diff --git a/Cargo.lock b/Cargo.lock
index bc0f0862d7..769120fc2b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -50,7 +50,6 @@ checksum = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
 name = "assists"
 version = "0.0.0"
 dependencies = [
- "base_db",
  "either",
  "hir",
  "ide_db",
@@ -627,7 +626,6 @@ name = "ide"
 version = "0.0.0"
 dependencies = [
  "assists",
- "base_db",
  "cfg",
  "completion",
  "either",
@@ -1315,7 +1313,6 @@ name = "rust-analyzer"
 version = "0.0.0"
 dependencies = [
  "anyhow",
- "base_db",
  "cfg",
  "crossbeam-channel 0.5.0",
  "env_logger",
@@ -1548,7 +1545,6 @@ dependencies = [
 name = "ssr"
 version = "0.0.0"
 dependencies = [
- "base_db",
  "expect-test",
  "hir",
  "ide_db",
diff --git a/crates/assists/Cargo.toml b/crates/assists/Cargo.toml
index 2641256518..108f656e92 100644
--- a/crates/assists/Cargo.toml
+++ b/crates/assists/Cargo.toml
@@ -18,7 +18,6 @@ stdx = { path = "../stdx", version = "0.0.0" }
 syntax = { path = "../syntax", version = "0.0.0" }
 text_edit = { path = "../text_edit", version = "0.0.0" }
 profile = { path = "../profile", version = "0.0.0" }
-base_db = { path = "../base_db", version = "0.0.0" }
 ide_db = { path = "../ide_db", version = "0.0.0" }
 hir = { path = "../hir", version = "0.0.0" }
 test_utils = { path = "../test_utils", version = "0.0.0" }
diff --git a/crates/assists/src/assist_context.rs b/crates/assists/src/assist_context.rs
index bf520069e8..d11fee196a 100644
--- a/crates/assists/src/assist_context.rs
+++ b/crates/assists/src/assist_context.rs
@@ -3,8 +3,8 @@
 use std::mem;
 
 use algo::find_covering_element;
-use base_db::{FileId, FileRange};
 use hir::Semantics;
+use ide_db::base_db::{FileId, FileRange};
 use ide_db::{
     label::Label,
     source_change::{SourceChange, SourceFileEdit},
diff --git a/crates/assists/src/handlers/extract_struct_from_enum_variant.rs b/crates/assists/src/handlers/extract_struct_from_enum_variant.rs
index 7f4f80b237..48433feb9e 100644
--- a/crates/assists/src/handlers/extract_struct_from_enum_variant.rs
+++ b/crates/assists/src/handlers/extract_struct_from_enum_variant.rs
@@ -1,5 +1,5 @@
-use base_db::FileId;
 use hir::{EnumVariant, Module, ModuleDef, Name};
+use ide_db::base_db::FileId;
 use ide_db::{defs::Definition, search::Reference, RootDatabase};
 use itertools::Itertools;
 use rustc_hash::FxHashSet;
diff --git a/crates/assists/src/handlers/fix_visibility.rs b/crates/assists/src/handlers/fix_visibility.rs
index 66f74150c8..c867207877 100644
--- a/crates/assists/src/handlers/fix_visibility.rs
+++ b/crates/assists/src/handlers/fix_visibility.rs
@@ -1,5 +1,5 @@
-use base_db::FileId;
 use hir::{db::HirDatabase, HasSource, HasVisibility, PathResolution};
+use ide_db::base_db::FileId;
 use syntax::{
     ast::{self, VisibilityOwner},
     AstNode, TextRange, TextSize,
diff --git a/crates/assists/src/handlers/generate_function.rs b/crates/assists/src/handlers/generate_function.rs
index d23f4293b3..758188a429 100644
--- a/crates/assists/src/handlers/generate_function.rs
+++ b/crates/assists/src/handlers/generate_function.rs
@@ -1,5 +1,5 @@
-use base_db::FileId;
 use hir::HirDisplay;
+use ide_db::base_db::FileId;
 use rustc_hash::{FxHashMap, FxHashSet};
 use syntax::{
     ast::{
diff --git a/crates/assists/src/lib.rs b/crates/assists/src/lib.rs
index 8a664f6542..70a651e10f 100644
--- a/crates/assists/src/lib.rs
+++ b/crates/assists/src/lib.rs
@@ -17,8 +17,8 @@ mod tests;
 pub mod utils;
 pub mod ast_transform;
 
-use base_db::FileRange;
 use hir::Semantics;
+use ide_db::base_db::FileRange;
 use ide_db::{label::Label, source_change::SourceChange, RootDatabase};
 use syntax::TextRange;
 
diff --git a/crates/assists/src/tests.rs b/crates/assists/src/tests.rs
index 2b687decf3..849d85e763 100644
--- a/crates/assists/src/tests.rs
+++ b/crates/assists/src/tests.rs
@@ -1,7 +1,7 @@
 mod generated;
 
-use base_db::{fixture::WithFixture, FileId, FileRange, SourceDatabaseExt};
 use hir::Semantics;
+use ide_db::base_db::{fixture::WithFixture, FileId, FileRange, SourceDatabaseExt};
 use ide_db::RootDatabase;
 use syntax::TextRange;
 use test_utils::{assert_eq_text, extract_offset, extract_range};
diff --git a/crates/completion/src/complete_mod.rs b/crates/completion/src/complete_mod.rs
index 35a57aba34..385911afad 100644
--- a/crates/completion/src/complete_mod.rs
+++ b/crates/completion/src/complete_mod.rs
@@ -1,7 +1,7 @@
 //! Completes mod declarations.
 
