The rest of linter errors.

generator/postgres/postgres_generator.go

@@ -35,7 +35,7 @@ func Generate(destDir string, dbConn DBConnection) error {
 	}
 
 	fmt.Println("Retrieving schema information...")
-	schemaInfo, err := metadata.GetSchemaInfo(db, dbConn.SchemaName, &metadata.PostgresQuerySet{})
+	schemaInfo, err := metadata.GetSchemaInfo(db, dbConn.SchemaName, &postgresQuerySet{})
 
 	if err != nil {
 		return err

generator/postgres/query_set.go

@@ -0,0 +1,88 @@
+package postgres
+
+import (
+	"database/sql"
+	"github.com/go-jet/jet/generator/internal/metadata"
+)
+
+// postgresQuerySet is dialect query set for PostgreSQL
+type postgresQuerySet struct{}
+
+func (p *postgresQuerySet) ListOfTablesQuery() string {
+	return `
+SELECT table_name 
+FROM information_schema.tables
+where table_schema = $1 and table_type = 'BASE TABLE';
+`
+}
+
+func (p *postgresQuerySet) PrimaryKeysQuery() string {
+	return `
+SELECT c.column_name
+FROM information_schema.key_column_usage AS c
+LEFT JOIN information_schema.table_constraints AS t
+ON t.constraint_name = c.constraint_name
+WHERE t.table_schema = $1 AND t.table_name = $2 AND t.constraint_type = 'PRIMARY KEY';
+`
+}
+
+func (p *postgresQuerySet) ListOfColumnsQuery() string {
+	return `
+SELECT column_name, is_nullable, data_type, udt_name, FALSE
+FROM information_schema.columns
+where table_schema = $1 and table_name = $2
+order by ordinal_position;`
+}
+
+func (p *postgresQuerySet) ListOfEnumsQuery() string {
+	return `
+SELECT t.typname,  
+       e.enumlabel
+FROM pg_catalog.pg_type t 
+   JOIN pg_catalog.pg_enum e on t.oid = e.enumtypid  
+   JOIN pg_catalog.pg_namespace n ON n.oid = t.typnamespace
+WHERE n.nspname = $1
+ORDER BY n.nspname, t.typname, e.enumsortorder;`
+}
+
+func (p *postgresQuerySet) GetEnumsMetaData(db *sql.DB, schemaName string) ([]metadata.MetaData, error) {
+	rows, err := db.Query(p.ListOfEnumsQuery(), schemaName)
+
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	enumsInfosMap := map[string][]string{}
+	for rows.Next() {
+		var enumName string
+		var enumValue string
+		err = rows.Scan(&enumName, &enumValue)
+		if err != nil {
+			return nil, err
+		}
+
+		enumValues := enumsInfosMap[enumName]
+
+		enumValues = append(enumValues, enumValue)
+
+		enumsInfosMap[enumName] = enumValues
+	}
+
+	err = rows.Err()
+
+	if err != nil {
+		return nil, err
+	}
+
+	ret := []metadata.MetaData{}
+
+	for enumName, enumValues := range enumsInfosMap {
+		ret = append(ret, metadata.EnumMetaData{
+			EnumName: enumName,
+			Values:   enumValues,
+		})
+	}
+
+	return ret, nil
+}