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Postgres ignore + replace #298

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merged 5 commits into from
May 9, 2018
Merged

Postgres ignore + replace #298

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d758686
Add replace and ignore
AllanWang May 3, 2018
e4c0ee5
Test insert ignore
AllanWang May 3, 2018
9eaac76
fix insert and add back replace
AllanWang May 3, 2018
733b49c
Pg replace (#2)
AllanWang May 5, 2018
02a7895
Merge master
AllanWang May 8, 2018
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27 changes: 27 additions & 0 deletions src/main/kotlin/org/jetbrains/exposed/sql/vendors/PostgreSQL.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,33 @@ internal object PostgreSQLFunctionProvider : FunctionProvider() {
if (limit != null) transaction.throwUnsupportedException("PostgreSQL doesn't support LIMIT in UPDATE clause.")
return super.update(targets, columnsAndValues, limit, where, transaction)
}

override fun replace(table: Table, data: List<Pair<Column<*>, Any?>>, transaction: Transaction): String {

val builder = QueryBuilder(true)
val sql = if (data.isEmpty()) ""
else data.joinToString(prefix = "VALUES (", postfix = ")") { (col, value) ->
builder.registerArgument(col, value)
}

val columns = data.map { it.first }

val def = super.insert(false, table, columns, sql, transaction)

val uniqueCols = columns.filter { it.indexInPK != null }.sortedBy { it.indexInPK }
if (uniqueCols.isEmpty())
transaction.throwUnsupportedException("Postgres replace table must supply at least one primary key")
val conflictKey = uniqueCols.joinToString { transaction.identity(it) }
return def + "ON CONFLICT ($conflictKey) DO UPDATE SET " + columns.joinToString { "${transaction.identity(it)}=EXCLUDED.${transaction.identity(it)}" }
}

override fun insert(ignore: Boolean, table: Table, columns: List<Column<*>>, expr: String, transaction: Transaction): String {
val def = super.insert(false, table, columns, expr, transaction)
return if (ignore) "$def $onConflictIgnore" else def
}

private const val onConflictIgnore = "ON CONFLICT DO NOTHING"

}

internal class PostgreSQLDialect : VendorDialect(dialectName, PostgreSQLDataTypeProvider, PostgreSQLFunctionProvider) {
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