-use base_db::{SourceDatabaseExt, VfsPath};
 use hir::{Module, ModuleSource};
+use ide_db::base_db::{SourceDatabaseExt, VfsPath};
 use ide_db::RootDatabase;
 use rustc_hash::FxHashSet;
 
diff --git a/crates/completion/src/completion_context.rs b/crates/completion/src/completion_context.rs
index 97c5c04ba5..dca304a8f5 100644
--- a/crates/completion/src/completion_context.rs
+++ b/crates/completion/src/completion_context.rs
@@ -1,7 +1,7 @@
 //! See `CompletionContext` structure.
 
-use base_db::{FilePosition, SourceDatabase};
 use hir::{Local, ScopeDef, Semantics, SemanticsScope, Type};
+use ide_db::base_db::{FilePosition, SourceDatabase};
 use ide_db::{call_info::ActiveParameter, RootDatabase};
 use syntax::{
     algo::{find_covering_element, find_node_at_offset},
diff --git a/crates/completion/src/lib.rs b/crates/completion/src/lib.rs
index 0a60ea7f28..b72fd249dc 100644
--- a/crates/completion/src/lib.rs
+++ b/crates/completion/src/lib.rs
@@ -23,7 +23,7 @@ mod complete_macro_in_item_position;
 mod complete_trait_impl;
 mod complete_mod;
 
-use base_db::FilePosition;
+use ide_db::base_db::FilePosition;
 use ide_db::RootDatabase;
 
 use crate::{
diff --git a/crates/completion/src/test_utils.rs b/crates/completion/src/test_utils.rs
index f2cf2561f3..b02556797d 100644
--- a/crates/completion/src/test_utils.rs
+++ b/crates/completion/src/test_utils.rs
@@ -1,7 +1,7 @@
 //! Runs completion for testing purposes.
 
-use base_db::{fixture::ChangeFixture, FileLoader, FilePosition};
 use hir::Semantics;
+use ide_db::base_db::{fixture::ChangeFixture, FileLoader, FilePosition};
 use ide_db::RootDatabase;
 use itertools::Itertools;
 use stdx::{format_to, trim_indent};
diff --git a/crates/ide/Cargo.toml b/crates/ide/Cargo.toml
index 145c6156cc..4d483580df 100644
--- a/crates/ide/Cargo.toml
+++ b/crates/ide/Cargo.toml
@@ -23,7 +23,6 @@ url = "2.1.1"
 stdx = { path = "../stdx", version = "0.0.0" }
 syntax = { path = "../syntax", version = "0.0.0" }
 text_edit = { path = "../text_edit", version = "0.0.0" }
-base_db = { path = "../base_db", version = "0.0.0" }
 ide_db = { path = "../ide_db", version = "0.0.0" }
 cfg = { path = "../cfg", version = "0.0.0" }
 profile = { path = "../profile", version = "0.0.0" }
diff --git a/crates/ide/src/call_hierarchy.rs b/crates/ide/src/call_hierarchy.rs
index a259d98496..8ad50a2ee5 100644
--- a/crates/ide/src/call_hierarchy.rs
+++ b/crates/ide/src/call_hierarchy.rs
@@ -137,7 +137,7 @@ impl CallLocations {
 
 #[cfg(test)]
 mod tests {
-    use base_db::FilePosition;
+    use ide_db::base_db::FilePosition;
 
     use crate::fixture;
 
diff --git a/crates/ide/src/diagnostics.rs b/crates/ide/src/diagnostics.rs
index 232074c3df..d0ee588589 100644
--- a/crates/ide/src/diagnostics.rs
+++ b/crates/ide/src/diagnostics.rs
@@ -9,11 +9,11 @@ mod field_shorthand;
 
 use std::cell::RefCell;
 
-use base_db::SourceDatabase;
 use hir::{
     diagnostics::{Diagnostic as _, DiagnosticSinkBuilder},
     Semantics,
 };
+use ide_db::base_db::SourceDatabase;
 use ide_db::RootDatabase;
 use itertools::Itertools;
 use rustc_hash::FxHashSet;
diff --git a/crates/ide/src/diagnostics/field_shorthand.rs b/crates/ide/src/diagnostics/field_shorthand.rs
index 54e9fce9e5..f41bcd6191 100644
--- a/crates/ide/src/diagnostics/field_shorthand.rs
+++ b/crates/ide/src/diagnostics/field_shorthand.rs
@@ -1,7 +1,7 @@
 //! Suggests shortening `Foo { field: field }` to `Foo { field }` in both
 //! expressions and patterns.
 
