org.h2.command.dml.Query.isUnion()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.isUnion方法的一些代码示例，展示了Query.isUnion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.isUnion方法的具体详情如下：
包路径：org.h2.command.dml.Query
类名称：Query
方法名：isUnion

Query.isUnion介绍

[英]Check if this is a UNION query.
[中]检查这是否是联合查询。

代码示例

代码示例来源：origin: com.h2database/h2

  1. private boolean collectJoinBatches(Query query) {
  2.   if (query.isUnion()) {
  3.     SelectUnion union = (SelectUnion) query;
  4.     return collectJoinBatches(union.getLeft()) &&
  5.         collectJoinBatches(union.getRight());
  6.   }
  7.   Select select = (Select) query;
  8.   JoinBatch jb = select.getJoinBatch();
  9.   if (jb == null) {
  10.     onlyBatchedQueries = false;
  11.   } else {
  12.     if (jb.getLookupBatch(0) == null) {
  13.       // we are top sub-query
  14.       return false;
  15.     }
  16.     assert !jb.batchedSubQuery;
  17.     jb.batchedSubQuery = true;
  18.     if (joinBatches == null) {
  19.       joinBatches = New.arrayList();
  20.       filters = New.arrayList();
  21.     }
  22.     filters.add(jb.filters[0]);
  23.     joinBatches.add(jb);
  24.   }
  25.   return true;
  26. }

代码示例来源：origin: com.h2database/h2

  1. /**
  2.  * Create index lookup batch for a view index.
  3.  *
  4.  * @param viewIndex view index
  5.  * @return index lookup batch or {@code null} if batching is not supported
  6.  *         for this query
  7.  */
  8. public static IndexLookupBatch createViewIndexLookupBatch(ViewIndex viewIndex) {
  9.   Query query = viewIndex.getQuery();
  10.   if (query.isUnion()) {
  11.     ViewIndexLookupBatchUnion unionBatch = new ViewIndexLookupBatchUnion(viewIndex);
  12.     return unionBatch.initialize() ? unionBatch : null;
  13.   }
  14.   JoinBatch jb = ((Select) query).getJoinBatch();
  15.   if (jb == null || jb.getLookupBatch(0) == null) {
  16.     // our sub-query is not batched or is top batched sub-query
  17.     return null;
  18.   }
  19.   assert !jb.batchedSubQuery;
  20.   jb.batchedSubQuery = true;
  21.   return jb.viewIndexLookupBatch(viewIndex);
  22. }

代码示例来源：origin: apache/ignite

  1. List<CollocationModel> unions,
  2. boolean validate) {
  3. if (qry.isUnion()) {
  4.   if (unions == null)
  5.     unions = new ArrayList<>();

代码示例来源：origin: apache/ignite

  1. /**
  2.  * @param qry Query.
  3.  * @param expCol Expression column.
  4.  * @param validate Query validation flag.
  5.  * @return {@code true} It it is an affinity column.
  6.  */
  7. private static boolean isAffinityColumn(Query qry, ExpressionColumn expCol, boolean validate) {
  8.   if (qry.isUnion()) {
  9.     SelectUnion union = (SelectUnion)qry;
  10.     return isAffinityColumn(union.getLeft(), expCol, validate) && isAffinityColumn(union.getRight(), expCol, validate);
  11.   }
  12.   Expression exp = qry.getExpressions().get(expCol.getColumn().getColumnId()).getNonAliasExpression();
  13.   if (exp instanceof ExpressionColumn) {
  14.     expCol = (ExpressionColumn)exp;
  15.     return isAffinityColumn(expCol.getTableFilter(), expCol, validate);
  16.   }
  17.   return false;
  18. }

代码示例来源：origin: com.h2database/h2

  1. if (isUnion()) {

代码示例来源：origin: com.h2database/h2

  1. query.setNeverLazy(true);
  2. if (!query.isUnion()) {
  3.   throw DbException.get(ErrorCode.SYNTAX_ERROR_2,
  4.       "recursive queries without UNION");

代码示例来源：origin: org.wowtools/h2

  1. private boolean collectJoinBatches(Query query) {
  2.   if (query.isUnion()) {
  3.     SelectUnion union = (SelectUnion) query;
  4.     return collectJoinBatches(union.getLeft()) &&
  5.         collectJoinBatches(union.getRight());
  6.   }
  7.   Select select = (Select) query;
  8.   JoinBatch jb = select.getJoinBatch();
  9.   if (jb == null) {
  10.     onlyBatchedQueries = false;
  11.   } else {
  12.     if (jb.getLookupBatch(0) == null) {
  13.       // we are top sub-query
  14.       return false;
  15.     }
  16.     assert !jb.batchedSubQuery;
  17.     jb.batchedSubQuery = true;
  18.     if (joinBatches == null) {
  19.       joinBatches = New.arrayList();
  20.       filters = New.arrayList();
  21.     }
  22.     filters.add(jb.filters[0]);
  23.     joinBatches.add(jb);
  24.   }
  25.   return true;
  26. }

