yujie.zhang (he/him)

# Which issue does this PR close? Closes #670 . # Rationale for this change # What changes are included in this PR? - Modify http api - Adapt to...

**Is your feature request related to a problem? Please describe.** **Describe the solution you'd like**  **Describe alternatives you've considered** **Additional context**

**Is your feature request related to a problem? Please describe.** - docs: Investigate the system tables required by the time series database - Store information through read-only memory tables -...

**Is your feature request related to a problem? Please describe.** Returns a random sample of N field values. **Describe the solution you'd like** Need add custom operator - Syntax ```sql...

**Is your feature request related to a problem? Please describe.** returns the difference between the first row and other rows **Describe the solution you'd like** - Syntax ```sql DIFFERENCE( expr...

[Feature] Enhanc RowExpressionToDomainsVisitor to support not equal expr push down

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**Is your feature request related to a problem? Please describe.** Expr pushed down to tskv, the binary expression with '!=' is not supported yet. support Not Equals operator `` (or...

**Is your feature request related to a problem? Please describe.** Returns the field value with the most recent timestamp. **Describe the solution you'd like** - Syntax ```sql --- Returns the...

**Is your feature request related to a problem? Please describe.** Returns the field value with the oldest timestamp. **Describe the solution you'd like** - Syntax ```sql --- Returns the oldest...

**Is your feature request related to a problem? Please describe.** returns the non-null value or values that occur most often in a specified expression **Describe the solution you'd like** -...

**Is your feature request related to a problem? Please describe.** Expr pushed down to tskv, the 'BETWEEN' expression is not supported yet. **Describe the solution you'd like** - syntax ```...