org.h2.command.dml.Query.getExpressions()方法的使用及代码示例

x33g5p2x  于2022-01-28 转载在 其他  
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本文整理了Java中org.h2.command.dml.Query.getExpressions方法的一些代码示例，展示了Query.getExpressions的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Query.getExpressions方法的具体详情如下：
包路径：org.h2.command.dml.Query
类名称：Query
方法名：getExpressions

Query.getExpressions介绍

[英]The the list of select expressions. This may include invisible expressions such as order by expressions.
[中]选择表达式的列表。这可能包括不可见的表达式，如按顺序表达式。

代码示例

代码示例来源：origin: com.h2database/h2

private Expression getExpression() {
  if (expression == null) {
    ArrayList<Expression> expressions = query.getExpressions();
    int columnCount = query.getColumnCount();
    if (columnCount == 1) {
      expression = expressions.get(0);
    } else {
      Expression[] list = new Expression[columnCount];
      for (int i = 0; i < columnCount; i++) {
        list[i] = expressions.get(i);
      }
      expression = new ExpressionList(list);
    }
  }
  return expression;
}

代码示例来源：origin: com.h2database/h2

ArrayList<Expression> withExpressions = theQuery.getExpressions();
for (int i = 0; i < withExpressions.size(); ++i) {
  Expression columnExp = withExpressions.get(i);

代码示例来源：origin: com.h2database/h2

@Override
public void init() {
  if (SysProperties.CHECK && checkInit) {
    DbException.throwInternalError();
  }
  checkInit = true;
  left.init();
  right.init();
  int len = left.getColumnCount();
  if (len != right.getColumnCount()) {
    throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
  }
  ArrayList<Expression> le = left.getExpressions();
  // set the expressions to get the right column count and names,
  // but can't validate at this time
  expressions = New.arrayList();
  for (int i = 0; i < len; i++) {
    Expression l = le.get(i);
    expressions.add(l);
  }
}

代码示例来源：origin: com.h2database/h2

ArrayList<Expression> le = left.getExpressions();
ArrayList<Expression> re = right.getExpressions();
ColumnNamer columnNamer= new ColumnNamer(session);
for (int i = 0; i < len; i++) {

代码示例来源：origin: apache/ignite

/**
 * @param qry Query.
 * @param expCol Expression column.
 * @param validate Query validation flag.
 * @return {@code true} It it is an affinity column.
 */
private static boolean isAffinityColumn(Query qry, ExpressionColumn expCol, boolean validate) {
  if (qry.isUnion()) {
    SelectUnion union = (SelectUnion)qry;
    return isAffinityColumn(union.getLeft(), expCol, validate) && isAffinityColumn(union.getRight(), expCol, validate);
  }
  Expression exp = qry.getExpressions().get(expCol.getColumn().getColumnId()).getNonAliasExpression();
  if (exp instanceof ExpressionColumn) {
    expCol = (ExpressionColumn)exp;
    return isAffinityColumn(expCol.getTableFilter(), expCol, validate);
  }
  return false;
}

代码示例来源：origin: com.h2database/h2

private void generateColumnsFromQuery() {
  int columnCount = asQuery.getColumnCount();
  ArrayList<Expression> expressions = asQuery.getExpressions();
  ColumnNamer columnNamer= new ColumnNamer(session);
  for (int i = 0; i < columnCount; i++) {

代码示例来源：origin: com.h2database/h2

this.querySQL = compiledQuery.getPlanSQL();
tables = new ArrayList<>(compiledQuery.getTables());
ArrayList<Expression> expressions = compiledQuery.getExpressions();
ArrayList<Column> list = New.arrayList();
ColumnNamer columnNamer = new ColumnNamer(session);

代码示例来源：origin: com.h2database/com.springsource.org.h2

private Expression getExpression() {
  return (Expression) query.getExpressions().get(0);
}

