Support CREATE EXTENSION IF NOT EXISTS

JoshInnis · JoshInnis · commit c3ddcefec93f · 2024-09-25T23:13:55.000-05:00
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 # PostGraph
 
-[![Codacy Badge](https://api.codacy.com/project/badge/Grade/854cafdbd0394189bec10e8fdd17df7f)](https://app.codacy.com/gh/PostGraphDB/postgraph?utm_source=github.com&utm_medium=referral&utm_content=PostGraphDB/postgraph&utm_campaign=Badge_Grade)   <a href="https://github.com/PostGraphDB/PostGraph/blob/master/LICENSE"><img src="https://img.shields.io/github/license/PostGraphDB/PostGraph"/></a>   <a href="https://github.com/PostGraphDB/PostGraph/issues"><img src="https://img.shields.io/github/issues/PostGraphDB/PostGraph"/></a>   <a href="https://github.com/PostGraphDB/PostGraph/network/members"><img src="https://img.shields.io/github/forks/PostGraphDB/PostGraph"/></a>   <a href="https://github.com/PostGraphDB/PostGraph/stargazers"><img src="https://img.shields.io/github/stars/PostGraphDB/PostGraph"/></a>   <a href="https://discord.gg/KDTTx2vz2m"><img src="https://img.shields.io/discord/1036610864071053413.svg?label=discord&style=flat&color=5a66f6"></a>
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/854cafdbd0394189bec10e8fdd17df7f)](https://app.codacy.com/gh/PostGraphDB/postgraph?utm_source=github.com&utm_medium=referral&utm_content=PostGraphDB/postgraph&utm_campaign=Badge_Grade)   <a href="https://github.com/PostGraphDB/PostGraph/blob/master/LICENSE"><img src="https://img.shields.io/github/license/PostGraphDB/PostGraph"/></a>   <a href="https://github.com/PostGraphDB/PostGraph/issues"><img src="https://img.shields.io/github/issues/PostGraphDB/PostGraph"/></a>   <a href="https://github.com/PostGraphDB/PostGraph/network/members"><img src="https://img.shields.io/github/forks/PostGraphDB/PostGraph"/></a>   <a href="https://github.com/PostGraphDB/PostGraph/stargazers"><img src="https://img.shields.io/github/stars/PostGraphDB/PostGraph"/></a>
 <p align="center">
  <img src="/logo.png">
 </p>
@@ -51,14 +51,7 @@ shared_preload_libraries = 'postgraph'
 ```
 
 POSTGIS Dependencies:
-autoconf
-automake
-libtool
-libxml2-devel
-geos-devel
-proj-devel
-protobuf-devel protobuf-c-compiler protobuf-compiler
-gdal-devel
+autoconf automake libtool libxml2-devel geos-devel proj-devel protobuf-devel protobuf-c-compiler protobuf-compiler gdal-devel
 
 ## Quick Start
 
@@ -87,25 +80,6 @@ Find data with the MATCH command
 MATCH (n) RETURN n;
 ```
 
-## Roadmap
-
-Completed:
--   Support for the OpenCypher Query Language
--   Vector Embeddings, powered by [pgVector](https://github.com/pgvector/pgvector)
--   Support for Time data
-
-In Progress:
--   Support For IVFFLAT Indices, Approximate K-Nearest Neighbors
--   Support for Geographic Information Systems, powered by [PostGIS](http://postgis.net/)
-
-Planned
--   Support For HNSW Indices, Faster Approximate K-Nearest Neighbors
--   Support For Full Text Search, For combing with Vector Embeddings for Natural Language Processing
--   Support of Time-Series Graph Data, powered by [TimeScaleDB](https://github.com/timescale/timescaledb)
--   [Machine Learning Techniques](https://github.com/postgresml/postgresml)
--   Label Partitioning - For advanced storage and performance techniques
--   Geospatial Trajectory Data, powered by [MobilityDB](https://github.com/MobilityDB/MobilityDB)
-
 ## Thank You to All the Supporters!
 ![Stargazers repo roster for @Postgraphdb/postgraph](http://bytecrank.com/nastyox/reporoster/php/stargazersSVG.php?user=Postgraphdb&repo=postgraph)
 ![Forkers repo roster for @Postgraphdb/postgraph](http://bytecrank.com/nastyox/reporoster/php/forkersSVG.php?user=Postgraphdb&repo=postgraph)
diff --git a/regress/expected/cypher_order.out.diff b/regress/expected/cypher_order.out.diff
diff --git a/regress/expected/new_cypher.out b/regress/expected/new_cypher.out
@@ -19,6 +19,8 @@ LOAD 'postgraph';
 CREATE EXTENSION postgraph;
 ERROR:  extension "postgraph" already exists
 CREATE EXTENSION hstore;
+CREATE EXTENSION IF NOT EXISTS hstore;
+NOTICE:  extension "hstore" already exists, skipping
 -- Basic Graph creation
 CREATE GRAPH new_cypher;
 NOTICE:  graph "new_cypher" has been created
diff --git a/regress/sql/new_cypher.sql b/regress/sql/new_cypher.sql
@@ -20,7 +20,7 @@ LOAD 'postgraph';
 
