diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt
index cb777ea..a4e08ca 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleCreator.kt
@@ -8,8 +8,9 @@ import ru.landgrafhomyak.serdha.api.v0.dml.Select
 import ru.landgrafhomyak.serdha.api.v0.dml.SelectCreator
 import ru.landgrafhomyak.serdha.api.v0.dml.Update
 import ru.landgrafhomyak.serdha.api.v0.dml.UpdateCreator
+import ru.landgrafhomyak.serdha.api.v0.runtime.Transaction
 
-public interface ModuleCreator {
+public interface ModuleCreator : Transaction {
 	public interface CreateTable<TableUserExtension : Any> {
 		public fun createTable(creator: TableCreator<TableUserExtension>): TableUserExtension
 	}
@@ -55,11 +56,17 @@ public interface ModuleCreator {
 
 	public fun <QueryUserWrapper : Any> createSelect(initializer: CreateSelect<QueryUserWrapper>): Select<QueryUserWrapper>
 
-	public interface CreateInsert<TableUserExtension : Any, QueryUserWrapper : Any> {
-		public fun createInsert(table: Table<TableUserExtension, *>, creator: InsertCreator<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
+	public interface CreateInsertParams<TableUserExtension : Any, QueryUserWrapper : Any> {
+		public fun createInsert(table: Table<TableUserExtension, *>, creator: InsertCreator.InsertParams<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
 	}
 
-	public fun <TableUserExtension : Any, QueryUserWrapper : Any> createInsert(table: Table<TableUserExtension, *>, initializer: CreateInsert<TableUserExtension, QueryUserWrapper>): Insert<QueryUserWrapper>
+	public fun <TableUserExtension : Any, QueryUserWrapper : Any> createInsertParams(table: Table<TableUserExtension, *>, initializer: CreateInsertParams<TableUserExtension, QueryUserWrapper>): Insert.InsertParams<QueryUserWrapper>
+
+	public interface CreateInsertFromQuery<TableUserExtension : Any, QueryUserWrapper : Any> {
+		public fun createInsert(table: Table<TableUserExtension, *>, creator: InsertCreator.InsertFromQuery<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
+	}
+
+	public fun <TableUserExtension : Any, QueryUserWrapper : Any> createInsertFromQuery(table: Table<TableUserExtension, *>, initializer: CreateInsertFromQuery<TableUserExtension, QueryUserWrapper>): Insert.InsertFromQuery<QueryUserWrapper>
 
 	public interface CreateUpdate<TableUserExtension : Any, QueryUserWrapper : Any> {
 		public fun createUpdate(table: Table<TableUserExtension, *>, creator: UpdateCreator<TableUserExtension, QueryUserWrapper>): QueryUserWrapper
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt
index 2751fb3..7327918 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/ModuleTemplate.kt
@@ -14,11 +14,11 @@ public interface ModuleTemplate<ModuleUserExtension : Any> {
 	}
 
 	public interface CreateModule<ModuleUserExtension : Any> {
-		public fun createModule(rootNs: Namespace, creator: ModuleCreator): ModuleUserExtension
+		public suspend fun createModule(rootNs: Namespace, creator: ModuleCreator): ModuleUserExtension
 	}
 
 	public interface UpgradeModule<OldModuleUserExtension : Any, NewModuleUserExtension : Any> {
-		public fun upgradeModule(oldModule: Module<OldModuleUserExtension>, rootNs: Namespace, updater: ModuleCreator): NewModuleUserExtension
+		public suspend fun upgradeModule(oldModule: Module<OldModuleUserExtension>, rootNs: Namespace, updater: ModuleCreator): NewModuleUserExtension
 	}
 
 	public val versionKey: String
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/TableCreator.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/TableCreator.kt
index 46f5a63..8644598 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/TableCreator.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/TableCreator.kt
@@ -1,35 +1,53 @@
 package ru.landgrafhomyak.serdha.api.v0.ddl
 
-import kotlin.jvm.JvmName
 import ru.landgrafhomyak.serdha.api.v0.Expression
+import ru.landgrafhomyak.serdha.api.v0.LowLevelApi
 
 public interface TableCreator<TableUserExtension : Any> {
 	public val expressionBuilder: Expression.Builder<TableUserExtension>
 
-	/**
-	 * Offers column of type [D][type] with `NOT NULL` constraint named [name] and runtime type [RuntimeType].
-	 *
-	 * @return Descriptor of offered column for future operations.
-	 */
-	public fun <RuntimeType : Any, DatabaseType : ColumnType<RuntimeType>> column(name: String, type: DatabaseType): Column<RuntimeType, DatabaseType, TableUserExtension>
+	public val types: ColumnType.Builder
+
+	public fun <RuntimeType, DatabaseType : ColumnType<RuntimeType>> column(name: String, type: DatabaseType): Column<RuntimeType, DatabaseType, TableUserExtension>
 
 	public fun index(name: String, vararg columns: Column<*, *, TableUserExtension>): Index<TableUserExtension>
 
-	public fun unique(name: String, distinctNulls: Boolean, vararg columns: Column<*, *, TableUserExtension>): UniqueConstraint<TableUserExtension>
-	public fun check(name: String, constraint: Expression<Boolean, ColumnType.BOOLEAN, TableUserExtension>): CheckConstraint<TableUserExtension>
+	public fun uniqueIndex(name: String, distinctNulls: Boolean, vararg columns: Column<*, *, TableUserExtension>): UniqueIndex<TableUserExtension>
+	public fun checkConstraint(name: String, constraint: Expression<Boolean, ColumnType.BOOLEAN, TableUserExtension>): CheckConstraint<TableUserExtension>
+	public fun <RuntimeType : Any, DatabaseType : ColumnType<RuntimeType>> defaultValue(c: Column<RuntimeType, DatabaseType, TableUserExtension>, expr: Expression<RuntimeType, DatabaseType, TableUserExtension>): DefaultConstraint<RuntimeType, DatabaseType, TableUserExtension>
 
