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authorMarvin W <git@larma.de>2017-08-26 00:05:36 +0200
committerMarvin W <git@larma.de>2017-08-27 14:52:10 +0200
commitad033beea82a4ba20da71220966b80d5f674428f (patch)
tree91d18a157b78f09ffb0c502c431a7de720d925c6 /qlite
parent8533ba645046e03378d7b9fd3048f15c05f332f7 (diff)
downloaddino-ad033beea82a4ba20da71220966b80d5f674428f.tar.gz
dino-ad033beea82a4ba20da71220966b80d5f674428f.zip
qlite: add upsert support
Diffstat (limited to 'qlite')
-rw-r--r--qlite/CMakeLists.txt5
-rw-r--r--qlite/src/database.vala7
-rw-r--r--qlite/src/table.vala5
-rw-r--r--qlite/src/upsert_builder.vala110
4 files changed, 124 insertions, 3 deletions
diff --git a/qlite/CMakeLists.txt b/qlite/CMakeLists.txt
index 199f06df..782e44ee 100644
--- a/qlite/CMakeLists.txt
+++ b/qlite/CMakeLists.txt
@@ -13,10 +13,11 @@ SOURCES
"src/row.vala"
"src/statement_builder.vala"
- "src/query_builder.vala"
+ "src/delete_builder.vala"
"src/insert_builder.vala"
+ "src/query_builder.vala"
"src/update_builder.vala"
- "src/delete_builder.vala"
+ "src/upsert_builder.vala"
PACKAGES
${QLITE_PACKAGES}
GENERATE_VAPI
diff --git a/qlite/src/database.vala b/qlite/src/database.vala
index cc46ee21..ac53d51c 100644
--- a/qlite/src/database.vala
+++ b/qlite/src/database.vala
@@ -41,6 +41,7 @@ public class Database {
}
this.tables = tables;
start_migration();
+ if (debug) db.trace((message) => print(@"Qlite trace: $message\n"));
}
public void ensure_init() throws DatabaseError {
@@ -114,6 +115,11 @@ public class Database {
return new UpdateBuilder(this, table);
}
+ public UpsertBuilder upsert(Table table) throws DatabaseError {
+ ensure_init();
+ return new UpsertBuilder(this, table);
+ }
+
public UpdateBuilder update_named(string table) throws DatabaseError {
ensure_init();
return new UpdateBuilder.for_name(this, table);
@@ -131,7 +137,6 @@ public class Database {
internal Statement prepare(string sql) throws DatabaseError {
ensure_init();
- if (debug) print(@"prepare: $sql\n");
Sqlite.Statement statement;
if (db.prepare_v2(sql, sql.length, out statement) != OK) {
throw new DatabaseError.PREPARE_ERROR(@"SQLite error: $(db.errcode()) - $(db.errmsg())");
diff --git a/qlite/src/table.vala b/qlite/src/table.vala
index 6e7e1290..82759dd1 100644
--- a/qlite/src/table.vala
+++ b/qlite/src/table.vala
@@ -68,6 +68,11 @@ public class Table {
return db.update(this);
}
+ public UpsertBuilder upsert() throws DatabaseError {
+ ensure_init();
+ return db.upsert(this);
+ }
+
public DeleteBuilder delete() throws DatabaseError {
ensure_init();
return db.delete().from(this);
diff --git a/qlite/src/upsert_builder.vala b/qlite/src/upsert_builder.vala
new file mode 100644
index 00000000..eb835027
--- /dev/null
+++ b/qlite/src/upsert_builder.vala
@@ -0,0 +1,110 @@
+using Sqlite;
+
+namespace Qlite {
+
+public class UpsertBuilder : StatementBuilder {
+ // INTO [...]
+ private Table table;
+ private string table_name;
+
+ // VALUES [...]
+ private StatementBuilder.AbstractField[] keys = {};
+ private StatementBuilder.AbstractField[] fields = {};
+
+ internal UpsertBuilder(Database db, Table table) {
+ base(db);
+ this.table = table;
+ this.table_name = table.name;
+ }
+
+ public UpsertBuilder value<T>(Column<T> column, T value, bool key = false) {
+ if (key) {
+ keys += new Field<T>(column, value);
+ } else {
+ fields += new Field<T>(column, value);
+ }
+ return this;
+ }
+
+ public UpsertBuilder value_null<T>(Column<T> column) throws DatabaseError {
+ if (column.not_null) throw new DatabaseError.ILLEGAL_QUERY(@"Can't set non-null column $(column.name) to null");
+ fields += new NullField<T>(column);
+ return this;
+ }
+
+ internal override Statement prepare() throws DatabaseError {
+ throw new DatabaseError.NOT_SUPPORTED("prepare() not available for upsert.");
+ }
+
+ internal Statement prepare_update() {
+ string update_set_list = "";
+ string update_where_list = "";
+ for (int i = 0; i < fields.length; i++) {
+ if (i != 0) {
+ update_set_list += ", ";
+ }
+ update_set_list += @"$(((!)fields[i].column).name) = ?";
+ }
+ for (int i = 0; i < keys.length; i++) {
+ if (i != 0) {
+ update_where_list += " AND ";
+ }
+ update_where_list += @"$(((!)keys[i].column).name) = ?";
+ }
+
+ string sql = @"UPDATE $table_name SET $update_set_list WHERE $update_where_list";
+
+ Statement stmt = db.prepare(sql);
+ for (int i = 0; i < fields.length; i++) {
+ fields[i].bind(stmt, i + 1);
+ }
+ for (int i = 0; i < keys.length; i++) {
+ keys[i].bind(stmt, i + fields.length + 1);
+ }
+
+ return stmt;
+ }
+
+ internal Statement prepare_insert() {
+ string insert_field_list = "";
+ string insert_value_qs = "";
+ for (int i = 0; i < fields.length; i++) {
+ if (i != 0) {
+ insert_value_qs += ", ";
+ insert_field_list += ", ";
+ }
+ insert_field_list += ((!)fields[i].column).name;
+ insert_value_qs += "?";
+ }
+ for (int i = 0; i < keys.length; i++) {
+ if (i != 0 || fields.length > 0) {
+ insert_value_qs += ", ";
+ insert_field_list += ", ";
+ }
+ insert_field_list += ((!)keys[i].column).name;
+ insert_value_qs += "?";
+ }
+
+ string sql = @"INSERT OR IGNORE INTO $table_name ($insert_field_list) VALUES ($insert_value_qs)";
+
+ Statement stmt = db.prepare(sql);
+ for (int i = 0; i < fields.length; i++) {
+ fields[i].bind(stmt, i + 1);
+ }
+ for (int i = 0; i < keys.length; i++) {
+ keys[i].bind(stmt, i + fields.length + 1);
+ }
+
+ return stmt;
+ }
+
+ public int64 perform() throws DatabaseError {
+ if (prepare_update().step() != DONE || prepare_insert().step() != DONE) {
+ throw new DatabaseError.EXEC_ERROR(@"SQLite error: $(db.errcode()) - $(db.errmsg())");
+ }
+ return db.last_insert_rowid();
+ }
+
+}
+
+} \ No newline at end of file