From 293e2a52e0b45065db12ff27f89f1adebe4bf4d2 Mon Sep 17 00:00:00 2001 From: Stefan Majewsky Date: Fri, 10 Apr 2026 20:13:15 +0200 Subject: reorganize code --- internal/dialect.go | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 internal/dialect.go (limited to 'internal/dialect.go') diff --git a/internal/dialect.go b/internal/dialect.go new file mode 100644 index 0000000..0cf90a2 --- /dev/null +++ b/internal/dialect.go @@ -0,0 +1,41 @@ +// SPDX-FileCopyrightText: 2026 Stefan Majewsky +// SPDX-License-Identifier: Apache-2.0 + +package internal + +import ( + "strconv" + "strings" +) + +// Dialect is a copy of the interface of the same name in package oblast. +// We cannot refer to that interface within this package because that would constitute a cyclic dependency. +type Dialect interface { + Placeholder(i int) string + QuoteIdentifier(name string) string + UsesLastInsertID() bool + InsertSuffixForAutoColumns(columns []string) string +} + +// PostgresDialect is the dialect of PostgreSQL databases. +type PostgresDialect struct{} + +func (PostgresDialect) Placeholder(i int) string { return "$" + strconv.Itoa(i) } +func (PostgresDialect) QuoteIdentifier(name string) string { return `"` + name + `"` } +func (PostgresDialect) UsesLastInsertID() bool { return false } + +func (p PostgresDialect) InsertSuffixForAutoColumns(columns []string) string { + quotedColumns := make([]string, len(columns)) + for idx, name := range columns { + quotedColumns[idx] = p.QuoteIdentifier(name) + } + return ` RETURNING ` + strings.Join(quotedColumns, ", ") +} + +// SqliteDialect is the dialect of SQLite databases. +type SqliteDialect struct{} + +func (SqliteDialect) Placeholder(_ int) string { return "?" } +func (SqliteDialect) QuoteIdentifier(name string) string { return `"` + name + `"` } +func (SqliteDialect) UsesLastInsertID() bool { return true } +func (SqliteDialect) InsertSuffixForAutoColumns(columns []string) string { return "" } -- cgit v1.2.3