Function TestETLSchemaEvolution

server/etl_patterns_test.go:252–308

(t *testing.T)

}

func TestETLSchemaEvolution(t *testing.T) {
	// ETL tools handle schema changes
	tests := []struct {
		name           string
		query          string
		returnsResults bool
		commandType    string
	}{
		// Add column
		{
			name:           "add column",
			query:          "ALTER TABLE users ADD COLUMN phone VARCHAR",
			returnsResults: false,
			commandType:    "ALTER TABLE",
		},

		// Drop column
		{
			name:           "drop column",
			query:          "ALTER TABLE users DROP COLUMN deprecated_field",
			returnsResults: false,
			commandType:    "ALTER TABLE",
		},

		// Rename column
		{
			name:           "rename column",
			query:          "ALTER TABLE users RENAME COLUMN old_name TO new_name",
			returnsResults: false,
			commandType:    "ALTER TABLE",
		},

		// Change column type
		{
			name:           "alter column type",
			query:          "ALTER TABLE users ALTER COLUMN id TYPE BIGINT",
			returnsResults: false,
			commandType:    "ALTER TABLE",
		},
	}

	c := &clientConn{}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := queryReturnsResults(tt.query)
			if result != tt.returnsResults {
				t.Errorf("queryReturnsResults(%q) = %v, want %v", tt.query, result, tt.returnsResults)
			}

			cmdType := c.getCommandType(tt.query)
			if cmdType != tt.commandType {
				t.Errorf("getCommandType(%q) = %q, want %q", tt.query, cmdType, tt.commandType)
			}
		})
	}
}