diff --git a/src/main/java/at/procon/dip/search/repository/DocumentTrigramSearchRepositoryImpl.java b/src/main/java/at/procon/dip/search/repository/DocumentTrigramSearchRepositoryImpl.java
index a2a6975..c8375b6 100644
--- a/src/main/java/at/procon/dip/search/repository/DocumentTrigramSearchRepositoryImpl.java
+++ b/src/main/java/at/procon/dip/search/repository/DocumentTrigramSearchRepositoryImpl.java
@@ -19,9 +19,9 @@ public class DocumentTrigramSearchRepositoryImpl implements DocumentTrigramSearc
     @Override
     public List<SearchHit> search(SearchExecutionContext context, int limit, double threshold) {
         String scoreExpr = "GREATEST(" +
-                "similarity(COALESCE(d.title, ''), :queryText), " +
-                "similarity(COALESCE(d.summary, ''), :queryText), " +
-                "similarity(COALESCE(dtr.text_body, ''), :queryText))";
+                "doc.similarity(COALESCE(d.title, ''), :queryText), " +
+                "doc.similarity(COALESCE(d.summary, ''), :queryText), " +
+                "doc.similarity(COALESCE(dtr.text_body, ''), :queryText))";
 
         StringBuilder sql = new StringBuilder("SELECT " +
                 "d.id AS document_id, " +
@@ -38,9 +38,9 @@ public class DocumentTrigramSearchRepositoryImpl implements DocumentTrigramSearc
                 "LEFT(COALESCE(dtr.text_body, COALESCE(d.summary, d.title, '')), 400) AS snippet, " +
                 scoreExpr + " AS score, " +
                 "CASE " +
-                "WHEN similarity(COALESCE(d.title, ''), :queryText) >= similarity(COALESCE(d.summary, ''), :queryText) " +
-                " AND similarity(COALESCE(d.title, ''), :queryText) >= similarity(COALESCE(dtr.text_body, ''), :queryText) THEN 'DOCUMENT_TITLE' " +
-                "WHEN similarity(COALESCE(d.summary, ''), :queryText) >= similarity(COALESCE(dtr.text_body, ''), :queryText) THEN 'DOCUMENT_SUMMARY' " +
+                "WHEN doc.similarity(COALESCE(d.title, ''), :queryText) >= doc.similarity(COALESCE(d.summary, ''), :queryText) " +
+                " AND doc.similarity(COALESCE(d.title, ''), :queryText) >= doc.similarity(COALESCE(dtr.text_body, ''), :queryText) THEN 'DOCUMENT_TITLE' " +
+                "WHEN doc.similarity(COALESCE(d.summary, ''), :queryText) >= doc.similarity(COALESCE(dtr.text_body, ''), :queryText) THEN 'DOCUMENT_SUMMARY' " +
                 "ELSE 'REPRESENTATION_TEXT' END AS matched_field " +
                 "FROM doc.doc_text_representation dtr " +
                 "JOIN doc.doc_document d ON d.id = dtr.document_id " +
diff --git a/src/main/resources/db/migration/V9__doc_search_slice1_support.sql b/src/main/resources/db/migration/V9__doc_search_slice1_support.sql
index d797ad9..863c71d 100644
--- a/src/main/resources/db/migration/V9__doc_search_slice1_support.sql
+++ b/src/main/resources/db/migration/V9__doc_search_slice1_support.sql
@@ -1,26 +1,26 @@
 -- Slice 1 generic lexical search support.
 -- Adds PostgreSQL full-text and trigram search infrastructure for DOC-side search.
 
-CREATE EXTENSION IF NOT EXISTS pg_trgm;
+CREATE EXTENSION IF NOT EXISTS pg_trgm with schema doc;
 
-ALTER TABLE DOC.doc_text_representation
+ALTER TABLE doc.doc_text_representation
     ADD COLUMN IF NOT EXISTS search_config VARCHAR(64);
 
-ALTER TABLE DOC.doc_text_representation
+ALTER TABLE doc.doc_text_representation
     ADD COLUMN IF NOT EXISTS search_vector tsvector;
 
 CREATE INDEX IF NOT EXISTS idx_doc_text_repr_search_vector
-    ON DOC.doc_text_representation
+    ON doc.doc_text_representation
     USING GIN (search_vector);
 
 CREATE INDEX IF NOT EXISTS idx_doc_document_title_trgm
-    ON DOC.doc_document
-    USING GIN (title gin_trgm_ops);
+    ON doc.doc_document
+    USING GIN (title doc.gin_trgm_ops);
 
 CREATE INDEX IF NOT EXISTS idx_doc_document_summary_trgm
-    ON DOC.doc_document
-    USING GIN (summary gin_trgm_ops);
+    ON doc.doc_document
+    USING GIN (summary doc.gin_trgm_ops);
 
 CREATE INDEX IF NOT EXISTS idx_doc_text_repr_text_trgm
-    ON DOC.doc_text_representation
-    USING GIN (text_body gin_trgm_ops);
+    ON doc.doc_text_representation
+    USING GIN (text_body doc.gin_trgm_ops);