[WIP] Feature: Videx-For-Postgresql

[TiNnNnnn]

Videx For Postgresql

1. Videx-for-pg is developing in the form of a PostgreSQL plugin.
2. Currently, only copying of local statistical information is supported

Qucik Start

Step1: compile videx

1. Copy the pg/videx folder to the contrib folder in your pg directory (such as postgresql17.5)
2. Go into postgresql17.5/contirb/videx:

make && make install

Step2：register videx in pg

1. Modify postgresql.conf:

shared_preload_libraries = 'videx'		# (change requires restart)

2. Start your pg service and psql:

create extension videx;

Step3: use videx

1. Create videx table using videx storage

CREATE TABLE V_REGION (
    R_REGIONKEY    SERIAL,
    R_NAME         CHAR(25),
    R_COMMENT      VARCHAR(152)
) USING VIDEX;

2. Use self-function videx_analyze to copy statistics

SELECT videx_analyze('REGION'::regclass, 'V_REGION'::regclass)"

4. Manually create same index like srouce table
5. explain sqls

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