-use base_db::FileId;
+use ide_db::base_db::FileId;
 use ide_db::source_change::SourceFileEdit;
 use syntax::{ast, match_ast, AstNode, SyntaxNode};
 use text_edit::TextEdit;
diff --git a/crates/ide/src/diagnostics/fixes.rs b/crates/ide/src/diagnostics/fixes.rs
index 0c75e50b01..0c950003e1 100644
--- a/crates/ide/src/diagnostics/fixes.rs
+++ b/crates/ide/src/diagnostics/fixes.rs
@@ -1,6 +1,5 @@
 //! Provides a way to attach fixes to the diagnostics.
 //! The same module also has all curret custom fixes for the diagnostics implemented.
-use base_db::FileId;
 use hir::{
     db::AstDatabase,
     diagnostics::{
@@ -9,6 +8,7 @@ use hir::{
     },
     HasSource, HirDisplay, Semantics, VariantDef,
 };
+use ide_db::base_db::FileId;
 use ide_db::{
     source_change::{FileSystemEdit, SourceFileEdit},
     RootDatabase,
diff --git a/crates/ide/src/display/navigation_target.rs b/crates/ide/src/display/navigation_target.rs
index cf9d617dc0..0c429a2629 100644
--- a/crates/ide/src/display/navigation_target.rs
+++ b/crates/ide/src/display/navigation_target.rs
@@ -1,8 +1,8 @@
 //! FIXME: write short doc here
 
-use base_db::{FileId, SourceDatabase};
 use either::Either;
 use hir::{original_range, AssocItem, FieldSource, HasSource, InFile, ModuleSource};
+use ide_db::base_db::{FileId, SourceDatabase};
 use ide_db::{defs::Definition, RootDatabase};
 use syntax::{
     ast::{self, DocCommentsOwner, NameOwner},
diff --git a/crates/ide/src/fixture.rs b/crates/ide/src/fixture.rs
index ed06689f0c..eb57f9224d 100644
--- a/crates/ide/src/fixture.rs
+++ b/crates/ide/src/fixture.rs
@@ -1,5 +1,5 @@
 //! Utilities for creating `Analysis` instances for tests.
-use base_db::fixture::ChangeFixture;
+use ide_db::base_db::fixture::ChangeFixture;
 use test_utils::{extract_annotations, RangeOrOffset};
 
 use crate::{Analysis, AnalysisHost, FileId, FilePosition, FileRange};
diff --git a/crates/ide/src/goto_definition.rs b/crates/ide/src/goto_definition.rs
index a87e31019d..15792f9472 100644
--- a/crates/ide/src/goto_definition.rs
+++ b/crates/ide/src/goto_definition.rs
@@ -100,7 +100,7 @@ pub(crate) fn reference_definition(
 
 #[cfg(test)]
 mod tests {
-    use base_db::FileRange;
+    use ide_db::base_db::FileRange;
     use syntax::{TextRange, TextSize};
 
     use crate::fixture;
diff --git a/crates/ide/src/goto_implementation.rs b/crates/ide/src/goto_implementation.rs
index 6c586bbd12..529004878d 100644
--- a/crates/ide/src/goto_implementation.rs
+++ b/crates/ide/src/goto_implementation.rs
@@ -74,7 +74,7 @@ fn impls_for_trait(
 
 #[cfg(test)]
 mod tests {
-    use base_db::FileRange;
+    use ide_db::base_db::FileRange;
 
     use crate::fixture;
 
diff --git a/crates/ide/src/goto_type_definition.rs b/crates/ide/src/goto_type_definition.rs
index 6d0df04dd0..aba6bf5dc2 100644
--- a/crates/ide/src/goto_type_definition.rs
+++ b/crates/ide/src/goto_type_definition.rs
@@ -54,7 +54,7 @@ fn pick_best(tokens: TokenAtOffset<SyntaxToken>) -> Option<SyntaxToken> {
 
 #[cfg(test)]
 mod tests {
-    use base_db::FileRange;
+    use ide_db::base_db::FileRange;
 
     use crate::fixture;
 
diff --git a/crates/ide/src/hover.rs b/crates/ide/src/hover.rs
index 0332c7be04..94d895c5e7 100644
--- a/crates/ide/src/hover.rs
+++ b/crates/ide/src/hover.rs
@@ -1,8 +1,8 @@
-use base_db::SourceDatabase;
 use hir::{
     Adt, AsAssocItem, AssocItemContainer, Documentation, FieldSource, HasSource, HirDisplay,
     Module, ModuleDef, ModuleSource, Semantics,
 };
+use ide_db::base_db::SourceDatabase;
 use ide_db::{
     defs::{Definition, NameClass, NameRefClass},
     RootDatabase,
@@ -385,8 +385,8 @@ fn pick_best(tokens: TokenAtOffset<SyntaxToken>) -> Option<SyntaxToken> {
 
 #[cfg(test)]
 mod tests {
-    use base_db::FileLoader;
     use expect_test::{expect, Expect};
+    use ide_db::base_db::FileLoader;
 
     use crate::fixture;
 
diff --git a/crates/ide/src/lib.rs b/crates/ide/src/lib.rs
index d84b970d46..4bc733b70e 100644
--- a/crates/ide/src/lib.rs
+++ b/crates/ide/src/lib.rs
@@ -48,11 +48,11 @@ mod doc_links;
 
 use std::sync::Arc;
 
