Update README.md

README.md

@@ -32,7 +32,79 @@ Click this link to learn how to load the dataset to [Chipmunk](https://github.co
 
 ### Use directly in PostgreSQL
 
-
+1. Create Table
+
+```sql
+CREATE TABLE IF NOT EXISTS is_pd12m (
+    id BIGSERIAL PRIMARY KEY,
+    url VARCHAR NOT NULL,
+    hash VARCHAR NOT NULL DEFAULT '',
+    caption VARCHAR NOT NULL DEFAULT '',
+    caption_long VARCHAR NOT NULL DEFAULT '',
+    origin_hash VARCHAR NOT NULL DEFAULT '',
+    origin_width BIGINT NOT NULL DEFAULT 0,
+    origin_height BIGINT NOT NULL DEFAULT 0,
+    origin_storage_id VARCHAR(1024) DEFAULT NULL,
+    processed_storage_id VARCHAR(1024) NOT NULL DEFAULT '',
+    processed_width BIGINT NOT NULL DEFAULT 0,
+    processed_height BIGINT NOT NULL DEFAULT 0,
+    aspect_ratio DOUBLE PRECISION NOT NULL DEFAULT 0,
+    exif JSONB NOT NULL DEFAULT '{EMPTY_OBJECT}',
+    meta JSONB NOT NULL DEFAULT '{EMPTY_OBJECT}',
+    source JSONB NOT NULL DEFAULT '[]',
+    vector halfvec(1152) DEFAULT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+```
+  
+2. Load csv file to database
+
+2.1. Load the dataset from local file system to a remote PostgreSQL server:
+
+```sql
+\copy is_pd12m FROM 'data/0000000.csv' CSV HEADER;
+\copy is_pd12m FROM 'data/0000001.csv' CSV HEADER;
+\copy is_pd12m FROM 'data/0000002.csv' CSV HEADER;
+...
+```
+
+2.2. Load the dataset from the PostgreSQL server's file system:
+
+```sql
+copy is_pd12m FROM 'data/0000000.csv' CSV HEADER;
+copy is_pd12m FROM 'data/0000001.csv' CSV HEADER;
+copy is_pd12m FROM 'data/0000002.csv' CSV HEADER;
+...
+```
+
+3. Create Indexes
+
+```sql
+CREATE UNIQUE INDEX IF NOT EXISTS is_pd12m_url_index ON is_pd12m (url);
+CREATE INDEX IF NOT EXISTS is_pd12m_origin_width_index ON is_pd12m (origin_width);
+CREATE INDEX IF NOT EXISTS is_pd12m_origin_height_index ON is_pd12m (origin_height);
+CREATE INDEX IF NOT EXISTS is_pd12m_origin_storage_id_index ON is_pd12m (origin_storage_id);
+CREATE INDEX IF NOT EXISTS is_pd12m_processed_storage_id_index ON is_pd12m (processed_storage_id);
+CREATE INDEX IF NOT EXISTS is_pd12m_processed_width_index ON is_pd12m (processed_width);
+CREATE INDEX IF NOT EXISTS is_pd12m_processed_height_index ON is_pd12m (processed_height);
+CREATE INDEX IF NOT EXISTS is_pd12m_aspect_ratio_index ON is_pd12m (aspect_ratio);
+CREATE INDEX IF NOT EXISTS is_pd12m_exif_index ON is_pd12m USING gin(exif);
+CREATE INDEX IF NOT EXISTS is_pd12m_meta_index ON is_pd12m USING gin(meta);
+CREATE INDEX IF NOT EXISTS is_pd12m_source_index ON is_pd12m USING gin(source);
+CREATE INDEX IF NOT EXISTS is_pd12m_created_at_index ON is_pd12m (created_at);
+CREATE INDEX IF NOT EXISTS is_pd12m_updated_at_index ON is_pd12m (updated_at);
+CREATE INDEX IF NOT EXISTS {table_name}_vector_index ON is_pd12m USING vchordrq (vector halfvec_l2_ops)  WITH (options = $$
+    residual_quantization = true
+    [build.internal]
+    lists = [20000]
+    build_threads = 6
+    spherical_centroids = false
+$$);
+f"CREATE INDEX IF NOT EXISTS is_pd12m_caption_index ON is_pd12m (caption) WHERE caption = '';
+f"CREATE INDEX IF NOT EXISTS is_pd12m_caption_long_index ON is_pd12m (caption_long) WHERE caption_long = '';
+f'CREATE INDEX IF NOT EXISTS is_pd12m_vector_null_index ON is_pd12m (vector) WHERE vector IS NULL;
+```
 
 ## Dataset Structure