代码示例来源：origin: com.eventsourcing/h2

private Expression getExpression() {
  if (expression == null) {
    ArrayList<Expression> expressions = query.getExpressions();
    int columnCount = query.getColumnCount();
    if (columnCount == 1) {
      expression = expressions.get(0);
    } else {
      Expression[] list = new Expression[columnCount];
      for (int i = 0; i < columnCount; i++) {
        list[i] = expressions.get(i);
      }
      expression = new ExpressionList(list);
    }
  }
  return expression;
}

代码示例来源：origin: org.wowtools/h2

private Expression getExpression() {
  if (expression == null) {
    ArrayList<Expression> expressions = query.getExpressions();
    int columnCount = query.getColumnCount();
    if (columnCount == 1) {
      expression = expressions.get(0);
    } else {
      Expression[] list = new Expression[columnCount];
      for (int i = 0; i < columnCount; i++) {
        list[i] = expressions.get(i);
      }
      expression = new ExpressionList(list);
    }
  }
  return expression;
}

代码示例来源：origin: com.h2database/com.springsource.org.h2

public LocalResult queryMeta() throws SQLException {
  ObjectArray expressions = left.getExpressions();
  int columnCount = left.getColumnCount();
  LocalResult result = new LocalResult(session, expressions, columnCount);
  result.done();
  return result;
}

代码示例来源：origin: org.wowtools/h2

@Override
public void init() {
  if (SysProperties.CHECK && checkInit) {
    DbException.throwInternalError();
  }
  checkInit = true;
  left.init();
  right.init();
  int len = left.getColumnCount();
  if (len != right.getColumnCount()) {
    throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
  }
  ArrayList<Expression> le = left.getExpressions();
  // set the expressions to get the right column count and names,
  // but can't validate at this time
  expressions = New.arrayList();
  for (int i = 0; i < len; i++) {
    Expression l = le.get(i);
    expressions.add(l);
  }
}

代码示例来源：origin: com.eventsourcing/h2

@Override
public void init() {
  if (SysProperties.CHECK && checkInit) {
    DbException.throwInternalError();
  }
  checkInit = true;
  left.init();
  right.init();
  int len = left.getColumnCount();
  if (len != right.getColumnCount()) {
    throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
  }
  ArrayList<Expression> le = left.getExpressions();
  // set the expressions to get the right column count and names,
  // but can't validate at this time
  expressions = New.arrayList();
  for (int i = 0; i < len; i++) {
    Expression l = le.get(i);
    expressions.add(l);
  }
}

代码示例来源：origin: com.eventsourcing/h2

ArrayList<Expression> le = left.getExpressions();
ArrayList<Expression> re = right.getExpressions();
for (int i = 0; i < len; i++) {
  Expression l = le.get(i);

代码示例来源：origin: org.apache.ignite/ignite-indexing

/**
 * @param qry Query.
 * @param expCol Expression column.
 * @param validate Query validation flag.
 * @return {@code true} It it is an affinity column.
 */
private static boolean isAffinityColumn(Query qry, ExpressionColumn expCol, boolean validate) {
  if (qry.isUnion()) {
    SelectUnion union = (SelectUnion)qry;
    return isAffinityColumn(union.getLeft(), expCol, validate) && isAffinityColumn(union.getRight(), expCol, validate);
  }
  Expression exp = qry.getExpressions().get(expCol.getColumn().getColumnId()).getNonAliasExpression();
  if (exp instanceof ExpressionColumn) {
    expCol = (ExpressionColumn)exp;
    return isAffinityColumn(expCol.getTableFilter(), expCol, validate);
  }
  return false;
}

