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Commit5254958

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Add CREATE TABLESPACE ... WITH ... Options
Tablespaces have a few options which can be set on them to give PG hintsas to how the tablespace behaves (perhaps it's faster for sequentialscans, or better able to handle random access, etc). These options wereonly available through the ALTER TABLESPACE command.This adds the ability to set these options at CREATE TABLESPACE time,removing the need to do both a CREATE TABLESPACE and ALTER TABLESPACE toget the correct options set on the tablespace.Vik Fearing, reviewed by Michael Paquier.
1 parent115f414 commit5254958

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8 files changed

+61
-3
lines changed

8 files changed

+61
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lines changed

‎doc/src/sgml/ref/create_tablespace.sgml

Lines changed: 22 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -21,7 +21,10 @@ PostgreSQL documentation
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<refsynopsisdiv>
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<synopsis>
24-
CREATE TABLESPACE <replaceable class="parameter">tablespace_name</replaceable> [ OWNER <replaceable class="parameter">user_name</replaceable> ] LOCATION '<replaceable class="parameter">directory</replaceable>'
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CREATE TABLESPACE <replaceable class="parameter">tablespace_name</replaceable>
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[ OWNER <replaceable class="parameter">user_name</replaceable> ]
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LOCATION '<replaceable class="parameter">directory</replaceable>'
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[ WITH ( <replaceable class="PARAMETER">tablespace_option</replaceable> = <replaceable class="PARAMETER">value</replaceable> [, ... ] ) ]
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</synopsis>
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</refsynopsisdiv>
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@@ -87,6 +90,24 @@ CREATE TABLESPACE <replaceable class="parameter">tablespace_name</replaceable> [
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">tablespace_option</replaceable></term>
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<listitem>
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<para>
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A tablespace parameter to be set or reset. Currently, the only
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available parameters are <varname>seq_page_cost</> and
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<varname>random_page_cost</>. Setting either value for a particular
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tablespace will override the planner's usual estimate of the cost of
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reading pages from tables in that tablespace, as established by
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the configuration parameters of the same name (see
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<xref linkend="guc-seq-page-cost">,
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<xref linkend="guc-random-page-cost">). This may be useful if one
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tablespace is located on a disk which is faster or slower than the
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remainder of the I/O subsystem.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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‎src/backend/commands/tablespace.c

Lines changed: 11 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -239,6 +239,7 @@ CreateTableSpace(CreateTableSpaceStmt *stmt)
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Oidtablespaceoid;
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char*location;
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OidownerId;
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DatumnewOptions;
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/* Must be super user */
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if (!superuser())
@@ -322,7 +323,16 @@ CreateTableSpace(CreateTableSpaceStmt *stmt)
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values[Anum_pg_tablespace_spcowner-1]=
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ObjectIdGetDatum(ownerId);
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nulls[Anum_pg_tablespace_spcacl-1]= true;
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nulls[Anum_pg_tablespace_spcoptions-1]= true;
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/* Generate new proposed spcoptions (text array) */
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newOptions=transformRelOptions((Datum)0,
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stmt->options,
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NULL,NULL, false, false);
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(void)tablespace_reloptions(newOptions, true);
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if (newOptions!= (Datum)0)
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values[Anum_pg_tablespace_spcoptions-1]=newOptions;
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else
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nulls[Anum_pg_tablespace_spcoptions-1]= true;
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tuple=heap_form_tuple(rel->rd_att,values,nulls);
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‎src/backend/nodes/copyfuncs.c

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3370,6 +3370,7 @@ _copyCreateTableSpaceStmt(const CreateTableSpaceStmt *from)
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COPY_STRING_FIELD(tablespacename);
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COPY_STRING_FIELD(owner);
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COPY_STRING_FIELD(location);
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COPY_NODE_FIELD(options);
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returnnewnode;
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}

‎src/backend/nodes/equalfuncs.c

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Original file line numberDiff line numberDiff line change
@@ -1610,6 +1610,7 @@ _equalCreateTableSpaceStmt(const CreateTableSpaceStmt *a, const CreateTableSpace
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COMPARE_STRING_FIELD(tablespacename);
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COMPARE_STRING_FIELD(owner);
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COMPARE_STRING_FIELD(location);
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COMPARE_NODE_FIELD(options);
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return true;
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}

‎src/backend/parser/gram.y

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -3588,12 +3588,13 @@ opt_procedural:
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*
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*****************************************************************************/
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CreateTableSpaceStmt:CREATETABLESPACEnameOptTableSpaceOwnerLOCATIONSconst
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CreateTableSpaceStmt:CREATETABLESPACEnameOptTableSpaceOwnerLOCATIONSconstopt_reloptions
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{
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CreateTableSpaceStmt *n = makeNode(CreateTableSpaceStmt);
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n->tablespacename =$3;
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n->owner =$4;
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n->location =$6;
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n->options =$7;
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$$ = (Node *) n;
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}
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;

‎src/include/nodes/parsenodes.h

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Original file line numberDiff line numberDiff line change
@@ -1669,6 +1669,7 @@ typedef struct CreateTableSpaceStmt
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char*tablespacename;
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char*owner;
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char*location;
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List*options;
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}CreateTableSpaceStmt;
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typedefstructDropTableSpaceStmt

‎src/test/regress/input/tablespace.source

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,3 +1,13 @@
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-- create a tablespace using WITH clause
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CREATE TABLESPACE testspacewith LOCATION '@testtablespace@' WITH (some_nonexistent_parameter = true); -- fail
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CREATE TABLESPACE testspacewith LOCATION '@testtablespace@' WITH (random_page_cost = 3.0); -- ok
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-- check to see the parameter was used
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SELECT spcoptions FROM pg_tablespace WHERE spcname = 'testspacewith';
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-- drop the tablespace so we can re-use the location
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DROP TABLESPACE testspacewith;
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-- create a tablespace we can use
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CREATE TABLESPACE testspace LOCATION '@testtablespace@';
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‎src/test/regress/output/tablespace.source

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Original file line numberDiff line numberDiff line change
@@ -1,3 +1,16 @@
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-- create a tablespace using WITH clause
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CREATE TABLESPACE testspacewith LOCATION '@testtablespace@' WITH (some_nonexistent_parameter = true); -- fail
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ERROR: unrecognized parameter "some_nonexistent_parameter"
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CREATE TABLESPACE testspacewith LOCATION '@testtablespace@' WITH (random_page_cost = 3.0); -- ok
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-- check to see the parameter was used
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SELECT spcoptions FROM pg_tablespace WHERE spcname = 'testspacewith';
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spcoptions
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------------------------
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{random_page_cost=3.0}
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(1 row)
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-- drop the tablespace so we can re-use the location
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DROP TABLESPACE testspacewith;
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-- create a tablespace we can use
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CREATE TABLESPACE testspace LOCATION '@testtablespace@';
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-- try setting and resetting some properties for the new tablespace

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