From cff1e63ea07436a4013b950be601b42612777c73 Mon Sep 17 00:00:00 2001 From: Abby <78209557+abby-cyber@users.noreply.github.com> Date: Sun, 29 Jan 2023 11:29:59 +0800 Subject: [PATCH 1/3] Optional match does not support where clauses --- .../optional-match.md | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md b/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md index e25925621e4..087caaa0dc5 100644 --- a/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md +++ b/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md @@ -10,19 +10,27 @@ 本文操作仅适用于 nGQL 中的 openCypher 方式。 +## 使用限制 + +`OPTIONAL MATCH`语句中暂不支持使用`WHERE`子句。 + ## 示例 `MATCH`语句中使用`OPTIONAL MATCH`的示例如下： ```ngql nebula> MATCH (m)-[]->(n) WHERE id(m)=="player100" \ - OPTIONAL MATCH (n)-[]->(l) WHERE id(n)=="player125" \ + OPTIONAL MATCH (n)-[]->(l) \ RETURN id(m),id(n),id(l); +-------------+-------------+-------------+ | id(m) | id(n) | id(l) | +-------------+-------------+-------------+ | "player100" | "team204" | __NULL__ | -| "player100" | "player101" | __NULL__ | +| "player100" | "player101" | "team204" | +| "player100" | "player101" | "team215" | +| "player100" | "player101" | "player100" | +| "player100" | "player101" | "player102" | +| "player100" | "player101" | "player125" | | "player100" | "player125" | "team204" | | "player100" | "player125" | "player100" | +-------------+-------------+-------------+ @@ -32,11 +40,16 @@ nebula> MATCH (m)-[]->(n) WHERE id(m)=="player100" \ ```ngql nebula> MATCH (m)-[]->(n) WHERE id(m)=="player100" \ - MATCH (n)-[]->(l) WHERE id(n)=="player125" \ + MATCH (n)-[]->(l) \ RETURN id(m),id(n),id(l); +-------------+-------------+-------------+ | id(m) | id(n) | id(l) | +-------------+-------------+-------------+ +| "player100" | "player101" | "team204" | +| "player100" | "player101" | "team215" | +| "player100" | "player101" | "player100" | +| "player100" | "player101" | "player102" | +| "player100" | "player101" | "player125" | | "player100" | "player125" | "team204" | | "player100" | "player125" | "player100" | +-------------+-------------+-------------+ From afb57cecd623684ad12248f4b9097e4abd5e71e1 Mon Sep 17 00:00:00 2001 From: Abby <78209557+abby-cyber@users.noreply.github.com> Date: Sun, 29 Jan 2023 11:32:39 +0800 Subject: [PATCH 2/3] Update 6.cheatsheet-for-ngql-command.md --- docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md b/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md index f88544a6598..c70127c8f2e 100644 --- a/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md +++ b/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md @@ -214,7 +214,7 @@ | 模式 | 示例 | 说明 | | ------------------- | ------------------------------------------------------------ | ---------------------------------------------- | - |作为MATCH语句的可选项去匹配图数据库中的模式 | `MATCH (m)-[]->(n) WHERE id(m)=="player100" OPTIONAL MATCH (n)-[]->(l) WHERE id(n)=="player125" RETURN id(m),id(n),id(l)` | 如果图数据库中没有对应的模式，对应的列返回NULL。| + |作为MATCH语句的可选项去匹配图数据库中的模式 | `MATCH (m)-[]->(n) WHERE id(m)=="player100" OPTIONAL MATCH (n)-[]->(l) RETURN id(m),id(n),id(l)` | 如果图数据库中没有对应的模式，对应的列返回`NULL`。| * [LOOKUP](../3.ngql-guide/7.general-query-statements/5.lookup.md) From 6b1c50b9575b21c85f14b61c9cdbc449297dfb4a Mon Sep 17 00:00:00 2001 From: Abby <78209557+abby-cyber@users.noreply.github.com> Date: Sun, 29 Jan 2023 12:00:13 +0800 Subject: [PATCH 3/3] desc updates --- docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md | 2 +- .../3.ngql-guide/7.general-query-statements/optional-match.md | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md b/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md index c70127c8f2e..5b48a2c7c2a 100644 --- a/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md +++ b/docs-2.0/2.quick-start/6.cheatsheet-for-ngql-command.md @@ -214,7 +214,7 @@ | 模式 | 示例 | 说明 | | ------------------- | ------------------------------------------------------------ | ---------------------------------------------- | - |作为MATCH语句的可选项去匹配图数据库中的模式 | `MATCH (m)-[]->(n) WHERE id(m)=="player100" OPTIONAL MATCH (n)-[]->(l) RETURN id(m),id(n),id(l)` | 如果图数据库中没有对应的模式，对应的列返回`NULL`。| + |作为`MATCH`语句的可选项去匹配图数据库中的模式 | `MATCH (m)-[]->(n) WHERE id(m)=="player100" OPTIONAL MATCH (n)-[]->(l) RETURN id(m),id(n),id(l)` | 如果图数据库中没有对应的模式，对应的列返回`NULL`。| * [LOOKUP](../3.ngql-guide/7.general-query-statements/5.lookup.md) diff --git a/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md b/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md index 087caaa0dc5..48d03858b83 100644 --- a/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md +++ b/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md @@ -12,7 +12,7 @@ ## 使用限制 -`OPTIONAL MATCH`语句中暂不支持使用`WHERE`子句。 +`OPTIONAL MATCH`子句中暂不支持使用`WHERE`子句。 ## 示例