Initial commit

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

database_schema_display.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+# list SQLite schemas, tables, and columns (type, notnull, default, pk)
+# Usage: ./database_schema_display.sh path/to/db.sqlite
+
+set -euo pipefail
+
+DB_PATH="${1:-}"
+
+if [[ -z "$DB_PATH" ]]; then
+  echo "Usage: $0 path/to/database.sqlite" >&2
+  exit 1
+fi
+if [[ ! -f "$DB_PATH" ]]; then
+  echo "Error: Database file '$DB_PATH' does not exist." >&2
+  exit 1
+fi
+
+echo "=== Schemas (databases) ==="
+# Show as-is for human info
+sqlite3 "$DB_PATH" ".databases" || true
+echo ""
+
+# Get schema names via PRAGMA (stable across sqlite versions)
+schemas=$(sqlite3 -noheader -separator '|' "$DB_PATH" "PRAGMA database_list;" | awk -F'|' '{print $2}')
+
+# Fallback if empty (very old sqlite): assume main
+if [[ -z "$schemas" ]]; then
+  schemas="main"
+fi
+
+for schema in $schemas; do
+  echo "=== Schema: $schema ==="
+
+  # Get user tables (exclude internal sqlite_% tables)
+  tables=$(sqlite3 -noheader "$DB_PATH" \
+    "SELECT name
+       FROM \"$schema\".sqlite_schema
+      WHERE type='table' AND name NOT LIKE 'sqlite_%'
+      ORDER BY name;")
+
+  if [[ -z "$tables" ]]; then
+    echo "  (no user tables)"
+    echo ""
+    continue
+  fi
+
+  # Iterate tables safely line-by-line
+  while IFS= read -r table; do
+    [[ -z "$table" ]] && continue
+    echo "  -> Table: $table"
+    # Columns: cid|name|type|notnull|dflt_value|pk
+    sqlite3 -noheader -separator '|' "$DB_PATH" "PRAGMA \"$schema\".table_info('$table');" \
+    | awk -F'|' '
+      BEGIN {
+        printf "     %-28s %-16s %-8s %-16s %-3s\n", "Column", "Type", "NotNull", "Default", "PK"
+        printf "     %-28s %-16s %-8s %-16s %-3s\n", "------", "----", "-------", "-------", "--"
+      }
+      {
+        dv = ($5 == "" ? "NULL" : $5)
+        printf "     %-28s %-16s %-8s %-16s %-3s\n", $2, $3, $4, dv, $6
+      }
+    '
+    echo ""
+  done <<< "$tables"
+done