author | wenzelm |
Fri, 12 May 2017 11:56:41 +0200 | |
changeset 65804 | 73ed0ebac3b0 |
parent 65780 | 8baf789b1537 |
child 65890 | 1b004f5974af |
permissions | -rw-r--r-- |
63788 | 1 |
/* Title: Pure/General/sql.scala |
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Author: Makarius |
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Support for SQL databases: SQLite and PostgreSQL. |
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*/ |
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package isabelle |
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import java.time.OffsetDateTime |
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import java.sql.{DriverManager, Connection, PreparedStatement, ResultSet} |
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import scala.collection.mutable |
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object SQL |
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{ |
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/** SQL language **/ |
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type Source = String |
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/* concrete syntax */ |
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def escape_char(c: Char): String = |
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c match { |
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case '\u0000' => "\\0" |
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case '\'' => "\\'" |
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case '\"' => "\\\"" |
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case '\b' => "\\b" |
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case '\n' => "\\n" |
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case '\r' => "\\r" |
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case '\t' => "\\t" |
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case '\u001a' => "\\Z" |
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case '\\' => "\\\\" |
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case _ => c.toString |
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} |
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def string(s: String): Source = |
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"'" + s.map(escape_char(_)).mkString + "'" |
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def ident(s: String): Source = |
65677
7d25b8dbdbfa
proper quote (amending 546020a98a91): e.g. relevant for "ISABELLE_BUILD_OPTIONS";
wenzelm
parents:
65673
diff
changeset
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Long_Name.implode(Long_Name.explode(s).map(a => quote(a.replace("\"", "\"\"")))) |
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def enclose(s: Source): Source = "(" + s + ")" |
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def enclosure(ss: Iterable[Source]): Source = ss.mkString("(", ", ", ")") |
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def select(columns: List[Column] = Nil, distinct: Boolean = false): Source = |
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"SELECT " + (if (distinct) "DISTINCT " else "") + |
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(if (columns.isEmpty) "*" else commas(columns.map(_.ident))) + " FROM " |
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65644
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support for qualified names, which are not quoted (e.g. for SQLite);
wenzelm
parents:
65641
diff
changeset
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val join_outer: Source = " LEFT OUTER JOIN " |
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val join_inner: Source = " INNER JOIN " |
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def join(outer: Boolean): Source = if (outer) join_outer else join_inner |
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def member(x: Source, set: Iterable[String]): Source = |
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set.iterator.map(a => x + " = " + SQL.string(a)).mkString("(", " OR ", ")") |
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/* types */ |
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object Type extends Enumeration |
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{ |
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val Boolean = Value("BOOLEAN") |
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val Int = Value("INTEGER") |
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val Long = Value("BIGINT") |
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val Double = Value("DOUBLE PRECISION") |
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val String = Value("TEXT") |
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val Bytes = Value("BLOB") |
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val Date = Value("TIMESTAMP WITH TIME ZONE") |
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} |
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def sql_type_default(T: Type.Value): Source = T.toString |
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def sql_type_sqlite(T: Type.Value): Source = |
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if (T == Type.Boolean) "INTEGER" |
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else if (T == Type.Date) "TEXT" |
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else sql_type_default(T) |
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def sql_type_postgresql(T: Type.Value): Source = |
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if (T == Type.Bytes) "BYTEA" |
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else sql_type_default(T) |
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/* columns */ |
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object Column |
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{ |
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def bool(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.Boolean, strict, primary_key) |
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def int(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.Int, strict, primary_key) |
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def long(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.Long, strict, primary_key) |
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def double(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.Double, strict, primary_key) |
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def string(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.String, strict, primary_key) |
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def bytes(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.Bytes, strict, primary_key) |
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def date(name: String, strict: Boolean = false, primary_key: Boolean = false): Column = |
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Column(name, Type.Date, strict, primary_key) |
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} |
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sealed case class Column( |
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name: String, T: Type.Value, strict: Boolean = false, primary_key: Boolean = false, |
