Add per-table % reduction columns to compare-bloat output

Author: teknogeek0

pgcopydb-helpers/compare-bloat.sh

@@ -148,10 +148,10 @@ TOTAL_TGT_IDX=0
 TABLE_COUNT=0
 
 echo ""
-printf "  ${BOLD}%-40s %10s %10s %10s %10s %10s %10s${NC}\n" \
-    "Table" "Src Heap" "Tgt Heap" "Src TOAST" "Tgt TOAST" "Src Idx" "Tgt Idx"
-printf "  %-40s %10s %10s %10s %10s %10s %10s\n" \
-    "────────────────────────────────────────" "──────────" "──────────" "──────────" "──────────" "──────────" "──────────"
+printf "  ${BOLD}%-40s %10s %10s %6s %10s %10s %6s %10s %10s %6s${NC}\n" \
+    "Table" "Src Heap" "Tgt Heap" "Heap%" "Src TOAST" "Tgt TOAST" "TOAST%" "Src Idx" "Tgt Idx" "Idx%"
+printf "  %-40s %10s %10s %6s %10s %10s %6s %10s %10s %6s\n" \
+    "────────────────────────────────────────" "──────────" "──────────" "──────" "──────────" "──────────" "──────" "──────────" "──────────" "──────"
 
 while IFS='|' read -r name src_heap src_toast src_idx src_rows; do
     [ -z "$name" ] && continue
@@ -174,19 +174,27 @@ while IFS='|' read -r name src_heap src_toast src_idx src_rows; do
         display_name="${display_name:0:37}..."
     fi
 
-    printf "  %-40s %10s %10s %10s %10s %10s %10s\n" \
+    heap_diff=$((src_heap - tgt_heap))
+    toast_diff=$((src_toast - tgt_toast))
+    idx_diff=$((src_idx - tgt_idx))
+
+    printf "  %-40s %10s %10s %6s %10s %10s %6s %10s %10s %6s\n" \
         "$display_name" \
-        "$(human_size "$src_heap")" "$(human_size "$tgt_heap")" \
-        "$(human_size "$src_toast")" "$(human_size "$tgt_toast")" \
-        "$(human_size "$src_idx")" "$(human_size "$tgt_idx")"
+        "$(human_size "$src_heap")" "$(human_size "$tgt_heap")" "$(pct "$heap_diff" "$src_heap")" \
+        "$(human_size "$src_toast")" "$(human_size "$tgt_toast")" "$(pct "$toast_diff" "$src_toast")" \
+        "$(human_size "$src_idx")" "$(human_size "$tgt_idx")" "$(pct "$idx_diff" "$src_idx")"
 done <<< "$SRC_TABLES"
 
 echo ""
-printf "  ${BOLD}%-40s %10s %10s %10s %10s %10s %10s${NC}\n" \
+HEAP_DIFF_TOTAL=$((TOTAL_SRC_HEAP - TOTAL_TGT_HEAP))
+TOAST_DIFF_TOTAL=$((TOTAL_SRC_TOAST - TOTAL_TGT_TOAST))
+IDX_DIFF_TOTAL=$((TOTAL_SRC_IDX - TOTAL_TGT_IDX))
+
+printf "  ${BOLD}%-40s %10s %10s %6s %10s %10s %6s %10s %10s %6s${NC}\n" \
     "TOTALS ($TABLE_COUNT tables)" \
-    "$(human_size "$TOTAL_SRC_HEAP")" "$(human_size "$TOTAL_TGT_HEAP")" \
-    "$(human_size "$TOTAL_SRC_TOAST")" "$(human_size "$TOTAL_TGT_TOAST")" \
-    "$(human_size "$TOTAL_SRC_IDX")" "$(human_size "$TOTAL_TGT_IDX")"
+    "$(human_size "$TOTAL_SRC_HEAP")" "$(human_size "$TOTAL_TGT_HEAP")" "$(pct "$HEAP_DIFF_TOTAL" "$TOTAL_SRC_HEAP")" \
+    "$(human_size "$TOTAL_SRC_TOAST")" "$(human_size "$TOTAL_TGT_TOAST")" "$(pct "$TOAST_DIFF_TOTAL" "$TOTAL_SRC_TOAST")" \
+    "$(human_size "$TOTAL_SRC_IDX")" "$(human_size "$TOTAL_TGT_IDX")" "$(pct "$IDX_DIFF_TOTAL" "$TOTAL_SRC_IDX")"
 
 # --- Section 3: Top Indexes by Size Difference ---
 echo ""