代码示例来源：origin: org.wowtools/h2

private void generateColumnsFromQuery() {
  int columnCount = asQuery.getColumnCount();
  ArrayList<Expression> expressions = asQuery.getExpressions();
  for (int i = 0; i < columnCount; i++) {
    Expression expr = expressions.get(i);
    int type = expr.getType();
    String name = expr.getAlias();
    long precision = expr.getPrecision();
    int displaySize = expr.getDisplaySize();
    DataType dt = DataType.getDataType(type);
    if (precision > 0 && (dt.defaultPrecision == 0 ||
        (dt.defaultPrecision > precision && dt.defaultPrecision < Byte.MAX_VALUE))) {
      // dont' set precision to MAX_VALUE if this is the default
      precision = dt.defaultPrecision;
    }
    int scale = expr.getScale();
    if (scale > 0 && (dt.defaultScale == 0 ||
        (dt.defaultScale > scale && dt.defaultScale < precision))) {
      scale = dt.defaultScale;
    }
    if (scale > precision) {
      precision = scale;
    }
    Column col = new Column(name, type, precision, scale, displaySize);
    addColumn(col);
  }
}

代码示例来源：origin: com.eventsourcing/h2

private void generateColumnsFromQuery() {
  int columnCount = asQuery.getColumnCount();
  ArrayList<Expression> expressions = asQuery.getExpressions();
  for (int i = 0; i < columnCount; i++) {
    Expression expr = expressions.get(i);
    int type = expr.getType();
    String name = expr.getAlias();
    long precision = expr.getPrecision();
    int displaySize = expr.getDisplaySize();
    DataType dt = DataType.getDataType(type);
    if (precision > 0 && (dt.defaultPrecision == 0 ||
        (dt.defaultPrecision > precision && dt.defaultPrecision < Byte.MAX_VALUE))) {
      // dont' set precision to MAX_VALUE if this is the default
      precision = dt.defaultPrecision;
    }
    int scale = expr.getScale();
    if (scale > 0 && (dt.defaultScale == 0 ||
        (dt.defaultScale > scale && dt.defaultScale < precision))) {
      scale = dt.defaultScale;
    }
    if (scale > precision) {
      precision = scale;
    }
    Column col = new Column(name, type, precision, scale, displaySize);
    addColumn(col);
  }
}

代码示例来源：origin: com.h2database/com.springsource.org.h2

public void init() throws SQLException {
  if (SysProperties.CHECK && checkInit) {
    throw Message.getInternalError();
  }
  checkInit = true;
  left.init();
  right.init();
  int len = left.getColumnCount();
  if (len != right.getColumnCount()) {
    throw Message.getSQLException(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
  }
  ObjectArray le = left.getExpressions();
  // set the expressions to get the right column count and names,
  // but can't validate at this time
  expressions = new ObjectArray();
  for (int i = 0; i < len; i++) {
    Expression l = (Expression) le.get(i);
    expressions.add(l);
  }
}

代码示例来源：origin: com.h2database/com.springsource.org.h2

ObjectArray le = left.getExpressions();
ObjectArray re = right.getExpressions();
for (int i = 0; i < len; i++) {
  Expression l = (Expression) le.get(i);

代码示例来源：origin: com.h2database/com.springsource.org.h2

private void generateColumnFromQuery() throws SQLException {
  int columnCount = asQuery.getColumnCount();
  ObjectArray expressions = asQuery.getExpressions();
  for (int i = 0; i < columnCount; i++) {
    Expression expr = (Expression) expressions.get(i);
    int type = expr.getType();
    String name = expr.getColumnName();
    long precision = expr.getPrecision();
    int displaySize = expr.getDisplaySize();
    DataType dt = DataType.getDataType(type);
    if (precision > 0 && (dt.defaultPrecision == 0 || (dt.defaultPrecision > precision && dt.defaultPrecision < Byte.MAX_VALUE))) {
      // dont' set precision to MAX_VALUE if this is the default
      precision = dt.defaultPrecision;
    }
    int scale = expr.getScale();
    if (scale > 0 && (dt.defaultScale == 0 || dt.defaultScale > scale)) {
      scale = dt.defaultScale;
    }
    Column col = new Column(name, type, precision, scale, displaySize);
    addColumn(col);
  }
}

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