-use base_db::{
+use cfg::CfgOptions;
+use ide_db::base_db::{
     salsa::{self, ParallelDatabase},
     CheckCanceled, Env, FileLoader, FileSet, SourceDatabase, VfsPath,
 };
-use cfg::CfgOptions;
 use ide_db::{
     symbol_index::{self, FileSymbol},
     LineIndexDatabase,
@@ -88,11 +88,11 @@ pub use ide_db::call_info::CallInfo;
 pub use assists::{
     utils::MergeBehaviour, Assist, AssistConfig, AssistId, AssistKind, ResolvedAssist,
 };
-pub use base_db::{
+pub use hir::{Documentation, Semantics};
+pub use ide_db::base_db::{
     Canceled, Change, CrateGraph, CrateId, Edition, FileId, FilePosition, FileRange, SourceRoot,
     SourceRootId,
 };
-pub use hir::{Documentation, Semantics};
 pub use ide_db::{
     label::Label,
     line_index::{LineCol, LineIndex},
diff --git a/crates/ide/src/parent_module.rs b/crates/ide/src/parent_module.rs
index ef94acfecd..6cc3b2991c 100644
--- a/crates/ide/src/parent_module.rs
+++ b/crates/ide/src/parent_module.rs
@@ -1,5 +1,5 @@
-use base_db::{CrateId, FileId, FilePosition};
 use hir::Semantics;
+use ide_db::base_db::{CrateId, FileId, FilePosition};
 use ide_db::RootDatabase;
 use syntax::{
     algo::find_node_at_offset,
diff --git a/crates/ide/src/prime_caches.rs b/crates/ide/src/prime_caches.rs
index 6944dbcd2a..ea0acfaa02 100644
--- a/crates/ide/src/prime_caches.rs
+++ b/crates/ide/src/prime_caches.rs
@@ -3,8 +3,8 @@
 //! request takes longer to compute. This modules implemented prepopulating of
 //! various caches, it's not really advanced at the moment.
 
-use base_db::SourceDatabase;
 use hir::db::DefDatabase;
+use ide_db::base_db::SourceDatabase;
 
 use crate::RootDatabase;
 
diff --git a/crates/ide/src/references.rs b/crates/ide/src/references.rs
index 67ec257a8e..a517081d52 100644
--- a/crates/ide/src/references.rs
+++ b/crates/ide/src/references.rs
@@ -191,8 +191,8 @@ fn get_struct_def_name_for_struct_literal_search(
 
 #[cfg(test)]
 mod tests {
-    use base_db::FileId;
     use expect_test::{expect, Expect};
+    use ide_db::base_db::FileId;
     use stdx::format_to;
 
     use crate::{fixture, SearchScope};
diff --git a/crates/ide/src/references/rename.rs b/crates/ide/src/references/rename.rs
index 35aafc49d7..26ac2371a5 100644
--- a/crates/ide/src/references/rename.rs
+++ b/crates/ide/src/references/rename.rs
@@ -1,7 +1,7 @@
 //! FIXME: write short doc here
 
-use base_db::SourceDatabaseExt;
 use hir::{Module, ModuleDef, ModuleSource, Semantics};
+use ide_db::base_db::SourceDatabaseExt;
 use ide_db::{
     defs::{Definition, NameClass, NameRefClass},
     RootDatabase,
diff --git a/crates/ide/src/status.rs b/crates/ide/src/status.rs
index 0af84daa0a..8e91c99d72 100644
--- a/crates/ide/src/status.rs
+++ b/crates/ide/src/status.rs
@@ -1,10 +1,10 @@
 use std::{fmt, iter::FromIterator, sync::Arc};
 
-use base_db::{
+use hir::MacroFile;
+use ide_db::base_db::{
     salsa::debug::{DebugQueryTable, TableEntry},
     CrateId, FileId, FileTextQuery, SourceDatabase, SourceRootId,
 };
-use hir::MacroFile;
 use ide_db::{
     symbol_index::{LibrarySymbolsQuery, SymbolIndex},
     RootDatabase,
@@ -16,7 +16,7 @@ use stdx::format_to;
 use syntax::{ast, Parse, SyntaxNode};
 
 fn syntax_tree_stats(db: &RootDatabase) -> SyntaxTreeStats {
-    base_db::ParseQuery.in_db(db).entries::<SyntaxTreeStats>()
+    ide_db::base_db::ParseQuery.in_db(db).entries::<SyntaxTreeStats>()
 }
 fn macro_syntax_tree_stats(db: &RootDatabase) -> SyntaxTreeStats {
     hir::db::ParseMacroQuery.in_db(db).entries::<SyntaxTreeStats>()
diff --git a/crates/ide/src/syntax_highlighting/html.rs b/crates/ide/src/syntax_highlighting/html.rs
index 57e2d29231..abcc5cccc7 100644
--- a/crates/ide/src/syntax_highlighting/html.rs
+++ b/crates/ide/src/syntax_highlighting/html.rs
@@ -1,6 +1,6 @@
 //! Renders a bit of code as HTML.
 