 CREATE EXTENSION postgraph;
 CREATE EXTENSION hstore;
-
+CREATE EXTENSION IF NOT EXISTS hstore;
 -- Basic Graph creation
 CREATE GRAPH new_cypher;
 
diff --git a/src/backend/parser/cypher_gram.y b/src/backend/parser/cypher_gram.y
@@ -92,13 +92,13 @@
                  GRAPH GROUP GROUPS GROUPING
                  FALSE_P FILTER FIRST_P FOLLOWING FROM
                  HAVING
-                 ILIKE IN INTERSECT INTERVAL IS
+                 IF ILIKE IN INTERSECT INTERVAL IS
                  LAST_P LIKE LIMIT LOCALTIME LOCALTIMESTAMP
                  MATCH MERGE 
                  NO NOT NULL_P NULLS_LA
                  OPTIONAL OTHERS OR ORDER OVER OVERLAPS
                  PARTITION PRECEDING
-                 RANGE REMOVE RETURN ROLLUP ROW ROWS
+                 RANGE REMOVE REPLACE RETURN ROLLUP ROW ROWS
                  SET SETS SKIP SOME STARTS
                  TIME TIES THEN TIMESTAMP TRUE_P
                  UNBOUNDED UNION UNWIND USE USING
@@ -123,7 +123,7 @@
 %type <node> match cypher_varlen_opt cypher_range_opt cypher_range_idx
              cypher_range_idx_opt
 %type <integer> Iconst
-%type <boolean> optional_opt
+%type <boolean> optional_opt opt_or_replace
 
 /* CREATE clause */
 %type <node> create
@@ -981,8 +981,24 @@ create:
             
             $$ = (Node *) n;
         }
+	| CREATE EXTENSION IF NOT EXISTS IDENTIFIER
+		{
+			CreateExtensionStmt *n = makeNode(CreateExtensionStmt);
+		
+        	n->extname = $6;
+			n->if_not_exists = true;
+			n->options = NULL;
+		
+        	$$ = (Node *) n;
+		}
     ;
 
+
+opt_or_replace:
+			OR REPLACE								{ $$ = true; }
+			| /*EMPTY*/								{ $$ = false; }
+		;
+
 /*
  * SET and REMOVE clause
  */
diff --git a/src/include/nodes/cypher_nodes.h b/src/include/nodes/cypher_nodes.h
@@ -225,6 +225,9 @@ typedef struct cypher_drop_graph
     bool cascade;
 } cypher_drop_graph;
 
+
+
+
 /*
  * expression
  */
diff --git a/src/include/parser/cypher_kwlist.h b/src/include/parser/cypher_kwlist.h
@@ -41,6 +41,7 @@ PG_KEYWORD("group", GROUP, RESERVED_KEYWORD)
 PG_KEYWORD("grouping", GROUPING, RESERVED_KEYWORD)
 PG_KEYWORD("groups", GROUPS, RESERVED_KEYWORD)
 PG_KEYWORD("having", HAVING, RESERVED_KEYWORD)
+PG_KEYWORD("if", IF, RESERVED_KEYWORD)
 PG_KEYWORD("ilike", ILIKE, RESERVED_KEYWORD)
 PG_KEYWORD("in", IN, RESERVED_KEYWORD)
 PG_KEYWORD("intersect", INTERSECT, RESERVED_KEYWORD)
@@ -67,6 +68,7 @@ PG_KEYWORD("partition", PARTITION, RESERVED_KEYWORD)
 PG_KEYWORD("preceding", PRECEDING, RESERVED_KEYWORD)
 PG_KEYWORD("range", RANGE, RESERVED_KEYWORD)
 PG_KEYWORD("remove", REMOVE, RESERVED_KEYWORD)
+PG_KEYWORD("replace", REPLACE, RESERVED_KEYWORD)
 PG_KEYWORD("return", RETURN, RESERVED_KEYWORD)
 PG_KEYWORD("rollup", ROLLUP, RESERVED_KEYWORD)
 PG_KEYWORD("row", ROW, RESERVED_KEYWORD)