-	public fun rowIdColumn(): Column<RowId<TableUserExtension>, ColumnType<RowId<TableUserExtension>>, TableUserExtension>
+	@Suppress("PropertyName")
+	public val rowId_column: Column<RowId<TableUserExtension>, ColumnType<RowId<TableUserExtension>>, TableUserExtension>
 
-	public fun rowIdUniqueConstraint(): UniqueConstraint<TableUserExtension>
+	@Suppress("PropertyName")
+	public val rowId_uniqueConstraint: UniqueIndex<TableUserExtension>
 
+	@Suppress("FunctionName")
+	@LowLevelApi
+	public fun <TargetTableUserWrapper : Any> _foreignKey(
+		fromColumns: Array<Column<*, *, TableUserExtension>>,
+		toTable: Table<TargetTableUserWrapper, *>,
+		toColumns: Array<Column<*, *, TargetTableUserWrapper>>,
+		onUpdate: ForeignKey.OnUpdateAction,
+		onDelete: ForeignKey.OnDeleteAction,
+	): ForeignKey<TableUserExtension, TargetTableUserWrapper>
+
+	@OptIn(LowLevelApi::class)
 	public fun <TargetTableUserWrapper : Any, ColumnType1 : ColumnType<*>> foreignKey(
 		fromColumn: Column<*, ColumnType1, TableUserExtension>,
 		toTable: Table<TargetTableUserWrapper, *>,
 		toColumn: Column<*, ColumnType1, TargetTableUserWrapper>,
 		onUpdate: ForeignKey.OnUpdateAction,
-		onDelete: ForeignKey.OnDeleteAction
-	): ForeignKey<TableUserExtension, TargetTableUserWrapper>
+		onDelete: ForeignKey.OnDeleteAction,
+	): ForeignKey<TableUserExtension, TargetTableUserWrapper> = this._foreignKey(
+		fromColumns = arrayOf(fromColumn),
+		toTable = toTable,
+		toColumns = arrayOf(toColumn),
+		onUpdate = onUpdate,
+		onDelete = onDelete
+	)
 
+	@OptIn(LowLevelApi::class)
 	public fun <TargetTableUserWrapper : Any, ColumnType1 : ColumnType<*>, ColumnType2 : ColumnType<*>> foreignKey(
 		fromColumn1: Column<*, ColumnType1, TableUserExtension>,
 		fromColumn2: Column<*, ColumnType2, TableUserExtension>,
@@ -37,9 +55,16 @@ public interface TableCreator<TableUserExtension : Any> {
 		toColumn1: Column<*, ColumnType1, TargetTableUserWrapper>,
 		toColumn2: Column<*, ColumnType2, TargetTableUserWrapper>,
 		onUpdate: ForeignKey.OnUpdateAction,
-		onDelete: ForeignKey.OnDeleteAction
-	): ForeignKey<TableUserExtension, TargetTableUserWrapper>
+		onDelete: ForeignKey.OnDeleteAction,
+	): ForeignKey<TableUserExtension, TargetTableUserWrapper> = this._foreignKey(
+		fromColumns = arrayOf(fromColumn1, fromColumn2),
+		toTable = toTable,
+		toColumns = arrayOf(toColumn1, toColumn2),
+		onUpdate = onUpdate,
+		onDelete = onDelete
+	)
 
+	@OptIn(LowLevelApi::class)
 	public fun <TargetTableUserWrapper : Any, ColumnType1 : ColumnType<*>, ColumnType2 : ColumnType<*>, ColumnType3 : ColumnType<*>> foreignKey(
 		fromColumn1: Column<*, ColumnType1, TableUserExtension>,
 		fromColumn2: Column<*, ColumnType2, TableUserExtension>,
@@ -49,6 +74,12 @@ public interface TableCreator<TableUserExtension : Any> {
 		toColumn2: Column<*, ColumnType2, TargetTableUserWrapper>,
 		toColumn3: Column<*, ColumnType3, TargetTableUserWrapper>,
 		onUpdate: ForeignKey.OnUpdateAction,
-		onDelete: ForeignKey.OnDeleteAction
-	): ForeignKey<TableUserExtension, TargetTableUserWrapper>
+		onDelete: ForeignKey.OnDeleteAction,
+	): ForeignKey<TableUserExtension, TargetTableUserWrapper> = this._foreignKey(
+		fromColumns = arrayOf(fromColumn1, fromColumn2, fromColumn3),
+		toTable = toTable,
+		toColumns = arrayOf(toColumn1, toColumn2, toColumn3),
+		onUpdate = onUpdate,
+		onDelete = onDelete
+	)
 }
\ No newline at end of file
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/UniqueConstraint.kt b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/UniqueIndex.kt
similarity index 74%
rename from src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/UniqueConstraint.kt
rename to src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/UniqueIndex.kt
index 25b144c..7ca3b21 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/UniqueConstraint.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/serdha/api/v0/ddl/UniqueIndex.kt
@@ -1,6 +1,6 @@
 package ru.landgrafhomyak.serdha.api.v0.ddl
 
-public interface UniqueConstraint<OwnerTableUserWrapper : Any> {
+public interface UniqueIndex<OwnerTableUserWrapper : Any> {
 	public val name: String
 	public val table: Table<OwnerTableUserWrapper, *>
 	public val columns: List<Column<*, *, OwnerTableUserWrapper>>