-use base_db::SourceDatabase;
+use ide_db::base_db::SourceDatabase;
 use oorandom::Rand32;
 use stdx::format_to;
 use syntax::{AstNode, TextRange, TextSize};
diff --git a/crates/ide/src/syntax_tree.rs b/crates/ide/src/syntax_tree.rs
index 0eed2dbd78..7941610d6b 100644
--- a/crates/ide/src/syntax_tree.rs
+++ b/crates/ide/src/syntax_tree.rs
@@ -1,4 +1,4 @@
-use base_db::{FileId, SourceDatabase};
+use ide_db::base_db::{FileId, SourceDatabase};
 use ide_db::RootDatabase;
 use syntax::{
     algo, AstNode, NodeOrToken, SourceFile,
diff --git a/crates/ide/src/typing.rs b/crates/ide/src/typing.rs
index 94b91f0499..43458a3a2c 100644
--- a/crates/ide/src/typing.rs
+++ b/crates/ide/src/typing.rs
@@ -15,7 +15,7 @@
 
 mod on_enter;
 
-use base_db::{FilePosition, SourceDatabase};
+use ide_db::base_db::{FilePosition, SourceDatabase};
 use ide_db::{source_change::SourceFileEdit, RootDatabase};
 use syntax::{
     algo::find_node_at_offset,
diff --git a/crates/ide/src/typing/on_enter.rs b/crates/ide/src/typing/on_enter.rs
index 98adef1d6f..f4ea303526 100644
--- a/crates/ide/src/typing/on_enter.rs
+++ b/crates/ide/src/typing/on_enter.rs
@@ -1,7 +1,7 @@
 //! Handles the `Enter` key press. At the momently, this only continues
 //! comments, but should handle indent some time in the future as well.
 
-use base_db::{FilePosition, SourceDatabase};
+use ide_db::base_db::{FilePosition, SourceDatabase};
 use ide_db::RootDatabase;
 use syntax::{
     ast::{self, AstToken},
diff --git a/crates/ide_db/src/lib.rs b/crates/ide_db/src/lib.rs
index 303f7c964b..38ebdbf791 100644
--- a/crates/ide_db/src/lib.rs
+++ b/crates/ide_db/src/lib.rs
@@ -26,6 +26,9 @@ use rustc_hash::FxHashSet;
 
 use crate::{line_index::LineIndex, symbol_index::SymbolsDatabase};
 
+/// `base_db` is normally also needed in places where `ide_db` is used, so this re-export is for convenience.
+pub use base_db;
+
 #[salsa::database(
     base_db::SourceDatabaseStorage,
     base_db::SourceDatabaseExtStorage,
diff --git a/crates/rust-analyzer/Cargo.toml b/crates/rust-analyzer/Cargo.toml
index 66cf06e1a8..f8f97b1d37 100644
--- a/crates/rust-analyzer/Cargo.toml
+++ b/crates/rust-analyzer/Cargo.toml
@@ -46,7 +46,6 @@ cfg = { path = "../cfg", version = "0.0.0" }
 toolchain = { path = "../toolchain", version = "0.0.0" }
 
 # This should only be used in CLI
-base_db = { path = "../base_db", version = "0.0.0" }
 ide_db = { path = "../ide_db", version = "0.0.0" }
 ssr = { path = "../ssr", version = "0.0.0" }
 hir = { path = "../hir", version = "0.0.0" }
diff --git a/crates/rust-analyzer/src/cli/analysis_bench.rs b/crates/rust-analyzer/src/cli/analysis_bench.rs
index d1c095ba5c..8e33986d52 100644
--- a/crates/rust-analyzer/src/cli/analysis_bench.rs
+++ b/crates/rust-analyzer/src/cli/analysis_bench.rs
@@ -3,13 +3,13 @@
 use std::{env, path::PathBuf, str::FromStr, sync::Arc, time::Instant};
 
 use anyhow::{bail, format_err, Result};
-use base_db::{
-    salsa::{Database, Durability},
-    FileId,
-};
 use ide::{
     Analysis, AnalysisHost, Change, CompletionConfig, DiagnosticsConfig, FilePosition, LineCol,
 };
+use ide_db::base_db::{
+    salsa::{Database, Durability},
+    FileId,
+};
 use vfs::AbsPathBuf;
 
 use crate::{
diff --git a/crates/rust-analyzer/src/cli/analysis_stats.rs b/crates/rust-analyzer/src/cli/analysis_stats.rs
index fb2b2b0001..98ef0cd68a 100644
--- a/crates/rust-analyzer/src/cli/analysis_stats.rs
+++ b/crates/rust-analyzer/src/cli/analysis_stats.rs
@@ -6,16 +6,16 @@ use std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 
-use base_db::{
-    salsa::{self, ParallelDatabase},
-    SourceDatabaseExt,
-};
 use hir::{
     db::{AstDatabase, DefDatabase, HirDatabase},
     original_range, AssocItem, Crate, HasSource, HirDisplay, ModuleDef,
 };
 use hir_def::FunctionId;
 use hir_ty::{Ty, TypeWalk};
+use ide_db::base_db::{
+    salsa::{self, ParallelDatabase},
+    SourceDatabaseExt,
+};
 use itertools::Itertools;
 use oorandom::Rand32;
 use rayon::prelude::*;
diff --git a/crates/rust-analyzer/src/cli/diagnostics.rs b/crates/rust-analyzer/src/cli/diagnostics.rs
index a89993a2b2..368f627ac4 100644
--- a/crates/rust-analyzer/src/cli/diagnostics.rs
+++ b/crates/rust-analyzer/src/cli/diagnostics.rs
@@ -6,9 +6,9 @@ use std::path::Path;
 use anyhow::anyhow;
 use rustc_hash::FxHashSet;
 