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expr: SQL.Source = "") |
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{ |
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def apply(table: Table): Column = |
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Column(Long_Name.qualify(table.name, name), T, strict = strict, primary_key = primary_key) |
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65644
7ef438495a02
support for qualified names, which are not quoted (e.g. for SQLite);
wenzelm
parents:
65641
diff
changeset
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def ident: Source = |
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if (expr == "") SQL.ident(name) |
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else enclose(expr) + " AS " + SQL.ident(name) |
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def decl(sql_type: Type.Value => Source): Source = |
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ident + " " + sql_type(T) + (if (strict || primary_key) " NOT NULL" else "") |
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def where_equal(s: String): Source = "WHERE " + ident + " = " + string(s) |
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override def toString: Source = ident |
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} |
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/* tables */ |
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sealed case class Table(name: String, columns: List[Column], body: Source = "") |
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{ |
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private val columns_index: Map[String, Int] = |
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columns.iterator.map(_.name).zipWithIndex.toMap |
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Library.duplicates(columns.map(_.name)) match { |
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case Nil => |
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case bad => error("Duplicate column names " + commas_quote(bad) + " for table " + quote(name)) |
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} |
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def ident: Source = SQL.ident(name) |
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def query: Source = |
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if (body == "") error("Missing SQL body for table " + quote(name)) |
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else SQL.enclose(body) |
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def query_named: Source = query + " AS " + SQL.ident(name) |
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def create(strict: Boolean = false, sql_type: Type.Value => Source): Source = |
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{ |
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val primary_key = |
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columns.filter(_.primary_key).map(_.name) match { |
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case Nil => Nil |
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case keys => List("PRIMARY KEY " + enclosure(keys)) |
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} |
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"CREATE TABLE " + (if (strict) "" else "IF NOT EXISTS ") + |
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ident + " " + enclosure(columns.map(_.decl(sql_type)) ::: primary_key) |
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} |
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def create_index(index_name: String, index_columns: List[Column], |
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strict: Boolean = false, unique: Boolean = false): Source = |
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"CREATE " + (if (unique) "UNIQUE " else "") + "INDEX " + |
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(if (strict) "" else "IF NOT EXISTS ") + SQL.ident(index_name) + " ON " + |
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ident + " " + enclosure(index_columns.map(_.name)) |
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def insert_cmd(cmd: Source, sql: Source = ""): Source = |
65703
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
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cmd + " INTO " + ident + " VALUES " + enclosure(columns.map(_ => "?")) + |
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(if (sql == "") "" else " " + sql) |
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def insert(sql: Source = ""): Source = insert_cmd("INSERT", sql) |
65703
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
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def delete(sql: Source = ""): Source = |
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"DELETE FROM " + ident + |
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(if (sql == "") "" else " " + sql) |
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def select( |
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select_columns: List[Column] = Nil, sql: Source = "", distinct: Boolean = false): Source = |
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SQL.select(select_columns, distinct = distinct) + ident + |
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(if (sql == "") "" else " " + sql) |
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override def toString: Source = ident |
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} |
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/** SQL database operations **/ |
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/* statements */ |
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class Statement private[SQL](val db: Database, val rep: PreparedStatement) |
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{ |
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stmt => |
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object bool |
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{ |
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def update(i: Int, x: Boolean) { rep.setBoolean(i, x) } |
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def update(i: Int, x: Option[Boolean]) |
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{ |
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if (x.isDefined) update(i, x.get) |
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else rep.setNull(i, java.sql.Types.BOOLEAN) |
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} |
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} |
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object int |
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{ |
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def update(i: Int, x: Int) { rep.setInt(i, x) } |
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def update(i: Int, x: Option[Int]) |
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{ |
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if (x.isDefined) update(i, x.get) |
