Added more examples and pgsql reader

tests/postgres/run_tests.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+set -e
+
+# RelSpec PostgreSQL Integration Tests Runner
+# This script starts a PostgreSQL Docker container and runs integration tests
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+echo "=== RelSpec PostgreSQL Integration Tests ==="
+echo ""
+
+# Colors for output
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+# Check if docker-compose is available
+if ! command -v docker-compose &> /dev/null && ! command -v docker &> /dev/null; then
+    echo -e "${RED}Error: docker-compose or docker is not installed${NC}"
+    exit 1
+fi
+
+# Determine docker compose command
+if command -v docker-compose &> /dev/null; then
+    DOCKER_COMPOSE="docker-compose"
+else
+    DOCKER_COMPOSE="docker compose"
+fi
+
+# Change to project root
+cd "$PROJECT_ROOT"
+
+# Function to cleanup
+cleanup() {
+    echo -e "\n${YELLOW}Cleaning up...${NC}"
+    $DOCKER_COMPOSE down
+}
+
+# Trap exit to cleanup
+trap cleanup EXIT
+
+# Start PostgreSQL container
+echo -e "${YELLOW}Starting PostgreSQL container...${NC}"
+$DOCKER_COMPOSE up -d postgres
+
+# Wait for PostgreSQL to be ready
+echo -e "${YELLOW}Waiting for PostgreSQL to be ready...${NC}"
+max_attempts=30
+attempt=0
+
+while [ $attempt -lt $max_attempts ]; do
+    if $DOCKER_COMPOSE exec -T postgres pg_isready -U relspec -d relspec_test &> /dev/null; then
+        echo -e "${GREEN}PostgreSQL is ready!${NC}"
+        break
+    fi
+    attempt=$((attempt + 1))
+    echo -n "."
+    sleep 1
+done
+
+if [ $attempt -eq $max_attempts ]; then
+    echo -e "\n${RED}Error: PostgreSQL failed to start${NC}"
+    exit 1
+fi
+
+# Give it one more second to fully initialize
+sleep 2
+
+# Show database stats
+echo -e "\n${YELLOW}Database Information:${NC}"
+$DOCKER_COMPOSE exec -T postgres psql -U relspec -d relspec_test -c "
+SELECT
+    (SELECT COUNT(*) FROM pg_namespace WHERE nspname NOT IN ('pg_catalog', 'information_schema', 'pg_toast') AND nspname NOT LIKE 'pg_%') as schemas,
+    (SELECT COUNT(*) FROM pg_tables WHERE schemaname NOT IN ('pg_catalog', 'information_schema')) as tables,
+    (SELECT COUNT(*) FROM pg_views WHERE schemaname NOT IN ('pg_catalog', 'information_schema')) as views,
+    (SELECT COUNT(*) FROM pg_sequences WHERE schemaname NOT IN ('pg_catalog', 'information_schema')) as sequences;
+"
+
+# Set environment variable for tests
+export RELSPEC_TEST_PG_CONN="postgres://relspec:relspec_test_password@localhost:5433/relspec_test"
+
+echo -e "\n${YELLOW}Running PostgreSQL reader tests...${NC}"
+echo "Connection string: $RELSPEC_TEST_PG_CONN"
+echo ""
+
+# Run the tests
+if go test -v ./pkg/readers/pgsql/ -count=1; then
+    echo -e "\n${GREEN}✓ All tests passed!${NC}"
+    exit 0
+else
+    echo -e "\n${RED}✗ Tests failed${NC}"
+    exit 1
+fi