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lookup support use IN (#1050)
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cooper-lzy committed Oct 12, 2021
1 parent 6463662 commit 3f62909
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Expand Up @@ -124,20 +124,3 @@ nebula> CREATE TAG INDEX player_index_1 on player(name(10), age);
!!! caution

不支持跨Tag或Edge type创建复合索引。

复合属性索引被(`LOOKUP` 或者 `MATCH`)使用时,遵循"最左匹配原则",必须从复合属性索引的最左侧开始匹配。请参见下方示例。

```ngql
# 为Tag t的前三个属性创建复合属性索引。
nebula> CREATE TAG INDEX example_index ON t(p1, p2, p3);
# 注意:无法匹配到索引,因为不是从p1开始。
nebula> LOOKUP ON t WHERE p2 == 1 and p3 == 1;
# 可以匹配到索引。
nebula> LOOKUP ON t WHERE p1 == 1;
# 可以匹配到索引,因为p1和p2是连续的。
nebula> LOOKUP ON t WHERE p1 == 1 and p2 == 1;
# 可以匹配到索引,因为p1、p2、p3是连续的。
nebula> LOOKUP ON t WHERE p1 == 1 and p2 == 1 and p3 == 1;
```
4 changes: 0 additions & 4 deletions docs-2.0/3.ngql-guide/14.native-index-statements/README.md
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Expand Up @@ -12,10 +12,6 @@ Nebula Graph支持两种类型索引:原生索引和全文索引。

- 支持创建同一个Tag或Edge type的多个属性的索引(复合索引),但是不能跨Tag或Edge type。

- 复合索引可以实现部分匹配检索,遵循最左匹配原则。详情请参见[LOOKUP FAQ](../7.general-query-statements/5.lookup.md#faq)

- [LOOKUP](../7.general-query-statements/5.lookup.md)不支持`CONTAINS``STARTS WITH`等字符串操作符。

### 原生索引操作

- [CREATE INDEX](1.create-native-index.md)
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54 changes: 38 additions & 16 deletions docs-2.0/3.ngql-guide/7.general-query-statements/5.lookup.md
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Expand Up @@ -56,8 +56,8 @@ LOOKUP ON {<vertex_tag> | <edge_type>}
- `$-``$^`
- 在关系表达式中,不支持运算符两边都有字段名,例如`tagName.prop1 > tagName.prop2`
- 不支持运算表达式和函数表达式中嵌套AliasProp表达式。
- 字符串类型索引不支持范围扫描。
- 不支持XOR和NOT运算符。
- 不支持除`STARTS WITH`之外的字符串操作。

## 检索点

Expand All @@ -75,31 +75,53 @@ nebula> REBUILD TAG INDEX index_player;
nebula> LOOKUP ON player \
WHERE player.name == "Tony Parker";
============
| VertexID |
============
| 101 |
------------
+-------------+
| VertexID |
+-------------+
| "player101" |
+-------------+
nebula> LOOKUP ON player \
WHERE player.name == "Tony Parker" \
YIELD player.name, player.age;
=======================================
| VertexID | player.name | player.age |
=======================================
| 101 | Tony Parker | 36 |
---------------------------------------
+-------------+---------------+------------+
| VertexID | player.name | player.age |
+-------------+---------------+------------+
| "player101" | "Tony Parker" | 36 |
+-------------+---------------+------------+
nebula> LOOKUP ON player \
WHERE player.age > 45;
+-------------+
| VertexID |
+-------------+
| "player144" |
+-------------+
| "player140" |
+-------------+
nebula> LOOKUP ON player \
WHERE player.name STARTS WITH "B" \
AND player.age IN [22,30] \
YIELD player.name, player.age;
+-------------+-----------------+------------+
| VertexID | player.name | player.age |
+-------------+-----------------+------------+
| "player149" | "Ben Simmons" | 22 |
+-------------+-----------------+------------+
| "player134" | "Blake Griffin" | 30 |
+-------------+-----------------+------------+
nebula> LOOKUP ON player \
WHERE player.name == "Kobe Bryant" \
YIELD player.name AS name |\
GO FROM $-.VertexID OVER serve \
YIELD $-.name, serve.start_year, serve.end_year, $$.team.name;
==================================================================
| $-.name | serve.start_year | serve.end_year | $$.team.name |
==================================================================
| Kobe Bryant | 1996 | 2016 | Lakers |
------------------------------------------------------------------
+---------------+------------------+----------------+--------------+
| $-.name | serve.start_year | serve.end_year | $$.team.name |
+---------------+------------------+----------------+--------------+
| "Kobe Bryant" | 1996 | 2016 | "Lakers" |
+---------------+------------------+----------------+--------------+
```

## 检索边
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