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else rep.setNull(i, java.sql.Types.INTEGER) |
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} |
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} |
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object long |
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{ |
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def update(i: Int, x: Long) { rep.setLong(i, x) } |
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def update(i: Int, x: Option[Long]) |
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{ |
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if (x.isDefined) update(i, x.get) |
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else rep.setNull(i, java.sql.Types.BIGINT) |
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} |
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} |
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object double |
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{ |
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def update(i: Int, x: Double) { rep.setDouble(i, x) } |
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def update(i: Int, x: Option[Double]) |
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{ |
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if (x.isDefined) update(i, x.get) |
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else rep.setNull(i, java.sql.Types.DOUBLE) |
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} |
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} |
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object string |
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{ |
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def update(i: Int, x: String) { rep.setString(i, x) } |
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def update(i: Int, x: Option[String]): Unit = update(i, x.orNull) |
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} |
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object bytes |
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{ |
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def update(i: Int, bytes: Bytes) |
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{ |
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if (bytes == null) rep.setBytes(i, null) |
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else rep.setBinaryStream(i, bytes.stream(), bytes.length) |
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} |
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def update(i: Int, bytes: Option[Bytes]): Unit = update(i, bytes.orNull) |
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} |
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object date |
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{ |
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def update(i: Int, date: Date): Unit = db.update_date(stmt, i, date) |
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def update(i: Int, date: Option[Date]): Unit = update(i, date.orNull) |
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} |
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def execute(): Boolean = rep.execute() |
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def execute_query(): Result = new Result(this, rep.executeQuery()) |
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def close(): Unit = rep.close |
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} |
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/* results */ |
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class Result private[SQL](val stmt: Statement, val rep: ResultSet) |
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{ |
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res => |
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def next(): Boolean = rep.next() |
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def iterator[A](get: Result => A): Iterator[A] = new Iterator[A] |
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{ |
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private var _next: Boolean = res.next() |
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def hasNext: Boolean = _next |
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def next: A = { val x = get(res); _next = res.next(); x } |
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} |
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def bool(column: Column): Boolean = rep.getBoolean(column.name) |
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def int(column: Column): Int = rep.getInt(column.name) |
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def long(column: Column): Long = rep.getLong(column.name) |
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def double(column: Column): Double = rep.getDouble(column.name) |
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def string(column: Column): String = |
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{ |
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val s = rep.getString(column.name) |
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if (s == null) "" else s |
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} |
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def bytes(column: Column): Bytes = |
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{ |
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val bs = rep.getBytes(column.name) |
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if (bs == null) Bytes.empty else Bytes(bs) |
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} |
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def date(column: Column): Date = stmt.db.date(res, column) |
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def timing(c1: Column, c2: Column, c3: Column) = |
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Timing(Time.ms(long(c1)), Time.ms(long(c2)), Time.ms(long(c3))) |
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def get[A](column: Column, f: Column => A): Option[A] = |
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{ |
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val x = f(column) |
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if (rep.wasNull) None else Some(x) |
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} |
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def get_bool(column: Column): Option[Boolean] = get(column, bool _) |
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def get_int(column: Column): Option[Int] = get(column, int _) |
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def get_long(column: Column): Option[Long] = get(column, long _) |
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def get_double(column: Column): Option[Double] = get(column, double _) |
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def get_string(column: Column): Option[String] = get(column, string _) |
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def get_bytes(column: Column): Option[Bytes] = get(column, bytes _) |
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def get_date(column: Column): Option[Date] = get(column, date _) |
