# Plugin Reference

- [Stream Ingestion Connectors](/release-1.2.0/configuration-reference/plugin-reference/stream-ingestion-connectors.md): This documents lists all the configurations for each of the supported stream ingestion connectors.
- [VAR\_POP](/release-1.2.0/configuration-reference/plugin-reference/var_pop.md): This section contains reference documentation for the VAR\_POP function.
- [VAR\_SAMP](/release-1.2.0/configuration-reference/plugin-reference/var_samp.md): This section contains reference documentation for the VAR\_SAMP function.
- [STDDEV\_POP](/release-1.2.0/configuration-reference/plugin-reference/stddev_pop.md): This section contains reference documentation for the STDDEV\_POP function.
- [STDDEV\_SAMP](/release-1.2.0/configuration-reference/plugin-reference/stddev_samp.md): This section contains reference documentation for the STDDEV\_SAMP function.