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Support parsing SQL Server SELECT <First sql #29153

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FlyingZC opened this issue Nov 24, 2023 · 4 comments · Fixed by #29721
Closed

Support parsing SQL Server SELECT <First sql #29153

FlyingZC opened this issue Nov 24, 2023 · 4 comments · Fixed by #29721

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@FlyingZC
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Background

Hi community.
This issue is for #29149.

The ShardingSphere SQL parser engine helps users to parse SQL to create the AST (Abstract Syntax Tree) and visit the AST to get SQLStatement (Java Object). Currently, we are planning to enhance the support for SQL Server SQL parsing in ShardingSphere.

More details:
https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/

Task

This issue is to support more SQL Server sql parsing, as follows:

SELECT <First line>
FROM <Second line>
WHERE <Third line>

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SELECT reason, score,
      script = JSON_VALUE(details, '$.implementationDetails.script'),
      planForceDetails.*,
      estimated_gain = (regressedPlanExecutionCount + recommendedPlanExecutionCount)
                  * (regressedPlanCpuTimeAverage - recommendedPlanCpuTimeAverage)/1000000,
      error_prone = IIF(regressedPlanErrorCount > recommendedPlanErrorCount, 'YES','NO')
FROM sys.dm_db_tuning_recommendations
CROSS APPLY OPENJSON (Details, '$.planForceDetails')
    WITH (  [query_id] int '$.queryId',
            regressedPlanId int '$.regressedPlanId',
            recommendedPlanId int '$.recommendedPlanId',
            regressedPlanErrorCount int,
            recommendedPlanErrorCount int,
            regressedPlanExecutionCount int,
            regressedPlanCpuTimeAverage float,
            recommendedPlanExecutionCount int,
            recommendedPlanCpuTimeAverage float
          ) AS planForceDetails

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INSERT @table1 (c2, is_transient) VALUES (N'sample durable', 0)

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INSERT @table1 (c2, is_transient) VALUES (N'sample non-durable', 1)

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SELECT product_id   
FROM products   
WHERE CONTAINS(product_description, '"Snap Happy 100EZ" OR FORMSOF(THESAURUS,"Snap Happy") OR "100EZ"')
AND product_cost < 200

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Process

  1. First confirm that this is a correct SQL Server sql syntax, if not please leave a message under the issue and ignore it;
  2. Compare SQL definitions in Official SQL Doc and ShardingSphere SQL Doc;
  3. If there is any difference in ShardingSphere SQL Doc, please correct them by referring to the Official SQL Doc;
  4. Run mvn install the current_file_module;
  5. Check whether there are any exceptions. If indeed, please fix them. (Especially xxxVisitor.class);
  6. Add new corresponding SQL case in SQL Cases and expected parsed result in Expected Statement XML;
  7. Run SQLParserParameterizedTest to make sure no exceptions.

Relevant Skills

  1. Master JAVA language
  2. Have a basic understanding of Antlr g4 file
  3. Be familiar with SQL Server SQLs
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There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.

@github-actions github-actions bot added the stale label Dec 24, 2023
@TherChenYang
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@FlyingZC This issue can be assigned to me

@strongduanmu
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@TherChenYang Assigned. 👍🏻

@TherChenYang
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@strongduanmu Hope you can take a look when you have free time, thank you.

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3 participants