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} |
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/* database */ |
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65006 | 303 |
trait Database |
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{ |
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db => |
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/* types */ |
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65730 | 310 |
def sql_type(T: Type.Value): Source |
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/* connection */ |
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def connection: Connection |
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def close() { connection.close } |
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def transaction[A](body: => A): A = |
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{ |
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val auto_commit = connection.getAutoCommit |
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try { |
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connection.setAutoCommit(false) |
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val savepoint = connection.setSavepoint |
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try { |
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val result = body |
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connection.commit |
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result |
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} |
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catch { case exn: Throwable => connection.rollback(savepoint); throw exn } |
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} |
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finally { connection.setAutoCommit(auto_commit) } |
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} |
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/* statements and results */ |
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def statement(sql: Source): Statement = |
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new Statement(db, connection.prepareStatement(sql)) |
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def using_statement[A](sql: Source)(f: Statement => A): A = |
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using(statement(sql))(f) |
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def update_date(stmt: Statement, i: Int, date: Date): Unit |
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def date(res: Result, column: Column): Date |
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def insert_permissive(table: Table, sql: Source = ""): Source |
65703
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
|
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65006 | 349 |
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65669 | 350 |
/* tables and views */ |
65006 | 351 |
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def tables: List[String] = |
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{ |
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val result = new mutable.ListBuffer[String] |
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val rs = connection.getMetaData.getTables(null, null, "%", null) |
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356 |
while (rs.next) { result += rs.getString(3) } |
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357 |
result.toList |
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358 |
} |
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65006 | 359 |
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def create_table(table: Table, strict: Boolean = false, sql: Source = ""): Unit = |
65698 | 361 |
using_statement( |
362 |
table.create(strict, sql_type) + (if (sql == "") "" else " " + sql))(_.execute()) |
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65006 | 363 |
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65018 | 364 |
def create_index(table: Table, name: String, columns: List[Column], |
65280 | 365 |
strict: Boolean = false, unique: Boolean = false): Unit = |
65698 | 366 |
using_statement(table.create_index(name, columns, strict, unique))(_.execute()) |
65006 | 367 |
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65691 | 368 |
def create_view(table: Table, strict: Boolean = false): Unit = |
369 |
{ |
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370 |
if (strict || !tables.contains(table.name)) { |
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65731 | 371 |
val sql = "CREATE VIEW " + table + " AS " + { table.query; table.body } |
65698 | 372 |
using_statement(sql)(_.execute()) |
65690 | 373 |
} |
65691 | 374 |
} |
65006 | 375 |
} |
63778 | 376 |
} |
65006 | 377 |
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378 |
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379 |
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380 |
/** SQLite **/ |
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381 |
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382 |
object SQLite |
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383 |
{ |
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65021 | 384 |
// see https://www.sqlite.org/lang_datefunc.html |
385 |
val date_format: Date.Format = Date.Format("uuuu-MM-dd HH:mm:ss.SSS x") |
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65292
e3bd1e7ddd23
more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
wenzelm
parents:
65280
diff
changeset
|
387 |
lazy val init_jdbc: Unit = Class.forName("org.sqlite.JDBC") |
e3bd1e7ddd23
more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
wenzelm
parents:
65280
diff
changeset
|
388 |
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65006 | 389 |
def open_database(path: Path): Database = |
390 |
{ |
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65292
e3bd1e7ddd23
more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
wenzelm
parents:
65280
diff
changeset
|
391 |
init_jdbc |
65006 | 392 |
val path0 = path.expand |
393 |
val s0 = File.platform_path(path0) |
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394 |
val s1 = if (Platform.is_windows) s0.replace('\\', '/') else s0 |
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395 |
val connection = DriverManager.getConnection("jdbc:sqlite:" + s1) |
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65007 | 396 |
new Database(path0.toString, connection) |
65006 | 397 |
} |
398 |
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65007 | 399 |
class Database private[SQLite](name: String, val connection: Connection) extends SQL.Database |
65006 | 400 |
{ |
65007 | 401 |
override def toString: String = name |
65006 | 402 |
|
65730 | 403 |
def sql_type(T: SQL.Type.Value): SQL.Source = SQL.sql_type_sqlite(T) |
65011 | 404 |
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65748 | 405 |
def update_date(stmt: SQL.Statement, i: Int, date: Date): Unit = |
406 |
if (date == null) stmt.string(i) = (null: String) |
|
407 |
else stmt.string(i) = date_format(date) |
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65598 | 408 |
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65740 | 409 |
