pindexer: dex: create indices for dex batch swaps

crates/bin/pindexer/src/dex/dex.sql

@@ -121,8 +121,8 @@ CREATE TABLE IF NOT EXISTS dex_batch_swap (
   trace12_end INTEGER REFERENCES dex_trace (id),
   trace21_start INTEGER REFERENCES dex_trace (id),
   trace21_end INTEGER REFERENCES dex_trace (id),
-  pair_asset1 BYTEA NOT NULL,
-  pair_asset2 BYTEA NOT NULL,
+  asset1 BYTEA NOT NULL,
+  asset2 BYTEA NOT NULL,
   unfilled1 Amount NOT NULL,
   unfilled2 Amount NOT NULL,
   delta1 Amount NOT NULL,
@@ -131,6 +131,10 @@ CREATE TABLE IF NOT EXISTS dex_batch_swap (
   lambda2 Amount NOT NULL
 );
 
+CREATE INDEX ON dex_batch_swap(height);
+CREATE INDEX ON dex_batch_swap(asset1, height);
+CREATE INDEX ON dex_batch_swap(asset2, height);
+
 -- Represents instances of invididual swaps into the batch.
 CREATE TABLE IF NOT EXISTS dex_swap (
   id SERIAL PRIMARY KEY,