db-conn-pgsql/dist/dialect/PgSqlDialect.js

Database Connecton Postgres SQL

export class PgSqlDialect {
    async table(conn, table) {
        const sql = `select table_name as "TableName", 
		column_name as "ColumnName",
		ordinal_position as "OrdinalPosition", 
		column_default as "ColumnDefault", 
		udt_name as "ColumnType", 
		is_nullable as "IsNullable",
		character_maximum_length as "CharacterMaxiumLength",
		NUMERIC_PRECISION as "NumericPercision", 
		NUMERIC_SCALE as "NumericScale",
		t4.description as "TableComment",
		t3.description as "ColumnComment"
	from information_schema.columns t1 
		inner join pg_class t2 on t2.relname = t1.table_name
		left join pg_description t3 on t3.objoid = t2.oid and t3.objsubid=t1.ordinal_position
		left join pg_description t4 on t4.objoid = t2.oid and t4.objsubid=0
	where table_schema = 'public' and table_name = ?
	order by table_name, ordinal_position`;
        const rs = await conn.executeQuery(sql, [table]);
        const oTable = {};
        oTable.name = table;
        oTable.fieldsOrder = [];
        oTable.fields = {};
        for (const row of rs) {
            const fieldName = row['ColumnName'];
            oTable.fieldsOrder.push(fieldName);
            oTable.fields[fieldName] = {};
        }
        return oTable;
    }
    ;
    quote() {
        return '"';
    }
    ;
}
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