def date(res: SQL.Result, column: SQL.Column): Date = |
410 |
date_format.parse(res.string(column)) |
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65021 | 411 |
|
65730 | 412 |
def insert_permissive(table: SQL.Table, sql: SQL.Source = ""): SQL.Source = |
65703
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
|
413 |
table.insert_cmd("INSERT OR IGNORE", sql = sql) |
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
|
414 |
|
65698 | 415 |
def rebuild { using_statement("VACUUM")(_.execute()) } |
65006 | 416 |
} |
417 |
} |
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/** PostgreSQL **/ |
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object PostgreSQL |
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{ |
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val default_port = 5432 |
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more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
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parents:
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lazy val init_jdbc: Unit = Class.forName("org.postgresql.Driver") |
e3bd1e7ddd23
more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
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parents:
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changeset
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def open_database( |
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user: String, |
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password: String, |
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database: String = "", |
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host: String = "", |
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65594 | 434 |
port: Int = 0, |
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parents:
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changeset
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ssh: Option[SSH.Session] = None, |
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ssh_close for proper termination after use of database;
wenzelm
parents:
65620
diff
changeset
|
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ssh_close: Boolean = false): Database = |
65006 | 437 |
{ |
65292
e3bd1e7ddd23
more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
wenzelm
parents:
65280
diff
changeset
|
438 |
init_jdbc |
e3bd1e7ddd23
more robust JDBC initialization, e.g. required for Isabelle/jEdit startup;
wenzelm
parents:
65280
diff
changeset
|
439 |
|
65641 | 440 |
if (user == "") error("Undefined database user") |
65009 | 441 |
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65717 | 442 |
val db_host = proper_string(host) getOrElse "localhost" |
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val db_port = if (port > 0 && port != default_port) ":" + port else "" |
65717 | 444 |
val db_name = "/" + (proper_string(database) getOrElse user) |
65009 | 445 |
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65010 | 446 |
val (url, name, port_forwarding) = |
65009 | 447 |
ssh match { |
65010 | 448 |
case None => |
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val spec = db_host + db_port + db_name |
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val url = "jdbc:postgresql://" + spec |
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val name = user + "@" + spec |
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(url, name, None) |
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65009 | 453 |
case Some(ssh) => |
65594 | 454 |
val fw = |
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ssh.port_forwarding(remote_host = db_host, |
|
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ssh_close for proper termination after use of database;
wenzelm
parents:
65620
diff
changeset
|
456 |
remote_port = if (port > 0) port else default_port, |
df804cdba5f9
ssh_close for proper termination after use of database;
wenzelm
parents:
65620
diff
changeset
|
457 |
ssh_close = ssh_close) |
65010 | 458 |
val url = "jdbc:postgresql://localhost:" + fw.local_port + db_name |
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val name = user + "@" + fw + db_name + " via ssh " + ssh |
|
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(url, name, Some(fw)) |
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65009 | 461 |
} |
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try { |
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65010 | 463 |
val connection = DriverManager.getConnection(url, user, password) |
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new Database(name, connection, port_forwarding) |
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65009 | 465 |
} |
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catch { case exn: Throwable => port_forwarding.foreach(_.close); throw exn } |
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65006 | 467 |
} |
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class Database private[PostgreSQL]( |
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name: String, val connection: Connection, port_forwarding: Option[SSH.Port_Forwarding]) |
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extends SQL.Database |
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65006 | 472 |
{ |
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override def toString: String = name |
65008 | 474 |
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65730 | 475 |
def sql_type(T: SQL.Type.Value): SQL.Source = SQL.sql_type_postgresql(T) |
65009 | 476 |
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65021 | 477 |
// see https://jdbc.postgresql.org/documentation/head/8-date-time.html |
65748 | 478 |
def update_date(stmt: SQL.Statement, i: Int, date: Date): Unit = |
65740 | 479 |
if (date == null) stmt.rep.setObject(i, null) |
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else stmt.rep.setObject(i, OffsetDateTime.from(date.to_utc.rep)) |
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65598 | 481 |
|
65740 | 482 |
def date(res: SQL.Result, column: SQL.Column): Date = |
65704 | 483 |
{ |
65740 | 484 |
val obj = res.rep.getObject(column.name, classOf[OffsetDateTime]) |
65704 | 485 |
if (obj == null) null else Date.instant(obj.toInstant) |
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} |
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65021 | 487 |
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65730 | 488 |
def insert_permissive(table: SQL.Table, sql: SQL.Source = ""): SQL.Source = |
65703
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more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
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489 |
table.insert_cmd("INSERT", |
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
|
490 |
sql = sql + (if (sql == "") "" else " ") + "ON CONFLICT DO NOTHING") |
cead65c19f2e
more direct insert_permissive statement, which avoids somewhat fragile nested transactions;
wenzelm
parents:
65702
diff
changeset
|
491 |
|
65009 | 492 |
override def close() { super.close; port_forwarding.foreach(_.close) } |
65006 | 493 |
} |
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} |