vendor: Update vendored sources to duckdb/duckdb@81b4ef6

Fix handling of quotes in ToString() of search_path in current_setting (duckdb/duckdb#19162)
[ci] Change logic for saving caches: Github variable that decides what gets cached (duckdb/duckdb#19150)
Allow implicit casts from `JSON[]` to `JSON` again (duckdb/duckdb#19141)
Fix bug in merge into when condition is in parenthesis (duckdb/duckdb#19137)

Author: krlmlr

R/version.R

@@ -1,7 +1,7 @@
 # Generated by rconfigure.py, do not edit by hand
 # DuckDB version information
 
-duckdb_version <- "1.4.1-dev82"
+duckdb_version <- "1.4.1-dev91"
 
 # Function to get DuckDB version without establishing a connection
 get_duckdb_version <- function() {

src/duckdb/src/catalog/catalog_search_path.cpp

@@ -24,8 +24,8 @@ string CatalogSearchEntry::ToString() const {
 
 string CatalogSearchEntry::WriteOptionallyQuoted(const string &input) {
 	for (idx_t i = 0; i < input.size(); i++) {
-		if (input[i] == '.' || input[i] == ',') {
-			return "\"" + input + "\"";
+		if (input[i] == '.' || input[i] == ',' || input[i] == '"') {
+			return "\"" + StringUtil::Replace(input, "\"", "\"\"") + "\"";
 		}
 	}
 	return input;

src/duckdb/src/function/table/version/pragma_version.cpp

@@ -1,5 +1,5 @@
 #ifndef DUCKDB_PATCH_VERSION
-#define DUCKDB_PATCH_VERSION "1-dev82"
+#define DUCKDB_PATCH_VERSION "1-dev91"
 #endif
 #ifndef DUCKDB_MINOR_VERSION
 #define DUCKDB_MINOR_VERSION 4
@@ -8,10 +8,10 @@
 #define DUCKDB_MAJOR_VERSION 1
 #endif
 #ifndef DUCKDB_VERSION
-#define DUCKDB_VERSION "v1.4.1-dev82"
+#define DUCKDB_VERSION "v1.4.1-dev91"
 #endif
 #ifndef DUCKDB_SOURCE_ID
-#define DUCKDB_SOURCE_ID "922691fc7f"
+#define DUCKDB_SOURCE_ID "81b4ef640b"
 #endif
 #include "duckdb/function/table/system_functions.hpp"
 #include "duckdb/main/database.hpp"

src/duckdb/src/planner/binder/statement/bind_merge_into.cpp

@@ -232,10 +232,18 @@ BoundStatement Binder::Bind(MergeIntoStatement &stmt) {
 	auto bound_join_node = Bind(join);
 
 	auto root = CreatePlan(*bound_join_node);
+	auto join_ref = reference<LogicalOperator>(*root);
+	while (join_ref.get().children.size() == 1) {
+		join_ref = *join_ref.get().children[0];
+	}
+	if (join_ref.get().children.size() != 2) {
+		throw NotImplementedException("Expected a join after binding a join operator - but got a %s",
+		                              join_ref.get().type);
+	}
 	// kind of hacky, CreatePlan turns a RIGHT join into a LEFT join so the children get reversed from what we need
 	bool inverted = join.type == JoinType::RIGHT;
-	auto &source = root->children[inverted ? 1 : 0];
-	auto &get = root->children[inverted ? 0 : 1]->Cast<LogicalGet>();
+	auto &source = join_ref.get().children[inverted ? 1 : 0];
+	auto &get = join_ref.get().children[inverted ? 0 : 1]->Cast<LogicalGet>();
 
 	auto merge_into = make_uniq<LogicalMergeInto>(table);
 	merge_into->table_index = GenerateTableIndex();