-use base_db::SourceDatabaseExt;
 use hir::Crate;
 use ide::{DiagnosticsConfig, Severity};
+use ide_db::base_db::SourceDatabaseExt;
 
 use crate::cli::{load_cargo::load_cargo, Result};
 
diff --git a/crates/rust-analyzer/src/cli/load_cargo.rs b/crates/rust-analyzer/src/cli/load_cargo.rs
index 7ae1c90552..ab1e2ab92d 100644
--- a/crates/rust-analyzer/src/cli/load_cargo.rs
+++ b/crates/rust-analyzer/src/cli/load_cargo.rs
@@ -3,9 +3,9 @@
 use std::{path::Path, sync::Arc};
 
 use anyhow::Result;
-use base_db::CrateGraph;
 use crossbeam_channel::{unbounded, Receiver};
 use ide::{AnalysisHost, Change};
+use ide_db::base_db::CrateGraph;
 use project_model::{CargoConfig, ProcMacroClient, ProjectManifest, ProjectWorkspace};
 use vfs::{loader::Handle, AbsPath, AbsPathBuf};
 
diff --git a/crates/rust-analyzer/src/cli/ssr.rs b/crates/rust-analyzer/src/cli/ssr.rs
index c11e109437..a06631daca 100644
--- a/crates/rust-analyzer/src/cli/ssr.rs
+++ b/crates/rust-analyzer/src/cli/ssr.rs
@@ -4,7 +4,7 @@ use crate::cli::{load_cargo::load_cargo, Result};
 use ssr::{MatchFinder, SsrPattern, SsrRule};
 
 pub fn apply_ssr_rules(rules: Vec<SsrRule>) -> Result<()> {
-    use base_db::SourceDatabaseExt;
+    use ide_db::base_db::SourceDatabaseExt;
     let (host, vfs) = load_cargo(&std::env::current_dir()?, true, true)?;
     let db = host.raw_database();
     let mut match_finder = MatchFinder::at_first_file(db)?;
@@ -26,7 +26,7 @@ pub fn apply_ssr_rules(rules: Vec<SsrRule>) -> Result<()> {
 /// `debug_snippet`. This is intended for debugging and probably isn't in it's current form useful
 /// for much else.
 pub fn search_for_patterns(patterns: Vec<SsrPattern>, debug_snippet: Option<String>) -> Result<()> {
-    use base_db::SourceDatabaseExt;
+    use ide_db::base_db::SourceDatabaseExt;
     use ide_db::symbol_index::SymbolsDatabase;
     let (host, _vfs) = load_cargo(&std::env::current_dir()?, true, true)?;
     let db = host.raw_database();
diff --git a/crates/rust-analyzer/src/from_proto.rs b/crates/rust-analyzer/src/from_proto.rs
index 5b9f52993d..aa6b808d6e 100644
--- a/crates/rust-analyzer/src/from_proto.rs
+++ b/crates/rust-analyzer/src/from_proto.rs
@@ -1,8 +1,8 @@
 //! Conversion lsp_types types to rust-analyzer specific ones.
 use std::convert::TryFrom;
 
-use base_db::{FileId, FilePosition, FileRange};
 use ide::{AssistKind, LineCol, LineIndex};
+use ide_db::base_db::{FileId, FilePosition, FileRange};
 use syntax::{TextRange, TextSize};
 use vfs::AbsPathBuf;
 
diff --git a/crates/rust-analyzer/src/global_state.rs b/crates/rust-analyzer/src/global_state.rs
index dafab6a6a7..673a2eebc9 100644
--- a/crates/rust-analyzer/src/global_state.rs
+++ b/crates/rust-analyzer/src/global_state.rs
@@ -5,10 +5,10 @@
 
 use std::{sync::Arc, time::Instant};
 
-use base_db::{CrateId, VfsPath};
 use crossbeam_channel::{unbounded, Receiver, Sender};
 use flycheck::FlycheckHandle;
 use ide::{Analysis, AnalysisHost, Change, FileId};
+use ide_db::base_db::{CrateId, VfsPath};
 use lsp_types::{SemanticTokens, Url};
 use parking_lot::{Mutex, RwLock};
 use project_model::{CargoWorkspace, ProcMacroClient, ProjectWorkspace, Target};
diff --git a/crates/rust-analyzer/src/lsp_utils.rs b/crates/rust-analyzer/src/lsp_utils.rs
index bd888f6347..1d271a9d8b 100644
--- a/crates/rust-analyzer/src/lsp_utils.rs
+++ b/crates/rust-analyzer/src/lsp_utils.rs
@@ -1,8 +1,8 @@
 //! Utilities for LSP-related boilerplate code.
 use std::{error::Error, ops::Range};
 
