConn(db)
+	return q
+}
+
+func (q *AddColumnQuery) Model(model interface{}) *AddColumnQuery {
+	q.setTableModel(model)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *AddColumnQuery) Table(tables ...string) *AddColumnQuery {
+	for _, table := range tables {
+		q.addTable(schema.UnsafeIdent(table))
+	}
+	return q
+}
+
+func (q *AddColumnQuery) TableExpr(query string, args ...interface{}) *AddColumnQuery {
+	q.addTable(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *AddColumnQuery) ModelTableExpr(query string, args ...interface{}) *AddColumnQuery {
+	q.modelTable = schema.SafeQuery(query, args)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *AddColumnQuery) ColumnExpr(query string, args ...interface{}) *AddColumnQuery {
+	q.addColumn(schema.SafeQuery(query, args))
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *AddColumnQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	if q.err != nil {
+		return nil, q.err
+	}
+	if len(q.columns) != 1 {
+		return nil, fmt.Errorf("bun: AddColumnQuery requires exactly one column")
+	}
+
+	b = append(b, "ALTER TABLE "...)
+
+	b, err = q.appendFirstTable(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	b = append(b, " ADD "...)
+
+	b, err = q.columns[0].AppendQuery(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	return b, nil
+}
+
+//------------------------------------------------------------------------------
+
+func (q *AddColumnQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
+	queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
+	if err != nil {
+		return nil, err
+	}
+
+	query := internal.String(queryBytes)
+
+	res, err := q.exec(ctx, q, query)
+	if err != nil {
+		return nil, err
+	}
+
+	return res, nil
+}