代码示例来源：origin: com.eventsourcing/h2

  1. private boolean collectJoinBatches(Query query) {
  2.   if (query.isUnion()) {
  3.     SelectUnion union = (SelectUnion) query;
  4.     return collectJoinBatches(union.getLeft()) &&
  5.         collectJoinBatches(union.getRight());
  6.   }
  7.   Select select = (Select) query;
  8.   JoinBatch jb = select.getJoinBatch();
  9.   if (jb == null) {
  10.     onlyBatchedQueries = false;
  11.   } else {
  12.     if (jb.getLookupBatch(0) == null) {
  13.       // we are top sub-query
  14.       return false;
  15.     }
  16.     assert !jb.batchedSubQuery;
  17.     jb.batchedSubQuery = true;
  18.     if (joinBatches == null) {
  19.       joinBatches = New.arrayList();
  20.       filters = New.arrayList();
  21.     }
  22.     filters.add(jb.filters[0]);
  23.     joinBatches.add(jb);
  24.   }
  25.   return true;
  26. }

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

  1. List<GridH2CollocationModel> unions,
  2. boolean validate) {
  3. if (qry.isUnion()) {
  4.   if (unions == null)
  5.     unions = new ArrayList<>();

代码示例来源：origin: com.eventsourcing/h2

  1. /**
  2.  * Create index lookup batch for a view index.
  3.  *
  4.  * @param viewIndex view index
  5.  * @return index lookup batch or {@code null} if batching is not supported
  6.  *         for this query
  7.  */
  8. public static IndexLookupBatch createViewIndexLookupBatch(ViewIndex viewIndex) {
  9.   Query query = viewIndex.getQuery();
  10.   if (query.isUnion()) {
  11.     ViewIndexLookupBatchUnion unionBatch = new ViewIndexLookupBatchUnion(viewIndex);
  12.     return unionBatch.initialize() ? unionBatch : null;
  13.   }
  14.   JoinBatch jb = ((Select) query).getJoinBatch();
  15.   if (jb == null || jb.getLookupBatch(0) == null) {
  16.     // our sub-query is not batched or is top batched sub-query
  17.     return null;
  18.   }
  19.   assert !jb.batchedSubQuery;
  20.   jb.batchedSubQuery = true;
  21.   return jb.viewIndexLookupBatch(viewIndex);
  22. }

代码示例来源：origin: org.wowtools/h2

  1. /**
  2.  * Create index lookup batch for a view index.
  3.  *
  4.  * @param viewIndex view index
  5.  * @return index lookup batch or {@code null} if batching is not supported
  6.  *         for this query
  7.  */
  8. public static IndexLookupBatch createViewIndexLookupBatch(ViewIndex viewIndex) {
  9.   Query query = viewIndex.getQuery();
  10.   if (query.isUnion()) {
  11.     ViewIndexLookupBatchUnion unionBatch = new ViewIndexLookupBatchUnion(viewIndex);
  12.     return unionBatch.initialize() ? unionBatch : null;
  13.   }
  14.   JoinBatch jb = ((Select) query).getJoinBatch();
  15.   if (jb == null || jb.getLookupBatch(0) == null) {
  16.     // our sub-query is not batched or is top batched sub-query
  17.     return null;
  18.   }
  19.   assert !jb.batchedSubQuery;
  20.   jb.batchedSubQuery = true;
  21.   return jb.viewIndexLookupBatch(viewIndex);
  22. }

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

  1. /**
  2.  * @param qry Query.
  3.  * @param expCol Expression column.
  4.  * @param validate Query validation flag.
  5.  * @return {@code true} It it is an affinity column.
  6.  */
  7. private static boolean isAffinityColumn(Query qry, ExpressionColumn expCol, boolean validate) {
  8.   if (qry.isUnion()) {
  9.     SelectUnion union = (SelectUnion)qry;
  10.     return isAffinityColumn(union.getLeft(), expCol, validate) && isAffinityColumn(union.getRight(), expCol, validate);
  11.   }
  12.   Expression exp = qry.getExpressions().get(expCol.getColumn().getColumnId()).getNonAliasExpression();
  13.   if (exp instanceof ExpressionColumn) {
  14.     expCol = (ExpressionColumn)exp;
  15.     return isAffinityColumn(expCol.getTableFilter(), expCol, validate);
  16.   }
  17.   return false;
  18. }

代码示例来源：origin: org.wowtools/h2

  1. query = (Query) parser.prepare(querySQL);
  2. if (!query.isUnion()) {
  3.   throw DbException.get(ErrorCode.SYNTAX_ERROR_2,
  4.       "recursive queries without UNION ALL");

代码示例来源：origin: com.eventsourcing/h2

  1. query = (Query) parser.prepare(querySQL);
  2. if (!query.isUnion()) {
  3.   throw DbException.get(ErrorCode.SYNTAX_ERROR_2,
  4.       "recursive queries without UNION ALL");

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