-use base_db::Canceled;
 use ide::LineIndex;
+use ide_db::base_db::Canceled;
 use lsp_server::Notification;
 
 use crate::{from_proto, global_state::GlobalState};
diff --git a/crates/rust-analyzer/src/main_loop.rs b/crates/rust-analyzer/src/main_loop.rs
index fb18f90147..ed52927330 100644
--- a/crates/rust-analyzer/src/main_loop.rs
+++ b/crates/rust-analyzer/src/main_loop.rs
@@ -5,10 +5,10 @@ use std::{
     time::{Duration, Instant},
 };
 
-use base_db::VfsPath;
 use crossbeam_channel::{select, Receiver};
 use ide::PrimeCachesProgress;
 use ide::{Canceled, FileId};
+use ide_db::base_db::VfsPath;
 use lsp_server::{Connection, Notification, Request, Response};
 use lsp_types::notification::Notification as _;
 use project_model::ProjectWorkspace;
diff --git a/crates/rust-analyzer/src/reload.rs b/crates/rust-analyzer/src/reload.rs
index f7215f1290..0eabd51bdb 100644
--- a/crates/rust-analyzer/src/reload.rs
+++ b/crates/rust-analyzer/src/reload.rs
@@ -1,9 +1,9 @@
 //! Project loading & configuration updates
 use std::{mem, sync::Arc};
 
-use base_db::{CrateGraph, SourceRoot, VfsPath};
 use flycheck::{FlycheckConfig, FlycheckHandle};
 use ide::Change;
+use ide_db::base_db::{CrateGraph, SourceRoot, VfsPath};
 use project_model::{ProcMacroClient, ProjectWorkspace};
 use vfs::{file_set::FileSetConfig, AbsPath, AbsPathBuf, ChangeKind};
 
diff --git a/crates/rust-analyzer/src/to_proto.rs b/crates/rust-analyzer/src/to_proto.rs
index 0d34970bca..24a658fc65 100644
--- a/crates/rust-analyzer/src/to_proto.rs
+++ b/crates/rust-analyzer/src/to_proto.rs
@@ -4,13 +4,13 @@ use std::{
     sync::atomic::{AtomicU32, Ordering},
 };
 
-use base_db::{FileId, FileRange};
 use ide::{
     Assist, AssistKind, CallInfo, CompletionItem, CompletionItemKind, Documentation,
     FileSystemEdit, Fold, FoldKind, Highlight, HighlightModifier, HighlightTag, HighlightedRange,
     Indel, InlayHint, InlayKind, InsertTextFormat, LineIndex, Markup, NavigationTarget,
     ReferenceAccess, ResolvedAssist, Runnable, Severity, SourceChange, SourceFileEdit, TextEdit,
 };
+use ide_db::base_db::{FileId, FileRange};
 use itertools::Itertools;
 use syntax::{SyntaxKind, TextRange, TextSize};
 
@@ -809,7 +809,7 @@ mod tests {
         let completions: Vec<(String, Option<String>)> = analysis
             .completions(
                 &ide::CompletionConfig::default(),
-                base_db::FilePosition { file_id, offset },
+                ide_db::base_db::FilePosition { file_id, offset },
             )
             .unwrap()
             .unwrap()
diff --git a/crates/ssr/Cargo.toml b/crates/ssr/Cargo.toml
index 408140014b..98ed25fb69 100644
--- a/crates/ssr/Cargo.toml
+++ b/crates/ssr/Cargo.toml
@@ -16,7 +16,6 @@ itertools = "0.9.0"
 
 text_edit = { path = "../text_edit", version = "0.0.0" }
 syntax = { path = "../syntax", version = "0.0.0" }
-base_db = { path = "../base_db", version = "0.0.0" }
 ide_db = { path = "../ide_db", version = "0.0.0" }
 hir = { path = "../hir", version = "0.0.0" }
 test_utils = { path = "../test_utils", version = "0.0.0" }
diff --git a/crates/ssr/src/lib.rs b/crates/ssr/src/lib.rs
index ba669fd56c..747ce495d4 100644
--- a/crates/ssr/src/lib.rs
+++ b/crates/ssr/src/lib.rs
@@ -73,8 +73,8 @@ use crate::errors::bail;
 pub use crate::errors::SsrError;
 pub use crate::matching::Match;
 use crate::matching::MatchFailureReason;
-use base_db::{FileId, FilePosition, FileRange};
 use hir::Semantics;
+use ide_db::base_db::{FileId, FilePosition, FileRange};
 use ide_db::source_change::SourceFileEdit;
 use resolving::ResolvedRule;
 use rustc_hash::FxHashMap;
@@ -126,7 +126,7 @@ impl<'db> MatchFinder<'db> {
 
     /// Constructs an instance using the start of the first file in `db` as the lookup context.
     pub fn at_first_file(db: &'db ide_db::RootDatabase) -> Result<MatchFinder<'db>, SsrError> {
-        use base_db::SourceDatabaseExt;
+        use ide_db::base_db::SourceDatabaseExt;
         use ide_db::symbol_index::SymbolsDatabase;
         if let Some(first_file_id) = db
             .local_roots()
@@ -160,7 +160,7 @@ impl<'db> MatchFinder<'db> {
 
