diff --git a/pkg/schema/parse.go b/pkg/schema/parse.go
index c797f98..a44602c 100644
--- a/pkg/schema/parse.go
+++ b/pkg/schema/parse.go
@@ -2,6 +2,8 @@ package schema
 
 import (
 	_ "embed"
+	"fmt"
+	"os"
 	"strings"
 
 	"github.com/jinzhu/inflection"
@@ -22,6 +24,14 @@ func InitDB(sql_schema string) *sqlx.DB {
 	return db
 }
 
+func SchemaFromSQLFile(filepath string) (Schema, error) {
+	sqlBytes, err := os.ReadFile(filepath)
+	if err != nil {
+		return Schema{}, fmt.Errorf("failed to read SQL file: %w", err)
+	}
+	return SchemaFromDB(InitDB(string(sqlBytes))), nil
+}
+
 // SchemaFromDB takes a DB connection, checks its schema metadata tables, and returns a Schema.
 func SchemaFromDB(db *sqlx.DB) Schema {
 	ret := Schema{Tables: map[string]Table{}, Indexes: map[string]Index{}}
diff --git a/pkg/schema/table.go b/pkg/schema/table.go
index cc69032..b97bb8c 100644
--- a/pkg/schema/table.go
+++ b/pkg/schema/table.go
@@ -9,6 +9,7 @@ type Column struct {
 	HasDefaultValue        bool   `db:"has_default_value"`
 	DefaultValue           string `db:"dflt_value"`
 	IsPrimaryKey           bool   `db:"is_primary_key"`
+	PrimaryKeyRank         uint   `db:"primary_key_rank"`
 	IsForeignKey           bool   `db:"is_foreign_key"`
 	ForeignKeyTargetTable  string `db:"fk_target_table"`
 	ForeignKeyTargetColumn string `db:"fk_target_column"`
diff --git a/pkg/schema/views.sql b/pkg/schema/views.sql
index ca6eca0..915f1c7 100644
--- a/pkg/schema/views.sql
+++ b/pkg/schema/views.sql
@@ -15,7 +15,8 @@ create temporary view columns as
            "notnull",
            dflt_value is not null as has_default_value,
            ifnull(dflt_value, 0) dflt_value,
-           pk as is_primary_key,
+           pk != 0 as is_primary_key,
+           pk as primary_key_rank,
            fk."table" is not null as is_foreign_key,
            ifnull(fk."table", '') as fk_target_table,
            ifnull(fk."to", '') as fk_target_column