     /// Finds matches for all added rules and returns edits for all found matches.
     pub fn edits(&self) -> Vec<SourceFileEdit> {
-        use base_db::SourceDatabaseExt;
+        use ide_db::base_db::SourceDatabaseExt;
         let mut matches_by_file = FxHashMap::default();
         for m in self.matches().matches {
             matches_by_file
@@ -205,7 +205,7 @@ impl<'db> MatchFinder<'db> {
     /// them, while recording reasons why they don't match. This API is useful for command
     /// line-based debugging where providing a range is difficult.
     pub fn debug_where_text_equal(&self, file_id: FileId, snippet: &str) -> Vec<MatchDebugInfo> {
-        use base_db::SourceDatabaseExt;
+        use ide_db::base_db::SourceDatabaseExt;
         let file = self.sema.parse(file_id);
         let mut res = Vec::new();
         let file_text = self.sema.db.file_text(file_id);
diff --git a/crates/ssr/src/matching.rs b/crates/ssr/src/matching.rs
index 948862a775..99b187311a 100644
--- a/crates/ssr/src/matching.rs
+++ b/crates/ssr/src/matching.rs
@@ -6,8 +6,8 @@ use crate::{
     resolving::{ResolvedPattern, ResolvedRule, UfcsCallInfo},
     SsrMatches,
 };
-use base_db::FileRange;
 use hir::Semantics;
+use ide_db::base_db::FileRange;
 use rustc_hash::FxHashMap;
 use std::{cell::Cell, iter::Peekable};
 use syntax::ast::{AstNode, AstToken};
diff --git a/crates/ssr/src/resolving.rs b/crates/ssr/src/resolving.rs
index 347cc4aad8..f5ceb57292 100644
--- a/crates/ssr/src/resolving.rs
+++ b/crates/ssr/src/resolving.rs
@@ -2,7 +2,7 @@
 
 use crate::errors::error;
 use crate::{parsing, SsrError};
-use base_db::FilePosition;
+use ide_db::base_db::FilePosition;
 use parsing::Placeholder;
 use rustc_hash::FxHashMap;
 use syntax::{ast, SmolStr, SyntaxKind, SyntaxNode, SyntaxToken};
diff --git a/crates/ssr/src/search.rs b/crates/ssr/src/search.rs
index a595fd269c..44b5db029d 100644
--- a/crates/ssr/src/search.rs
+++ b/crates/ssr/src/search.rs
@@ -5,7 +5,7 @@ use crate::{
     resolving::{ResolvedPath, ResolvedPattern, ResolvedRule},
     Match, MatchFinder,
 };
-use base_db::{FileId, FileRange};
+use ide_db::base_db::{FileId, FileRange};
 use ide_db::{
     defs::Definition,
     search::{Reference, SearchScope},
@@ -145,7 +145,7 @@ impl<'db> MatchFinder<'db> {
     fn search_files_do(&self, mut callback: impl FnMut(FileId)) {
         if self.restrict_ranges.is_empty() {
             // Unrestricted search.
-            use base_db::SourceDatabaseExt;
+            use ide_db::base_db::SourceDatabaseExt;
             use ide_db::symbol_index::SymbolsDatabase;
             for &root in self.sema.db.local_roots().iter() {
                 let sr = self.sema.db.source_root(root);
diff --git a/crates/ssr/src/tests.rs b/crates/ssr/src/tests.rs
index 20231a9bc6..63131f6ca5 100644
--- a/crates/ssr/src/tests.rs
+++ b/crates/ssr/src/tests.rs
@@ -1,6 +1,6 @@
 use crate::{MatchFinder, SsrRule};
-use base_db::{salsa::Durability, FileId, FilePosition, FileRange, SourceDatabaseExt};
 use expect_test::{expect, Expect};
+use ide_db::base_db::{salsa::Durability, FileId, FilePosition, FileRange, SourceDatabaseExt};
 use rustc_hash::FxHashSet;
 use std::sync::Arc;
 use test_utils::{mark, RangeOrOffset};
@@ -62,7 +62,7 @@ fn parser_undefined_placeholder_in_replacement() {
 /// `code` may optionally contain a cursor marker `<|>`. If it doesn't, then the position will be
 /// the start of the file. If there's a second cursor marker, then we'll return a single range.
 pub(crate) fn single_file(code: &str) -> (ide_db::RootDatabase, FilePosition, Vec<FileRange>) {
-    use base_db::fixture::WithFixture;
+    use ide_db::base_db::fixture::WithFixture;
     use ide_db::symbol_index::SymbolsDatabase;
     let (mut db, file_id, range_or_offset) = if code.contains(test_utils::CURSOR_MARKER) {
         ide_db::RootDatabase::with_range_or_offset(code)
@@ -83,7 +83,7 @@ pub(crate) fn single_file(code: &str) -> (ide_db::RootDatabase, FilePosition, Ve
         }
     }
     let mut local_roots = FxHashSet::default();
-    local_roots.insert(base_db::fixture::WORKSPACE);
+    local_roots.insert(ide_db::base_db::fixture::WORKSPACE);
     db.set_local_roots_with_durability(Arc::new(local_roots), Durability::HIGH);
     (db, position, selections)
 }